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1 | /* | |
2 | * QEMU disk image utility | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | #include "qemu/osdep.h" | |
25 | #include "qemu-version.h" | |
26 | #include "qapi/error.h" | |
27 | #include "qapi-visit.h" | |
28 | #include "qapi/qmp-output-visitor.h" | |
29 | #include "qapi/qmp/qerror.h" | |
30 | #include "qapi/qmp/qjson.h" | |
31 | #include "qemu/cutils.h" | |
32 | #include "qemu/config-file.h" | |
33 | #include "qemu/option.h" | |
34 | #include "qemu/error-report.h" | |
35 | #include "qemu/log.h" | |
36 | #include "qom/object_interfaces.h" | |
37 | #include "sysemu/sysemu.h" | |
38 | #include "sysemu/block-backend.h" | |
39 | #include "block/block_int.h" | |
40 | #include "block/blockjob.h" | |
41 | #include "block/qapi.h" | |
42 | #include "crypto/init.h" | |
43 | #include "trace/control.h" | |
44 | #include <getopt.h> | |
45 | ||
46 | #define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \ | |
47 | ", " QEMU_COPYRIGHT "\n" | |
48 | ||
49 | typedef struct img_cmd_t { | |
50 | const char *name; | |
51 | int (*handler)(int argc, char **argv); | |
52 | } img_cmd_t; | |
53 | ||
54 | enum { | |
55 | OPTION_OUTPUT = 256, | |
56 | OPTION_BACKING_CHAIN = 257, | |
57 | OPTION_OBJECT = 258, | |
58 | OPTION_IMAGE_OPTS = 259, | |
59 | OPTION_PATTERN = 260, | |
60 | OPTION_FLUSH_INTERVAL = 261, | |
61 | OPTION_NO_DRAIN = 262, | |
62 | }; | |
63 | ||
64 | typedef enum OutputFormat { | |
65 | OFORMAT_JSON, | |
66 | OFORMAT_HUMAN, | |
67 | } OutputFormat; | |
68 | ||
69 | /* Default to cache=writeback as data integrity is not important for qemu-img */ | |
70 | #define BDRV_DEFAULT_CACHE "writeback" | |
71 | ||
72 | static void format_print(void *opaque, const char *name) | |
73 | { | |
74 | printf(" %s", name); | |
75 | } | |
76 | ||
77 | static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...) | |
78 | { | |
79 | va_list ap; | |
80 | ||
81 | error_printf("qemu-img: "); | |
82 | ||
83 | va_start(ap, fmt); | |
84 | error_vprintf(fmt, ap); | |
85 | va_end(ap); | |
86 | ||
87 | error_printf("\nTry 'qemu-img --help' for more information\n"); | |
88 | exit(EXIT_FAILURE); | |
89 | } | |
90 | ||
91 | /* Please keep in synch with qemu-img.texi */ | |
92 | static void QEMU_NORETURN help(void) | |
93 | { | |
94 | const char *help_msg = | |
95 | QEMU_IMG_VERSION | |
96 | "usage: qemu-img [standard options] command [command options]\n" | |
97 | "QEMU disk image utility\n" | |
98 | "\n" | |
99 | " '-h', '--help' display this help and exit\n" | |
100 | " '-V', '--version' output version information and exit\n" | |
101 | " '-T', '--trace' [[enable=]<pattern>][,events=<file>][,file=<file>]\n" | |
102 | " specify tracing options\n" | |
103 | "\n" | |
104 | "Command syntax:\n" | |
105 | #define DEF(option, callback, arg_string) \ | |
106 | " " arg_string "\n" | |
107 | #include "qemu-img-cmds.h" | |
108 | #undef DEF | |
109 | #undef GEN_DOCS | |
110 | "\n" | |
111 | "Command parameters:\n" | |
112 | " 'filename' is a disk image filename\n" | |
113 | " 'objectdef' is a QEMU user creatable object definition. See the qemu(1)\n" | |
114 | " manual page for a description of the object properties. The most common\n" | |
115 | " object type is a 'secret', which is used to supply passwords and/or\n" | |
116 | " encryption keys.\n" | |
117 | " 'fmt' is the disk image format. It is guessed automatically in most cases\n" | |
118 | " 'cache' is the cache mode used to write the output disk image, the valid\n" | |
119 | " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n" | |
120 | " 'directsync' and 'unsafe' (default for convert)\n" | |
121 | " 'src_cache' is the cache mode used to read input disk images, the valid\n" | |
122 | " options are the same as for the 'cache' option\n" | |
123 | " 'size' is the disk image size in bytes. Optional suffixes\n" | |
124 | " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n" | |
125 | " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n" | |
126 | " supported. 'b' is ignored.\n" | |
