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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 | ||
25 | #include "qemu/osdep.h" | |
26 | #include <getopt.h> | |
27 | ||
28 | #include "qemu-common.h" | |
29 | #include "qemu-version.h" | |
30 | #include "qapi/error.h" | |
31 | #include "qapi/qapi-visit-block-core.h" | |
32 | #include "qapi/qobject-output-visitor.h" | |
33 | #include "qapi/qmp/qjson.h" | |
34 | #include "qapi/qmp/qdict.h" | |
35 | #include "qapi/qmp/qstring.h" | |
36 | #include "qemu/cutils.h" | |
37 | #include "qemu/config-file.h" | |
38 | #include "qemu/option.h" | |
39 | #include "qemu/error-report.h" | |
40 | #include "qemu/log.h" | |
41 | #include "qemu/main-loop.h" | |
42 | #include "qemu/module.h" | |
43 | #include "qemu/units.h" | |
44 | #include "qom/object_interfaces.h" | |
45 | #include "sysemu/block-backend.h" | |
46 | #include "block/block_int.h" | |
47 | #include "block/blockjob.h" | |
48 | #include "block/qapi.h" | |
49 | #include "crypto/init.h" | |
50 | #include "trace/control.h" | |
51 | ||
52 | #define QEMU_IMG_VERSION "qemu-img version " QEMU_FULL_VERSION \ | |
53 | "\n" QEMU_COPYRIGHT "\n" | |
54 | ||
55 | typedef struct img_cmd_t { | |
56 | const char *name; | |
57 | int (*handler)(int argc, char **argv); | |
58 | } img_cmd_t; | |
59 | ||
60 | enum { | |
61 | OPTION_OUTPUT = 256, | |
62 | OPTION_BACKING_CHAIN = 257, | |
63 | OPTION_OBJECT = 258, | |
64 | OPTION_IMAGE_OPTS = 259, | |
65 | OPTION_PATTERN = 260, | |
66 | OPTION_FLUSH_INTERVAL = 261, | |
67 | OPTION_NO_DRAIN = 262, | |
68 | OPTION_TARGET_IMAGE_OPTS = 263, | |
69 | OPTION_SIZE = 264, | |
70 | OPTION_PREALLOCATION = 265, | |
71 | OPTION_SHRINK = 266, | |
72 | OPTION_SALVAGE = 267, | |
73 | }; | |
74 | ||
75 | typedef enum OutputFormat { | |
76 | OFORMAT_JSON, | |
77 | OFORMAT_HUMAN, | |
78 | } OutputFormat; | |
79 | ||
80 | /* Default to cache=writeback as data integrity is not important for qemu-img */ | |
81 | #define BDRV_DEFAULT_CACHE "writeback" | |
82 | ||
83 | static void format_print(void *opaque, const char *name) | |
84 | { | |
85 | printf(" %s", name); | |
86 | } | |
87 | ||
88 | static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...) | |
89 | { | |
90 | va_list ap; | |
91 | ||
92 | va_start(ap, fmt); | |
93 | error_vreport(fmt, ap); | |
94 | va_end(ap); | |
95 | ||
96 | error_printf("Try 'qemu-img --help' for more information\n"); | |
97 | exit(EXIT_FAILURE); | |
98 | } | |
99 | ||
100 | static void QEMU_NORETURN missing_argument(const char *option) | |
101 | { | |
102 | error_exit("missing argument for option '%s'", option); | |
103 | } | |
104 | ||
105 | static void QEMU_NORETURN unrecognized_option(const char *option) | |
106 | { | |
107 | error_exit("unrecognized option '%s'", option); | |
108 | } | |
109 | ||
110 | /* Please keep in synch with qemu-img.texi */ | |
111 | static void QEMU_NORETURN help(void) | |
112 | { | |
113 | const char *help_msg = | |
114 | QEMU_IMG_VERSION | |
115 | "usage: qemu-img [standard options] command [command options]\n" | |
116 | "QEMU disk image utility\n" | |
117 | "\n" | |
118 | " '-h', '--help' display this help and exit\n" | |
119 | " '-V', '--version' output version information and exit\n" | |
120 | " '-T', '--trace' [[enable=]<pattern>][,events=<file>][,file=<file>]\n" | |
121 | " specify tracing options\n" | |
122 | "\n" | |
123 | "Command syntax:\n" | |
124 | #define DEF(option, callback, arg_string) \ | |
125 | " " arg_string "\n" | |
126 | #include "qemu-img-cmds.h" | |
127 | #undef DEF | |
128 | "\n" | |
129 | "Command parameters:\n" | |
130 | " 'filename' is a disk image filename\n" | |
131 | " 'objectdef' is a QEMU user creatable object definition. See the qemu(1)\n" | |
132 | " manual page for a description of the object properties. The most common\n" | |
133 | " object type is a 'secret', which is used to supply passwords and/or\n" | |
134 | " encryption keys.\n" | |
135 | " 'fmt' is the disk image format. It is guessed automatically in most cases\n" | |
136 | " 'cache' is the cache mode used to write the output disk image, the valid\n" | |
137 | " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n" | |
138 | " 'directsync' and 'unsafe' (default for convert)\n" | |
139 | " 'src_cache' is the cache mode used to read input disk images, the valid\n" | |
140 | " options are the same as for the 'cache' option\n" | |
141 | " 'size' is the disk image size in bytes. Optional suffixes\n" | |
142 | " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n" | |
143 | " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n" | |
144 | " supported. 'b' is ignored.\n" | |
145 | " 'output_filename' is the destination disk image filename\n" | |
146 | " 'output_fmt' is the destination format\n" | |
147 | " 'options' is a comma separated list of format specific options in a\n" | |
148 | " name=value format. Use -o ? for an overview of the options supported by the\n" | |
149 | " used format\n" | |
150 | " 'snapshot_param' is param used for internal snapshot, format\n" | |
151 | " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" | |
152 | " '[ID_OR_NAME]'\n" | |
153 | " '-c' indicates that target image must be compressed (qcow format only)\n" | |
154 | " '-u' allows unsafe backing chains. For rebasing, it is assumed that old and\n" | |
155 | " new backing file match exactly. The image doesn't need a working\n" | |
156 | " backing file before rebasing in this case (useful for renaming the\n" | |
157 | " backing file). For image creation, allow creating without attempting\n" | |
158 | " to open the backing file.\n" | |
159 | " '-h' with or without a command shows this help and lists the supported formats\n" | |
160 | " '-p' show progress of command (only certain commands)\n" | |
161 | " '-q' use Quiet mode - do not print any output (except errors)\n" | |
162 | " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n" | |
163 | " contain only zeros for qemu-img to create a sparse image during\n" | |
164 | " conversion. If the number of bytes is 0, the source will not be scanned for\n" | |
165 | " unallocated or zero sectors, and the destination image will always be\n" | |
166 | " fully allocated\n" | |
167 | " '--output' takes the format in which the output must be done (human or json)\n" | |
168 | " '-n' skips the target volume creation (useful if the volume is created\n" | |
169 | " prior to running qemu-img)\n" | |
170 | "\n" | |
171 | "Parameters to check subcommand:\n" | |
172 | " '-r' tries to repair any inconsistencies that are found during the check.\n" | |
173 | " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n" | |
174 | " kinds of errors, with a higher risk of choosing the wrong fix or\n" | |
175 | " hiding corruption that has already occurred.\n" | |
176 | "\n" | |
177 | "Parameters to convert subcommand:\n" | |
178 | " '-m' specifies how many coroutines work in parallel during the convert\n" | |
179 | " process (defaults to 8)\n" | |
180 | " '-W' allow to write to the target out of order rather than sequential\n" | |
181 | "\n" | |
182 | "Parameters to snapshot subcommand:\n" | |
183 | " 'snapshot' is the name of the snapshot to create, apply or delete\n" | |
184 | " '-a' applies a snapshot (revert disk to saved state)\n" | |
185 | " '-c' creates a snapshot\n" | |
186 | " '-d' deletes a snapshot\n" | |
187 | " '-l' lists all snapshots in the given image\n" | |
188 | "\n" | |
189 | "Parameters to compare subcommand:\n" | |
190 | " '-f' first image format\n" | |
191 | " '-F' second image format\n" | |
192 | " '-s' run in Strict mode - fail on different image size or sector allocation\n" | |
193 | "\n" | |
194 | "Parameters to dd subcommand:\n" | |
195 | " 'bs=BYTES' read and write up to BYTES bytes at a time " | |
196 | "(default: 512)\n" | |
197 | " 'count=N' copy only N input blocks\n" | |
198 | " 'if=FILE' read from FILE\n" | |
199 | " 'of=FILE' write to FILE\n" | |
200 | " 'skip=N' skip N bs-sized blocks at the start of input\n"; | |
201 | ||
202 | printf("%s\nSupported formats:", help_msg); | |
203 | bdrv_iterate_format(format_print, NULL, false); | |
204 | printf("\n\n" QEMU_HELP_BOTTOM "\n"); | |
205 | exit(EXIT_SUCCESS); | |
206 | } | |
207 | ||
208 | static QemuOptsList qemu_object_opts = { | |
209 | .name = "object", | |
210 | .implied_opt_name = "qom-type", | |
211 | .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), | |
212 | .desc = { | |
213 | { } | |
214 | }, | |
215 | }; | |
216 | ||
217 | static bool qemu_img_object_print_help(const char *type, QemuOpts *opts) | |
218 | { | |
219 | if (user_creatable_print_help(type, opts)) { | |
220 | exit(0); | |
221 | } | |
222 | return true; | |
223 | } | |
224 | ||
225 | static QemuOptsList qemu_source_opts = { | |
226 | .name = "source", | |
227 | .implied_opt_name = "file", | |
228 | .head = QTAILQ_HEAD_INITIALIZER(qemu_source_opts.head), | |
229 | .desc = { | |
230 | { } | |
231 | }, | |
232 | }; | |
233 | ||
234 | static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...) | |
235 | { | |
236 | int ret = 0; | |
237 | if (!quiet) { | |
238 | va_list args; | |
239 | va_start(args, fmt); | |
240 | ret = vprintf(fmt, args); | |
241 | va_end(args); | |
242 | } | |
243 | return ret; | |
244 | } | |
245 | ||
246 | ||
247 | static int print_block_option_help(const char *filename, const char *fmt) | |
248 | { | |
249 | BlockDriver *drv, *proto_drv; | |
250 | QemuOptsList *create_opts = NULL; | |
251 | Error *local_err = NULL; | |
252 | ||
253 | /* Find driver and parse its options */ | |
254 | drv = bdrv_find_format(fmt); | |
255 | if (!drv) { | |
256 | error_report("Unknown file format '%s'", fmt); | |
257 | return 1; | |
258 | } | |
259 | ||
260 | if (!drv->create_opts) { | |
261 | error_report("Format driver '%s' does not support image creation", fmt); | |
262 | return 1; | |
263 | } | |
264 | ||
265 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
266 | if (filename) { | |
267 | proto_drv = bdrv_find_protocol(filename, true, &local_err); | |
268 | if (!proto_drv) { | |
269 | error_report_err(local_err); | |
270 | qemu_opts_free(create_opts); | |
271 | return 1; | |
272 | } | |
273 | if (!proto_drv->create_opts) { | |
274 | error_report("Protocol driver '%s' does not support image creation", | |
275 | proto_drv->format_name); | |
276 | qemu_opts_free(create_opts); | |
277 | return 1; | |
278 | } | |
279 | create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); | |
280 | } | |
281 | ||
282 | if (filename) { | |
283 | printf("Supported options:\n"); | |
284 | } else { | |
285 | printf("Supported %s options:\n", fmt); | |
286 | } | |
287 | qemu_opts_print_help(create_opts, false); | |
288 | qemu_opts_free(create_opts); | |
289 | ||
290 | if (!filename) { | |
291 | printf("\n" | |
292 | "The protocol level may support further options.\n" | |
293 | "Specify the target filename to include those options.\n"); | |
294 | } | |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
299 | ||
300 | static BlockBackend *img_open_opts(const char *optstr, | |
301 | QemuOpts *opts, int flags, bool writethrough, | |
302 | bool quiet, bool force_share) | |
303 | { | |
304 | QDict *options; | |
305 | Error *local_err = NULL; | |
306 | BlockBackend *blk; | |
307 | options = qemu_opts_to_qdict(opts, NULL); | |
308 | if (force_share) { | |
309 | if (qdict_haskey(options, BDRV_OPT_FORCE_SHARE) | |
310 | && strcmp(qdict_get_str(options, BDRV_OPT_FORCE_SHARE), "on")) { | |
311 | error_report("--force-share/-U conflicts with image options"); | |
312 | qobject_unref(options); | |
313 | return NULL; | |
314 | } | |
315 | qdict_put_str(options, BDRV_OPT_FORCE_SHARE, "on"); | |
316 | } | |
317 | blk = blk_new_open(NULL, NULL, options, flags, &local_err); | |
318 | if (!blk) { | |
319 | error_reportf_err(local_err, "Could not open '%s': ", optstr); | |
320 | return NULL; | |
321 | } | |
322 | blk_set_enable_write_cache(blk, !writethrough); | |
323 | ||
324 | return blk; | |
325 | } | |
326 | ||
327 | static BlockBackend *img_open_file(const char *filename, | |
328 | QDict *options, | |
329 | const char *fmt, int flags, | |
330 | bool writethrough, bool quiet, | |
331 | bool force_share) | |
332 | { | |
333 | BlockBackend *blk; | |
334 | Error *local_err = NULL; | |
335 | ||
336 | if (!options) { | |
337 | options = qdict_new(); | |
338 | } | |
339 | if (fmt) { | |
340 | qdict_put_str(options, "driver", fmt); | |
341 | } | |
342 | ||
343 | if (force_share) { | |
344 | qdict_put_bool(options, BDRV_OPT_FORCE_SHARE, true); | |
345 | } | |
346 | blk = blk_new_open(filename, NULL, options, flags, &local_err); | |
347 | if (!blk) { | |
348 | error_reportf_err(local_err, "Could not open '%s': ", filename); | |
349 | return NULL; | |
350 | } | |
351 | blk_set_enable_write_cache(blk, !writethrough); | |
352 | ||
353 | return blk; | |
354 | } | |
355 | ||
356 | ||
357 | static int img_add_key_secrets(void *opaque, | |
358 | const char *name, const char *value, | |
359 | Error **errp) | |
360 | { | |
361 | QDict *options = opaque; | |
362 | ||
363 | if (g_str_has_suffix(name, "key-secret")) { | |
364 | qdict_put_str(options, name, value); | |
365 | } | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
370 | ||
371 | static BlockBackend *img_open(bool image_opts, | |
372 | const char *filename, | |
373 | const char *fmt, int flags, bool writethrough, | |
374 | bool quiet, bool force_share) | |
375 | { | |
376 | BlockBackend *blk; | |
377 | if (image_opts) { | |
378 | QemuOpts *opts; | |
379 | if (fmt) { | |
380 | error_report("--image-opts and --format are mutually exclusive"); | |
381 | return NULL; | |
382 | } | |
383 | opts = qemu_opts_parse_noisily(qemu_find_opts("source"), | |
384 | filename, true); | |
385 | if (!opts) { | |
386 | return NULL; | |
387 | } | |
388 | blk = img_open_opts(filename, opts, flags, writethrough, quiet, | |
389 | force_share); | |
390 | } else { | |
391 | blk = img_open_file(filename, NULL, fmt, flags, writethrough, quiet, | |
392 | force_share); | |
393 | } | |
394 | return blk; | |
395 | } | |
396 | ||
397 | ||
398 | static int add_old_style_options(const char *fmt, QemuOpts *opts, | |
399 | const char *base_filename, | |
400 | const char *base_fmt) | |
401 | { | |
402 | Error *err = NULL; | |
403 | ||
404 | if (base_filename) { | |
405 | qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, &err); | |
406 | if (err) { | |
407 | error_report("Backing file not supported for file format '%s'", | |
408 | fmt); | |
409 | error_free(err); | |
410 | return -1; | |
411 | } | |
412 | } | |
413 | if (base_fmt) { | |
414 | qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, &err); | |
415 | if (err) { | |
416 | error_report("Backing file format not supported for file " | |
417 | "format '%s'", fmt); | |
418 | error_free(err); | |
419 | return -1; | |
420 | } | |
421 | } | |
422 | return 0; | |
423 | } | |
424 | ||
425 | static int64_t cvtnum(const char *s) | |
426 | { | |
427 | int err; | |
428 | uint64_t value; | |
429 | ||
430 | err = qemu_strtosz(s, NULL, &value); | |
431 | if (err < 0) { | |
432 | return err; | |
433 | } | |
434 | if (value > INT64_MAX) { | |
435 | return -ERANGE; | |
436 | } | |
437 | return value; | |
438 | } | |
439 | ||
440 | static int img_create(int argc, char **argv) | |
441 | { | |
442 | int c; | |
443 | uint64_t img_size = -1; | |
444 | const char *fmt = "raw"; | |
445 | const char *base_fmt = NULL; | |
446 | const char *filename; | |
447 | const char *base_filename = NULL; | |
448 | char *options = NULL; | |
449 | Error *local_err = NULL; | |
450 | bool quiet = false; | |
451 | int flags = 0; | |
452 | ||
453 | for(;;) { | |
454 | static const struct option long_options[] = { | |
455 | {"help", no_argument, 0, 'h'}, | |
456 | {"object", required_argument, 0, OPTION_OBJECT}, | |
457 | {0, 0, 0, 0} | |
458 | }; | |
459 | c = getopt_long(argc, argv, ":F:b:f:ho:qu", | |
460 | long_options, NULL); | |
461 | if (c == -1) { | |
462 | break; | |
463 | } | |
464 | switch(c) { | |
465 | case ':': | |
466 | missing_argument(argv[optind - 1]); | |
467 | break; | |
468 | case '?': | |
469 | unrecognized_option(argv[optind - 1]); | |
470 | break; | |
471 | case 'h': | |
472 | help(); | |
473 | break; | |
474 | case 'F': | |
475 | base_fmt = optarg; | |
476 | break; | |
477 | case 'b': | |
478 | base_filename = optarg; | |
479 | break; | |
480 | case 'f': | |
481 | fmt = optarg; | |
482 | break; | |
483 | case 'o': | |
484 | if (!is_valid_option_list(optarg)) { | |
485 | error_report("Invalid option list: %s", optarg); | |
486 | goto fail; | |
487 | } | |
488 | if (!options) { | |
489 | options = g_strdup(optarg); | |
490 | } else { | |
491 | char *old_options = options; | |
492 | options = g_strdup_printf("%s,%s", options, optarg); | |
493 | g_free(old_options); | |
494 | } | |
495 | break; | |
496 | case 'q': | |
497 | quiet = true; | |
498 | break; | |
499 | case 'u': | |
500 | flags |= BDRV_O_NO_BACKING; | |
501 | break; | |
502 | case OPTION_OBJECT: { | |
503 | QemuOpts *opts; | |
504 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
505 | optarg, true); | |
506 | if (!opts) { | |
507 | goto fail; | |
508 | } | |
509 | } break; | |
510 | } | |
511 | } | |
512 | ||
513 | /* Get the filename */ | |
514 | filename = (optind < argc) ? argv[optind] : NULL; | |
515 | if (options && has_help_option(options)) { | |
516 | g_free(options); | |
517 | return print_block_option_help(filename, fmt); | |
518 | } | |
519 | ||
520 | if (optind >= argc) { | |
521 | error_exit("Expecting image file name"); | |
522 | } | |
523 | optind++; | |
524 | ||
525 | if (qemu_opts_foreach(&qemu_object_opts, | |
526 | user_creatable_add_opts_foreach, | |
527 | qemu_img_object_print_help, &error_fatal)) { | |
528 | goto fail; | |
529 | } | |
530 | ||
531 | /* Get image size, if specified */ | |
532 | if (optind < argc) { | |
533 | int64_t sval; | |
534 | ||
535 | sval = cvtnum(argv[optind++]); | |
536 | if (sval < 0) { | |
537 | if (sval == -ERANGE) { | |
538 | error_report("Image size must be less than 8 EiB!"); | |
539 | } else { | |
540 | error_report("Invalid image size specified! You may use k, M, " | |
541 | "G, T, P or E suffixes for "); | |
542 | error_report("kilobytes, megabytes, gigabytes, terabytes, " | |
543 | "petabytes and exabytes."); | |
544 | } | |
545 | goto fail; | |
546 | } | |
547 | img_size = (uint64_t)sval; | |
548 | } | |
549 | if (optind != argc) { | |
550 | error_exit("Unexpected argument: %s", argv[optind]); | |
551 | } | |
552 | ||
553 | bdrv_img_create(filename, fmt, base_filename, base_fmt, | |
554 | options, img_size, flags, quiet, &local_err); | |
555 | if (local_err) { | |
556 | error_reportf_err(local_err, "%s: ", filename); | |
557 | goto fail; | |
558 | } | |
559 | ||
560 | g_free(options); | |
561 | return 0; | |
562 | ||
563 | fail: | |
564 | g_free(options); | |
565 | return 1; | |
566 | } | |
567 | ||
568 | static void dump_json_image_check(ImageCheck *check, bool quiet) | |
569 | { | |
570 | QString *str; | |
571 | QObject *obj; | |
572 | Visitor *v = qobject_output_visitor_new(&obj); | |
573 | ||
574 | visit_type_ImageCheck(v, NULL, &check, &error_abort); | |
575 | visit_complete(v, &obj); | |
576 | str = qobject_to_json_pretty(obj); | |
577 | assert(str != NULL); | |
578 | qprintf(quiet, "%s\n", qstring_get_str(str)); | |
579 | qobject_unref(obj); | |
580 | visit_free(v); | |
581 | qobject_unref(str); | |
582 | } | |
583 | ||
584 | static void dump_human_image_check(ImageCheck *check, bool quiet) | |
585 | { | |
586 | if (!(check->corruptions || check->leaks || check->check_errors)) { | |
587 | qprintf(quiet, "No errors were found on the image.\n"); | |
588 | } else { | |
589 | if (check->corruptions) { | |
590 | qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n" | |
591 | "Data may be corrupted, or further writes to the image " | |
592 | "may corrupt it.\n", | |
593 | check->corruptions); | |
594 | } | |
595 | ||
596 | if (check->leaks) { | |
597 | qprintf(quiet, | |
598 | "\n%" PRId64 " leaked clusters were found on the image.\n" | |
599 | "This means waste of disk space, but no harm to data.\n", | |
600 | check->leaks); | |
601 | } | |
602 | ||
603 | if (check->check_errors) { | |
604 | qprintf(quiet, | |
605 | "\n%" PRId64 | |
606 | " internal errors have occurred during the check.\n", | |
607 | check->check_errors); | |
608 | } | |
609 | } | |
610 | ||
611 | if (check->total_clusters != 0 && check->allocated_clusters != 0) { | |
612 | qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, " | |
613 | "%0.2f%% fragmented, %0.2f%% compressed clusters\n", | |
614 | check->allocated_clusters, check->total_clusters, | |
615 | check->allocated_clusters * 100.0 / check->total_clusters, | |
616 | check->fragmented_clusters * 100.0 / check->allocated_clusters, | |
617 | check->compressed_clusters * 100.0 / | |
618 | check->allocated_clusters); | |
619 | } | |
620 | ||
621 | if (check->image_end_offset) { | |
622 | qprintf(quiet, | |
623 | "Image end offset: %" PRId64 "\n", check->image_end_offset); | |
624 | } | |
625 | } | |
626 | ||
627 | static int collect_image_check(BlockDriverState *bs, | |
628 | ImageCheck *check, | |
629 | const char *filename, | |
630 | const char *fmt, | |
631 | int fix) | |
632 | { | |
633 | int ret; | |
634 | BdrvCheckResult result; | |
635 | ||
636 | ret = bdrv_check(bs, &result, fix); | |
637 | if (ret < 0) { | |
638 | return ret; | |
639 | } | |
640 | ||
641 | check->filename = g_strdup(filename); | |
642 | check->format = g_strdup(bdrv_get_format_name(bs)); | |
643 | check->check_errors = result.check_errors; | |
644 | check->corruptions = result.corruptions; | |
645 | check->has_corruptions = result.corruptions != 0; | |
646 | check->leaks = result.leaks; | |
647 | check->has_leaks = result.leaks != 0; | |
648 | check->corruptions_fixed = result.corruptions_fixed; | |
649 | check->has_corruptions_fixed = result.corruptions != 0; | |
650 | check->leaks_fixed = result.leaks_fixed; | |
651 | check->has_leaks_fixed = result.leaks != 0; | |
652 | check->image_end_offset = result.image_end_offset; | |
653 | check->has_image_end_offset = result.image_end_offset != 0; | |
654 | check->total_clusters = result.bfi.total_clusters; | |
655 | check->has_total_clusters = result.bfi.total_clusters != 0; | |
656 | check->allocated_clusters = result.bfi.allocated_clusters; | |
657 | check->has_allocated_clusters = result.bfi.allocated_clusters != 0; | |
658 | check->fragmented_clusters = result.bfi.fragmented_clusters; | |
659 | check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0; | |
660 | check->compressed_clusters = result.bfi.compressed_clusters; | |
661 | check->has_compressed_clusters = result.bfi.compressed_clusters != 0; | |
662 | ||
663 | return 0; | |
664 | } | |
665 | ||
666 | /* | |
667 | * Checks an image for consistency. Exit codes: | |
668 | * | |
669 | * 0 - Check completed, image is good | |
670 | * 1 - Check not completed because of internal errors | |
671 | * 2 - Check completed, image is corrupted | |
672 | * 3 - Check completed, image has leaked clusters, but is good otherwise | |
673 | * 63 - Checks are not supported by the image format | |
674 | */ | |
675 | static int img_check(int argc, char **argv) | |
676 | { | |
677 | int c, ret; | |
678 | OutputFormat output_format = OFORMAT_HUMAN; | |
679 | const char *filename, *fmt, *output, *cache; | |
680 | BlockBackend *blk; | |
681 | BlockDriverState *bs; | |
682 | int fix = 0; | |
683 | int flags = BDRV_O_CHECK; | |
684 | bool writethrough; | |
685 | ImageCheck *check; | |
686 | bool quiet = false; | |
687 | bool image_opts = false; | |
688 | bool force_share = false; | |
689 | ||
690 | fmt = NULL; | |
691 | output = NULL; | |
692 | cache = BDRV_DEFAULT_CACHE; | |
693 | ||
694 | for(;;) { | |
695 | int option_index = 0; | |
696 | static const struct option long_options[] = { | |
697 | {"help", no_argument, 0, 'h'}, | |
698 | {"format", required_argument, 0, 'f'}, | |
699 | {"repair", required_argument, 0, 'r'}, | |
700 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
701 | {"object", required_argument, 0, OPTION_OBJECT}, | |
702 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
703 | {"force-share", no_argument, 0, 'U'}, | |
704 | {0, 0, 0, 0} | |
705 | }; | |
706 | c = getopt_long(argc, argv, ":hf:r:T:qU", | |
707 | long_options, &option_index); | |
708 | if (c == -1) { | |
709 | break; | |
710 | } | |
711 | switch(c) { | |
712 | case ':': | |
713 | missing_argument(argv[optind - 1]); | |
714 | break; | |
715 | case '?': | |
716 | unrecognized_option(argv[optind - 1]); | |
717 | break; | |
718 | case 'h': | |
719 | help(); | |
720 | break; | |
721 | case 'f': | |
722 | fmt = optarg; | |
723 | break; | |
724 | case 'r': | |
725 | flags |= BDRV_O_RDWR; | |
726 | ||
727 | if (!strcmp(optarg, "leaks")) { | |
728 | fix = BDRV_FIX_LEAKS; | |
729 | } else if (!strcmp(optarg, "all")) { | |
730 | fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; | |
731 | } else { | |
732 | error_exit("Unknown option value for -r " | |
733 | "(expecting 'leaks' or 'all'): %s", optarg); | |
734 | } | |
735 | break; | |
736 | case OPTION_OUTPUT: | |
737 | output = optarg; | |
738 | break; | |
739 | case 'T': | |
740 | cache = optarg; | |
741 | break; | |
742 | case 'q': | |
743 | quiet = true; | |
744 | break; | |
745 | case 'U': | |
746 | force_share = true; | |
747 | break; | |
748 | case OPTION_OBJECT: { | |
749 | QemuOpts *opts; | |
750 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
751 | optarg, true); | |
752 | if (!opts) { | |
753 | return 1; | |
754 | } | |
755 | } break; | |
756 | case OPTION_IMAGE_OPTS: | |
757 | image_opts = true; | |
758 | break; | |
759 | } | |
760 | } | |
761 | if (optind != argc - 1) { | |
762 | error_exit("Expecting one image file name"); | |
763 | } | |
764 | filename = argv[optind++]; | |
765 | ||
766 | if (output && !strcmp(output, "json")) { | |
767 | output_format = OFORMAT_JSON; | |
768 | } else if (output && !strcmp(output, "human")) { | |
769 | output_format = OFORMAT_HUMAN; | |
770 | } else if (output) { | |
771 | error_report("--output must be used with human or json as argument."); | |
772 | return 1; | |
773 | } | |
774 | ||
775 | if (qemu_opts_foreach(&qemu_object_opts, | |
776 | user_creatable_add_opts_foreach, | |
777 | qemu_img_object_print_help, &error_fatal)) { | |
778 | return 1; | |
779 | } | |
780 | ||
781 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
782 | if (ret < 0) { | |
783 | error_report("Invalid source cache option: %s", cache); | |
784 | return 1; | |
785 | } | |
786 | ||
787 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, | |
788 | force_share); | |
789 | if (!blk) { | |
790 | return 1; | |
791 | } | |
792 | bs = blk_bs(blk); | |
793 | ||
794 | check = g_new0(ImageCheck, 1); | |
795 | ret = collect_image_check(bs, check, filename, fmt, fix); | |
796 | ||
797 | if (ret == -ENOTSUP) { | |
798 | error_report("This image format does not support checks"); | |
799 | ret = 63; | |
800 | goto fail; | |
801 | } | |
802 | ||
803 | if (check->corruptions_fixed || check->leaks_fixed) { | |
804 | int corruptions_fixed, leaks_fixed; | |
805 | ||
806 | leaks_fixed = check->leaks_fixed; | |
807 | corruptions_fixed = check->corruptions_fixed; | |
808 | ||
809 | if (output_format == OFORMAT_HUMAN) { | |
810 | qprintf(quiet, | |
811 | "The following inconsistencies were found and repaired:\n\n" | |
812 | " %" PRId64 " leaked clusters\n" | |
813 | " %" PRId64 " corruptions\n\n" | |
814 | "Double checking the fixed image now...\n", | |
815 | check->leaks_fixed, | |
816 | check->corruptions_fixed); | |
817 | } | |
818 | ||
819 | ret = collect_image_check(bs, check, filename, fmt, 0); | |
820 | ||
821 | check->leaks_fixed = leaks_fixed; | |
822 | check->corruptions_fixed = corruptions_fixed; | |
823 | } | |
824 | ||
825 | if (!ret) { | |
826 | switch (output_format) { | |
827 | case OFORMAT_HUMAN: | |
828 | dump_human_image_check(check, quiet); | |
829 | break; | |
830 | case OFORMAT_JSON: | |
831 | dump_json_image_check(check, quiet); | |
832 | break; | |
833 | } | |
834 | } | |
835 | ||
836 | if (ret || check->check_errors) { | |
837 | if (ret) { | |
838 | error_report("Check failed: %s", strerror(-ret)); | |
839 | } else { | |
840 | error_report("Check failed"); | |
841 | } | |
842 | ret = 1; | |
843 | goto fail; | |
844 | } | |
845 | ||
846 | if (check->corruptions) { | |
847 | ret = 2; | |
848 | } else if (check->leaks) { | |
849 | ret = 3; | |
850 | } else { | |
851 | ret = 0; | |
852 | } | |
853 | ||
854 | fail: | |
855 | qapi_free_ImageCheck(check); | |
856 | blk_unref(blk); | |
857 | return ret; | |
858 | } | |
859 | ||
860 | typedef struct CommonBlockJobCBInfo { | |
861 | BlockDriverState *bs; | |
862 | Error **errp; | |
863 | } CommonBlockJobCBInfo; | |
864 | ||
865 | static void common_block_job_cb(void *opaque, int ret) | |
866 | { | |
867 | CommonBlockJobCBInfo *cbi = opaque; | |
868 | ||
869 | if (ret < 0) { | |
870 | error_setg_errno(cbi->errp, -ret, "Block job failed"); | |
871 | } | |
872 | } | |
873 | ||
874 | static void run_block_job(BlockJob *job, Error **errp) | |
875 | { | |
876 | AioContext *aio_context = blk_get_aio_context(job->blk); | |
877 | int ret = 0; | |
878 | ||
879 | aio_context_acquire(aio_context); | |
880 | job_ref(&job->job); | |
881 | do { | |
882 | float progress = 0.0f; | |
883 | aio_poll(aio_context, true); | |
884 | if (job->job.progress_total) { | |
885 | progress = (float)job->job.progress_current / | |
886 | job->job.progress_total * 100.f; | |
887 | } | |
888 | qemu_progress_print(progress, 0); | |
889 | } while (!job_is_ready(&job->job) && !job_is_completed(&job->job)); | |
890 | ||
891 | if (!job_is_completed(&job->job)) { | |
892 | ret = job_complete_sync(&job->job, errp); | |
893 | } else { | |
894 | ret = job->job.ret; | |
895 | } | |
896 | job_unref(&job->job); | |
897 | aio_context_release(aio_context); | |
898 | ||
899 | /* publish completion progress only when success */ | |
900 | if (!ret) { | |
901 | qemu_progress_print(100.f, 0); | |
902 | } | |
903 | } | |
904 | ||
905 | static int img_commit(int argc, char **argv) | |
906 | { | |
907 | int c, ret, flags; | |
908 | const char *filename, *fmt, *cache, *base; | |
909 | BlockBackend *blk; | |
910 | BlockDriverState *bs, *base_bs; | |
911 | BlockJob *job; | |
912 | bool progress = false, quiet = false, drop = false; | |
913 | bool writethrough; | |
914 | Error *local_err = NULL; | |
915 | CommonBlockJobCBInfo cbi; | |
916 | bool image_opts = false; | |
917 | AioContext *aio_context; | |
918 | ||
919 | fmt = NULL; | |
920 | cache = BDRV_DEFAULT_CACHE; | |
921 | base = NULL; | |
922 | for(;;) { | |
923 | static const struct option long_options[] = { | |
924 | {"help", no_argument, 0, 'h'}, | |
925 | {"object", required_argument, 0, OPTION_OBJECT}, | |
926 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
927 | {0, 0, 0, 0} | |
928 | }; | |
929 | c = getopt_long(argc, argv, ":f:ht:b:dpq", | |
930 | long_options, NULL); | |
931 | if (c == -1) { | |
932 | break; | |
933 | } | |
934 | switch(c) { | |
935 | case ':': | |
936 | missing_argument(argv[optind - 1]); | |
937 | break; | |
938 | case '?': | |
939 | unrecognized_option(argv[optind - 1]); | |
940 | break; | |
941 | case 'h': | |
942 | help(); | |
943 | break; | |
944 | case 'f': | |
945 | fmt = optarg; | |
946 | break; | |
947 | case 't': | |
948 | cache = optarg; | |
949 | break; | |
950 | case 'b': | |
951 | base = optarg; | |
952 | /* -b implies -d */ | |
953 | drop = true; | |
954 | break; | |
955 | case 'd': | |
956 | drop = true; | |
957 | break; | |
958 | case 'p': | |
959 | progress = true; | |
960 | break; | |
961 | case 'q': | |
962 | quiet = true; | |
963 | break; | |
964 | case OPTION_OBJECT: { | |
965 | QemuOpts *opts; | |
966 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
967 | optarg, true); | |
968 | if (!opts) { | |
969 | return 1; | |
970 | } | |
971 | } break; | |
972 | case OPTION_IMAGE_OPTS: | |
973 | image_opts = true; | |
974 | break; | |
975 | } | |
976 | } | |
977 | ||
978 | /* Progress is not shown in Quiet mode */ | |
979 | if (quiet) { | |
980 | progress = false; | |
981 | } | |
982 | ||
983 | if (optind != argc - 1) { | |
984 | error_exit("Expecting one image file name"); | |
985 | } | |
986 | filename = argv[optind++]; | |
987 | ||
988 | if (qemu_opts_foreach(&qemu_object_opts, | |
989 | user_creatable_add_opts_foreach, | |
990 | qemu_img_object_print_help, &error_fatal)) { | |
991 | return 1; | |
992 | } | |
993 | ||
994 | flags = BDRV_O_RDWR | BDRV_O_UNMAP; | |
995 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
996 | if (ret < 0) { | |
997 | error_report("Invalid cache option: %s", cache); | |
998 | return 1; | |
999 | } | |
1000 | ||
1001 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, | |
1002 | false); | |
1003 | if (!blk) { | |
1004 | return 1; | |
1005 | } | |
1006 | bs = blk_bs(blk); | |
1007 | ||
1008 | qemu_progress_init(progress, 1.f); | |
1009 | qemu_progress_print(0.f, 100); | |
1010 | ||
1011 | if (base) { | |
1012 | base_bs = bdrv_find_backing_image(bs, base); | |
1013 | if (!base_bs) { | |
1014 | error_setg(&local_err, | |
1015 | "Did not find '%s' in the backing chain of '%s'", | |
1016 | base, filename); | |
1017 | goto done; | |
1018 | } | |
1019 | } else { | |
1020 | /* This is different from QMP, which by default uses the deepest file in | |
1021 | * the backing chain (i.e., the very base); however, the traditional | |
1022 | * behavior of qemu-img commit is using the immediate backing file. */ | |
1023 | base_bs = backing_bs(bs); | |
1024 | if (!base_bs) { | |
1025 | error_setg(&local_err, "Image does not have a backing file"); | |
1026 | goto done; | |
1027 | } | |
1028 | } | |
1029 | ||
1030 | cbi = (CommonBlockJobCBInfo){ | |
1031 | .errp = &local_err, | |
1032 | .bs = bs, | |
1033 | }; | |
1034 | ||
1035 | aio_context = bdrv_get_aio_context(bs); | |
1036 | aio_context_acquire(aio_context); | |
1037 | commit_active_start("commit", bs, base_bs, JOB_DEFAULT, 0, | |
1038 | BLOCKDEV_ON_ERROR_REPORT, NULL, common_block_job_cb, | |
1039 | &cbi, false, &local_err); | |
1040 | aio_context_release(aio_context); | |
1041 | if (local_err) { | |
1042 | goto done; | |
1043 | } | |
1044 | ||
1045 | /* When the block job completes, the BlockBackend reference will point to | |
1046 | * the old backing file. In order to avoid that the top image is already | |
1047 | * deleted, so we can still empty it afterwards, increment the reference | |
1048 | * counter here preemptively. */ | |
1049 | if (!drop) { | |
1050 | bdrv_ref(bs); | |
1051 | } | |
1052 | ||
1053 | job = block_job_get("commit"); | |
1054 | assert(job); | |
1055 | run_block_job(job, &local_err); | |
1056 | if (local_err) { | |
1057 | goto unref_backing; | |
1058 | } | |
1059 | ||
1060 | if (!drop && bs->drv->bdrv_make_empty) { | |
1061 | ret = bs->drv->bdrv_make_empty(bs); | |
1062 | if (ret) { | |
1063 | error_setg_errno(&local_err, -ret, "Could not empty %s", | |
1064 | filename); | |
1065 | goto unref_backing; | |
1066 | } | |
1067 | } | |
1068 | ||
1069 | unref_backing: | |
1070 | if (!drop) { | |
1071 | bdrv_unref(bs); | |
1072 | } | |
1073 | ||
1074 | done: | |
1075 | qemu_progress_end(); | |
1076 | ||
1077 | blk_unref(blk); | |
1078 | ||
1079 | if (local_err) { | |
1080 | error_report_err(local_err); | |
1081 | return 1; | |
1082 | } | |
1083 | ||
1084 | qprintf(quiet, "Image committed.\n"); | |
1085 | return 0; | |
1086 | } | |
1087 | ||
1088 | /* | |
1089 | * Returns -1 if 'buf' contains only zeroes, otherwise the byte index | |
1090 | * of the first sector boundary within buf where the sector contains a | |
1091 | * non-zero byte. This function is robust to a buffer that is not | |
1092 | * sector-aligned. | |
1093 | */ | |
1094 | static int64_t find_nonzero(const uint8_t *buf, int64_t n) | |
1095 | { | |
1096 | int64_t i; | |
1097 | int64_t end = QEMU_ALIGN_DOWN(n, BDRV_SECTOR_SIZE); | |
1098 | ||
1099 | for (i = 0; i < end; i += BDRV_SECTOR_SIZE) { | |
1100 | if (!buffer_is_zero(buf + i, BDRV_SECTOR_SIZE)) { | |
1101 | return i; | |
1102 | } | |
1103 | } | |
1104 | if (i < n && !buffer_is_zero(buf + i, n - end)) { | |
1105 | return i; | |
1106 | } | |
1107 | return -1; | |
1108 | } | |
1109 | ||
1110 | /* | |
1111 | * Returns true iff the first sector pointed to by 'buf' contains at least | |
1112 | * a non-NUL byte. | |
1113 | * | |
1114 | * 'pnum' is set to the number of sectors (including and immediately following | |
1115 | * the first one) that are known to be in the same allocated/unallocated state. | |
1116 | * The function will try to align the end offset to alignment boundaries so | |
1117 | * that the request will at least end aligned and consequtive requests will | |
1118 | * also start at an aligned offset. | |
1119 | */ | |
1120 | static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum, | |
1121 | int64_t sector_num, int alignment) | |
1122 | { | |
1123 | bool is_zero; | |
1124 | int i, tail; | |
1125 | ||
1126 | if (n <= 0) { | |
1127 | *pnum = 0; | |
1128 | return 0; | |
1129 | } | |
1130 | is_zero = buffer_is_zero(buf, 512); | |
1131 | for(i = 1; i < n; i++) { | |
1132 | buf += 512; | |
1133 | if (is_zero != buffer_is_zero(buf, 512)) { | |
1134 | break; | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | tail = (sector_num + i) & (alignment - 1); | |
1139 | if (tail) { | |
1140 | if (is_zero && i <= tail) { | |
1141 | /* treat unallocated areas which only consist | |
1142 | * of a small tail as allocated. */ | |
1143 | is_zero = false; | |
1144 | } | |
1145 | if (!is_zero) { | |
1146 | /* align up end offset of allocated areas. */ | |
1147 | i += alignment - tail; | |
1148 | i = MIN(i, n); | |
1149 | } else { | |
1150 | /* align down end offset of zero areas. */ | |
1151 | i -= tail; | |
1152 | } | |
1153 | } | |
1154 | *pnum = i; | |
1155 | return !is_zero; | |
1156 | } | |
1157 | ||
1158 | /* | |
1159 | * Like is_allocated_sectors, but if the buffer starts with a used sector, | |
1160 | * up to 'min' consecutive sectors containing zeros are ignored. This avoids | |
1161 | * breaking up write requests for only small sparse areas. | |
1162 | */ | |
1163 | static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, | |
1164 | int min, int64_t sector_num, int alignment) | |
1165 | { | |
1166 | int ret; | |
1167 | int num_checked, num_used; | |
1168 | ||
1169 | if (n < min) { | |
1170 | min = n; | |
1171 | } | |
1172 | ||
1173 | ret = is_allocated_sectors(buf, n, pnum, sector_num, alignment); | |
1174 | if (!ret) { | |
1175 | return ret; | |
1176 | } | |
1177 | ||
1178 | num_used = *pnum; | |
1179 | buf += BDRV_SECTOR_SIZE * *pnum; | |
1180 | n -= *pnum; | |
1181 | sector_num += *pnum; | |
1182 | num_checked = num_used; | |
1183 | ||
1184 | while (n > 0) { | |
1185 | ret = is_allocated_sectors(buf, n, pnum, sector_num, alignment); | |
1186 | ||
1187 | buf += BDRV_SECTOR_SIZE * *pnum; | |
1188 | n -= *pnum; | |
1189 | sector_num += *pnum; | |
1190 | num_checked += *pnum; | |
1191 | if (ret) { | |
1192 | num_used = num_checked; | |
1193 | } else if (*pnum >= min) { | |
1194 | break; | |
1195 | } | |
1196 | } | |
1197 | ||
1198 | *pnum = num_used; | |
1199 | return 1; | |
1200 | } | |
1201 | ||
1202 | /* | |
1203 | * Compares two buffers sector by sector. Returns 0 if the first | |
1204 | * sector of each buffer matches, non-zero otherwise. | |
1205 | * | |
1206 | * pnum is set to the sector-aligned size of the buffer prefix that | |
1207 | * has the same matching status as the first sector. | |
1208 | */ | |
1209 | static int compare_buffers(const uint8_t *buf1, const uint8_t *buf2, | |
1210 | int64_t bytes, int64_t *pnum) | |
1211 | { | |
1212 | bool res; | |
1213 | int64_t i = MIN(bytes, BDRV_SECTOR_SIZE); | |
1214 | ||
1215 | assert(bytes > 0); | |
1216 | ||
1217 | res = !!memcmp(buf1, buf2, i); | |
1218 | while (i < bytes) { | |
1219 | int64_t len = MIN(bytes - i, BDRV_SECTOR_SIZE); | |
1220 | ||
1221 | if (!!memcmp(buf1 + i, buf2 + i, len) != res) { | |
1222 | break; | |
1223 | } | |
1224 | i += len; | |
1225 | } | |
1226 | ||
1227 | *pnum = i; | |
1228 | return res; | |
1229 | } | |
1230 | ||
1231 | #define IO_BUF_SIZE (2 * MiB) | |
1232 | ||
1233 | /* | |
1234 | * Check if passed sectors are empty (not allocated or contain only 0 bytes) | |
1235 | * | |
1236 | * Intended for use by 'qemu-img compare': Returns 0 in case sectors are | |
1237 | * filled with 0, 1 if sectors contain non-zero data (this is a comparison | |
1238 | * failure), and 4 on error (the exit status for read errors), after emitting | |
1239 | * an error message. | |
1240 | * | |
1241 | * @param blk: BlockBackend for the image | |
1242 | * @param offset: Starting offset to check | |
1243 | * @param bytes: Number of bytes to check | |