127 | " 'output_filename' is the destination disk image filename\n" | |
128 | " 'output_fmt' is the destination format\n" | |
129 | " 'options' is a comma separated list of format specific options in a\n" | |
130 | " name=value format. Use -o ? for an overview of the options supported by the\n" | |
131 | " used format\n" | |
132 | " 'snapshot_param' is param used for internal snapshot, format\n" | |
133 | " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" | |
134 | " '[ID_OR_NAME]'\n" | |
135 | " 'snapshot_id_or_name' is deprecated, use 'snapshot_param'\n" | |
136 | " instead\n" | |
137 | " '-c' indicates that target image must be compressed (qcow format only)\n" | |
138 | " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n" | |
139 | " match exactly. The image doesn't need a working backing file before\n" | |
140 | " rebasing in this case (useful for renaming the backing file)\n" | |
141 | " '-h' with or without a command shows this help and lists the supported formats\n" | |
142 | " '-p' show progress of command (only certain commands)\n" | |
143 | " '-q' use Quiet mode - do not print any output (except errors)\n" | |
144 | " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n" | |
145 | " contain only zeros for qemu-img to create a sparse image during\n" | |
146 | " conversion. If the number of bytes is 0, the source will not be scanned for\n" | |
147 | " unallocated or zero sectors, and the destination image will always be\n" | |
148 | " fully allocated\n" | |
149 | " '--output' takes the format in which the output must be done (human or json)\n" | |
150 | " '-n' skips the target volume creation (useful if the volume is created\n" | |
151 | " prior to running qemu-img)\n" | |
152 | "\n" | |
153 | "Parameters to check subcommand:\n" | |
154 | " '-r' tries to repair any inconsistencies that are found during the check.\n" | |
155 | " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n" | |
156 | " kinds of errors, with a higher risk of choosing the wrong fix or\n" | |
157 | " hiding corruption that has already occurred.\n" | |
158 | "\n" | |
159 | "Parameters to snapshot subcommand:\n" | |
160 | " 'snapshot' is the name of the snapshot to create, apply or delete\n" | |
161 | " '-a' applies a snapshot (revert disk to saved state)\n" | |
162 | " '-c' creates a snapshot\n" | |
163 | " '-d' deletes a snapshot\n" | |
164 | " '-l' lists all snapshots in the given image\n" | |
165 | "\n" | |
166 | "Parameters to compare subcommand:\n" | |
167 | " '-f' first image format\n" | |
168 | " '-F' second image format\n" | |
169 | " '-s' run in Strict mode - fail on different image size or sector allocation\n"; | |
170 | ||
171 | printf("%s\nSupported formats:", help_msg); | |
172 | bdrv_iterate_format(format_print, NULL); | |
173 | printf("\n"); | |
174 | exit(EXIT_SUCCESS); | |
175 | } | |
176 | ||
177 | static QemuOptsList qemu_object_opts = { | |
178 | .name = "object", | |
179 | .implied_opt_name = "qom-type", | |
180 | .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), | |
181 | .desc = { | |
182 | { } | |
183 | }, | |
184 | }; | |
185 | ||
186 | static QemuOptsList qemu_source_opts = { | |
187 | .name = "source", | |
188 | .implied_opt_name = "file", | |
189 | .head = QTAILQ_HEAD_INITIALIZER(qemu_source_opts.head), | |
190 | .desc = { | |
191 | { } | |
192 | }, | |
193 | }; | |
194 | ||
195 | static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...) | |
196 | { | |
197 | int ret = 0; | |
198 | if (!quiet) { | |
199 | va_list args; | |
200 | va_start(args, fmt); | |
201 | ret = vprintf(fmt, args); | |
202 | va_end(args); | |
203 | } | |
204 | return ret; | |
205 | } | |
206 | ||
207 | ||
208 | static int print_block_option_help(const char *filename, const char *fmt) | |
209 | { | |
210 | BlockDriver *drv, *proto_drv; | |
211 | QemuOptsList *create_opts = NULL; | |
212 | Error *local_err = NULL; | |
213 | ||
214 | /* Find driver and parse its options */ | |
215 | drv = bdrv_find_format(fmt); | |
216 | if (!drv) { | |
217 | error_report("Unknown file format '%s'", fmt); | |
218 | return 1; | |
219 | } | |