1244 | * @param filename: Name of disk file we are checking (logging purpose) | |
1245 | * @param buffer: Allocated buffer for storing read data | |
1246 | * @param quiet: Flag for quiet mode | |
1247 | */ | |
1248 | static int check_empty_sectors(BlockBackend *blk, int64_t offset, | |
1249 | int64_t bytes, const char *filename, | |
1250 | uint8_t *buffer, bool quiet) | |
1251 | { | |
1252 | int ret = 0; | |
1253 | int64_t idx; | |
1254 | ||
1255 | ret = blk_pread(blk, offset, buffer, bytes); | |
1256 | if (ret < 0) { | |
1257 | error_report("Error while reading offset %" PRId64 " of %s: %s", | |
1258 | offset, filename, strerror(-ret)); | |
1259 | return 4; | |
1260 | } | |
1261 | idx = find_nonzero(buffer, bytes); | |
1262 | if (idx >= 0) { | |
1263 | qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", | |
1264 | offset + idx); | |
1265 | return 1; | |
1266 | } | |
1267 | ||
1268 | return 0; | |
1269 | } | |
1270 | ||
1271 | /* | |
1272 | * Compares two images. Exit codes: | |
1273 | * | |
1274 | * 0 - Images are identical | |
1275 | * 1 - Images differ | |
1276 | * >1 - Error occurred | |
1277 | */ | |
1278 | static int img_compare(int argc, char **argv) | |
1279 | { | |
1280 | const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2; | |
1281 | BlockBackend *blk1, *blk2; | |
1282 | BlockDriverState *bs1, *bs2; | |
1283 | int64_t total_size1, total_size2; | |
1284 | uint8_t *buf1 = NULL, *buf2 = NULL; | |
1285 | int64_t pnum1, pnum2; | |
1286 | int allocated1, allocated2; | |
1287 | int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */ | |
1288 | bool progress = false, quiet = false, strict = false; | |
1289 | int flags; | |
1290 | bool writethrough; | |
1291 | int64_t total_size; | |
1292 | int64_t offset = 0; | |
1293 | int64_t chunk; | |
1294 | int c; | |
1295 | uint64_t progress_base; | |
1296 | bool image_opts = false; | |
1297 | bool force_share = false; | |
1298 | ||
1299 | cache = BDRV_DEFAULT_CACHE; | |
1300 | for (;;) { | |
1301 | static const struct option long_options[] = { | |
1302 | {"help", no_argument, 0, 'h'}, | |
1303 | {"object", required_argument, 0, OPTION_OBJECT}, | |
1304 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
1305 | {"force-share", no_argument, 0, 'U'}, | |
1306 | {0, 0, 0, 0} | |
1307 | }; | |
1308 | c = getopt_long(argc, argv, ":hf:F:T:pqsU", | |
1309 | long_options, NULL); | |
1310 | if (c == -1) { | |
1311 | break; | |
1312 | } | |
1313 | switch (c) { | |
1314 | case ':': | |
1315 | missing_argument(argv[optind - 1]); | |
1316 | break; | |
1317 | case '?': | |
1318 | unrecognized_option(argv[optind - 1]); | |
1319 | break; | |
1320 | case 'h': | |
1321 | help(); | |
1322 | break; | |
1323 | case 'f': | |
1324 | fmt1 = optarg; | |
1325 | break; | |
1326 | case 'F': | |
1327 | fmt2 = optarg; | |
1328 | break; | |
1329 | case 'T': | |
1330 | cache = optarg; | |
1331 | break; | |
1332 | case 'p': | |
1333 | progress = true; | |
1334 | break; | |
1335 | case 'q': | |
1336 | quiet = true; | |
1337 | break; | |
1338 | case 's': | |
1339 | strict = true; | |
1340 | break; | |
1341 | case 'U': | |
1342 | force_share = true; | |
1343 | break; | |
1344 | case OPTION_OBJECT: { | |
1345 | QemuOpts *opts; | |
1346 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
1347 | optarg, true); | |
1348 | if (!opts) { | |
1349 | ret = 2; | |
1350 | goto out4; | |
1351 | } | |
1352 | } break; | |
1353 | case OPTION_IMAGE_OPTS: | |
1354 | image_opts = true; | |
1355 | break; | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | /* Progress is not shown in Quiet mode */ | |
1360 | if (quiet) { | |
1361 | progress = false; | |
1362 | } | |
1363 | ||
1364 | ||
1365 | if (optind != argc - 2) { | |
1366 | error_exit("Expecting two image file names"); | |
1367 | } | |
1368 | filename1 = argv[optind++]; | |
1369 | filename2 = argv[optind++]; | |
1370 | ||
1371 | if (qemu_opts_foreach(&qemu_object_opts, | |
1372 | user_creatable_add_opts_foreach, | |
1373 | qemu_img_object_print_help, &error_fatal)) { | |
1374 | ret = 2; | |
1375 | goto out4; | |
1376 | } | |
1377 | ||
1378 | /* Initialize before goto out */ | |
1379 | qemu_progress_init(progress, 2.0); | |
1380 | ||
1381 | flags = 0; | |
1382 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
1383 | if (ret < 0) { | |
1384 | error_report("Invalid source cache option: %s", cache); | |
1385 | ret = 2; | |
1386 | goto out3; | |
1387 | } | |
1388 | ||
1389 | blk1 = img_open(image_opts, filename1, fmt1, flags, writethrough, quiet, | |
1390 | force_share); | |
1391 | if (!blk1) { | |
1392 | ret = 2; | |
1393 | goto out3; | |
1394 | } | |
1395 | ||
1396 | blk2 = img_open(image_opts, filename2, fmt2, flags, writethrough, quiet, | |
1397 | force_share); | |
1398 | if (!blk2) { | |
1399 | ret = 2; | |
1400 | goto out2; | |
1401 | } | |
1402 | bs1 = blk_bs(blk1); | |
1403 | bs2 = blk_bs(blk2); | |
1404 | ||
1405 | buf1 = blk_blockalign(blk1, IO_BUF_SIZE); | |
1406 | buf2 = blk_blockalign(blk2, IO_BUF_SIZE); | |
1407 | total_size1 = blk_getlength(blk1); | |
1408 | if (total_size1 < 0) { | |
1409 | error_report("Can't get size of %s: %s", | |
1410 | filename1, strerror(-total_size1)); | |
1411 | ret = 4; | |
1412 | goto out; | |
1413 | } | |
1414 | total_size2 = blk_getlength(blk2); | |
1415 | if (total_size2 < 0) { | |
1416 | error_report("Can't get size of %s: %s", | |
1417 | filename2, strerror(-total_size2)); | |
1418 | ret = 4; | |
1419 | goto out; | |
1420 | } | |
1421 | total_size = MIN(total_size1, total_size2); | |
1422 | progress_base = MAX(total_size1, total_size2); | |
1423 | ||
1424 | qemu_progress_print(0, 100); | |
1425 | ||
1426 | if (strict && total_size1 != total_size2) { | |
1427 | ret = 1; | |
1428 | qprintf(quiet, "Strict mode: Image size mismatch!\n"); | |
1429 | goto out; | |
1430 | } | |
1431 | ||
1432 | while (offset < total_size) { | |
1433 | int status1, status2; | |
1434 | ||
1435 | status1 = bdrv_block_status_above(bs1, NULL, offset, | |
1436 | total_size1 - offset, &pnum1, NULL, | |
1437 | NULL); | |
1438 | if (status1 < 0) { | |
1439 | ret = 3; | |
1440 | error_report("Sector allocation test failed for %s", filename1); | |
1441 | goto out; | |
1442 | } | |
1443 | allocated1 = status1 & BDRV_BLOCK_ALLOCATED; | |
1444 | ||
1445 | status2 = bdrv_block_status_above(bs2, NULL, offset, | |
1446 | total_size2 - offset, &pnum2, NULL, | |
1447 | NULL); | |
1448 | if (status2 < 0) { | |
1449 | ret = 3; | |
1450 | error_report("Sector allocation test failed for %s", filename2); | |
1451 | goto out; | |
1452 | } | |
1453 | allocated2 = status2 & BDRV_BLOCK_ALLOCATED; | |
1454 | ||
1455 | assert(pnum1 && pnum2); | |
1456 | chunk = MIN(pnum1, pnum2); | |
1457 | ||
1458 | if (strict) { | |
1459 | if (status1 != status2) { | |
1460 | ret = 1; | |
1461 | qprintf(quiet, "Strict mode: Offset %" PRId64 | |
1462 | " block status mismatch!\n", offset); | |
1463 | goto out; | |
1464 | } | |
1465 | } | |
1466 | if ((status1 & BDRV_BLOCK_ZERO) && (status2 & BDRV_BLOCK_ZERO)) { | |
1467 | /* nothing to do */ | |
1468 | } else if (allocated1 == allocated2) { | |
1469 | if (allocated1) { | |
1470 | int64_t pnum; | |
1471 | ||
1472 | chunk = MIN(chunk, IO_BUF_SIZE); | |
1473 | ret = blk_pread(blk1, offset, buf1, chunk); | |
1474 | if (ret < 0) { | |
1475 | error_report("Error while reading offset %" PRId64 | |
1476 | " of %s: %s", | |
1477 | offset, filename1, strerror(-ret)); | |
1478 | ret = 4; | |
1479 | goto out; | |
1480 | } | |
1481 | ret = blk_pread(blk2, offset, buf2, chunk); | |
1482 | if (ret < 0) { | |
1483 | error_report("Error while reading offset %" PRId64 | |
1484 | " of %s: %s", | |
1485 | offset, filename2, strerror(-ret)); | |
1486 | ret = 4; | |
1487 | goto out; | |
1488 | } | |
1489 | ret = compare_buffers(buf1, buf2, chunk, &pnum); | |
1490 | if (ret || pnum != chunk) { | |
1491 | qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", | |
1492 | offset + (ret ? 0 : pnum)); | |
1493 | ret = 1; | |
1494 | goto out; | |
1495 | } | |
1496 | } | |
1497 | } else { | |
1498 | chunk = MIN(chunk, IO_BUF_SIZE); | |
1499 | if (allocated1) { | |
1500 | ret = check_empty_sectors(blk1, offset, chunk, | |
1501 | filename1, buf1, quiet); | |
1502 | } else { | |
1503 | ret = check_empty_sectors(blk2, offset, chunk, | |
1504 | filename2, buf1, quiet); | |
1505 | } | |
1506 | if (ret) { | |
1507 | goto out; | |
1508 | } | |
1509 | } | |
1510 | offset += chunk; | |
1511 | qemu_progress_print(((float) chunk / progress_base) * 100, 100); | |
1512 | } | |
1513 | ||
1514 | if (total_size1 != total_size2) { | |
1515 | BlockBackend *blk_over; | |
1516 | const char *filename_over; | |
1517 | ||
1518 | qprintf(quiet, "Warning: Image size mismatch!\n"); | |
1519 | if (total_size1 > total_size2) { | |
1520 | blk_over = blk1; | |
1521 | filename_over = filename1; | |
1522 | } else { | |
1523 | blk_over = blk2; | |
1524 | filename_over = filename2; | |
1525 | } | |
1526 | ||
1527 | while (offset < progress_base) { | |
1528 | ret = bdrv_block_status_above(blk_bs(blk_over), NULL, offset, | |
1529 | progress_base - offset, &chunk, | |
1530 | NULL, NULL); | |
1531 | if (ret < 0) { | |
1532 | ret = 3; | |
1533 | error_report("Sector allocation test failed for %s", | |
1534 | filename_over); | |
1535 | goto out; | |
1536 | ||
1537 | } | |
1538 | if (ret & BDRV_BLOCK_ALLOCATED && !(ret & BDRV_BLOCK_ZERO)) { | |
1539 | chunk = MIN(chunk, IO_BUF_SIZE); | |
1540 | ret = check_empty_sectors(blk_over, offset, chunk, | |
1541 | filename_over, buf1, quiet); | |
1542 | if (ret) { | |
1543 | goto out; | |
1544 | } | |
1545 | } | |
1546 | offset += chunk; | |
1547 | qemu_progress_print(((float) chunk / progress_base) * 100, 100); | |
1548 | } | |
1549 | } | |
1550 | ||
1551 | qprintf(quiet, "Images are identical.\n"); | |
1552 | ret = 0; | |
1553 | ||
1554 | out: | |
1555 | qemu_vfree(buf1); | |
1556 | qemu_vfree(buf2); | |
1557 | blk_unref(blk2); | |
1558 | out2: | |
1559 | blk_unref(blk1); | |
1560 | out3: | |
1561 | qemu_progress_end(); | |
1562 | out4: | |
1563 | return ret; | |
1564 | } | |
1565 | ||
1566 | enum ImgConvertBlockStatus { | |
1567 | BLK_DATA, | |
1568 | BLK_ZERO, | |
1569 | BLK_BACKING_FILE, | |
1570 | }; | |
1571 | ||
1572 | #define MAX_COROUTINES 16 | |
1573 | ||
1574 | typedef struct ImgConvertState { | |
1575 | BlockBackend **src; | |
1576 | int64_t *src_sectors; | |
1577 | int src_num; | |
1578 | int64_t total_sectors; | |
1579 | int64_t allocated_sectors; | |
1580 | int64_t allocated_done; | |
1581 | int64_t sector_num; | |
1582 | int64_t wr_offs; | |
1583 | enum ImgConvertBlockStatus status; | |
1584 | int64_t sector_next_status; | |
1585 | BlockBackend *target; | |
1586 | bool has_zero_init; | |
1587 | bool compressed; | |
1588 | bool unallocated_blocks_are_zero; | |
1589 | bool target_is_new; | |
1590 | bool target_has_backing; | |
1591 | int64_t target_backing_sectors; /* negative if unknown */ | |
1592 | bool wr_in_order; | |
1593 | bool copy_range; | |
1594 | bool salvage; | |
1595 | bool quiet; | |
1596 | int min_sparse; | |
1597 | int alignment; | |
1598 | size_t cluster_sectors; | |
1599 | size_t buf_sectors; | |
1600 | long num_coroutines; | |
1601 | int running_coroutines; | |
1602 | Coroutine *co[MAX_COROUTINES]; | |
1603 | int64_t wait_sector_num[MAX_COROUTINES]; | |
1604 | CoMutex lock; | |
1605 | int ret; | |
1606 | } ImgConvertState; | |
1607 | ||
1608 | static void convert_select_part(ImgConvertState *s, int64_t sector_num, | |
1609 | int *src_cur, int64_t *src_cur_offset) | |
1610 | { | |
1611 | *src_cur = 0; | |
1612 | *src_cur_offset = 0; | |
1613 | while (sector_num - *src_cur_offset >= s->src_sectors[*src_cur]) { | |
1614 | *src_cur_offset += s->src_sectors[*src_cur]; | |
1615 | (*src_cur)++; | |
1616 | assert(*src_cur < s->src_num); | |
1617 | } | |
1618 | } | |
1619 | ||
1620 | static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num) | |
1621 | { | |
1622 | int64_t src_cur_offset; | |
1623 | int ret, n, src_cur; | |
1624 | bool post_backing_zero = false; | |
1625 | ||
1626 | convert_select_part(s, sector_num, &src_cur, &src_cur_offset); | |
1627 | ||
1628 | assert(s->total_sectors > sector_num); | |
1629 | n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS); | |
1630 | ||
1631 | if (s->target_backing_sectors >= 0) { | |
1632 | if (sector_num >= s->target_backing_sectors) { | |
1633 | post_backing_zero = s->unallocated_blocks_are_zero; | |
1634 | } else if (sector_num + n > s->target_backing_sectors) { | |
1635 | /* Split requests around target_backing_sectors (because | |
1636 | * starting from there, zeros are handled differently) */ | |
1637 | n = s->target_backing_sectors - sector_num; | |
1638 | } | |
1639 | } | |
1640 | ||
1641 | if (s->sector_next_status <= sector_num) { | |
1642 | uint64_t offset = (sector_num - src_cur_offset) * BDRV_SECTOR_SIZE; | |
1643 | int64_t count; | |
1644 | ||
1645 | do { | |
1646 | count = n * BDRV_SECTOR_SIZE; | |
1647 | ||
1648 | if (s->target_has_backing) { | |
1649 | ret = bdrv_block_status(blk_bs(s->src[src_cur]), offset, | |
1650 | count, &count, NULL, NULL); | |
1651 | } else { | |
1652 | ret = bdrv_block_status_above(blk_bs(s->src[src_cur]), NULL, | |
1653 | offset, count, &count, NULL, | |
1654 | NULL); | |
1655 | } | |
1656 | ||
1657 | if (ret < 0) { | |
1658 | if (s->salvage) { | |
1659 | if (n == 1) { | |
1660 | if (!s->quiet) { | |
1661 | warn_report("error while reading block status at " | |
1662 | "offset %" PRIu64 ": %s", offset, | |
1663 | strerror(-ret)); | |
1664 | } | |
1665 | /* Just try to read the data, then */ | |
1666 | ret = BDRV_BLOCK_DATA; | |
1667 | count = BDRV_SECTOR_SIZE; | |
1668 | } else { | |
1669 | /* Retry on a shorter range */ | |
1670 | n = DIV_ROUND_UP(n, 4); | |
1671 | } | |
1672 | } else { | |
1673 | error_report("error while reading block status at offset " | |
1674 | "%" PRIu64 ": %s", offset, strerror(-ret)); | |
1675 | return ret; | |
1676 | } | |
1677 | } | |
1678 | } while (ret < 0); | |
1679 | ||
1680 | n = DIV_ROUND_UP(count, BDRV_SECTOR_SIZE); | |
1681 | ||
1682 | if (ret & BDRV_BLOCK_ZERO) { | |
1683 | s->status = post_backing_zero ? BLK_BACKING_FILE : BLK_ZERO; | |
1684 | } else if (ret & BDRV_BLOCK_DATA) { | |
1685 | s->status = BLK_DATA; | |
1686 | } else { | |
1687 | s->status = s->target_has_backing ? BLK_BACKING_FILE : BLK_DATA; | |
1688 | } | |
1689 | ||
1690 | s->sector_next_status = sector_num + n; | |
1691 | } | |
1692 | ||
1693 | n = MIN(n, s->sector_next_status - sector_num); | |
1694 | if (s->status == BLK_DATA) { | |
1695 | n = MIN(n, s->buf_sectors); | |
1696 | } | |
1697 | ||
1698 | /* We need to write complete clusters for compressed images, so if an | |
1699 | * unallocated area is shorter than that, we must consider the whole | |
1700 | * cluster allocated. */ | |
1701 | if (s->compressed) { | |
1702 | if (n < s->cluster_sectors) { | |
1703 | n = MIN(s->cluster_sectors, s->total_sectors - sector_num); | |
1704 | s->status = BLK_DATA; | |
1705 | } else { | |
1706 | n = QEMU_ALIGN_DOWN(n, s->cluster_sectors); | |
1707 | } | |
1708 | } | |
1709 | ||
1710 | return n; | |
1711 | } | |
1712 | ||
1713 | static int coroutine_fn convert_co_read(ImgConvertState *s, int64_t sector_num, | |
1714 | int nb_sectors, uint8_t *buf) | |
1715 | { | |
1716 | uint64_t single_read_until = 0; | |
1717 | int n, ret; | |
1718 | ||
1719 | assert(nb_sectors <= s->buf_sectors); | |
1720 | while (nb_sectors > 0) { | |
1721 | BlockBackend *blk; | |
1722 | int src_cur; | |
1723 | int64_t bs_sectors, src_cur_offset; | |
1724 | uint64_t offset; | |
1725 | ||
1726 | /* In the case of compression with multiple source files, we can get a | |
1727 | * nb_sectors that spreads into the next part. So we must be able to | |
1728 | * read across multiple BDSes for one convert_read() call. */ | |
1729 | convert_select_part(s, sector_num, &src_cur, &src_cur_offset); | |
1730 | blk = s->src[src_cur]; | |
1731 | bs_sectors = s->src_sectors[src_cur]; | |
1732 | ||
1733 | offset = (sector_num - src_cur_offset) << BDRV_SECTOR_BITS; | |
1734 | ||
1735 | n = MIN(nb_sectors, bs_sectors - (sector_num - src_cur_offset)); | |
1736 | if (single_read_until > offset) { | |
1737 | n = 1; | |
1738 | } | |
1739 | ||
1740 | ret = blk_co_pread(blk, offset, n << BDRV_SECTOR_BITS, buf, 0); | |
1741 | if (ret < 0) { | |
1742 | if (s->salvage) { | |
1743 | if (n > 1) { | |
1744 | single_read_until = offset + (n << BDRV_SECTOR_BITS); | |
1745 | continue; | |
1746 | } else { | |
1747 | if (!s->quiet) { | |
1748 | warn_report("error while reading offset %" PRIu64 | |
1749 | ": %s", offset, strerror(-ret)); | |
1750 | } | |
1751 | memset(buf, 0, BDRV_SECTOR_SIZE); | |
1752 | } | |
1753 | } else { | |
1754 | return ret; | |
1755 | } | |
1756 | } | |
1757 | ||
1758 | sector_num += n; | |
1759 | nb_sectors -= n; | |
1760 | buf += n * BDRV_SECTOR_SIZE; | |
1761 | } | |
1762 | ||
1763 | return 0; | |
1764 | } | |
1765 | ||
1766 | ||
1767 | static int coroutine_fn convert_co_write(ImgConvertState *s, int64_t sector_num, | |
1768 | int nb_sectors, uint8_t *buf, | |
1769 | enum ImgConvertBlockStatus status) | |
1770 | { | |
1771 | int ret; | |
1772 | ||
1773 | while (nb_sectors > 0) { | |
1774 | int n = nb_sectors; | |
1775 | BdrvRequestFlags flags = s->compressed ? BDRV_REQ_WRITE_COMPRESSED : 0; | |
1776 | ||
1777 | switch (status) { | |
1778 | case BLK_BACKING_FILE: | |
1779 | /* If we have a backing file, leave clusters unallocated that are | |
1780 | * unallocated in the source image, so that the backing file is | |
1781 | * visible at the respective offset. */ | |
1782 | assert(s->target_has_backing); | |
1783 | break; | |
1784 | ||
1785 | case BLK_DATA: | |
1786 | /* If we're told to keep the target fully allocated (-S 0) or there | |
1787 | * is real non-zero data, we must write it. Otherwise we can treat | |
1788 | * it as zero sectors. | |
1789 | * Compressed clusters need to be written as a whole, so in that | |
1790 | * case we can only save the write if the buffer is completely | |
1791 | * zeroed. */ | |
1792 | if (!s->min_sparse || | |
1793 | (!s->compressed && | |
1794 | is_allocated_sectors_min(buf, n, &n, s->min_sparse, | |
1795 | sector_num, s->alignment)) || | |
1796 | (s->compressed && | |
1797 | !buffer_is_zero(buf, n * BDRV_SECTOR_SIZE))) | |
1798 | { | |
1799 | ret = blk_co_pwrite(s->target, sector_num << BDRV_SECTOR_BITS, | |
1800 | n << BDRV_SECTOR_BITS, buf, flags); | |
1801 | if (ret < 0) { | |
1802 | return ret; | |
1803 | } | |
1804 | break; | |
1805 | } | |
1806 | /* fall-through */ | |
1807 | ||
1808 | case BLK_ZERO: | |
1809 | if (s->has_zero_init) { | |
1810 | assert(!s->target_has_backing); | |
1811 | break; | |
1812 | } | |
1813 | ret = blk_co_pwrite_zeroes(s->target, | |
1814 | sector_num << BDRV_SECTOR_BITS, | |
1815 | n << BDRV_SECTOR_BITS, | |
1816 | BDRV_REQ_MAY_UNMAP); | |
1817 | if (ret < 0) { | |
1818 | return ret; | |
1819 | } | |
1820 | break; | |
1821 | } | |
1822 | ||
1823 | sector_num += n; | |
1824 | nb_sectors -= n; | |
1825 | buf += n * BDRV_SECTOR_SIZE; | |
1826 | } | |
1827 | ||
1828 | return 0; | |
1829 | } | |
1830 | ||
1831 | static int coroutine_fn convert_co_copy_range(ImgConvertState *s, int64_t sector_num, | |
1832 | int nb_sectors) | |
1833 | { | |
1834 | int n, ret; | |
1835 | ||
1836 | while (nb_sectors > 0) { | |
1837 | BlockBackend *blk; | |
1838 | int src_cur; | |
1839 | int64_t bs_sectors, src_cur_offset; | |
1840 | int64_t offset; | |
1841 | ||
1842 | convert_select_part(s, sector_num, &src_cur, &src_cur_offset); | |
1843 | offset = (sector_num - src_cur_offset) << BDRV_SECTOR_BITS; | |
1844 | blk = s->src[src_cur]; | |
1845 | bs_sectors = s->src_sectors[src_cur]; | |
1846 | ||
1847 | n = MIN(nb_sectors, bs_sectors - (sector_num - src_cur_offset)); | |
1848 | ||
1849 | ret = blk_co_copy_range(blk, offset, s->target, | |
1850 | sector_num << BDRV_SECTOR_BITS, | |
1851 | n << BDRV_SECTOR_BITS, 0, 0); | |
1852 | if (ret < 0) { | |
1853 | return ret; | |
1854 | } | |
1855 | ||
1856 | sector_num += n; | |
1857 | nb_sectors -= n; | |
1858 | } | |
1859 | return 0; | |
1860 | } | |
1861 | ||
1862 | static void coroutine_fn convert_co_do_copy(void *opaque) | |
1863 | { | |
1864 | ImgConvertState *s = opaque; | |
1865 | uint8_t *buf = NULL; | |
1866 | int ret, i; | |
1867 | int index = -1; | |
1868 | ||
1869 | for (i = 0; i < s->num_coroutines; i++) { | |
1870 | if (s->co[i] == qemu_coroutine_self()) { | |
1871 | index = i; | |
1872 | break; | |
1873 | } | |
1874 | } | |
1875 | assert(index >= 0); | |
1876 | ||
1877 | s->running_coroutines++; | |
1878 | buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE); | |
1879 | ||
1880 | while (1) { | |
1881 | int n; | |
1882 | int64_t sector_num; | |
1883 | enum ImgConvertBlockStatus status; | |
1884 | bool copy_range; | |
1885 | ||
1886 | qemu_co_mutex_lock(&s->lock); | |
1887 | if (s->ret != -EINPROGRESS || s->sector_num >= s->total_sectors) { | |
1888 | qemu_co_mutex_unlock(&s->lock); | |
1889 | break; | |
1890 | } | |
1891 | n = convert_iteration_sectors(s, s->sector_num); | |
1892 | if (n < 0) { | |
1893 | qemu_co_mutex_unlock(&s->lock); | |
1894 | s->ret = n; | |
1895 | break; | |
1896 | } | |
1897 | /* save current sector and allocation status to local variables */ | |
1898 | sector_num = s->sector_num; | |
1899 | status = s->status; | |
1900 | if (!s->min_sparse && s->status == BLK_ZERO) { | |
1901 | n = MIN(n, s->buf_sectors); | |
1902 | } | |
1903 | /* increment global sector counter so that other coroutines can | |
1904 | * already continue reading beyond this request */ | |
1905 | s->sector_num += n; | |
1906 | qemu_co_mutex_unlock(&s->lock); | |
1907 | ||
1908 | if (status == BLK_DATA || (!s->min_sparse && status == BLK_ZERO)) { | |
1909 | s->allocated_done += n; | |
1910 | qemu_progress_print(100.0 * s->allocated_done / | |
1911 | s->allocated_sectors, 0); | |
1912 | } | |
1913 | ||
1914 | retry: | |
1915 | copy_range = s->copy_range && s->status == BLK_DATA; | |
1916 | if (status == BLK_DATA && !copy_range) { | |
1917 | ret = convert_co_read(s, sector_num, n, buf); | |
1918 | if (ret < 0) { | |
1919 | error_report("error while reading sector %" PRId64 | |
1920 | ": %s", sector_num, strerror(-ret)); | |
1921 | s->ret = ret; | |
1922 | } | |
1923 | } else if (!s->min_sparse && status == BLK_ZERO) { | |
1924 | status = BLK_DATA; | |
1925 | memset(buf, 0x00, n * BDRV_SECTOR_SIZE); | |
1926 | } | |
1927 | ||
1928 | if (s->wr_in_order) { | |
1929 | /* keep writes in order */ | |
1930 | while (s->wr_offs != sector_num && s->ret == -EINPROGRESS) { | |
1931 | s->wait_sector_num[index] = sector_num; | |
1932 | qemu_coroutine_yield(); | |
1933 | } | |
1934 | s->wait_sector_num[index] = -1; | |
1935 | } | |
1936 | ||
1937 | if (s->ret == -EINPROGRESS) { | |
1938 | if (copy_range) { | |
1939 | ret = convert_co_copy_range(s, sector_num, n); | |
1940 | if (ret) { | |
1941 | s->copy_range = false; | |
1942 | goto retry; | |
1943 | } | |
1944 | } else { | |
1945 | ret = convert_co_write(s, sector_num, n, buf, status); | |
1946 | } | |
1947 | if (ret < 0) { | |
1948 | error_report("error while writing sector %" PRId64 | |
1949 | ": %s", sector_num, strerror(-ret)); | |
1950 | s->ret = ret; | |
1951 | } | |
1952 | } | |
1953 | ||
1954 | if (s->wr_in_order) { | |
1955 | /* reenter the coroutine that might have waited | |
1956 | * for this write to complete */ | |
1957 | s->wr_offs = sector_num + n; | |
1958 | for (i = 0; i < s->num_coroutines; i++) { | |
1959 | if (s->co[i] && s->wait_sector_num[i] == s->wr_offs) { | |
1960 | /* | |
1961 | * A -> B -> A cannot occur because A has | |
1962 | * s->wait_sector_num[i] == -1 during A -> B. Therefore | |
1963 | * B will never enter A during this time window. | |
1964 | */ | |
1965 | qemu_coroutine_enter(s->co[i]); | |
1966 | break; | |
1967 | } | |
1968 | } | |
1969 | } | |
1970 | } | |
1971 | ||
1972 | qemu_vfree(buf); | |
1973 | s->co[index] = NULL; | |
1974 | s->running_coroutines--; | |
1975 | if (!s->running_coroutines && s->ret == -EINPROGRESS) { | |
1976 | /* the convert job finished successfully */ | |
1977 | s->ret = 0; | |
1978 | } | |
1979 | } | |
1980 | ||
1981 | static int convert_do_copy(ImgConvertState *s) | |
1982 | { | |
1983 | int ret, i, n; | |
1984 | int64_t sector_num = 0; | |
1985 | ||
1986 | /* Check whether we have zero initialisation or can get it efficiently */ | |
1987 | if (s->target_is_new && s->min_sparse && !s->target_has_backing) { | |
1988 | s->has_zero_init = bdrv_has_zero_init(blk_bs(s->target)); | |
1989 | } else { | |
1990 | s->has_zero_init = false; | |
1991 | } | |
1992 | ||
1993 | if (!s->has_zero_init && !s->target_has_backing && | |
1994 | bdrv_can_write_zeroes_with_unmap(blk_bs(s->target))) | |
1995 | { | |
1996 | ret = blk_make_zero(s->target, BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK); | |
1997 | if (ret == 0) { | |
1998 | s->has_zero_init = true; | |
1999 | } | |
2000 | } | |
2001 | ||
2002 | /* Allocate buffer for copied data. For compressed images, only one cluster | |
2003 | * can be copied at a time. */ | |
2004 | if (s->compressed) { | |
2005 | if (s->cluster_sectors <= 0 || s->cluster_sectors > s->buf_sectors) { | |
2006 | error_report("invalid cluster size"); | |
2007 | return -EINVAL; | |
2008 | } | |
2009 | s->buf_sectors = s->cluster_sectors; | |
2010 | } | |
2011 | ||
2012 | while (sector_num < s->total_sectors) { | |
2013 | n = convert_iteration_sectors(s, sector_num); | |
2014 | if (n < 0) { | |
2015 | return n; | |
2016 | } | |
2017 | if (s->status == BLK_DATA || (!s->min_sparse && s->status == BLK_ZERO)) | |
2018 | { | |
2019 | s->allocated_sectors += n; | |
2020 | } | |
2021 | sector_num += n; | |
2022 | } | |
2023 | ||
2024 | /* Do the copy */ | |
2025 | s->sector_next_status = 0; | |
2026 | s->ret = -EINPROGRESS; | |
2027 | ||
2028 | qemu_co_mutex_init(&s->lock); | |
2029 | for (i = 0; i < s->num_coroutines; i++) { | |
2030 | s->co[i] = qemu_coroutine_create(convert_co_do_copy, s); | |
2031 | s->wait_sector_num[i] = -1; | |
2032 | qemu_coroutine_enter(s->co[i]); | |
2033 | } | |
2034 | ||
2035 | while (s->running_coroutines) { | |
2036 | main_loop_wait(false); | |
2037 | } | |
2038 | ||
2039 | if (s->compressed && !s->ret) { | |
2040 | /* signal EOF to align */ | |
2041 | ret = blk_pwrite_compressed(s->target, 0, NULL, 0); | |
2042 | if (ret < 0) { | |
2043 | return ret; | |
2044 | } | |
2045 | } | |
2046 | ||
2047 | return s->ret; | |
2048 | } | |
2049 | ||
2050 | #define MAX_BUF_SECTORS 32768 | |
2051 | ||
2052 | static int img_convert(int argc, char **argv) | |
2053 | { | |
2054 | int c, bs_i, flags, src_flags = 0; | |
2055 | const char *fmt = NULL, *out_fmt = NULL, *cache = "unsafe", | |
2056 | *src_cache = BDRV_DEFAULT_CACHE, *out_baseimg = NULL, | |
2057 | *out_filename, *out_baseimg_param, *snapshot_name = NULL; | |
2058 | BlockDriver *drv = NULL, *proto_drv = NULL; | |
2059 | BlockDriverInfo bdi; | |
2060 | BlockDriverState *out_bs; | |
2061 | QemuOpts *opts = NULL, *sn_opts = NULL; | |
2062 | QemuOptsList *create_opts = NULL; | |
2063 | QDict *open_opts = NULL; | |
2064 | char *options = NULL; | |
2065 | Error *local_err = NULL; | |
2066 | bool writethrough, src_writethrough, image_opts = false, | |
2067 | skip_create = false, progress = false, tgt_image_opts = false; | |
2068 | int64_t ret = -EINVAL; | |
2069 | bool force_share = false; | |
2070 | bool explict_min_sparse = false; | |
2071 | ||
2072 | ImgConvertState s = (ImgConvertState) { | |
2073 | /* Need at least 4k of zeros for sparse detection */ | |
2074 | .min_sparse = 8, | |
2075 | .copy_range = false, | |
2076 | .buf_sectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE, | |
2077 | .wr_in_order = true, | |
2078 | .num_coroutines = 8, | |
2079 | }; | |
2080 | ||
2081 | for(;;) { | |
2082 | static const struct option long_options[] = { | |
2083 | {"help", no_argument, 0, 'h'}, | |
2084 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2085 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2086 | {"force-share", no_argument, 0, 'U'}, | |
2087 | {"target-image-opts", no_argument, 0, OPTION_TARGET_IMAGE_OPTS}, | |
2088 | {"salvage", no_argument, 0, OPTION_SALVAGE}, | |
2089 | {0, 0, 0, 0} | |
2090 | }; | |
2091 | c = getopt_long(argc, argv, ":hf:O:B:Cco:l:S:pt:T:qnm:WU", | |
2092 | long_options, NULL); | |
2093 | if (c == -1) { | |
2094 | break; | |
2095 | } | |
2096 | switch(c) { | |
2097 | case ':': | |
2098 | missing_argument(argv[optind - 1]); | |
2099 | break; | |
2100 | case '?': | |
2101 | unrecognized_option(argv[optind - 1]); | |
2102 | break; | |
2103 | case 'h': | |
2104 | help(); | |
2105 | break; | |
2106 | case 'f': | |
2107 | fmt = optarg; | |
2108 | break; | |
2109 | case 'O': | |
2110 | out_fmt = optarg; | |
2111 | break; | |
2112 | case 'B': | |
2113 | out_baseimg = optarg; | |
2114 | break; | |
2115 | case 'C': | |
2116 | s.copy_range = true; | |
2117 | break; | |
2118 | case 'c': | |
2119 | s.compressed = true; | |
2120 | break; | |
2121 | case 'o': | |
2122 | if (!is_valid_option_list(optarg)) { | |
2123 | error_report("Invalid option list: %s", optarg); | |
2124 | goto fail_getopt; | |
2125 | } | |
2126 | if (!options) { | |
2127 | options = g_strdup(optarg); | |
2128 | } else { | |
2129 | char *old_options = options; | |
2130 | options = g_strdup_printf("%s,%s", options, optarg); | |
2131 | g_free(old_options); | |
2132 | } | |
2133 | break; | |
2134 | case 'l': | |
2135 | if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { | |
2136 | sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, | |
2137 | optarg, false); | |
2138 | if (!sn_opts) { | |
2139 | error_report("Failed in parsing snapshot param '%s'", | |
2140 | optarg); | |
2141 | goto fail_getopt; | |
2142 | } | |
2143 | } else { | |
2144 | snapshot_name = optarg; | |
2145 | } | |
2146 | break; | |
2147 | case 'S': | |
2148 | { | |
2149 | int64_t sval; | |
2150 | ||
2151 | sval = cvtnum(optarg); | |
2152 | if (sval < 0 || !QEMU_IS_ALIGNED(sval, BDRV_SECTOR_SIZE) || | |
2153 | sval / BDRV_SECTOR_SIZE > MAX_BUF_SECTORS) { | |
2154 | error_report("Invalid buffer size for sparse output specified. " | |
2155 | "Valid sizes are multiples of %llu up to %llu. Select " | |
2156 | "0 to disable sparse detection (fully allocates output).", | |
2157 | BDRV_SECTOR_SIZE, MAX_BUF_SECTORS * BDRV_SECTOR_SIZE); | |
2158 | goto fail_getopt; | |
2159 | } | |
2160 | ||
2161 | s.min_sparse = sval / BDRV_SECTOR_SIZE; | |
2162 | explict_min_sparse = true; | |
2163 | break; | |
2164 | } | |
2165 | case 'p': | |
2166 | progress = true; | |
2167 | break; | |
2168 | case 't': | |
2169 | cache = optarg; | |
2170 | break; | |
2171 | case 'T': | |
2172 | src_cache = optarg; | |
2173 | break; | |
2174 | case 'q': | |
2175 | s.quiet = true; | |
2176 | break; | |
2177 | case 'n': | |
2178 | skip_create = true; | |
2179 | break; | |
2180 | case 'm': | |
2181 | if (qemu_strtol(optarg, NULL, 0, &s.num_coroutines) || | |
2182 | s.num_coroutines < 1 || s.num_coroutines > MAX_COROUTINES) { | |
2183 | error_report("Invalid number of coroutines. Allowed number of" | |
2184 | " coroutines is between 1 and %d", MAX_COROUTINES); | |
2185 | goto fail_getopt; | |
2186 | } | |
2187 | break; | |
2188 | case 'W': | |
2189 | s.wr_in_order = false; | |
2190 | break; | |
2191 | case 'U': | |
2192 | force_share = true; | |
2193 | break; | |
2194 | case OPTION_OBJECT: { | |
2195 | QemuOpts *object_opts; | |
2196 | object_opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
2197 | optarg, true); | |
2198 | if (!object_opts) { | |
2199 | goto fail_getopt; | |
2200 | } | |
2201 | break; | |
2202 | } | |
2203 | case OPTION_IMAGE_OPTS: | |
2204 | image_opts = true; | |
2205 | break; | |
2206 | case OPTION_SALVAGE: | |
2207 | s.salvage = true; | |
2208 | break; | |
2209 | case OPTION_TARGET_IMAGE_OPTS: | |
2210 | tgt_image_opts = true; | |
2211 | break; | |
2212 | } | |
2213 | } | |
2214 | ||
2215 | if (!out_fmt && !tgt_image_opts) { | |
2216 | out_fmt = "raw"; | |
2217 | } | |
2218 | ||
2219 | if (qemu_opts_foreach(&qemu_object_opts, | |
2220 | user_creatable_add_opts_foreach, | |
2221 | qemu_img_object_print_help, &error_fatal)) { | |
2222 | goto fail_getopt; | |
2223 | } | |
2224 | ||
2225 | if (s.compressed && s.copy_range) { | |
2226 | error_report("Cannot enable copy offloading when -c is used"); | |
2227 | goto fail_getopt; | |
2228 | } | |
2229 | ||
2230 | if (explict_min_sparse && s.copy_range) { | |
2231 | error_report("Cannot enable copy offloading when -S is used"); | |
2232 | goto fail_getopt; | |
2233 | } | |
2234 | ||
2235 | if (s.copy_range && s.salvage) { | |
2236 | error_report("Cannot use copy offloading in salvaging mode"); | |
2237 | goto fail_getopt; | |
2238 | } | |
2239 | ||
2240 | if (tgt_image_opts && !skip_create) { | |
2241 | error_report("--target-image-opts requires use of -n flag"); | |
2242 | goto fail_getopt; | |
2243 | } | |
2244 | ||
2245 | if (skip_create && options) { | |
2246 | warn_report("-o has no effect when skipping image creation"); | |
2247 | warn_report("This will become an error in future QEMU versions."); | |
2248 | } | |
2249 | ||
2250 | s.src_num = argc - optind - 1; | |
2251 | out_filename = s.src_num >= 1 ? argv[argc - 1] : NULL; | |
2252 | ||
2253 | if (options && has_help_option(options)) { | |
2254 | if (out_fmt) { | |
2255 | ret = print_block_option_help(out_filename, out_fmt); | |
2256 | goto fail_getopt; | |
2257 | } else { | |
2258 | error_report("Option help requires a format be specified"); | |
2259 | goto fail_getopt; | |
2260 | } | |
2261 | } | |
2262 | ||
2263 | if (s.src_num < 1) { | |
2264 | error_report("Must specify image file name"); | |
2265 | goto fail_getopt; | |
2266 | } | |
2267 | ||
2268 | ||
2269 | /* ret is still -EINVAL until here */ | |
2270 | ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough); | |
2271 | if (ret < 0) { | |
2272 | error_report("Invalid source cache option: %s", src_cache); | |
2273 | goto fail_getopt; | |
2274 | } | |
2275 | ||
2276 | /* Initialize before goto out */ | |
2277 | if (s.quiet) { | |
2278 | progress = false; | |
2279 | } | |
2280 | qemu_progress_init(progress, 1.0); | |
2281 | qemu_progress_print(0, 100); | |
2282 | ||
2283 | s.src = g_new0(BlockBackend *, s.src_num); | |
2284 | s.src_sectors = g_new(int64_t, s.src_num); | |
2285 | ||
2286 | for (bs_i = 0; bs_i < s.src_num; bs_i++) { | |
2287 | s.src[bs_i] = img_open(image_opts, argv[optind + bs_i], | |
2288 | fmt, src_flags, src_writethrough, s.quiet, | |
2289 | force_share); | |
2290 | if (!s.src[bs_i]) { | |
2291 | ret = -1; | |
2292 | goto out; | |
2293 | } | |
2294 | s.src_sectors[bs_i] = blk_nb_sectors(s.src[bs_i]); | |
2295 | if (s.src_sectors[bs_i] < 0) { | |
2296 | error_report("Could not get size of %s: %s", | |
2297 | argv[optind + bs_i], strerror(-s.src_sectors[bs_i])); | |
2298 | ret = -1; | |
2299 | goto out; | |
2300 | } | |
2301 | s.total_sectors += s.src_sectors[bs_i]; | |
2302 | } | |
2303 | ||
2304 | if (sn_opts) { | |
2305 | bdrv_snapshot_load_tmp(blk_bs(s.src[0]), | |
2306 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), | |
2307 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), | |
2308 | &local_err); | |
2309 | } else if (snapshot_name != NULL) { | |
2310 | if (s.src_num > 1) { | |
2311 | error_report("No support for concatenating multiple snapshot"); | |
2312 | ret = -1; | |
2313 | goto out; | |
2314 | } | |
2315 | ||
2316 | bdrv_snapshot_load_tmp_by_id_or_name(blk_bs(s.src[0]), snapshot_name, | |
2317 | &local_err); | |
2318 | } | |
2319 | if (local_err) { | |
2320 | error_reportf_err(local_err, "Failed to load snapshot: "); | |
2321 | ret = -1; | |
2322 | goto out; | |
2323 | } | |
2324 | ||
2325 | if (!skip_create) { | |
2326 | /* Find driver and parse its options */ | |
2327 | drv = bdrv_find_format(out_fmt); | |
2328 | if (!drv) { | |
2329 | error_report("Unknown file format '%s'", out_fmt); | |
2330 | ret = -1; | |
2331 | goto out; | |
2332 | } | |
2333 | ||
2334 | proto_drv = bdrv_find_protocol(out_filename, true, &local_err); | |
2335 | if (!proto_drv) { | |
2336 | error_report_err(local_err); | |
2337 | ret = -1; | |
2338 | goto out; | |
2339 | } | |
2340 | ||
2341 | if (!drv->create_opts) { | |
2342 | error_report("Format driver '%s' does not support image creation", | |
2343 | drv->format_name); | |
2344 | ret = -1; | |
2345 | goto out; | |
2346 | } | |
2347 | ||
2348 | if (!proto_drv->create_opts) { | |
2349 | error_report("Protocol driver '%s' does not support image creation", | |
2350 | proto_drv->format_name); | |
2351 | ret = -1; | |
2352 | goto out; | |
2353 | } | |
2354 | ||
2355 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
2356 | create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); | |
2357 | ||
2358 | opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); | |
2359 | if (options) { | |
2360 | qemu_opts_do_parse(opts, options, NULL, &local_err); | |
2361 | if (local_err) { | |
2362 | error_report_err(local_err); | |
2363 | ret = -1; | |
2364 | goto out; | |
2365 | } | |
2366 | } | |
2367 | ||
2368 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, s.total_sectors * 512, | |
2369 | &error_abort); | |
2370 | ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL); | |
2371 | if (ret < 0) { | |
2372 | goto out; | |
2373 | } | |
2374 | } | |
2375 | ||
2376 | /* Get backing file name if -o backing_file was used */ | |
2377 | out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); | |
2378 | if (out_baseimg_param) { | |
2379 | out_baseimg = out_baseimg_param; | |
2380 | } | |
2381 | s.target_has_backing = (bool) out_baseimg; | |
2382 | ||
2383 | if (s.src_num > 1 && out_baseimg) { | |
2384 | error_report("Having a backing file for the target makes no sense when " | |
2385 | "concatenating multiple input images"); | |
2386 | ret = -1; | |
2387 | goto out; | |
2388 | } | |
2389 | ||
2390 | /* Check if compression is supported */ | |
2391 | if (s.compressed) { | |
2392 | bool encryption = | |
2393 | qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); | |
2394 | const char *encryptfmt = | |
2395 | qemu_opt_get(opts, BLOCK_OPT_ENCRYPT_FORMAT); | |
2396 | const char *preallocation = | |
2397 | qemu_opt_get(opts, BLOCK_OPT_PREALLOC); | |
2398 | ||
2399 | if (drv && !block_driver_can_compress(drv)) { | |
2400 | error_report("Compression not supported for this file format"); | |
2401 | ret = -1; | |
2402 | goto out; | |
2403 | } | |
2404 | ||
2405 | if (encryption || encryptfmt) { | |
2406 | error_report("Compression and encryption not supported at " | |
2407 | "the same time"); | |
2408 | ret = -1; | |
2409 | goto out; | |
2410 | } | |
2411 | ||
2412 | if (preallocation | |
2413 | && strcmp(preallocation, "off")) | |
2414 | { | |
2415 | error_report("Compression and preallocation not supported at " | |
2416 | "the same time"); | |
2417 | ret = -1; | |
2418 | goto out; | |
2419 | } | |
2420 | } | |
2421 | ||
2422 | /* | |
2423 | * The later open call will need any decryption secrets, and | |
2424 | * bdrv_create() will purge "opts", so extract them now before | |
2425 | * they are lost. | |
2426 | */ | |
2427 | if (!skip_create) { | |
2428 | open_opts = qdict_new(); | |
2429 | qemu_opt_foreach(opts, img_add_key_secrets, open_opts, &error_abort); | |
2430 | } | |
2431 | ||
2432 | if (!skip_create) { | |
2433 | /* Create the new image */ | |
2434 | ret = bdrv_create(drv, out_filename, opts, &local_err); | |
2435 | if (ret < 0) { | |
2436 | error_reportf_err(local_err, "%s: error while converting %s: ", | |
2437 | out_filename, out_fmt); | |
2438 | goto out; | |
2439 | } | |
2440 | } | |
2441 | ||
2442 | s.target_is_new = !skip_create; | |
2443 | ||
2444 | flags = s.min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; | |
2445 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
2446 | if (ret < 0) { | |
2447 | error_report("Invalid cache option: %s", cache); | |
2448 | goto out; | |
2449 | } | |
2450 | ||
2451 | if (skip_create) { | |
2452 | s.target = img_open(tgt_image_opts, out_filename, out_fmt, | |
2453 | flags, writethrough, s.quiet, false); | |
2454 | } else { | |
2455 | /* TODO ultimately we should allow --target-image-opts | |
2456 | * to be used even when -n is not given. | |
2457 | * That has to wait for bdrv_create to be improved | |
2458 | * to allow filenames in option syntax | |
2459 | */ | |
2460 | s.target = img_open_file(out_filename, open_opts, out_fmt, | |
2461 | flags, writethrough, s.quiet, false); | |
2462 | open_opts = NULL; /* blk_new_open will have freed it */ | |
2463 | } | |
2464 | if (!s.target) { | |
2465 | ret = -1; | |
2466 | goto out; | |
2467 | } | |
2468 | out_bs = blk_bs(s.target); | |
2469 | ||
2470 | if (s.compressed && !block_driver_can_compress(out_bs->drv)) { | |
2471 | error_report("Compression not supported for this file format"); | |
2472 | ret = -1; | |