220 | ||
221 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
222 | if (filename) { | |
223 | proto_drv = bdrv_find_protocol(filename, true, &local_err); | |
224 | if (!proto_drv) { | |
225 | error_report_err(local_err); | |
226 | qemu_opts_free(create_opts); | |
227 | return 1; | |
228 | } | |
229 | create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); | |
230 | } | |
231 | ||
232 | qemu_opts_print_help(create_opts); | |
233 | qemu_opts_free(create_opts); | |
234 | return 0; | |
235 | } | |
236 | ||
237 | ||
238 | static int img_open_password(BlockBackend *blk, const char *filename, | |
239 | int flags, bool quiet) | |
240 | { | |
241 | BlockDriverState *bs; | |
242 | char password[256]; | |
243 | ||
244 | bs = blk_bs(blk); | |
245 | if (bdrv_is_encrypted(bs) && bdrv_key_required(bs) && | |
246 | !(flags & BDRV_O_NO_IO)) { | |
247 | qprintf(quiet, "Disk image '%s' is encrypted.\n", filename); | |
248 | if (qemu_read_password(password, sizeof(password)) < 0) { | |
249 | error_report("No password given"); | |
250 | return -1; | |
251 | } | |
252 | if (bdrv_set_key(bs, password) < 0) { | |
253 | error_report("invalid password"); | |
254 | return -1; | |
255 | } | |
256 | } | |
257 | return 0; | |
258 | } | |
259 | ||
260 | ||
261 | static BlockBackend *img_open_opts(const char *optstr, | |
262 | QemuOpts *opts, int flags, bool writethrough, | |
263 | bool quiet) | |
264 | { | |
265 | QDict *options; | |
266 | Error *local_err = NULL; | |
267 | BlockBackend *blk; | |
268 | options = qemu_opts_to_qdict(opts, NULL); | |
269 | blk = blk_new_open(NULL, NULL, options, flags, &local_err); | |
270 | if (!blk) { | |
271 | error_reportf_err(local_err, "Could not open '%s': ", optstr); | |
272 | return NULL; | |
273 | } | |
274 | blk_set_enable_write_cache(blk, !writethrough); | |
275 | ||
276 | if (img_open_password(blk, optstr, flags, quiet) < 0) { | |
277 | blk_unref(blk); | |
278 | return NULL; | |
279 | } | |
280 | return blk; | |
281 | } | |
282 | ||
283 | static BlockBackend *img_open_file(const char *filename, | |
284 | const char *fmt, int flags, | |
285 | bool writethrough, bool quiet) | |
286 | { | |
287 | BlockBackend *blk; | |
288 | Error *local_err = NULL; | |
289 | QDict *options = NULL; | |
290 | ||
291 | if (fmt) { | |
292 | options = qdict_new(); | |
293 | qdict_put(options, "driver", qstring_from_str(fmt)); | |
294 | } | |
295 | ||
296 | blk = blk_new_open(filename, NULL, options, flags, &local_err); | |
297 | if (!blk) { | |
298 | error_reportf_err(local_err, "Could not open '%s': ", filename); | |
299 | return NULL; | |
300 | } | |
301 | blk_set_enable_write_cache(blk, !writethrough); | |
302 | ||
303 | if (img_open_password(blk, filename, flags, quiet) < 0) { | |
304 | blk_unref(blk); | |
305 | return NULL; | |
306 | } | |
307 | return blk; | |
308 | } | |
309 | ||
310 | ||
311 | static BlockBackend *img_open(bool image_opts, | |
312 | const char *filename, | |
313 | const char *fmt, int flags, bool writethrough, | |
314 | bool quiet) | |
315 | { | |
316 | BlockBackend *blk; | |
317 | if (image_opts) { | |
318 | QemuOpts *opts; | |
319 | if (fmt) { | |
320 | error_report("--image-opts and --format are mutually exclusive"); | |
321 | return NULL; | |
322 | } | |
323 | opts = qemu_opts_parse_noisily(qemu_find_opts("source"), | |
324 | filename, true); | |
325 | if (!opts) { | |
326 | return NULL; | |
327 | } | |
328 | blk = img_open_opts(filename, opts, flags, writethrough, quiet); | |
329 | } else { | |
330 | blk = img_open_file(filename, fmt, flags, writethrough, quiet); | |
331 | } | |
332 | return blk; | |
333 | } | |
334 | ||
335 | ||
336 | static int add_old_style_options(const char *fmt, QemuOpts *opts, | |
337 | const char *base_filename, | |
338 | const char *base_fmt) | |
339 | { | |
340 | Error *err = NULL; | |
341 | ||
342 | if (base_filename) { | |
343 | qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, &err); | |
344 | if (err) { | |
345 | error_report("Backing file not supported for file format '%s'", | |
346 | fmt); | |
347 | error_free(err); | |
348 | return -1; | |
349 | } | |
350 | } | |
351 | if (base_fmt) { | |
352 | qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, &err); | |
353 | if (err) { | |
354 | error_report("Backing file format not supported for file " | |
355 | "format '%s'", fmt); | |
356 | error_free(err); | |
357 | return -1; | |
358 | } | |
359 | } | |
360 | return 0; | |
361 | } | |
362 | ||
363 | static int img_create(int argc, char **argv) | |
364 | { | |
365 | int c; | |
366 | uint64_t img_size = -1; | |
367 | const char *fmt = "raw"; | |
368 | const char *base_fmt = NULL; | |
369 | const char *filename; | |
370 | const char *base_filename = NULL; | |
371 | char *options = NULL; | |
372 | Error *local_err = NULL; | |
373 | bool quiet = false; | |
374 | ||
375 | for(;;) { | |
376 | static const struct option long_options[] = { | |
377 | {"help", no_argument, 0, 'h'}, | |
378 | {"object", required_argument, 0, OPTION_OBJECT}, | |
379 | {0, 0, 0, 0} | |
380 | }; | |
381 | c = getopt_long(argc, argv, "F:b:f:he6o:q", | |
382 | long_options, NULL); | |
383 | if (c == -1) { | |
384 | break; | |
385 | } | |
386 | switch(c) { | |
387 | case '?': | |
388 | case 'h': | |
389 | help(); | |
390 | break; | |
391 | case 'F': | |
392 | base_fmt = optarg; | |
393 | break; | |
394 | case 'b': | |
395 | base_filename = optarg; | |
396 | break; | |
397 | case 'f': | |
398 | fmt = optarg; | |
399 | break; | |
400 | case 'e': | |
401 | error_report("option -e is deprecated, please use \'-o " | |
402 | "encryption\' instead!"); | |
403 | goto fail; | |
404 | case '6': | |
405 | error_report("option -6 is deprecated, please use \'-o " | |
406 | "compat6\' instead!"); | |
407 | goto fail; | |
408 | case 'o': | |
409 | if (!is_valid_option_list(optarg)) { | |
410 | error_report("Invalid option list: %s", optarg); | |
411 | goto fail; | |
412 | } | |
413 | if (!options) { | |
414 | options = g_strdup(optarg); | |
415 | } else { | |
416 | char *old_options = options; | |
417 | options = g_strdup_printf("%s,%s", options, optarg); | |
418 | g_free(old_options); | |
419 | } | |
420 | break; | |
421 | case 'q': | |
422 | quiet = true; | |
423 | break; | |
424 | case OPTION_OBJECT: { | |
425 | QemuOpts *opts; | |
426 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
427 | optarg, true); | |
428 | if (!opts) { | |
429 | goto fail; | |
430 | } | |
431 | } break; | |
432 | } | |
433 | } | |
434 | ||
435 | /* Get the filename */ | |
436 | filename = (optind < argc) ? argv[optind] : NULL; | |
437 | if (options && has_help_option(options)) { | |
438 | g_free(options); | |
439 | return print_block_option_help(filename, fmt); | |
440 | } | |
441 | ||
442 | if (optind >= argc) { | |
443 | error_exit("Expecting image file name"); | |
444 | } | |
445 | optind++; | |
446 | ||
447 | if (qemu_opts_foreach(&qemu_object_opts, | |
448 | user_creatable_add_opts_foreach, | |
449 | NULL, NULL)) { | |
450 | goto fail; | |
451 | } | |
452 | ||
453 | /* Get image size, if specified */ | |
454 | if (optind < argc) { | |
455 | int64_t sval; | |
456 | char *end; | |
457 | sval = qemu_strtosz_suffix(argv[optind++], &end, | |
458 | QEMU_STRTOSZ_DEFSUFFIX_B); | |
459 | if (sval < 0 || *end) { | |
460 | if (sval == -ERANGE) { | |
461 | error_report("Image size must be less than 8 EiB!"); | |
462 | } else { | |
463 | error_report("Invalid image size specified! You may use k, M, " | |
464 | "G, T, P or E suffixes for "); | |
465 | error_report("kilobytes, megabytes, gigabytes, terabytes, " | |
466 | "petabytes and exabytes."); | |
467 | } | |
468 | goto fail; | |
469 | } | |
470 | img_size = (uint64_t)sval; | |
471 | } | |
472 | if (optind != argc) { | |
473 | error_exit("Unexpected argument: %s", argv[optind]); | |
474 | } | |
475 | ||
476 | bdrv_img_create(filename, fmt, base_filename, base_fmt, | |
477 | options, img_size, 0, &local_err, quiet); | |
478 | if (local_err) { | |
479 | error_reportf_err(local_err, "%s: ", filename); | |
480 | goto fail; | |
481 | } | |
482 | ||
483 | g_free(options); | |
484 | return 0; | |
485 | ||
486 | fail: | |
487 | g_free(options); | |