2473 | goto out; | |
2474 | } | |
2475 | ||
2476 | /* increase bufsectors from the default 4096 (2M) if opt_transfer | |
2477 | * or discard_alignment of the out_bs is greater. Limit to | |
2478 | * MAX_BUF_SECTORS as maximum which is currently 32768 (16MB). */ | |
2479 | s.buf_sectors = MIN(MAX_BUF_SECTORS, | |
2480 | MAX(s.buf_sectors, | |
2481 | MAX(out_bs->bl.opt_transfer >> BDRV_SECTOR_BITS, | |
2482 | out_bs->bl.pdiscard_alignment >> | |
2483 | BDRV_SECTOR_BITS))); | |
2484 | ||
2485 | /* try to align the write requests to the destination to avoid unnecessary | |
2486 | * RMW cycles. */ | |
2487 | s.alignment = MAX(pow2floor(s.min_sparse), | |
2488 | DIV_ROUND_UP(out_bs->bl.request_alignment, | |
2489 | BDRV_SECTOR_SIZE)); | |
2490 | assert(is_power_of_2(s.alignment)); | |
2491 | ||
2492 | if (skip_create) { | |
2493 | int64_t output_sectors = blk_nb_sectors(s.target); | |
2494 | if (output_sectors < 0) { | |
2495 | error_report("unable to get output image length: %s", | |
2496 | strerror(-output_sectors)); | |
2497 | ret = -1; | |
2498 | goto out; | |
2499 | } else if (output_sectors < s.total_sectors) { | |
2500 | error_report("output file is smaller than input file"); | |
2501 | ret = -1; | |
2502 | goto out; | |
2503 | } | |
2504 | } | |
2505 | ||
2506 | if (s.target_has_backing) { | |
2507 | /* Errors are treated as "backing length unknown" (which means | |
2508 | * s.target_backing_sectors has to be negative, which it will | |
2509 | * be automatically). The backing file length is used only | |
2510 | * for optimizations, so such a case is not fatal. */ | |
2511 | s.target_backing_sectors = bdrv_nb_sectors(out_bs->backing->bs); | |
2512 | } else { | |
2513 | s.target_backing_sectors = -1; | |
2514 | } | |
2515 | ||
2516 | ret = bdrv_get_info(out_bs, &bdi); | |
2517 | if (ret < 0) { | |
2518 | if (s.compressed) { | |
2519 | error_report("could not get block driver info"); | |
2520 | goto out; | |
2521 | } | |
2522 | } else { | |
2523 | s.compressed = s.compressed || bdi.needs_compressed_writes; | |
2524 | s.cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; | |
2525 | s.unallocated_blocks_are_zero = bdi.unallocated_blocks_are_zero; | |
2526 | } | |
2527 | ||
2528 | ret = convert_do_copy(&s); | |
2529 | out: | |
2530 | if (!ret) { | |
2531 | qemu_progress_print(100, 0); | |
2532 | } | |
2533 | qemu_progress_end(); | |
2534 | qemu_opts_del(opts); | |
2535 | qemu_opts_free(create_opts); | |
2536 | qemu_opts_del(sn_opts); | |
2537 | qobject_unref(open_opts); | |
2538 | blk_unref(s.target); | |
2539 | if (s.src) { | |
2540 | for (bs_i = 0; bs_i < s.src_num; bs_i++) { | |
2541 | blk_unref(s.src[bs_i]); | |
2542 | } | |
2543 | g_free(s.src); | |
2544 | } | |
2545 | g_free(s.src_sectors); | |
2546 | fail_getopt: | |
2547 | g_free(options); | |
2548 | ||
2549 | return !!ret; | |
2550 | } | |
2551 | ||
2552 | ||
2553 | static void dump_snapshots(BlockDriverState *bs) | |
2554 | { | |
2555 | QEMUSnapshotInfo *sn_tab, *sn; | |
2556 | int nb_sns, i; | |
2557 | ||
2558 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2559 | if (nb_sns <= 0) | |
2560 | return; | |
2561 | printf("Snapshot list:\n"); | |
2562 | bdrv_snapshot_dump(NULL); | |
2563 | printf("\n"); | |
2564 | for(i = 0; i < nb_sns; i++) { | |
2565 | sn = &sn_tab[i]; | |
2566 | bdrv_snapshot_dump(sn); | |
2567 | printf("\n"); | |
2568 | } | |
2569 | g_free(sn_tab); | |
2570 | } | |
2571 | ||
2572 | static void dump_json_image_info_list(ImageInfoList *list) | |
2573 | { | |
2574 | QString *str; | |
2575 | QObject *obj; | |
2576 | Visitor *v = qobject_output_visitor_new(&obj); | |
2577 | ||
2578 | visit_type_ImageInfoList(v, NULL, &list, &error_abort); | |
2579 | visit_complete(v, &obj); | |
2580 | str = qobject_to_json_pretty(obj); | |
2581 | assert(str != NULL); | |
2582 | printf("%s\n", qstring_get_str(str)); | |
2583 | qobject_unref(obj); | |
2584 | visit_free(v); | |
2585 | qobject_unref(str); | |
2586 | } | |
2587 | ||
2588 | static void dump_json_image_info(ImageInfo *info) | |
2589 | { | |
2590 | QString *str; | |
2591 | QObject *obj; | |
2592 | Visitor *v = qobject_output_visitor_new(&obj); | |
2593 | ||
2594 | visit_type_ImageInfo(v, NULL, &info, &error_abort); | |
2595 | visit_complete(v, &obj); | |
2596 | str = qobject_to_json_pretty(obj); | |
2597 | assert(str != NULL); | |
2598 | printf("%s\n", qstring_get_str(str)); | |
2599 | qobject_unref(obj); | |
2600 | visit_free(v); | |
2601 | qobject_unref(str); | |
2602 | } | |
2603 | ||
2604 | static void dump_human_image_info_list(ImageInfoList *list) | |
2605 | { | |
2606 | ImageInfoList *elem; | |
2607 | bool delim = false; | |
2608 | ||
2609 | for (elem = list; elem; elem = elem->next) { | |
2610 | if (delim) { | |
2611 | printf("\n"); | |
2612 | } | |
2613 | delim = true; | |
2614 | ||
2615 | bdrv_image_info_dump(elem->value); | |
2616 | } | |
2617 | } | |
2618 | ||
2619 | static gboolean str_equal_func(gconstpointer a, gconstpointer b) | |
2620 | { | |
2621 | return strcmp(a, b) == 0; | |
2622 | } | |
2623 | ||
2624 | /** | |
2625 | * Open an image file chain and return an ImageInfoList | |
2626 | * | |
2627 | * @filename: topmost image filename | |
2628 | * @fmt: topmost image format (may be NULL to autodetect) | |
2629 | * @chain: true - enumerate entire backing file chain | |
2630 | * false - only topmost image file | |
2631 | * | |
2632 | * Returns a list of ImageInfo objects or NULL if there was an error opening an | |
2633 | * image file. If there was an error a message will have been printed to | |
2634 | * stderr. | |
2635 | */ | |
2636 | static ImageInfoList *collect_image_info_list(bool image_opts, | |
2637 | const char *filename, | |
2638 | const char *fmt, | |
2639 | bool chain, bool force_share) | |
2640 | { | |
2641 | ImageInfoList *head = NULL; | |
2642 | ImageInfoList **last = &head; | |
2643 | GHashTable *filenames; | |
2644 | Error *err = NULL; | |
2645 | ||
2646 | filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); | |
2647 | ||
2648 | while (filename) { | |
2649 | BlockBackend *blk; | |
2650 | BlockDriverState *bs; | |
2651 | ImageInfo *info; | |
2652 | ImageInfoList *elem; | |
2653 | ||
2654 | if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { | |
2655 | error_report("Backing file '%s' creates an infinite loop.", | |
2656 | filename); | |
2657 | goto err; | |
2658 | } | |
2659 | g_hash_table_insert(filenames, (gpointer)filename, NULL); | |
2660 | ||
2661 | blk = img_open(image_opts, filename, fmt, | |
2662 | BDRV_O_NO_BACKING | BDRV_O_NO_IO, false, false, | |
2663 | force_share); | |
2664 | if (!blk) { | |
2665 | goto err; | |
2666 | } | |
2667 | bs = blk_bs(blk); | |
2668 | ||
2669 | bdrv_query_image_info(bs, &info, &err); | |
2670 | if (err) { | |
2671 | error_report_err(err); | |
2672 | blk_unref(blk); | |
2673 | goto err; | |
2674 | } | |
2675 | ||
2676 | elem = g_new0(ImageInfoList, 1); | |
2677 | elem->value = info; | |
2678 | *last = elem; | |
2679 | last = &elem->next; | |
2680 | ||
2681 | blk_unref(blk); | |
2682 | ||
2683 | filename = fmt = NULL; | |
2684 | if (chain) { | |
2685 | if (info->has_full_backing_filename) { | |
2686 | filename = info->full_backing_filename; | |
2687 | } else if (info->has_backing_filename) { | |
2688 | error_report("Could not determine absolute backing filename," | |
2689 | " but backing filename '%s' present", | |
2690 | info->backing_filename); | |
2691 | goto err; | |
2692 | } | |
2693 | if (info->has_backing_filename_format) { | |
2694 | fmt = info->backing_filename_format; | |
2695 | } | |
2696 | } | |
2697 | } | |
2698 | g_hash_table_destroy(filenames); | |
2699 | return head; | |
2700 | ||
2701 | err: | |
2702 | qapi_free_ImageInfoList(head); | |
2703 | g_hash_table_destroy(filenames); | |
2704 | return NULL; | |
2705 | } | |
2706 | ||
2707 | static int img_info(int argc, char **argv) | |
2708 | { | |
2709 | int c; | |
2710 | OutputFormat output_format = OFORMAT_HUMAN; | |
2711 | bool chain = false; | |
2712 | const char *filename, *fmt, *output; | |
2713 | ImageInfoList *list; | |
2714 | bool image_opts = false; | |
2715 | bool force_share = false; | |
2716 | ||
2717 | fmt = NULL; | |
2718 | output = NULL; | |
2719 | for(;;) { | |
2720 | int option_index = 0; | |
2721 | static const struct option long_options[] = { | |
2722 | {"help", no_argument, 0, 'h'}, | |
2723 | {"format", required_argument, 0, 'f'}, | |
2724 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
2725 | {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, | |
2726 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2727 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2728 | {"force-share", no_argument, 0, 'U'}, | |
2729 | {0, 0, 0, 0} | |
2730 | }; | |
2731 | c = getopt_long(argc, argv, ":f:hU", | |
2732 | long_options, &option_index); | |
2733 | if (c == -1) { | |
2734 | break; | |
2735 | } | |
2736 | switch(c) { | |
2737 | case ':': | |
2738 | missing_argument(argv[optind - 1]); | |
2739 | break; | |
2740 | case '?': | |
2741 | unrecognized_option(argv[optind - 1]); | |
2742 | break; | |
2743 | case 'h': | |
2744 | help(); | |
2745 | break; | |
2746 | case 'f': | |
2747 | fmt = optarg; | |
2748 | break; | |
2749 | case 'U': | |
2750 | force_share = true; | |
2751 | break; | |
2752 | case OPTION_OUTPUT: | |
2753 | output = optarg; | |
2754 | break; | |
2755 | case OPTION_BACKING_CHAIN: | |
2756 | chain = true; | |
2757 | break; | |
2758 | case OPTION_OBJECT: { | |
2759 | QemuOpts *opts; | |
2760 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
2761 | optarg, true); | |
2762 | if (!opts) { | |
2763 | return 1; | |
2764 | } | |
2765 | } break; | |
2766 | case OPTION_IMAGE_OPTS: | |
2767 | image_opts = true; | |
2768 | break; | |
2769 | } | |
2770 | } | |
2771 | if (optind != argc - 1) { | |
2772 | error_exit("Expecting one image file name"); | |
2773 | } | |
2774 | filename = argv[optind++]; | |
2775 | ||
2776 | if (output && !strcmp(output, "json")) { | |
2777 | output_format = OFORMAT_JSON; | |
2778 | } else if (output && !strcmp(output, "human")) { | |
2779 | output_format = OFORMAT_HUMAN; | |
2780 | } else if (output) { | |
2781 | error_report("--output must be used with human or json as argument."); | |
2782 | return 1; | |
2783 | } | |
2784 | ||
2785 | if (qemu_opts_foreach(&qemu_object_opts, | |
2786 | user_creatable_add_opts_foreach, | |
2787 | qemu_img_object_print_help, &error_fatal)) { | |
2788 | return 1; | |
2789 | } | |
2790 | ||
2791 | list = collect_image_info_list(image_opts, filename, fmt, chain, | |
2792 | force_share); | |
2793 | if (!list) { | |
2794 | return 1; | |
2795 | } | |
2796 | ||
2797 | switch (output_format) { | |
2798 | case OFORMAT_HUMAN: | |
2799 | dump_human_image_info_list(list); | |
2800 | break; | |
2801 | case OFORMAT_JSON: | |
2802 | if (chain) { | |
2803 | dump_json_image_info_list(list); | |
2804 | } else { | |
2805 | dump_json_image_info(list->value); | |
2806 | } | |
2807 | break; | |
2808 | } | |
2809 | ||
2810 | qapi_free_ImageInfoList(list); | |
2811 | return 0; | |
2812 | } | |
2813 | ||
2814 | static int dump_map_entry(OutputFormat output_format, MapEntry *e, | |
2815 | MapEntry *next) | |
2816 | { | |
2817 | switch (output_format) { | |
2818 | case OFORMAT_HUMAN: | |
2819 | if (e->data && !e->has_offset) { | |
2820 | error_report("File contains external, encrypted or compressed clusters."); | |
2821 | return -1; | |
2822 | } | |
2823 | if (e->data && !e->zero) { | |
2824 | printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", | |
2825 | e->start, e->length, | |
2826 | e->has_offset ? e->offset : 0, | |
2827 | e->has_filename ? e->filename : ""); | |
2828 | } | |
2829 | /* This format ignores the distinction between 0, ZERO and ZERO|DATA. | |
2830 | * Modify the flags here to allow more coalescing. | |
2831 | */ | |
2832 | if (next && (!next->data || next->zero)) { | |
2833 | next->data = false; | |
2834 | next->zero = true; | |
2835 | } | |
2836 | break; | |
2837 | case OFORMAT_JSON: | |
2838 | printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64"," | |
2839 | " \"depth\": %"PRId64", \"zero\": %s, \"data\": %s", | |
2840 | (e->start == 0 ? "[" : ",\n"), | |
2841 | e->start, e->length, e->depth, | |
2842 | e->zero ? "true" : "false", | |
2843 | e->data ? "true" : "false"); | |
2844 | if (e->has_offset) { | |
2845 | printf(", \"offset\": %"PRId64"", e->offset); | |
2846 | } | |
2847 | putchar('}'); | |
2848 | ||
2849 | if (!next) { | |
2850 | printf("]\n"); | |
2851 | } | |
2852 | break; | |
2853 | } | |
2854 | return 0; | |
2855 | } | |
2856 | ||
2857 | static int get_block_status(BlockDriverState *bs, int64_t offset, | |
2858 | int64_t bytes, MapEntry *e) | |
2859 | { | |
2860 | int ret; | |
2861 | int depth; | |
2862 | BlockDriverState *file; | |
2863 | bool has_offset; | |
2864 | int64_t map; | |
2865 | char *filename = NULL; | |
2866 | ||
2867 | /* As an optimization, we could cache the current range of unallocated | |
2868 | * clusters in each file of the chain, and avoid querying the same | |
2869 | * range repeatedly. | |
2870 | */ | |
2871 | ||
2872 | depth = 0; | |
2873 | for (;;) { | |
2874 | ret = bdrv_block_status(bs, offset, bytes, &bytes, &map, &file); | |
2875 | if (ret < 0) { | |
2876 | return ret; | |
2877 | } | |
2878 | assert(bytes); | |
2879 | if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { | |
2880 | break; | |
2881 | } | |
2882 | bs = backing_bs(bs); | |
2883 | if (bs == NULL) { | |
2884 | ret = 0; | |
2885 | break; | |
2886 | } | |
2887 | ||
2888 | depth++; | |
2889 | } | |
2890 | ||
2891 | has_offset = !!(ret & BDRV_BLOCK_OFFSET_VALID); | |
2892 | ||
2893 | if (file && has_offset) { | |
2894 | bdrv_refresh_filename(file); | |
2895 | filename = file->filename; | |
2896 | } | |
2897 | ||
2898 | *e = (MapEntry) { | |
2899 | .start = offset, | |
2900 | .length = bytes, | |
2901 | .data = !!(ret & BDRV_BLOCK_DATA), | |
2902 | .zero = !!(ret & BDRV_BLOCK_ZERO), | |
2903 | .offset = map, | |
2904 | .has_offset = has_offset, | |
2905 | .depth = depth, | |
2906 | .has_filename = filename, | |
2907 | .filename = filename, | |
2908 | }; | |
2909 | ||
2910 | return 0; | |
2911 | } | |
2912 | ||
2913 | static inline bool entry_mergeable(const MapEntry *curr, const MapEntry *next) | |
2914 | { | |
2915 | if (curr->length == 0) { | |
2916 | return false; | |
2917 | } | |
2918 | if (curr->zero != next->zero || | |
2919 | curr->data != next->data || | |
2920 | curr->depth != next->depth || | |
2921 | curr->has_filename != next->has_filename || | |
2922 | curr->has_offset != next->has_offset) { | |
2923 | return false; | |
2924 | } | |
2925 | if (curr->has_filename && strcmp(curr->filename, next->filename)) { | |
2926 | return false; | |
2927 | } | |
2928 | if (curr->has_offset && curr->offset + curr->length != next->offset) { | |
2929 | return false; | |
2930 | } | |
2931 | return true; | |
2932 | } | |
2933 | ||
2934 | static int img_map(int argc, char **argv) | |
2935 | { | |
2936 | int c; | |
2937 | OutputFormat output_format = OFORMAT_HUMAN; | |
2938 | BlockBackend *blk; | |
2939 | BlockDriverState *bs; | |
2940 | const char *filename, *fmt, *output; | |
2941 | int64_t length; | |
2942 | MapEntry curr = { .length = 0 }, next; | |
2943 | int ret = 0; | |
2944 | bool image_opts = false; | |
2945 | bool force_share = false; | |
2946 | ||
2947 | fmt = NULL; | |
2948 | output = NULL; | |
2949 | for (;;) { | |
2950 | int option_index = 0; | |
2951 | static const struct option long_options[] = { | |
2952 | {"help", no_argument, 0, 'h'}, | |
2953 | {"format", required_argument, 0, 'f'}, | |
2954 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
2955 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2956 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2957 | {"force-share", no_argument, 0, 'U'}, | |
2958 | {0, 0, 0, 0} | |
2959 | }; | |
2960 | c = getopt_long(argc, argv, ":f:hU", | |
2961 | long_options, &option_index); | |
2962 | if (c == -1) { | |
2963 | break; | |
2964 | } | |
2965 | switch (c) { | |
2966 | case ':': | |
2967 | missing_argument(argv[optind - 1]); | |
2968 | break; | |
2969 | case '?': | |
2970 | unrecognized_option(argv[optind - 1]); | |
2971 | break; | |
2972 | case 'h': | |
2973 | help(); | |
2974 | break; | |
2975 | case 'f': | |
2976 | fmt = optarg; | |
2977 | break; | |
2978 | case 'U': | |
2979 | force_share = true; | |
2980 | break; | |
2981 | case OPTION_OUTPUT: | |
2982 | output = optarg; | |
2983 | break; | |
2984 | case OPTION_OBJECT: { | |
2985 | QemuOpts *opts; | |
2986 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
2987 | optarg, true); | |
2988 | if (!opts) { | |
2989 | return 1; | |
2990 | } | |
2991 | } break; | |
2992 | case OPTION_IMAGE_OPTS: | |
2993 | image_opts = true; | |
2994 | break; | |
2995 | } | |
2996 | } | |
2997 | if (optind != argc - 1) { | |
2998 | error_exit("Expecting one image file name"); | |
2999 | } | |
3000 | filename = argv[optind]; | |
3001 | ||
3002 | if (output && !strcmp(output, "json")) { | |
3003 | output_format = OFORMAT_JSON; | |
3004 | } else if (output && !strcmp(output, "human")) { | |
3005 | output_format = OFORMAT_HUMAN; | |
3006 | } else if (output) { | |
3007 | error_report("--output must be used with human or json as argument."); | |
3008 | return 1; | |
3009 | } | |
3010 | ||
3011 | if (qemu_opts_foreach(&qemu_object_opts, | |
3012 | user_creatable_add_opts_foreach, | |
3013 | qemu_img_object_print_help, &error_fatal)) { | |
3014 | return 1; | |
3015 | } | |
3016 | ||
3017 | blk = img_open(image_opts, filename, fmt, 0, false, false, force_share); | |
3018 | if (!blk) { | |
3019 | return 1; | |
3020 | } | |
3021 | bs = blk_bs(blk); | |
3022 | ||
3023 | if (output_format == OFORMAT_HUMAN) { | |
3024 | printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); | |
3025 | } | |
3026 | ||
3027 | length = blk_getlength(blk); | |
3028 | while (curr.start + curr.length < length) { | |
3029 | int64_t offset = curr.start + curr.length; | |
3030 | int64_t n; | |
3031 | ||
3032 | /* Probe up to 1 GiB at a time. */ | |
3033 | n = MIN(1 * GiB, length - offset); | |
3034 | ret = get_block_status(bs, offset, n, &next); | |
3035 | ||
3036 | if (ret < 0) { | |
3037 | error_report("Could not read file metadata: %s", strerror(-ret)); | |
3038 | goto out; | |
3039 | } | |
3040 | ||
3041 | if (entry_mergeable(&curr, &next)) { | |
3042 | curr.length += next.length; | |
3043 | continue; | |
3044 | } | |
3045 | ||
3046 | if (curr.length > 0) { | |
3047 | ret = dump_map_entry(output_format, &curr, &next); | |
3048 | if (ret < 0) { | |
3049 | goto out; | |
3050 | } | |
3051 | } | |
3052 | curr = next; | |
3053 | } | |
3054 | ||
3055 | ret = dump_map_entry(output_format, &curr, NULL); | |
3056 | ||
3057 | out: | |
3058 | blk_unref(blk); | |
3059 | return ret < 0; | |
3060 | } | |
3061 | ||
3062 | #define SNAPSHOT_LIST 1 | |
3063 | #define SNAPSHOT_CREATE 2 | |
3064 | #define SNAPSHOT_APPLY 3 | |
3065 | #define SNAPSHOT_DELETE 4 | |
3066 | ||
3067 | static int img_snapshot(int argc, char **argv) | |
3068 | { | |
3069 | BlockBackend *blk; | |
3070 | BlockDriverState *bs; | |
3071 | QEMUSnapshotInfo sn; | |
3072 | char *filename, *snapshot_name = NULL; | |
3073 | int c, ret = 0, bdrv_oflags; | |
3074 | int action = 0; | |
3075 | qemu_timeval tv; | |
3076 | bool quiet = false; | |
3077 | Error *err = NULL; | |
3078 | bool image_opts = false; | |
3079 | bool force_share = false; | |
3080 | ||
3081 | bdrv_oflags = BDRV_O_RDWR; | |
3082 | /* Parse commandline parameters */ | |
3083 | for(;;) { | |
3084 | static const struct option long_options[] = { | |
3085 | {"help", no_argument, 0, 'h'}, | |
3086 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3087 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3088 | {"force-share", no_argument, 0, 'U'}, | |
3089 | {0, 0, 0, 0} | |
3090 | }; | |
3091 | c = getopt_long(argc, argv, ":la:c:d:hqU", | |
3092 | long_options, NULL); | |
3093 | if (c == -1) { | |
3094 | break; | |
3095 | } | |
3096 | switch(c) { | |
3097 | case ':': | |
3098 | missing_argument(argv[optind - 1]); | |
3099 | break; | |
3100 | case '?': | |
3101 | unrecognized_option(argv[optind - 1]); | |
3102 | break; | |
3103 | case 'h': | |
3104 | help(); | |
3105 | return 0; | |
3106 | case 'l': | |
3107 | if (action) { | |
3108 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
3109 | return 0; | |
3110 | } | |
3111 | action = SNAPSHOT_LIST; | |