488 | return 1; | |
489 | } | |
490 | ||
491 | static void dump_json_image_check(ImageCheck *check, bool quiet) | |
492 | { | |
493 | QString *str; | |
494 | QObject *obj; | |
495 | Visitor *v = qmp_output_visitor_new(&obj); | |
496 | ||
497 | visit_type_ImageCheck(v, NULL, &check, &error_abort); | |
498 | visit_complete(v, &obj); | |
499 | str = qobject_to_json_pretty(obj); | |
500 | assert(str != NULL); | |
501 | qprintf(quiet, "%s\n", qstring_get_str(str)); | |
502 | qobject_decref(obj); | |
503 | visit_free(v); | |
504 | QDECREF(str); | |
505 | } | |
506 | ||
507 | static void dump_human_image_check(ImageCheck *check, bool quiet) | |
508 | { | |
509 | if (!(check->corruptions || check->leaks || check->check_errors)) { | |
510 | qprintf(quiet, "No errors were found on the image.\n"); | |
511 | } else { | |
512 | if (check->corruptions) { | |
513 | qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n" | |
514 | "Data may be corrupted, or further writes to the image " | |
515 | "may corrupt it.\n", | |
516 | check->corruptions); | |
517 | } | |
518 | ||
519 | if (check->leaks) { | |
520 | qprintf(quiet, | |
521 | "\n%" PRId64 " leaked clusters were found on the image.\n" | |
522 | "This means waste of disk space, but no harm to data.\n", | |
523 | check->leaks); | |
524 | } | |
525 | ||
526 | if (check->check_errors) { | |
527 | qprintf(quiet, | |
528 | "\n%" PRId64 | |
529 | " internal errors have occurred during the check.\n", | |
530 | check->check_errors); | |
531 | } | |
532 | } | |
533 | ||
534 | if (check->total_clusters != 0 && check->allocated_clusters != 0) { | |
535 | qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, " | |
536 | "%0.2f%% fragmented, %0.2f%% compressed clusters\n", | |
537 | check->allocated_clusters, check->total_clusters, | |
538 | check->allocated_clusters * 100.0 / check->total_clusters, | |
539 | check->fragmented_clusters * 100.0 / check->allocated_clusters, | |
540 | check->compressed_clusters * 100.0 / | |
541 | check->allocated_clusters); | |
542 | } | |
543 | ||
544 | if (check->image_end_offset) { | |
545 | qprintf(quiet, | |
546 | "Image end offset: %" PRId64 "\n", check->image_end_offset); | |
547 | } | |
548 | } | |
549 | ||
550 | static int collect_image_check(BlockDriverState *bs, | |
551 | ImageCheck *check, | |
552 | const char *filename, | |
553 | const char *fmt, | |
554 | int fix) | |
555 | { | |
556 | int ret; | |
557 | BdrvCheckResult result; | |
558 | ||
559 | ret = bdrv_check(bs, &result, fix); | |
560 | if (ret < 0) { | |
561 | return ret; | |
562 | } | |
563 | ||
564 | check->filename = g_strdup(filename); | |
565 | check->format = g_strdup(bdrv_get_format_name(bs)); | |
566 | check->check_errors = result.check_errors; | |
567 | check->corruptions = result.corruptions; | |
568 | check->has_corruptions = result.corruptions != 0; | |
569 | check->leaks = result.leaks; | |
570 | check->has_leaks = result.leaks != 0; | |
571 | check->corruptions_fixed = result.corruptions_fixed; | |
572 | check->has_corruptions_fixed = result.corruptions != 0; | |
573 | check->leaks_fixed = result.leaks_fixed; | |
574 | check->has_leaks_fixed = result.leaks != 0; | |
575 | check->image_end_offset = result.image_end_offset; | |
576 | check->has_image_end_offset = result.image_end_offset != 0; | |
577 | check->total_clusters = result.bfi.total_clusters; | |
578 | check->has_total_clusters = result.bfi.total_clusters != 0; | |
579 | check->allocated_clusters = result.bfi.allocated_clusters; | |
580 | check->has_allocated_clusters = result.bfi.allocated_clusters != 0; | |
581 | check->fragmented_clusters = result.bfi.fragmented_clusters; | |
582 | check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0; | |
583 | check->compressed_clusters = result.bfi.compressed_clusters; | |
584 | check->has_compressed_clusters = result.bfi.compressed_clusters != 0; | |
585 | ||
586 | return 0; | |
587 | } | |
588 | ||
589 | /* | |
590 | * Checks an image for consistency. Exit codes: | |
591 | * | |
592 | * 0 - Check completed, image is good | |
593 | * 1 - Check not completed because of internal errors | |
594 | * 2 - Check completed, image is corrupted | |
595 | * 3 - Check completed, image has leaked clusters, but is good otherwise | |
596 | * 63 - Checks are not supported by the image format | |
597 | */ | |
598 | static int img_check(int argc, char **argv) | |
599 | { | |
600 | int c, ret; | |
601 | OutputFormat output_format = OFORMAT_HUMAN; | |
602 | const char *filename, *fmt, *output, *cache; | |
603 | BlockBackend *blk; | |
604 | BlockDriverState *bs; | |
605 | int fix = 0; | |
606 | int flags = BDRV_O_CHECK; | |
607 | bool writethrough; | |
608 | ImageCheck *check; | |
609 | bool quiet = false; | |
610 | bool image_opts = false; | |
611 | ||
612 | fmt = NULL; | |
613 | output = NULL; | |
614 | cache = BDRV_DEFAULT_CACHE; | |
615 | ||
616 | for(;;) { | |
617 | int option_index = 0; | |
618 | static const struct option long_options[] = { | |
619 | {"help", no_argument, 0, 'h'}, | |
620 | {"format", required_argument, 0, 'f'}, | |
621 | {"repair", required_argument, 0, 'r'}, | |
622 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
623 | {"object", required_argument, 0, OPTION_OBJECT}, | |
624 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
625 | {0, 0, 0, 0} | |
626 | }; | |
627 | c = getopt_long(argc, argv, "hf:r:T:q", | |
628 | long_options, &option_index); | |
629 | if (c == -1) { | |
630 | break; | |
631 | } | |
632 | switch(c) { | |
633 | case '?': | |
634 | case 'h': | |
635 | help(); | |
636 | break; | |
637 | case 'f': | |
638 | fmt = optarg; | |
639 | break; | |
640 | case 'r': | |
641 | flags |= BDRV_O_RDWR; | |
642 | ||
643 | if (!strcmp(optarg, "leaks")) { | |
644 | fix = BDRV_FIX_LEAKS; | |
645 | } else if (!strcmp(optarg, "all")) { | |
646 | fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; | |
647 | } else { | |
648 | error_exit("Unknown option value for -r " | |
649 | "(expecting 'leaks' or 'all'): %s", optarg); | |
650 | } | |
651 | break; | |
652 | case OPTION_OUTPUT: | |
653 | output = optarg; | |
654 | break; | |
655 | case 'T': | |
656 | cache = optarg; | |
657 | break; | |
658 | case 'q': | |
659 | quiet = true; | |
660 | break; | |
661 | case OPTION_OBJECT: { | |
662 | QemuOpts *opts; | |
663 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
664 | optarg, true); | |
665 | if (!opts) { | |
666 | return 1; | |
667 | } | |
668 | } break; | |
669 | case OPTION_IMAGE_OPTS: | |
670 | image_opts = true; | |
671 | break; | |
672 | } | |
673 | } | |
674 | if (optind != argc - 1) { | |
675 | error_exit("Expecting one image file name"); | |
676 | } | |
677 | filename = argv[optind++]; | |
678 | ||
679 | if (output && !strcmp(output, "json")) { | |
680 | output_format = OFORMAT_JSON; | |
681 | } else if (output && !strcmp(output, "human")) { | |
682 | output_format = OFORMAT_HUMAN; | |
683 | } else if (output) { | |
684 | error_report("--output must be used with human or json as argument."); | |
685 | return 1; | |
686 | } | |
687 | ||
688 | if (qemu_opts_foreach(&qemu_object_opts, | |
689 | user_creatable_add_opts_foreach, | |
690 | NULL, NULL)) { | |
691 | return 1; | |
692 | } | |
693 | ||
694 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
695 | if (ret < 0) { | |
696 | error_report("Invalid source cache option: %s", cache); | |
697 | return 1; | |
698 | } | |
699 | ||
700 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); | |
701 | if (!blk) { | |
702 | return 1; | |
703 | } | |
704 | bs = blk_bs(blk); | |
705 | ||
706 | check = g_new0(ImageCheck, 1); | |
707 | ret = collect_image_check(bs, check, filename, fmt, fix); | |
708 | ||
709 | if (ret == -ENOTSUP) { | |
710 | error_report("This image format does not support checks"); | |
711 | ret = 63; | |
712 | goto fail; | |
713 | } | |
714 | ||
715 | if (check->corruptions_fixed || check->leaks_fixed) { | |
716 | int corruptions_fixed, leaks_fixed; | |
717 | ||
718 | leaks_fixed = check->leaks_fixed; | |
719 | corruptions_fixed = check->corruptions_fixed; | |
720 | ||
721 | if (output_format == OFORMAT_HUMAN) { | |
722 | qprintf(quiet, | |