3112 | bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ | |
3113 | break; | |
3114 | case 'a': | |
3115 | if (action) { | |
3116 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
3117 | return 0; | |
3118 | } | |
3119 | action = SNAPSHOT_APPLY; | |
3120 | snapshot_name = optarg; | |
3121 | break; | |
3122 | case 'c': | |
3123 | if (action) { | |
3124 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
3125 | return 0; | |
3126 | } | |
3127 | action = SNAPSHOT_CREATE; | |
3128 | snapshot_name = optarg; | |
3129 | break; | |
3130 | case 'd': | |
3131 | if (action) { | |
3132 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
3133 | return 0; | |
3134 | } | |
3135 | action = SNAPSHOT_DELETE; | |
3136 | snapshot_name = optarg; | |
3137 | break; | |
3138 | case 'q': | |
3139 | quiet = true; | |
3140 | break; | |
3141 | case 'U': | |
3142 | force_share = true; | |
3143 | break; | |
3144 | case OPTION_OBJECT: { | |
3145 | QemuOpts *opts; | |
3146 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
3147 | optarg, true); | |
3148 | if (!opts) { | |
3149 | return 1; | |
3150 | } | |
3151 | } break; | |
3152 | case OPTION_IMAGE_OPTS: | |
3153 | image_opts = true; | |
3154 | break; | |
3155 | } | |
3156 | } | |
3157 | ||
3158 | if (optind != argc - 1) { | |
3159 | error_exit("Expecting one image file name"); | |
3160 | } | |
3161 | filename = argv[optind++]; | |
3162 | ||
3163 | if (qemu_opts_foreach(&qemu_object_opts, | |
3164 | user_creatable_add_opts_foreach, | |
3165 | qemu_img_object_print_help, &error_fatal)) { | |
3166 | return 1; | |
3167 | } | |
3168 | ||
3169 | /* Open the image */ | |
3170 | blk = img_open(image_opts, filename, NULL, bdrv_oflags, false, quiet, | |
3171 | force_share); | |
3172 | if (!blk) { | |
3173 | return 1; | |
3174 | } | |
3175 | bs = blk_bs(blk); | |
3176 | ||
3177 | /* Perform the requested action */ | |
3178 | switch(action) { | |
3179 | case SNAPSHOT_LIST: | |
3180 | dump_snapshots(bs); | |
3181 | break; | |
3182 | ||
3183 | case SNAPSHOT_CREATE: | |
3184 | memset(&sn, 0, sizeof(sn)); | |
3185 | pstrcpy(sn.name, sizeof(sn.name), snapshot_name); | |
3186 | ||
3187 | qemu_gettimeofday(&tv); | |
3188 | sn.date_sec = tv.tv_sec; | |
3189 | sn.date_nsec = tv.tv_usec * 1000; | |
3190 | ||
3191 | ret = bdrv_snapshot_create(bs, &sn); | |
3192 | if (ret) { | |
3193 | error_report("Could not create snapshot '%s': %d (%s)", | |
3194 | snapshot_name, ret, strerror(-ret)); | |
3195 | } | |
3196 | break; | |
3197 | ||
3198 | case SNAPSHOT_APPLY: | |
3199 | ret = bdrv_snapshot_goto(bs, snapshot_name, &err); | |
3200 | if (ret) { | |
3201 | error_reportf_err(err, "Could not apply snapshot '%s': ", | |
3202 | snapshot_name); | |
3203 | } | |
3204 | break; | |
3205 | ||
3206 | case SNAPSHOT_DELETE: | |
3207 | ret = bdrv_snapshot_find(bs, &sn, snapshot_name); | |
3208 | if (ret < 0) { | |
3209 | error_report("Could not delete snapshot '%s': snapshot not " | |
3210 | "found", snapshot_name); | |
3211 | ret = 1; | |
3212 | } else { | |
3213 | ret = bdrv_snapshot_delete(bs, sn.id_str, sn.name, &err); | |
3214 | if (ret < 0) { | |
3215 | error_reportf_err(err, "Could not delete snapshot '%s': ", | |
3216 | snapshot_name); | |
3217 | ret = 1; | |
3218 | } | |
3219 | } | |
3220 | break; | |
3221 | } | |
3222 | ||
3223 | /* Cleanup */ | |
3224 | blk_unref(blk); | |
3225 | if (ret) { | |
3226 | return 1; | |
3227 | } | |
3228 | return 0; | |
3229 | } | |
3230 | ||
3231 | static int img_rebase(int argc, char **argv) | |
3232 | { | |
3233 | BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL; | |
3234 | uint8_t *buf_old = NULL; | |
3235 | uint8_t *buf_new = NULL; | |
3236 | BlockDriverState *bs = NULL, *prefix_chain_bs = NULL; | |
3237 | char *filename; | |
3238 | const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; | |
3239 | int c, flags, src_flags, ret; | |
3240 | bool writethrough, src_writethrough; | |
3241 | int unsafe = 0; | |
3242 | bool force_share = false; | |
3243 | int progress = 0; | |
3244 | bool quiet = false; | |
3245 | Error *local_err = NULL; | |
3246 | bool image_opts = false; | |
3247 | ||
3248 | /* Parse commandline parameters */ | |
3249 | fmt = NULL; | |
3250 | cache = BDRV_DEFAULT_CACHE; | |
3251 | src_cache = BDRV_DEFAULT_CACHE; | |
3252 | out_baseimg = NULL; | |
3253 | out_basefmt = NULL; | |
3254 | for(;;) { | |
3255 | static const struct option long_options[] = { | |
3256 | {"help", no_argument, 0, 'h'}, | |
3257 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3258 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3259 | {"force-share", no_argument, 0, 'U'}, | |
3260 | {0, 0, 0, 0} | |
3261 | }; | |
3262 | c = getopt_long(argc, argv, ":hf:F:b:upt:T:qU", | |
3263 | long_options, NULL); | |
3264 | if (c == -1) { | |
3265 | break; | |
3266 | } | |
3267 | switch(c) { | |
3268 | case ':': | |
3269 | missing_argument(argv[optind - 1]); | |
3270 | break; | |
3271 | case '?': | |
3272 | unrecognized_option(argv[optind - 1]); | |
3273 | break; | |
3274 | case 'h': | |
3275 | help(); | |
3276 | return 0; | |
3277 | case 'f': | |
3278 | fmt = optarg; | |
3279 | break; | |
3280 | case 'F': | |
3281 | out_basefmt = optarg; | |
3282 | break; | |
3283 | case 'b': | |
3284 | out_baseimg = optarg; | |
3285 | break; | |
3286 | case 'u': | |
3287 | unsafe = 1; | |
3288 | break; | |
3289 | case 'p': | |
3290 | progress = 1; | |
3291 | break; | |
3292 | case 't': | |
3293 | cache = optarg; | |
3294 | break; | |
3295 | case 'T': | |
3296 | src_cache = optarg; | |
3297 | break; | |
3298 | case 'q': | |
3299 | quiet = true; | |
3300 | break; | |
3301 | case OPTION_OBJECT: { | |
3302 | QemuOpts *opts; | |
3303 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
3304 | optarg, true); | |
3305 | if (!opts) { | |
3306 | return 1; | |
3307 | } | |
3308 | } break; | |
3309 | case OPTION_IMAGE_OPTS: | |
3310 | image_opts = true; | |
3311 | break; | |
3312 | case 'U': | |
3313 | force_share = true; | |
3314 | break; | |
3315 | } | |
3316 | } | |
3317 | ||
3318 | if (quiet) { | |
3319 | progress = 0; | |
3320 | } | |
3321 | ||
3322 | if (optind != argc - 1) { | |
3323 | error_exit("Expecting one image file name"); | |
3324 | } | |
3325 | if (!unsafe && !out_baseimg) { | |
3326 | error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); | |
3327 | } | |
3328 | filename = argv[optind++]; | |
3329 | ||
3330 | if (qemu_opts_foreach(&qemu_object_opts, | |
3331 | user_creatable_add_opts_foreach, | |
3332 | qemu_img_object_print_help, &error_fatal)) { | |
3333 | return 1; | |
3334 | } | |
3335 | ||
3336 | qemu_progress_init(progress, 2.0); | |
3337 | qemu_progress_print(0, 100); | |
3338 | ||
3339 | flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); | |
3340 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
3341 | if (ret < 0) { | |
3342 | error_report("Invalid cache option: %s", cache); | |
3343 | goto out; | |
3344 | } | |
3345 | ||
3346 | src_flags = 0; | |
3347 | ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough); | |
3348 | if (ret < 0) { | |
3349 | error_report("Invalid source cache option: %s", src_cache); | |
3350 | goto out; | |
3351 | } | |
3352 | ||
3353 | /* The source files are opened read-only, don't care about WCE */ | |
3354 | assert((src_flags & BDRV_O_RDWR) == 0); | |
3355 | (void) src_writethrough; | |
3356 | ||
3357 | /* | |
3358 | * Open the images. | |
3359 | * | |
3360 | * Ignore the old backing file for unsafe rebase in case we want to correct | |
3361 | * the reference to a renamed or moved backing file. | |
3362 | */ | |
3363 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, | |
3364 | false); | |
3365 | if (!blk) { | |
3366 | ret = -1; | |
3367 | goto out; | |
3368 | } | |
3369 | bs = blk_bs(blk); | |
3370 | ||
3371 | if (out_basefmt != NULL) { | |
3372 | if (bdrv_find_format(out_basefmt) == NULL) { | |
3373 | error_report("Invalid format name: '%s'", out_basefmt); | |
3374 | ret = -1; | |
3375 | goto out; | |
3376 | } | |
3377 | } | |
3378 | ||
3379 | /* For safe rebasing we need to compare old and new backing file */ | |
3380 | if (!unsafe) { | |
3381 | QDict *options = NULL; | |
3382 | BlockDriverState *base_bs = backing_bs(bs); | |
3383 | ||
3384 | if (base_bs) { | |
3385 | blk_old_backing = blk_new(qemu_get_aio_context(), | |
3386 | BLK_PERM_CONSISTENT_READ, | |
3387 | BLK_PERM_ALL); | |
3388 | ret = blk_insert_bs(blk_old_backing, base_bs, | |
3389 | &local_err); | |
3390 | if (ret < 0) { | |
3391 | error_reportf_err(local_err, | |
3392 | "Could not reuse old backing file '%s': ", | |
3393 | base_bs->filename); | |
3394 | goto out; | |
3395 | } | |
3396 | } else { | |
3397 | blk_old_backing = NULL; | |
3398 | } | |
3399 | ||
3400 | if (out_baseimg[0]) { | |
3401 | const char *overlay_filename; | |
3402 | char *out_real_path; | |
3403 | ||
3404 | options = qdict_new(); | |
3405 | if (out_basefmt) { | |
3406 | qdict_put_str(options, "driver", out_basefmt); | |
3407 | } | |
3408 | if (force_share) { | |
3409 | qdict_put_bool(options, BDRV_OPT_FORCE_SHARE, true); | |
3410 | } | |
3411 | ||
3412 | bdrv_refresh_filename(bs); | |
3413 | overlay_filename = bs->exact_filename[0] ? bs->exact_filename | |
3414 | : bs->filename; | |
3415 | out_real_path = | |
3416 | bdrv_get_full_backing_filename_from_filename(overlay_filename, | |
3417 | out_baseimg, | |
3418 | &local_err); | |
3419 | if (local_err) { | |
3420 | qobject_unref(options); | |
3421 | error_reportf_err(local_err, | |
3422 | "Could not resolve backing filename: "); | |
3423 | ret = -1; | |
3424 | goto out; | |
3425 | } | |
3426 | ||
3427 | /* | |
3428 | * Find out whether we rebase an image on top of a previous image | |
3429 | * in its chain. | |
3430 | */ | |
3431 | prefix_chain_bs = bdrv_find_backing_image(bs, out_real_path); | |
3432 | if (prefix_chain_bs) { | |
3433 | qobject_unref(options); | |
3434 | g_free(out_real_path); | |
3435 | ||
3436 | blk_new_backing = blk_new(qemu_get_aio_context(), | |
3437 | BLK_PERM_CONSISTENT_READ, | |
3438 | BLK_PERM_ALL); | |
3439 | ret = blk_insert_bs(blk_new_backing, prefix_chain_bs, | |
3440 | &local_err); | |
3441 | if (ret < 0) { | |
3442 | error_reportf_err(local_err, | |
3443 | "Could not reuse backing file '%s': ", | |
3444 | out_baseimg); | |
3445 | goto out; | |
3446 | } | |
3447 | } else { | |
3448 | blk_new_backing = blk_new_open(out_real_path, NULL, | |
3449 | options, src_flags, &local_err); | |
3450 | g_free(out_real_path); | |
3451 | if (!blk_new_backing) { | |
3452 | error_reportf_err(local_err, | |
3453 | "Could not open new backing file '%s': ", | |
3454 | out_baseimg); | |
3455 | ret = -1; | |
3456 | goto out; | |
3457 | } | |
3458 | } | |
3459 | } | |
3460 | } | |
3461 | ||
3462 | /* | |
3463 | * Check each unallocated cluster in the COW file. If it is unallocated, | |
3464 | * accesses go to the backing file. We must therefore compare this cluster | |
3465 | * in the old and new backing file, and if they differ we need to copy it | |
3466 | * from the old backing file into the COW file. | |
3467 | * | |
3468 | * If qemu-img crashes during this step, no harm is done. The content of | |
3469 | * the image is the same as the original one at any time. | |
3470 | */ | |
3471 | if (!unsafe) { | |
3472 | int64_t size; | |
3473 | int64_t old_backing_size = 0; | |
3474 | int64_t new_backing_size = 0; | |
3475 | uint64_t offset; | |
3476 | int64_t n; | |
3477 | float local_progress = 0; | |
3478 | ||
3479 | buf_old = blk_blockalign(blk, IO_BUF_SIZE); | |
3480 | buf_new = blk_blockalign(blk, IO_BUF_SIZE); | |
3481 | ||
3482 | size = blk_getlength(blk); | |
3483 | if (size < 0) { | |
3484 | error_report("Could not get size of '%s': %s", | |
3485 | filename, strerror(-size)); | |
3486 | ret = -1; | |
3487 | goto out; | |
3488 | } | |
3489 | if (blk_old_backing) { | |
3490 | old_backing_size = blk_getlength(blk_old_backing); | |
3491 | if (old_backing_size < 0) { | |
3492 | char backing_name[PATH_MAX]; | |
3493 | ||
3494 | bdrv_get_backing_filename(bs, backing_name, | |
3495 | sizeof(backing_name)); | |
3496 | error_report("Could not get size of '%s': %s", | |
3497 | backing_name, strerror(-old_backing_size)); | |
3498 | ret = -1; | |
3499 | goto out; | |
3500 | } | |
3501 | } | |
3502 | if (blk_new_backing) { | |
3503 | new_backing_size = blk_getlength(blk_new_backing); | |
3504 | if (new_backing_size < 0) { | |
3505 | error_report("Could not get size of '%s': %s", | |
3506 | out_baseimg, strerror(-new_backing_size)); | |
3507 | ret = -1; | |
3508 | goto out; | |
3509 | } | |
3510 | } | |
3511 | ||
3512 | if (size != 0) { | |
3513 | local_progress = (float)100 / (size / MIN(size, IO_BUF_SIZE)); | |
3514 | } | |
3515 | ||
3516 | for (offset = 0; offset < size; offset += n) { | |
3517 | bool buf_old_is_zero = false; | |
3518 | ||
3519 | /* How many bytes can we handle with the next read? */ | |
3520 | n = MIN(IO_BUF_SIZE, size - offset); | |
3521 | ||
3522 | /* If the cluster is allocated, we don't need to take action */ | |
3523 | ret = bdrv_is_allocated(bs, offset, n, &n); | |
3524 | if (ret < 0) { | |
3525 | error_report("error while reading image metadata: %s", | |
3526 | strerror(-ret)); | |
3527 | goto out; | |
3528 | } | |
3529 | if (ret) { | |
3530 | continue; | |
3531 | } | |
3532 | ||
3533 | if (prefix_chain_bs) { | |
3534 | /* | |
3535 | * If cluster wasn't changed since prefix_chain, we don't need | |
3536 | * to take action | |
3537 | */ | |
3538 | ret = bdrv_is_allocated_above(backing_bs(bs), prefix_chain_bs, | |
3539 | false, offset, n, &n); | |
3540 | if (ret < 0) { | |
3541 | error_report("error while reading image metadata: %s", | |
3542 | strerror(-ret)); | |
3543 | goto out; | |
3544 | } | |
3545 | if (!ret) { | |
3546 | continue; | |
3547 | } | |
3548 | } | |
3549 | ||
3550 | /* | |
3551 | * Read old and new backing file and take into consideration that | |
3552 | * backing files may be smaller than the COW image. | |
3553 | */ | |
3554 | if (offset >= old_backing_size) { | |
3555 | memset(buf_old, 0, n); | |
3556 | buf_old_is_zero = true; | |
3557 | } else { | |
3558 | if (offset + n > old_backing_size) { | |
3559 | n = old_backing_size - offset; | |
3560 | } | |
3561 | ||
3562 | ret = blk_pread(blk_old_backing, offset, buf_old, n); | |
3563 | if (ret < 0) { | |
3564 | error_report("error while reading from old backing file"); | |
3565 | goto out; | |
3566 | } | |
3567 | } | |
3568 | ||
3569 | if (offset >= new_backing_size || !blk_new_backing) { | |
3570 | memset(buf_new, 0, n); | |
3571 | } else { | |
3572 | if (offset + n > new_backing_size) { | |
3573 | n = new_backing_size - offset; | |
3574 | } | |
3575 | ||
3576 | ret = blk_pread(blk_new_backing, offset, buf_new, n); | |
3577 | if (ret < 0) { | |
3578 | error_report("error while reading from new backing file"); | |
3579 | goto out; | |
3580 | } | |
3581 | } | |
3582 | ||
3583 | /* If they differ, we need to write to the COW file */ | |
3584 | uint64_t written = 0; | |
3585 | ||
3586 | while (written < n) { | |
3587 | int64_t pnum; | |
3588 | ||
3589 | if (compare_buffers(buf_old + written, buf_new + written, | |
3590 | n - written, &pnum)) | |
3591 | { | |
3592 | if (buf_old_is_zero) { | |
3593 | ret = blk_pwrite_zeroes(blk, offset + written, pnum, 0); | |
3594 | } else { | |
3595 | ret = blk_pwrite(blk, offset + written, | |
3596 | buf_old + written, pnum, 0); | |
3597 | } | |
3598 | if (ret < 0) { | |
3599 | error_report("Error while writing to COW image: %s", | |
3600 | strerror(-ret)); | |
3601 | goto out; | |
3602 | } | |
3603 | } | |
3604 | ||
3605 | written += pnum; | |
3606 | } | |
3607 | qemu_progress_print(local_progress, 100); | |
3608 | } | |
3609 | } | |
3610 | ||
3611 | /* | |
3612 | * Change the backing file. All clusters that are different from the old | |
3613 | * backing file are overwritten in the COW file now, so the visible content | |
3614 | * doesn't change when we switch the backing file. | |
3615 | */ | |
3616 | if (out_baseimg && *out_baseimg) { | |
3617 | ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); | |
3618 | } else { | |
3619 | ret = bdrv_change_backing_file(bs, NULL, NULL); | |
3620 | } | |
3621 | ||
3622 | if (ret == -ENOSPC) { | |
3623 | error_report("Could not change the backing file to '%s': No " | |
3624 | "space left in the file header", out_baseimg); | |
3625 | } else if (ret < 0) { | |
3626 | error_report("Could not change the backing file to '%s': %s", | |
3627 | out_baseimg, strerror(-ret)); | |
3628 | } | |
3629 | ||
3630 | qemu_progress_print(100, 0); | |
3631 | /* | |
3632 | * TODO At this point it is possible to check if any clusters that are | |
3633 | * allocated in the COW file are the same in the backing file. If so, they | |
3634 | * could be dropped from the COW file. Don't do this before switching the | |
3635 | * backing file, in case of a crash this would lead to corruption. | |
3636 | */ | |
3637 | out: | |
3638 | qemu_progress_end(); | |
3639 | /* Cleanup */ | |
3640 | if (!unsafe) { | |
3641 | blk_unref(blk_old_backing); | |
3642 | blk_unref(blk_new_backing); | |
3643 | } | |
3644 | qemu_vfree(buf_old); | |
3645 | qemu_vfree(buf_new); | |
3646 | ||
3647 | blk_unref(blk); | |
3648 | if (ret) { | |
3649 | return 1; | |
3650 | } | |
3651 | return 0; | |
3652 | } | |
3653 | ||
3654 | static int img_resize(int argc, char **argv) | |
3655 | { | |
3656 | Error *err = NULL; | |
3657 | int c, ret, relative; | |
3658 | const char *filename, *fmt, *size; | |
3659 | int64_t n, total_size, current_size; | |
3660 | bool quiet = false; | |
3661 | BlockBackend *blk = NULL; | |
3662 | PreallocMode prealloc = PREALLOC_MODE_OFF; | |
3663 | QemuOpts *param; | |
3664 | ||
3665 | static QemuOptsList resize_options = { | |
3666 | .name = "resize_options", | |
3667 | .head = QTAILQ_HEAD_INITIALIZER(resize_options.head), | |
3668 | .desc = { | |
3669 | { | |
3670 | .name = BLOCK_OPT_SIZE, | |
3671 | .type = QEMU_OPT_SIZE, | |
3672 | .help = "Virtual disk size" | |
3673 | }, { | |
3674 | /* end of list */ | |
3675 | } | |
3676 | }, | |
3677 | }; | |
3678 | bool image_opts = false; | |
3679 | bool shrink = false; | |
3680 | ||
3681 | /* Remove size from argv manually so that negative numbers are not treated | |
3682 | * as options by getopt. */ | |
3683 | if (argc < 3) { | |
3684 | error_exit("Not enough arguments"); | |
3685 | return 1; | |
3686 | } | |
3687 | ||
3688 | size = argv[--argc]; | |
3689 | ||
3690 | /* Parse getopt arguments */ | |
3691 | fmt = NULL; | |
3692 | for(;;) { | |
3693 | static const struct option long_options[] = { | |
3694 | {"help", no_argument, 0, 'h'}, | |
3695 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3696 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3697 | {"preallocation", required_argument, 0, OPTION_PREALLOCATION}, | |
3698 | {"shrink", no_argument, 0, OPTION_SHRINK}, | |
3699 | {0, 0, 0, 0} | |
3700 | }; | |
3701 | c = getopt_long(argc, argv, ":f:hq", | |
3702 | long_options, NULL); | |
3703 | if (c == -1) { | |
3704 | break; | |
3705 | } | |
3706 | switch(c) { | |
3707 | case ':': | |
3708 | missing_argument(argv[optind - 1]); | |
3709 | break; | |
3710 | case '?': | |
3711 | unrecognized_option(argv[optind - 1]); | |
3712 | break; | |
3713 | case 'h': | |
3714 | help(); | |
3715 | break; | |
3716 | case 'f': | |
3717 | fmt = optarg; | |
3718 | break; | |
3719 | case 'q': | |
3720 | quiet = true; | |
3721 | break; | |
3722 | case OPTION_OBJECT: { | |
3723 | QemuOpts *opts; | |
3724 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
3725 | optarg, true); | |
3726 | if (!opts) { | |
3727 | return 1; | |
3728 | } | |
3729 | } break; | |
3730 | case OPTION_IMAGE_OPTS: | |
3731 | image_opts = true; | |
3732 | break; | |
3733 | case OPTION_PREALLOCATION: | |
3734 | prealloc = qapi_enum_parse(&PreallocMode_lookup, optarg, | |
3735 | PREALLOC_MODE__MAX, NULL); | |
3736 | if (prealloc == PREALLOC_MODE__MAX) { | |
3737 | error_report("Invalid preallocation mode '%s'", optarg); | |
3738 | return 1; | |
3739 | } | |
3740 | break; | |
3741 | case OPTION_SHRINK: | |
3742 | shrink = true; | |
3743 | break; | |
3744 | } | |
3745 | } | |
3746 | if (optind != argc - 1) { | |
3747 | error_exit("Expecting image file name and size"); | |
3748 | } | |
3749 | filename = argv[optind++]; | |
3750 | ||
3751 | if (qemu_opts_foreach(&qemu_object_opts, | |
3752 | user_creatable_add_opts_foreach, | |
3753 | qemu_img_object_print_help, &error_fatal)) { | |
3754 | return 1; | |