723 | "The following inconsistencies were found and repaired:\n\n" | |
724 | " %" PRId64 " leaked clusters\n" | |
725 | " %" PRId64 " corruptions\n\n" | |
726 | "Double checking the fixed image now...\n", | |
727 | check->leaks_fixed, | |
728 | check->corruptions_fixed); | |
729 | } | |
730 | ||
731 | ret = collect_image_check(bs, check, filename, fmt, 0); | |
732 | ||
733 | check->leaks_fixed = leaks_fixed; | |
734 | check->corruptions_fixed = corruptions_fixed; | |
735 | } | |
736 | ||
737 | if (!ret) { | |
738 | switch (output_format) { | |
739 | case OFORMAT_HUMAN: | |
740 | dump_human_image_check(check, quiet); | |
741 | break; | |
742 | case OFORMAT_JSON: | |
743 | dump_json_image_check(check, quiet); | |
744 | break; | |
745 | } | |
746 | } | |
747 | ||
748 | if (ret || check->check_errors) { | |
749 | if (ret) { | |
750 | error_report("Check failed: %s", strerror(-ret)); | |
751 | } else { | |
752 | error_report("Check failed"); | |
753 | } | |
754 | ret = 1; | |
755 | goto fail; | |
756 | } | |
757 | ||
758 | if (check->corruptions) { | |
759 | ret = 2; | |
760 | } else if (check->leaks) { | |
761 | ret = 3; | |
762 | } else { | |
763 | ret = 0; | |
764 | } | |
765 | ||
766 | fail: | |
767 | qapi_free_ImageCheck(check); | |
768 | blk_unref(blk); | |
769 | return ret; | |
770 | } | |
771 | ||
772 | typedef struct CommonBlockJobCBInfo { | |
773 | BlockDriverState *bs; | |
774 | Error **errp; | |
775 | } CommonBlockJobCBInfo; | |
776 | ||
777 | static void common_block_job_cb(void *opaque, int ret) | |
778 | { | |
779 | CommonBlockJobCBInfo *cbi = opaque; | |
780 | ||
781 | if (ret < 0) { | |
782 | error_setg_errno(cbi->errp, -ret, "Block job failed"); | |
783 | } | |
784 | } | |
785 | ||
786 | static void run_block_job(BlockJob *job, Error **errp) | |
787 | { | |
788 | AioContext *aio_context = blk_get_aio_context(job->blk); | |
789 | ||
790 | do { | |
791 | aio_poll(aio_context, true); | |
792 | qemu_progress_print(job->len ? | |
793 | ((float)job->offset / job->len * 100.f) : 0.0f, 0); | |
794 | } while (!job->ready); | |
795 | ||
796 | block_job_complete_sync(job, errp); | |
797 | ||
798 | /* A block job may finish instantaneously without publishing any progress, | |
799 | * so just signal completion here */ | |
800 | qemu_progress_print(100.f, 0); | |
801 | } | |
802 | ||
803 | static int img_commit(int argc, char **argv) | |
804 | { | |
805 | int c, ret, flags; | |
806 | const char *filename, *fmt, *cache, *base; | |
807 | BlockBackend *blk; | |
808 | BlockDriverState *bs, *base_bs; | |
809 | bool progress = false, quiet = false, drop = false; | |
810 | bool writethrough; | |
811 | Error *local_err = NULL; | |
812 | CommonBlockJobCBInfo cbi; | |
813 | bool image_opts = false; | |
814 | ||
815 | fmt = NULL; | |
816 | cache = BDRV_DEFAULT_CACHE; | |
817 | base = NULL; | |
818 | for(;;) { | |
819 | static const struct option long_options[] = { | |
820 | {"help", no_argument, 0, 'h'}, | |
821 | {"object", required_argument, 0, OPTION_OBJECT}, | |
822 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
823 | {0, 0, 0, 0} | |
824 | }; | |
825 | c = getopt_long(argc, argv, "f:ht:b:dpq", | |
826 | long_options, NULL); | |
827 | if (c == -1) { | |
828 | break; | |
829 | } | |
830 | switch(c) { | |
831 | case '?': | |
832 | case 'h': | |
833 | help(); | |
834 | break; | |
835 | case 'f': | |
836 | fmt = optarg; | |
837 | break; | |
838 | case 't': | |
839 | cache = optarg; | |
840 | break; | |
841 | case 'b': | |
842 | base = optarg; | |
843 | /* -b implies -d */ | |
844 | drop = true; | |
845 | break; | |
846 | case 'd': | |
847 | drop = true; | |
848 | break; | |
849 | case 'p': | |
850 | progress = true; | |
851 | break; | |
852 | case 'q': | |
853 | quiet = true; | |
854 | break; | |
855 | case OPTION_OBJECT: { | |
856 | QemuOpts *opts; | |
857 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
858 | optarg, true); | |
859 | if (!opts) { | |
860 | return 1; | |
861 | } | |
862 | } break; | |
863 | case OPTION_IMAGE_OPTS: | |
864 | image_opts = true; | |
865 | break; | |
866 | } | |
867 | } | |
868 | ||