3755 | } | |
3756 | ||
3757 | /* Choose grow, shrink, or absolute resize mode */ | |
3758 | switch (size[0]) { | |
3759 | case '+': | |
3760 | relative = 1; | |
3761 | size++; | |
3762 | break; | |
3763 | case '-': | |
3764 | relative = -1; | |
3765 | size++; | |
3766 | break; | |
3767 | default: | |
3768 | relative = 0; | |
3769 | break; | |
3770 | } | |
3771 | ||
3772 | /* Parse size */ | |
3773 | param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); | |
3774 | qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err); | |
3775 | if (err) { | |
3776 | error_report_err(err); | |
3777 | ret = -1; | |
3778 | qemu_opts_del(param); | |
3779 | goto out; | |
3780 | } | |
3781 | n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); | |
3782 | qemu_opts_del(param); | |
3783 | ||
3784 | blk = img_open(image_opts, filename, fmt, | |
3785 | BDRV_O_RDWR | BDRV_O_RESIZE, false, quiet, | |
3786 | false); | |
3787 | if (!blk) { | |
3788 | ret = -1; | |
3789 | goto out; | |
3790 | } | |
3791 | ||
3792 | current_size = blk_getlength(blk); | |
3793 | if (current_size < 0) { | |
3794 | error_report("Failed to inquire current image length: %s", | |
3795 | strerror(-current_size)); | |
3796 | ret = -1; | |
3797 | goto out; | |
3798 | } | |
3799 | ||
3800 | if (relative) { | |
3801 | total_size = current_size + n * relative; | |
3802 | } else { | |
3803 | total_size = n; | |
3804 | } | |
3805 | if (total_size <= 0) { | |
3806 | error_report("New image size must be positive"); | |
3807 | ret = -1; | |
3808 | goto out; | |
3809 | } | |
3810 | ||
3811 | if (total_size <= current_size && prealloc != PREALLOC_MODE_OFF) { | |
3812 | error_report("Preallocation can only be used for growing images"); | |
3813 | ret = -1; | |
3814 | goto out; | |
3815 | } | |
3816 | ||
3817 | if (total_size < current_size && !shrink) { | |
3818 | warn_report("Shrinking an image will delete all data beyond the " | |
3819 | "shrunken image's end. Before performing such an " | |
3820 | "operation, make sure there is no important data there."); | |
3821 | ||
3822 | if (g_strcmp0(bdrv_get_format_name(blk_bs(blk)), "raw") != 0) { | |
3823 | error_report( | |
3824 | "Use the --shrink option to perform a shrink operation."); | |
3825 | ret = -1; | |
3826 | goto out; | |
3827 | } else { | |
3828 | warn_report("Using the --shrink option will suppress this message. " | |
3829 | "Note that future versions of qemu-img may refuse to " | |
3830 | "shrink images without this option."); | |
3831 | } | |
3832 | } | |
3833 | ||
3834 | /* | |
3835 | * The user expects the image to have the desired size after | |
3836 | * resizing, so pass @exact=true. It is of no use to report | |
3837 | * success when the image has not actually been resized. | |
3838 | */ | |
3839 | ret = blk_truncate(blk, total_size, true, prealloc, &err); | |
3840 | if (!ret) { | |
3841 | qprintf(quiet, "Image resized.\n"); | |
3842 | } else { | |
3843 | error_report_err(err); | |
3844 | } | |
3845 | out: | |
3846 | blk_unref(blk); | |
3847 | if (ret) { | |
3848 | return 1; | |
3849 | } | |
3850 | return 0; | |
3851 | } | |
3852 | ||
3853 | static void amend_status_cb(BlockDriverState *bs, | |
3854 | int64_t offset, int64_t total_work_size, | |
3855 | void *opaque) | |
3856 | { | |
3857 | qemu_progress_print(100.f * offset / total_work_size, 0); | |
3858 | } | |
3859 | ||
3860 | static int print_amend_option_help(const char *format) | |
3861 | { | |
3862 | BlockDriver *drv; | |
3863 | ||
3864 | /* Find driver and parse its options */ | |
3865 | drv = bdrv_find_format(format); | |
3866 | if (!drv) { | |
3867 | error_report("Unknown file format '%s'", format); | |
3868 | return 1; | |
3869 | } | |
3870 | ||
3871 | if (!drv->bdrv_amend_options) { | |
3872 | error_report("Format driver '%s' does not support option amendment", | |
3873 | format); | |
3874 | return 1; | |
3875 | } | |
3876 | ||
3877 | /* Every driver supporting amendment must have create_opts */ | |
3878 | assert(drv->create_opts); | |
3879 | ||
3880 | printf("Creation options for '%s':\n", format); | |
3881 | qemu_opts_print_help(drv->create_opts, false); | |
3882 | printf("\nNote that not all of these options may be amendable.\n"); | |
3883 | return 0; | |
3884 | } | |
3885 | ||
3886 | static int img_amend(int argc, char **argv) | |
3887 | { | |
3888 | Error *err = NULL; | |
3889 | int c, ret = 0; | |
3890 | char *options = NULL; | |
3891 | QemuOptsList *create_opts = NULL; | |
3892 | QemuOpts *opts = NULL; | |
3893 | const char *fmt = NULL, *filename, *cache; | |
3894 | int flags; | |
3895 | bool writethrough; | |
3896 | bool quiet = false, progress = false; | |
3897 | BlockBackend *blk = NULL; | |
3898 | BlockDriverState *bs = NULL; | |
3899 | bool image_opts = false; | |
3900 | ||
3901 | cache = BDRV_DEFAULT_CACHE; | |
3902 | for (;;) { | |
3903 | static const struct option long_options[] = { | |
3904 | {"help", no_argument, 0, 'h'}, | |
3905 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3906 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3907 | {0, 0, 0, 0} | |
3908 | }; | |
3909 | c = getopt_long(argc, argv, ":ho:f:t:pq", | |
3910 | long_options, NULL); | |
3911 | if (c == -1) { | |
3912 | break; | |
3913 | } | |
3914 | ||
3915 | switch (c) { | |
3916 | case ':': | |
3917 | missing_argument(argv[optind - 1]); | |
3918 | break; | |
3919 | case '?': | |
3920 | unrecognized_option(argv[optind - 1]); | |
3921 | break; | |
3922 | case 'h': | |
3923 | help(); | |
3924 | break; | |
3925 | case 'o': | |
3926 | if (!is_valid_option_list(optarg)) { | |
3927 | error_report("Invalid option list: %s", optarg); | |
3928 | ret = -1; | |
3929 | goto out_no_progress; | |
3930 | } | |
3931 | if (!options) { | |
3932 | options = g_strdup(optarg); | |
3933 | } else { | |
3934 | char *old_options = options; | |
3935 | options = g_strdup_printf("%s,%s", options, optarg); | |
3936 | g_free(old_options); | |
3937 | } | |
3938 | break; | |
3939 | case 'f': | |
3940 | fmt = optarg; | |
3941 | break; | |
3942 | case 't': | |
3943 | cache = optarg; | |
3944 | break; | |
3945 | case 'p': | |
3946 | progress = true; | |
3947 | break; | |
3948 | case 'q': | |
3949 | quiet = true; | |
3950 | break; | |
3951 | case OPTION_OBJECT: | |
3952 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
3953 | optarg, true); | |
3954 | if (!opts) { | |
3955 | ret = -1; | |
3956 | goto out_no_progress; | |
3957 | } | |
3958 | break; | |
3959 | case OPTION_IMAGE_OPTS: | |
3960 | image_opts = true; | |
3961 | break; | |
3962 | } | |
3963 | } | |
3964 | ||
3965 | if (!options) { | |
3966 | error_exit("Must specify options (-o)"); | |
3967 | } | |
3968 | ||
3969 | if (qemu_opts_foreach(&qemu_object_opts, | |
3970 | user_creatable_add_opts_foreach, | |
3971 | qemu_img_object_print_help, &error_fatal)) { | |
3972 | ret = -1; | |
3973 | goto out_no_progress; | |
3974 | } | |
3975 | ||
3976 | if (quiet) { | |
3977 | progress = false; | |
3978 | } | |
3979 | qemu_progress_init(progress, 1.0); | |
3980 | ||
3981 | filename = (optind == argc - 1) ? argv[argc - 1] : NULL; | |
3982 | if (fmt && has_help_option(options)) { | |
3983 | /* If a format is explicitly specified (and possibly no filename is | |
3984 | * given), print option help here */ | |
3985 | ret = print_amend_option_help(fmt); | |
3986 | goto out; | |
3987 | } | |
3988 | ||
3989 | if (optind != argc - 1) { | |
3990 | error_report("Expecting one image file name"); | |
3991 | ret = -1; | |
3992 | goto out; | |
3993 | } | |
3994 | ||
3995 | flags = BDRV_O_RDWR; | |
3996 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
3997 | if (ret < 0) { | |
3998 | error_report("Invalid cache option: %s", cache); | |
3999 | goto out; | |
4000 | } | |
4001 | ||
4002 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, | |
4003 | false); | |
4004 | if (!blk) { | |
4005 | ret = -1; | |
4006 | goto out; | |
4007 | } | |
4008 | bs = blk_bs(blk); | |
4009 | ||
4010 | fmt = bs->drv->format_name; | |
4011 | ||
4012 | if (has_help_option(options)) { | |
4013 | /* If the format was auto-detected, print option help here */ | |
4014 | ret = print_amend_option_help(fmt); | |
4015 | goto out; | |
4016 | } | |
4017 | ||
4018 | if (!bs->drv->bdrv_amend_options) { | |
4019 | error_report("Format driver '%s' does not support option amendment", | |
4020 | fmt); | |
4021 | ret = -1; | |
4022 | goto out; | |
4023 | } | |
4024 | ||
4025 | /* Every driver supporting amendment must have create_opts */ | |
4026 | assert(bs->drv->create_opts); | |
4027 | ||
4028 | create_opts = qemu_opts_append(create_opts, bs->drv->create_opts); | |
4029 | opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); | |
4030 | qemu_opts_do_parse(opts, options, NULL, &err); | |
4031 | if (err) { | |
4032 | error_report_err(err); | |
4033 | ret = -1; | |
4034 | goto out; | |
4035 | } | |
4036 | ||
4037 | /* In case the driver does not call amend_status_cb() */ | |
4038 | qemu_progress_print(0.f, 0); | |
4039 | ret = bdrv_amend_options(bs, opts, &amend_status_cb, NULL, &err); | |
4040 | qemu_progress_print(100.f, 0); | |
4041 | if (ret < 0) { | |
4042 | error_report_err(err); | |
4043 | goto out; | |
4044 | } | |
4045 | ||
4046 | out: | |
4047 | qemu_progress_end(); | |
4048 | ||
4049 | out_no_progress: | |
4050 | blk_unref(blk); | |
4051 | qemu_opts_del(opts); | |
4052 | qemu_opts_free(create_opts); | |
4053 | g_free(options); | |
4054 | ||
4055 | if (ret) { | |
4056 | return 1; | |
4057 | } | |
4058 | return 0; | |
4059 | } | |
4060 | ||
4061 | typedef struct BenchData { | |
4062 | BlockBackend *blk; | |
4063 | uint64_t image_size; | |
4064 | bool write; | |
4065 | int bufsize; | |
4066 | int step; | |
4067 | int nrreq; | |
4068 | int n; | |
4069 | int flush_interval; | |
4070 | bool drain_on_flush; | |
4071 | uint8_t *buf; | |
4072 | QEMUIOVector *qiov; | |
4073 | ||
4074 | int in_flight; | |
4075 | bool in_flush; | |
4076 | uint64_t offset; | |
4077 | } BenchData; | |
4078 | ||
4079 | static void bench_undrained_flush_cb(void *opaque, int ret) | |
4080 | { | |
4081 | if (ret < 0) { | |
4082 | error_report("Failed flush request: %s", strerror(-ret)); | |
4083 | exit(EXIT_FAILURE); | |
4084 | } | |
4085 | } | |
4086 | ||
4087 | static void bench_cb(void *opaque, int ret) | |
4088 | { | |
4089 | BenchData *b = opaque; | |
4090 | BlockAIOCB *acb; | |
4091 | ||
4092 | if (ret < 0) { | |
4093 | error_report("Failed request: %s", strerror(-ret)); | |
4094 | exit(EXIT_FAILURE); | |
4095 | } | |
4096 | ||
4097 | if (b->in_flush) { | |
4098 | /* Just finished a flush with drained queue: Start next requests */ | |
4099 | assert(b->in_flight == 0); | |
4100 | b->in_flush = false; | |
4101 | } else if (b->in_flight > 0) { | |
4102 | int remaining = b->n - b->in_flight; | |
4103 | ||
4104 | b->n--; | |
4105 | b->in_flight--; | |
4106 | ||
4107 | /* Time for flush? Drain queue if requested, then flush */ | |
4108 | if (b->flush_interval && remaining % b->flush_interval == 0) { | |
4109 | if (!b->in_flight || !b->drain_on_flush) { | |
4110 | BlockCompletionFunc *cb; | |
4111 | ||
4112 | if (b->drain_on_flush) { | |
4113 | b->in_flush = true; | |
4114 | cb = bench_cb; | |
4115 | } else { | |
4116 | cb = bench_undrained_flush_cb; | |
4117 | } | |
4118 | ||
4119 | acb = blk_aio_flush(b->blk, cb, b); | |
4120 | if (!acb) { | |
4121 | error_report("Failed to issue flush request"); | |
4122 | exit(EXIT_FAILURE); | |
4123 | } | |
4124 | } | |
4125 | if (b->drain_on_flush) { | |
4126 | return; | |
4127 | } | |
4128 | } | |
4129 | } | |
4130 | ||
4131 | while (b->n > b->in_flight && b->in_flight < b->nrreq) { | |
4132 | int64_t offset = b->offset; | |
4133 | /* blk_aio_* might look for completed I/Os and kick bench_cb | |
4134 | * again, so make sure this operation is counted by in_flight | |
4135 | * and b->offset is ready for the next submission. | |
4136 | */ | |
4137 | b->in_flight++; | |
4138 | b->offset += b->step; | |
4139 | b->offset %= b->image_size; | |
4140 | if (b->write) { | |
4141 | acb = blk_aio_pwritev(b->blk, offset, b->qiov, 0, bench_cb, b); | |
4142 | } else { | |
4143 | acb = blk_aio_preadv(b->blk, offset, b->qiov, 0, bench_cb, b); | |
4144 | } | |
4145 | if (!acb) { | |
4146 | error_report("Failed to issue request"); | |
4147 | exit(EXIT_FAILURE); | |
4148 | } | |
4149 | } | |
4150 | } | |
4151 | ||
4152 | static int img_bench(int argc, char **argv) | |
4153 | { | |
4154 | int c, ret = 0; | |
4155 | const char *fmt = NULL, *filename; | |
4156 | bool quiet = false; | |
4157 | bool image_opts = false; | |
4158 | bool is_write = false; | |
4159 | int count = 75000; | |
4160 | int depth = 64; | |
4161 | int64_t offset = 0; | |
4162 | size_t bufsize = 4096; | |
4163 | int pattern = 0; | |
4164 | size_t step = 0; | |
4165 | int flush_interval = 0; | |
4166 | bool drain_on_flush = true; | |
4167 | int64_t image_size; | |
4168 | BlockBackend *blk = NULL; | |
4169 | BenchData data = {}; | |
4170 | int flags = 0; | |
4171 | bool writethrough = false; | |
4172 | struct timeval t1, t2; | |
4173 | int i; | |
4174 | bool force_share = false; | |
4175 | size_t buf_size; | |
4176 | ||
4177 | for (;;) { | |
4178 | static const struct option long_options[] = { | |
4179 | {"help", no_argument, 0, 'h'}, | |
4180 | {"flush-interval", required_argument, 0, OPTION_FLUSH_INTERVAL}, | |
4181 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
4182 | {"pattern", required_argument, 0, OPTION_PATTERN}, | |
4183 | {"no-drain", no_argument, 0, OPTION_NO_DRAIN}, | |
4184 | {"force-share", no_argument, 0, 'U'}, | |
4185 | {0, 0, 0, 0} | |
4186 | }; | |
4187 | c = getopt_long(argc, argv, ":hc:d:f:no:qs:S:t:wU", long_options, NULL); | |
4188 | if (c == -1) { | |
4189 | break; | |
4190 | } | |
4191 | ||
4192 | switch (c) { | |
4193 | case ':': | |
4194 | missing_argument(argv[optind - 1]); | |
4195 | break; | |
4196 | case '?': | |
4197 | unrecognized_option(argv[optind - 1]); | |
4198 | break; | |
4199 | case 'h': | |
4200 | help(); | |
4201 | break; | |
4202 | case 'c': | |
4203 | { | |
4204 | unsigned long res; | |
4205 | ||
4206 | if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) { | |
4207 | error_report("Invalid request count specified"); | |
4208 | return 1; | |
4209 | } | |
4210 | count = res; | |
4211 | break; | |
4212 | } | |
4213 | case 'd': | |
4214 | { | |
4215 | unsigned long res; | |
4216 | ||
4217 | if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) { | |
4218 | error_report("Invalid queue depth specified"); | |
4219 | return 1; | |
4220 | } | |
4221 | depth = res; | |
4222 | break; | |
4223 | } | |
4224 | case 'f': | |
4225 | fmt = optarg; | |
4226 | break; | |
4227 | case 'n': | |
4228 | flags |= BDRV_O_NATIVE_AIO; | |
4229 | break; | |
4230 | case 'o': | |
4231 | { | |
4232 | offset = cvtnum(optarg); | |
4233 | if (offset < 0) { | |
4234 | error_report("Invalid offset specified"); | |
4235 | return 1; | |
4236 | } | |
4237 | break; | |
4238 | } | |
4239 | break; | |
4240 | case 'q': | |
4241 | quiet = true; | |
4242 | break; | |
4243 | case 's': | |
4244 | { | |
4245 | int64_t sval; | |
4246 | ||
4247 | sval = cvtnum(optarg); | |
4248 | if (sval < 0 || sval > INT_MAX) { | |
4249 | error_report("Invalid buffer size specified"); | |
4250 | return 1; | |
4251 | } | |
4252 | ||
4253 | bufsize = sval; | |
4254 | break; | |
4255 | } | |
4256 | case 'S': | |
4257 | { | |
4258 | int64_t sval; | |
4259 | ||
4260 | sval = cvtnum(optarg); | |
4261 | if (sval < 0 || sval > INT_MAX) { | |
4262 | error_report("Invalid step size specified"); | |
4263 | return 1; | |
4264 | } | |
4265 | ||
4266 | step = sval; | |
4267 | break; | |
4268 | } | |
4269 | case 't': | |
4270 | ret = bdrv_parse_cache_mode(optarg, &flags, &writethrough); | |
4271 | if (ret < 0) { | |
4272 | error_report("Invalid cache mode"); | |
4273 | ret = -1; | |
4274 | goto out; | |
4275 | } | |
4276 | break; | |
4277 | case 'w': | |
4278 | flags |= BDRV_O_RDWR; | |
4279 | is_write = true; | |
4280 | break; | |
4281 | case 'U': | |
4282 | force_share = true; | |
4283 | break; | |
4284 | case OPTION_PATTERN: | |
4285 | { | |
4286 | unsigned long res; | |
4287 | ||
4288 | if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > 0xff) { | |
4289 | error_report("Invalid pattern byte specified"); | |
4290 | return 1; | |
4291 | } | |
4292 | pattern = res; | |
4293 | break; | |
4294 | } | |
4295 | case OPTION_FLUSH_INTERVAL: | |
4296 | { | |
4297 | unsigned long res; | |
4298 | ||
4299 | if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) { | |
4300 | error_report("Invalid flush interval specified"); | |
4301 | return 1; | |
4302 | } | |
4303 | flush_interval = res; | |
4304 | break; | |
4305 | } | |
4306 | case OPTION_NO_DRAIN: | |
4307 | drain_on_flush = false; | |
4308 | break; | |
4309 | case OPTION_IMAGE_OPTS: | |
4310 | image_opts = true; | |
4311 | break; | |
4312 | } | |
4313 | } | |
4314 | ||
4315 | if (optind != argc - 1) { | |
4316 | error_exit("Expecting one image file name"); | |
4317 | } | |
4318 | filename = argv[argc - 1]; | |
4319 | ||
4320 | if (!is_write && flush_interval) { | |
4321 | error_report("--flush-interval is only available in write tests"); | |
4322 | ret = -1; | |
4323 | goto out; | |
4324 | } | |
4325 | if (flush_interval && flush_interval < depth) { | |
4326 | error_report("Flush interval can't be smaller than depth"); | |
4327 | ret = -1; | |
4328 | goto out; | |
4329 | } | |
4330 | ||
4331 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, | |
4332 | force_share); | |
4333 | if (!blk) { | |
4334 | ret = -1; | |
4335 | goto out; | |
4336 | } | |
4337 | ||
4338 | image_size = blk_getlength(blk); | |
4339 | if (image_size < 0) { | |
4340 | ret = image_size; | |
4341 | goto out; | |
4342 | } | |
4343 | ||
4344 | data = (BenchData) { | |
4345 | .blk = blk, | |
4346 | .image_size = image_size, | |
4347 | .bufsize = bufsize, | |
4348 | .step = step ?: bufsize, | |
4349 | .nrreq = depth, | |
4350 | .n = count, | |
4351 | .offset = offset, | |
4352 | .write = is_write, | |
4353 | .flush_interval = flush_interval, | |
4354 | .drain_on_flush = drain_on_flush, | |
4355 | }; | |
4356 | printf("Sending %d %s requests, %d bytes each, %d in parallel " | |
4357 | "(starting at offset %" PRId64 ", step size %d)\n", | |
4358 | data.n, data.write ? "write" : "read", data.bufsize, data.nrreq, | |
4359 | data.offset, data.step); | |
4360 | if (flush_interval) { | |
4361 | printf("Sending flush every %d requests\n", flush_interval); | |
4362 | } | |
4363 | ||
4364 | buf_size = data.nrreq * data.bufsize; | |
4365 | data.buf = blk_blockalign(blk, buf_size); | |
4366 | memset(data.buf, pattern, data.nrreq * data.bufsize); | |
4367 | ||
4368 | blk_register_buf(blk, data.buf, buf_size); | |
4369 | ||
4370 | data.qiov = g_new(QEMUIOVector, data.nrreq); | |
4371 | for (i = 0; i < data.nrreq; i++) { | |
4372 | qemu_iovec_init(&data.qiov[i], 1); | |
4373 | qemu_iovec_add(&data.qiov[i], | |
4374 | data.buf + i * data.bufsize, data.bufsize); | |
4375 | } | |
4376 | ||
4377 | gettimeofday(&t1, NULL); | |
4378 | bench_cb(&data, 0); | |
4379 | ||
4380 | while (data.n > 0) { | |
4381 | main_loop_wait(false); | |
4382 | } | |
4383 | gettimeofday(&t2, NULL); | |
4384 | ||
4385 | printf("Run completed in %3.3f seconds.\n", | |
4386 | (t2.tv_sec - t1.tv_sec) | |
4387 | + ((double)(t2.tv_usec - t1.tv_usec) / 1000000)); | |
4388 | ||
4389 | out: | |
4390 | if (data.buf) { | |
4391 | blk_unregister_buf(blk, data.buf); | |
4392 | } | |
4393 | qemu_vfree(data.buf); | |
4394 | blk_unref(blk); | |
4395 | ||
4396 | if (ret) { | |
4397 | return 1; | |
4398 | } | |
4399 | return 0; | |
4400 | } | |
4401 | ||
4402 | #define C_BS 01 | |
4403 | #define C_COUNT 02 | |
4404 | #define C_IF 04 | |
4405 | #define C_OF 010 | |
4406 | #define C_SKIP 020 | |
4407 | ||
4408 | struct DdInfo { | |
4409 | unsigned int flags; | |
4410 | int64_t count; | |
4411 | }; | |
4412 | ||
4413 | struct DdIo { | |
4414 | int bsz; /* Block size */ | |
4415 | char *filename; | |
4416 | uint8_t *buf; | |
4417 | int64_t offset; | |
4418 | }; | |
4419 | ||
4420 | struct DdOpts { | |
4421 | const char *name; | |
4422 | int (*f)(const char *, struct DdIo *, struct DdIo *, struct DdInfo *); | |
4423 | unsigned int flag; | |
4424 | }; | |
4425 | ||
4426 | static int img_dd_bs(const char *arg, | |
4427 | struct DdIo *in, struct DdIo *out, | |
4428 | struct DdInfo *dd) | |
4429 | { | |
4430 | int64_t res; | |
4431 | ||
4432 | res = cvtnum(arg); | |
4433 | ||
4434 | if (res <= 0 || res > INT_MAX) { | |
4435 | error_report("invalid number: '%s'", arg); | |
4436 | return 1; | |
4437 | } | |
4438 | in->bsz = out->bsz = res; | |
4439 | ||
4440 | return 0; | |
4441 | } | |
4442 | ||
4443 | static int img_dd_count(const char *arg, | |
4444 | struct DdIo *in, struct DdIo *out, | |
4445 | struct DdInfo *dd) | |
4446 | { | |
4447 | dd->count = cvtnum(arg); | |
4448 | ||
4449 | if (dd->count < 0) { | |
4450 | error_report("invalid number: '%s'", arg); | |
4451 | return 1; | |
4452 | } | |
4453 | ||
4454 | return 0; | |
4455 | } | |
4456 | ||
4457 | static int img_dd_if(const char *arg, | |
4458 | struct DdIo *in, struct DdIo *out, | |
4459 | struct DdInfo *dd) | |
4460 | { | |
4461 | in->filename = g_strdup(arg); | |
4462 | ||
4463 | return 0; | |
4464 | } | |
4465 | ||
4466 | static int img_dd_of(const char *arg, | |
4467 | struct DdIo *in, struct DdIo *out, | |
4468 | struct DdInfo *dd) | |
4469 | { | |
4470 | out->filename = g_strdup(arg); | |
4471 | ||
4472 | return 0; | |
4473 | } | |
4474 | ||
4475 | static int img_dd_skip(const char *arg, | |
4476 | struct DdIo *in, struct DdIo *out, | |
4477 | struct DdInfo *dd) | |
4478 | { | |
4479 | in->offset = cvtnum(arg); | |
4480 | ||
4481 | if (in->offset < 0) { | |
4482 | error_report("invalid number: '%s'", arg); | |
4483 | return 1; | |
4484 | } | |
4485 | ||
4486 | return 0; | |
4487 | } | |
4488 | ||
4489 | static int img_dd(int argc, char **argv) | |
4490 | { | |
4491 | int ret = 0; | |
4492 | char *arg = NULL; | |
4493 | char *tmp; | |
4494 | BlockDriver *drv = NULL, *proto_drv = NULL; | |
4495 | BlockBackend *blk1 = NULL, *blk2 = NULL; | |
4496 | QemuOpts *opts = NULL; | |
4497 | QemuOptsList *create_opts = NULL; | |
4498 | Error *local_err = NULL; | |
4499 | bool image_opts = false; | |
4500 | int c, i; | |
4501 | const char *out_fmt = "raw"; | |
4502 | const char *fmt = NULL; | |
4503 | int64_t size = 0; | |
4504 | int64_t block_count = 0, out_pos, in_pos; | |
4505 | bool force_share = false; | |
4506 | struct DdInfo dd = { | |
4507 | .flags = 0, | |
4508 | .count = 0, | |
4509 | }; | |
4510 | struct DdIo in = { | |
4511 | .bsz = 512, /* Block size is by default 512 bytes */ | |
4512 | .filename = NULL, | |
4513 | .buf = NULL, | |
4514 | .offset = 0 | |
4515 | }; | |
4516 | struct DdIo out = { | |
4517 | .bsz = 512, | |
4518 | .filename = NULL, | |
4519 | .buf = NULL, | |
4520 | .offset = 0 | |
4521 | }; | |
4522 | ||
4523 | const struct DdOpts options[] = { | |
4524 | { "bs", img_dd_bs, C_BS }, | |
4525 | { "count", img_dd_count, C_COUNT }, | |
4526 | { "if", img_dd_if, C_IF }, | |
4527 | { "of", img_dd_of, C_OF }, | |
4528 | { "skip", img_dd_skip, C_SKIP }, | |
4529 | { NULL, NULL, 0 } | |
4530 | }; | |
4531 | const struct option long_options[] = { | |
4532 | { "help", no_argument, 0, 'h'}, | |
4533 | { "object", required_argument, 0, OPTION_OBJECT}, | |
4534 | { "image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
4535 | { "force-share", no_argument, 0, 'U'}, | |
4536 | { 0, 0, 0, 0 } | |
4537 | }; | |
4538 | ||
4539 | while ((c = getopt_long(argc, argv, ":hf:O:U", long_options, NULL))) { | |
4540 | if (c == EOF) { | |
4541 | break; | |
4542 | } | |
4543 | switch (c) { | |
4544 | case 'O': | |
4545 | out_fmt = optarg; | |
4546 | break; | |
4547 | case 'f': | |
4548 | fmt = optarg; | |
4549 | break; | |
4550 | case ':': | |
4551 | missing_argument(argv[optind - 1]); | |
4552 | break; | |
4553 | case '?': | |
4554 | unrecognized_option(argv[optind - 1]); | |
4555 | break; | |
4556 | case 'h': | |
4557 | help(); | |
4558 | break; | |
4559 | case 'U': | |
4560 | force_share = true; | |
4561 | break; | |
4562 | case OPTION_OBJECT: | |
4563 | if (!qemu_opts_parse_noisily(&qemu_object_opts, optarg, true)) { | |
4564 | ret = -1; | |
4565 | goto out; | |
4566 | } | |
4567 | break; | |
4568 | case OPTION_IMAGE_OPTS: | |
4569 | image_opts = true; | |
4570 | break; | |
4571 | } | |
4572 | } | |
4573 | ||
4574 | for (i = optind; i < argc; i++) { | |
4575 | int j; | |
4576 | arg = g_strdup(argv[i]); | |
4577 | ||
4578 | tmp = strchr(arg, '='); | |
4579 | if (tmp == NULL) { | |
4580 | error_report("unrecognized operand %s", arg); | |
4581 | ret = -1; | |
4582 | goto out; | |
4583 | } | |
4584 | ||
4585 | *tmp++ = '\0'; | |
4586 | ||
4587 | for (j = 0; options[j].name != NULL; j++) { | |
4588 | if (!strcmp(arg, options[j].name)) { | |
4589 | break; | |
4590 | } | |
4591 | } | |
4592 | if (options[j].name == NULL) { | |
4593 | error_report("unrecognized operand %s", arg); | |
4594 | ret = -1; | |
4595 | goto out; | |
4596 | } | |
4597 | ||
4598 | if (options[j].f(tmp, &in, &out, &dd) != 0) { | |
4599 | ret = -1; | |
4600 | goto out; | |
4601 | } | |
4602 | dd.flags |= options[j].flag; | |
4603 | g_free(arg); | |
4604 | arg = NULL; | |
4605 | } | |
4606 | ||
4607 | if (!(dd.flags & C_IF && dd.flags & C_OF)) { | |
4608 | error_report("Must specify both input and output files"); | |
4609 | ret = -1; | |
4610 | goto out; | |
4611 | } | |
4612 | ||
4613 | if (qemu_opts_foreach(&qemu_object_opts, | |
4614 | user_creatable_add_opts_foreach, | |
4615 | qemu_img_object_print_help, &error_fatal)) { | |
4616 | ret = -1; | |
4617 | goto out; | |
4618 | } | |
4619 | ||
4620 | blk1 = img_open(image_opts, in.filename, fmt, 0, false, false, | |
4621 | force_share); | |
4622 | ||
4623 | if (!blk1) { | |
4624 | ret = -1; | |
4625 | goto out; | |
4626 | } | |
4627 | ||
4628 | drv = bdrv_find_format(out_fmt); | |
4629 | if (!drv) { | |
4630 | error_report("Unknown file format"); | |
4631 | ret = -1; | |
4632 | goto out; | |
4633 | } | |
4634 | proto_drv = bdrv_find_protocol(out.filename, true, &local_err); | |
4635 | ||
4636 | if (!proto_drv) { | |
4637 | error_report_err(local_err); | |
4638 | ret = -1; | |
4639 | goto out; | |
4640 | } | |
4641 | if (!drv->create_opts) { | |
4642 | error_report("Format driver '%s' does not support image creation", | |
4643 | drv->format_name); | |
4644 | ret = -1; | |
4645 | goto out; | |
4646 | } | |
4647 | if (!proto_drv->create_opts) { | |
4648 | error_report("Protocol driver '%s' does not support image creation", | |
4649 | proto_drv->format_name); | |
4650 | ret = -1; | |
4651 | goto out; | |
4652 | } | |
4653 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
4654 | create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); | |
4655 | ||
4656 | opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); | |
4657 | ||
4658 | size = blk_getlength(blk1); | |
4659 | if (size < 0) { | |
4660 | error_report("Failed to get size for '%s'", in.filename); | |
4661 | ret = -1; | |
4662 | goto out; | |
4663 | } | |
4664 | ||
4665 | if (dd.flags & C_COUNT && dd.count <= INT64_MAX / in.bsz && | |
4666 | dd.count * in.bsz < size) { | |
4667 | size = dd.count * in.bsz; | |
4668 | } | |
4669 | ||
4670 | /* Overflow means the specified offset is beyond input image's size */ | |
4671 | if (dd.flags & C_SKIP && (in.offset > INT64_MAX / in.bsz || | |
4672 | size < in.bsz * in.offset)) { | |
4673 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, 0, &error_abort); | |
4674 | } else { | |
4675 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, | |
4676 | size - in.bsz * in.offset, &error_abort); | |
4677 | } | |
4678 | ||
4679 | ret = bdrv_create(drv, out.filename, opts, &local_err); | |
4680 | if (ret < 0) { | |
4681 | error_reportf_err(local_err, | |
4682 | "%s: error while creating output image: ", | |
4683 | out.filename); | |
4684 | ret = -1; | |
4685 | goto out; | |
4686 | } | |
4687 | ||
4688 | /* TODO, we can't honour --image-opts for the target, | |
4689 | * since it needs to be given in a format compatible | |
4690 | * with the bdrv_create() call above which does not | |
4691 | * support image-opts style. | |
4692 | */ | |
4693 | blk2 = img_open_file(out.filename, NULL, out_fmt, BDRV_O_RDWR, | |
4694 | false, false, false); | |
4695 | ||
4696 | if (!blk2) { | |
4697 | ret = -1; | |
4698 | goto out; | |
4699 | } | |
4700 | ||
4701 | if (dd.flags & C_SKIP && (in.offset > INT64_MAX / in.bsz || | |
4702 | size < in.offset * in.bsz)) { | |
4703 | /* We give a warning if the skip option is bigger than the input | |
4704 | * size and create an empty output disk image (i.e. like dd(1)). | |
4705 | */ | |
4706 | error_report("%s: cannot skip to specified offset", in.filename); | |
4707 | in_pos = size; | |
4708 | } else { | |
4709 | in_pos = in.offset * in.bsz; | |
4710 | } | |
4711 | ||
4712 | in.buf = g_new(uint8_t, in.bsz); | |
4713 | ||
4714 | for (out_pos = 0; in_pos < size; block_count++) { | |
4715 | int in_ret, out_ret; | |
4716 | ||
4717 | if (in_pos + in.bsz > size) { | |
4718 | in_ret = blk_pread(blk1, in_pos, in.buf, size - in_pos); | |
4719 | } else { | |
4720 | in_ret = blk_pread(blk1, in_pos, in.buf, in.bsz); | |
4721 | } | |
4722 | if (in_ret < 0) { | |
4723 | error_report("error while reading from input image file: %s", | |
4724 | strerror(-in_ret)); | |
4725 | ret = -1; | |
4726 | goto out; | |
4727 | } | |
4728 | in_pos += in_ret; | |
4729 | ||
4730 | out_ret = blk_pwrite(blk2, out_pos, in.buf, in_ret, 0); | |
4731 | ||
4732 | if (out_ret < 0) { | |
4733 | error_report("error while writing to output image file: %s", | |
4734 | strerror(-out_ret)); | |
4735 | ret = -1; | |
4736 | goto out; | |
4737 | } | |
4738 | out_pos += out_ret; | |
4739 | } | |
4740 | ||
4741 | out: | |
4742 | g_free(arg); | |
4743 | qemu_opts_del(opts); | |
4744 | qemu_opts_free(create_opts); | |
4745 | blk_unref(blk1); | |
4746 | blk_unref(blk2); | |
4747 | g_free(in.filename); | |
4748 | g_free(out.filename); | |
4749 | g_free(in.buf); | |
4750 | g_free(out.buf); | |
4751 | ||
4752 | if (ret) { | |
4753 | return 1; | |
4754 | } | |
4755 | return 0; | |
4756 | } | |
4757 | ||
4758 | static void dump_json_block_measure_info(BlockMeasureInfo *info) | |
4759 | { | |
4760 | QString *str; | |
4761 | QObject *obj; | |
4762 | Visitor *v = qobject_output_visitor_new(&obj); | |
4763 | ||
4764 | visit_type_BlockMeasureInfo(v, NULL, &info, &error_abort); | |
4765 | visit_complete(v, &obj); | |
4766 | str = qobject_to_json_pretty(obj); | |
4767 | assert(str != NULL); | |
4768 | printf("%s\n", qstring_get_str(str)); | |
4769 | qobject_unref(obj); | |
4770 | visit_free(v); | |
4771 | qobject_unref(str); | |
4772 | } | |
4773 | ||
4774 | static int img_measure(int argc, char **argv) | |
4775 | { | |
4776 | static const struct option long_options[] = { | |
4777 | {"help", no_argument, 0, 'h'}, | |
4778 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
4779 | {"object", required_argument, 0, OPTION_OBJECT}, | |
4780 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
4781 | {"size", required_argument, 0, OPTION_SIZE}, | |
4782 | {"force-share", no_argument, 0, 'U'}, | |
4783 | {0, 0, 0, 0} | |
4784 | }; | |
4785 | OutputFormat output_format = OFORMAT_HUMAN; | |
4786 | BlockBackend *in_blk = NULL; | |
4787 | BlockDriver *drv; | |
4788 | const char *filename = NULL; | |
4789 | const char *fmt = NULL; | |
4790 | const char *out_fmt = "raw"; | |
4791 | char *options = NULL; | |
4792 | char *snapshot_name = NULL; | |
4793 | bool force_share = false; | |
4794 | QemuOpts *opts = NULL; | |
4795 | QemuOpts *object_opts = NULL; | |
4796 | QemuOpts *sn_opts = NULL; | |
4797 | QemuOptsList *create_opts = NULL; | |
4798 | bool image_opts = false; | |
4799 | uint64_t img_size = UINT64_MAX; | |
4800 | BlockMeasureInfo *info = NULL; | |
4801 | Error *local_err = NULL; | |
4802 | int ret = 1; | |
4803 | int c; | |
4804 | ||
4805 | while ((c = getopt_long(argc, argv, "hf:O:o:l:U", | |
4806 | long_options, NULL)) != -1) { | |
4807 | switch (c) { | |
4808 | case '?': | |
4809 | case 'h': | |
4810 | help(); | |
4811 | break; | |
4812 | case 'f': | |
4813 | fmt = optarg; | |
4814 | break; | |
4815 | case 'O': | |
4816 | out_fmt = optarg; | |
4817 | break; | |
4818 | case 'o': | |
4819 | if (!is_valid_option_list(optarg)) { | |
4820 | error_report("Invalid option list: %s", optarg); | |
4821 | goto out; | |
4822 | } | |
4823 | if (!options) { | |
4824 | options = g_strdup(optarg); | |
4825 | } else { | |
4826 | char *old_options = options; | |
4827 | options = g_strdup_printf("%s,%s", options, optarg); | |
4828 | g_free(old_options); | |
4829 | } | |
4830 | break; | |
4831 | case 'l': | |
4832 | if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { | |
4833 | sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, | |
4834 | optarg, false); | |
4835 | if (!sn_opts) { | |
4836 | error_report("Failed in parsing snapshot param '%s'", | |
4837 | optarg); | |
4838 | goto out; | |
4839 | } | |
4840 | } else { | |
4841 | snapshot_name = optarg; | |
4842 | } | |
4843 | break; | |
4844 | case 'U': | |
4845 | force_share = true; | |
4846 | break; | |
4847 | case OPTION_OBJECT: | |
4848 | object_opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
4849 | optarg, true); | |
4850 | if (!object_opts) { | |
4851 | goto out; | |
4852 | } | |
4853 | break; | |
4854 | case OPTION_IMAGE_OPTS: | |
4855 | image_opts = true; | |
4856 | break; | |
4857 | case OPTION_OUTPUT: | |
4858 | if (!strcmp(optarg, "json")) { | |
4859 | output_format = OFORMAT_JSON; | |
4860 | } else if (!strcmp(optarg, "human")) { | |
4861 | output_format = OFORMAT_HUMAN; | |
4862 | } else { | |
4863 | error_report("--output must be used with human or json " | |
4864 | "as argument."); | |
4865 | goto out; | |
4866 | } | |
4867 | break; | |
4868 | case OPTION_SIZE: | |
4869 | { | |
4870 | int64_t sval; | |
4871 | ||
4872 | sval = cvtnum(optarg); | |
4873 | if (sval < 0) { | |
4874 | if (sval == -ERANGE) { | |
4875 | error_report("Image size must be less than 8 EiB!"); | |
4876 | } else { | |
4877 | error_report("Invalid image size specified! You may use " | |
4878 | "k, M, G, T, P or E suffixes for "); | |
4879 | error_report("kilobytes, megabytes, gigabytes, terabytes, " | |
4880 | "petabytes and exabytes."); | |
4881 | } | |
4882 | goto out; | |
4883 | } | |
4884 | img_size = (uint64_t)sval; | |
4885 | } | |
4886 | break; | |
4887 | } | |
4888 | } | |
4889 | ||
4890 | if (qemu_opts_foreach(&qemu_object_opts, | |
4891 | user_creatable_add_opts_foreach, | |
4892 | qemu_img_object_print_help, &error_fatal)) { | |
4893 | goto out; | |
4894 | } | |
4895 | ||
4896 | if (argc - optind > 1) { | |
4897 | error_report("At most one filename argument is allowed."); | |
4898 | goto out; | |
4899 | } else if (argc - optind == 1) { | |
4900 | filename = argv[optind]; | |
4901 | } | |
4902 | ||
4903 | if (!filename && | |
4904 | (object_opts || image_opts || fmt || snapshot_name || sn_opts)) { | |
4905 | error_report("--object, --image-opts, -f, and -l " | |
4906 | "require a filename argument."); | |
4907 | goto out; | |
4908 | } | |
4909 | if (filename && img_size != UINT64_MAX) { | |
4910 | error_report("--size N cannot be used together with a filename."); | |
4911 | goto out; | |
4912 | } | |
4913 | if (!filename && img_size == UINT64_MAX) { | |
4914 | error_report("Either --size N or one filename must be specified."); | |
4915 | goto out; | |
4916 | } | |
4917 | ||
4918 | if (filename) { | |
4919 | in_blk = img_open(image_opts, filename, fmt, 0, | |
4920 | false, false, force_share); | |
4921 | if (!in_blk) { | |
4922 | goto out; | |
4923 | } | |
4924 | ||
4925 | if (sn_opts) { | |
4926 | bdrv_snapshot_load_tmp(blk_bs(in_blk), | |
4927 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), | |
4928 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), | |
4929 | &local_err); | |
4930 | } else if (snapshot_name != NULL) { | |
4931 | bdrv_snapshot_load_tmp_by_id_or_name(blk_bs(in_blk), | |
4932 | snapshot_name, &local_err); | |
4933 | } | |
4934 | if (local_err) { | |
4935 | error_reportf_err(local_err, "Failed to load snapshot: "); | |
4936 | goto out; | |
4937 | } | |
4938 | } | |
4939 | ||
4940 | drv = bdrv_find_format(out_fmt); | |
4941 | if (!drv) { | |
4942 | error_report("Unknown file format '%s'", out_fmt); | |
4943 | goto out; | |
4944 | } | |
4945 | if (!drv->create_opts) { | |
4946 | error_report("Format driver '%s' does not support image creation", | |
4947 | drv->format_name); | |
4948 | goto out; | |
4949 | } | |
4950 | ||
4951 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
4952 | create_opts = qemu_opts_append(create_opts, bdrv_file.create_opts); | |
4953 | opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); | |
4954 | if (options) { | |
4955 | qemu_opts_do_parse(opts, options, NULL, &local_err); | |
4956 | if (local_err) { | |
4957 | error_report_err(local_err); | |
4958 | error_report("Invalid options for file format '%s'", out_fmt); | |
4959 | goto out; | |
4960 | } | |
4961 | } | |
4962 | if (img_size != UINT64_MAX) { | |
4963 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, img_size, &error_abort); | |
4964 | } | |
4965 | ||
4966 | info = bdrv_measure(drv, opts, in_blk ? blk_bs(in_blk) : NULL, &local_err); | |
4967 | if (local_err) { | |
4968 | error_report_err(local_err); | |
4969 | goto out; | |
4970 | } | |
4971 | ||
4972 | if (output_format == OFORMAT_HUMAN) { | |
4973 | printf("required size: %" PRIu64 "\n", info->required); | |
4974 | printf("fully allocated size: %" PRIu64 "\n", info->fully_allocated); | |
4975 | } else { | |
4976 | dump_json_block_measure_info(info); | |
4977 | } | |
4978 | ||
4979 | ret = 0; | |
4980 | ||
4981 | out: | |
4982 | qapi_free_BlockMeasureInfo(info); | |
4983 | qemu_opts_del(object_opts); | |
4984 | qemu_opts_del(opts); | |
4985 | qemu_opts_del(sn_opts); | |
4986 | qemu_opts_free(create_opts); | |
4987 | g_free(options); | |
4988 | blk_unref(in_blk); | |
4989 | return ret; | |
4990 | } | |
4991 | ||
4992 | static const img_cmd_t img_cmds[] = { | |
4993 | #define DEF(option, callback, arg_string) \ | |
4994 | { option, callback }, | |
4995 | #include "qemu-img-cmds.h" | |
4996 | #undef DEF | |
4997 | { NULL, NULL, }, | |
4998 | }; | |
4999 | ||
5000 | int main(int argc, char **argv) | |
5001 | { | |
5002 | const img_cmd_t *cmd; | |
5003 | const char *cmdname; | |
5004 | Error *local_error = NULL; | |
5005 | char *trace_file = NULL; | |
5006 | int c; | |
5007 | static const struct option long_options[] = { | |
5008 | {"help", no_argument, 0, 'h'}, | |
5009 | {"version", no_argument, 0, 'V'}, | |
5010 | {"trace", required_argument, NULL, 'T'}, | |
5011 | {0, 0, 0, 0} | |
5012 | }; | |
5013 | ||
5014 | #ifdef CONFIG_POSIX | |
5015 | signal(SIGPIPE, SIG_IGN); | |
5016 | #endif | |
5017 | ||
5018 | error_init(argv[0]); | |
5019 | module_call_init(MODULE_INIT_TRACE); | |
5020 | qemu_init_exec_dir(argv[0]); | |
5021 | ||
5022 | if (qemu_init_main_loop(&local_error)) { | |
5023 | error_report_err(local_error); | |
5024 | exit(EXIT_FAILURE); | |
5025 | } | |
5026 | ||
5027 | qcrypto_init(&error_fatal); | |
5028 | ||
5029 | module_call_init(MODULE_INIT_QOM); | |
5030 | bdrv_init(); | |
5031 | if (argc < 2) { | |
5032 | error_exit("Not enough arguments"); | |
5033 | } | |
5034 | ||
5035 | qemu_add_opts(&qemu_object_opts); | |
5036 | qemu_add_opts(&qemu_source_opts); | |
5037 | qemu_add_opts(&qemu_trace_opts); | |
5038 | ||
5039 | while ((c = getopt_long(argc, argv, "+:hVT:", long_options, NULL)) != -1) { | |
5040 | switch (c) { | |
5041 | case ':': | |
5042 | missing_argument(argv[optind - 1]); | |
5043 | return 0; | |
5044 | case '?': | |
5045 | unrecognized_option(argv[optind - 1]); | |
5046 | return 0; | |
5047 | case 'h': | |
5048 | help(); | |
5049 | return 0; | |
5050 | case 'V': | |
5051 | printf(QEMU_IMG_VERSION); | |
5052 | return 0; | |
5053 | case 'T': | |
5054 | g_free(trace_file); | |
5055 | trace_file = trace_opt_parse(optarg); | |
5056 | break; | |
5057 | } | |
5058 | } | |
5059 | ||
5060 | cmdname = argv[optind]; | |
5061 | ||
5062 | /* reset getopt_long scanning */ | |
5063 | argc -= optind; | |
5064 | if (argc < 1) { | |
5065 | return 0; | |
5066 | } | |
5067 | argv += optind; | |
5068 | qemu_reset_optind(); | |
5069 | ||
5070 | if (!trace_init_backends()) { | |
5071 | exit(1); | |
5072 | } | |
5073 | trace_init_file(trace_file); | |
5074 | qemu_set_log(LOG_TRACE); | |
5075 | ||
5076 | /* find the command */ | |
5077 | for (cmd = img_cmds; cmd->name != NULL; cmd++) { | |
5078 | if (!strcmp(cmdname, cmd->name)) { | |
5079 | return cmd->handler(argc, argv); | |
5080 | } | |
5081 | } | |
5082 | ||
5083 | /* not found */ | |
5084 | error_exit("Command not found: %s", cmdname); | |
5085 | } |