869 | /* Progress is not shown in Quiet mode */ | |
870 | if (quiet) { | |
871 | progress = false; | |
872 | } | |
873 | ||
874 | if (optind != argc - 1) { | |
875 | error_exit("Expecting one image file name"); | |
876 | } | |
877 | filename = argv[optind++]; | |
878 | ||
879 | if (qemu_opts_foreach(&qemu_object_opts, | |
880 | user_creatable_add_opts_foreach, | |
881 | NULL, NULL)) { | |
882 | return 1; | |
883 | } | |
884 | ||
885 | flags = BDRV_O_RDWR | BDRV_O_UNMAP; | |
886 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
887 | if (ret < 0) { | |
888 | error_report("Invalid cache option: %s", cache); | |
889 | return 1; | |
890 | } | |
891 | ||
892 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); | |
893 | if (!blk) { | |
894 | return 1; | |
895 | } | |
896 | bs = blk_bs(blk); | |
897 | ||
898 | qemu_progress_init(progress, 1.f); | |
899 | qemu_progress_print(0.f, 100); | |
900 | ||
901 | if (base) { | |
902 | base_bs = bdrv_find_backing_image(bs, base); | |
903 | if (!base_bs) { | |
904 | error_setg(&local_err, QERR_BASE_NOT_FOUND, base); | |
905 | goto done; | |
906 | } | |
907 | } else { | |
908 | /* This is different from QMP, which by default uses the deepest file in | |
909 | * the backing chain (i.e., the very base); however, the traditional | |
910 | * behavior of qemu-img commit is using the immediate backing file. */ | |
911 | base_bs = backing_bs(bs); | |
912 | if (!base_bs) { | |
913 | error_setg(&local_err, "Image does not have a backing file"); | |
914 | goto done; | |
915 | } | |
916 | } | |
917 | ||
918 | cbi = (CommonBlockJobCBInfo){ | |
919 | .errp = &local_err, | |
920 | .bs = bs, | |
921 | }; | |
922 | ||
923 | commit_active_start("commit", bs, base_bs, 0, BLOCKDEV_ON_ERROR_REPORT, | |
924 | common_block_job_cb, &cbi, &local_err); | |
925 | if (local_err) { | |
926 | goto done; | |
927 | } | |
928 | ||
929 | /* When the block job completes, the BlockBackend reference will point to | |
930 | * the old backing file. In order to avoid that the top image is already | |
931 | * deleted, so we can still empty it afterwards, increment the reference | |
932 | * counter here preemptively. */ | |
933 | if (!drop) { | |
934 | bdrv_ref(bs); | |
935 | } | |
936 | ||
937 | run_block_job(bs->job, &local_err); | |
938 | if (local_err) { | |
939 | goto unref_backing; | |
940 | } | |
941 | ||
942 | if (!drop && bs->drv->bdrv_make_empty) { | |
943 | ret = bs->drv->bdrv_make_empty(bs); | |
944 | if (ret) { | |
945 | error_setg_errno(&local_err, -ret, "Could not empty %s", | |
946 | filename); | |
947 | goto unref_backing; | |
948 | } | |
949 | } | |
950 | ||
951 | unref_backing: | |
952 | if (!drop) { | |
953 | bdrv_unref(bs); | |
954 | } | |
955 | ||
956 | done: | |
957 | qemu_progress_end(); | |
958 | ||
959 | blk_unref(blk); | |
960 | ||
961 | if (local_err) { | |
962 | error_report_err(local_err); | |
963 | return 1; | |
964 | } | |
965 | ||
966 | qprintf(quiet, "Image committed.\n"); | |
967 | return 0; | |
968 | } | |
969 | ||
970 | /* | |
971 | * Returns true iff the first sector pointed to by 'buf' contains at least | |
972 | * a non-NUL byte. | |
973 | * | |
974 | * 'pnum' is set to the number of sectors (including and immediately following | |
975 | * the first one) that are known to be in the same allocated/unallocated state. | |
976 | */ | |
977 | static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) | |
978 | { | |
979 | bool is_zero; | |
980 | int i; | |
981 | ||
982 | if (n <= 0) { | |
983 | *pnum = 0; | |
984 | return 0; | |
985 | } | |
986 | is_zero = buffer_is_zero(buf, 512); | |
987 | for(i = 1; i < n; i++) { | |
988 | buf += 512; | |
989 | if (is_zero != buffer_is_zero(buf, 512)) { | |
990 | break; | |
991 | } | |
992 | } | |
993 | *pnum = i; | |
994 | return !is_zero; | |
995 | } | |
996 | ||
997 | /* | |
998 | * Like is_allocated_sectors, but if the buffer starts with a used sector, | |
999 | * up to 'min' consecutive sectors containing zeros are ignored. This avoids | |
1000 | * breaking up write requests for only small sparse areas. | |
1001 | */ | |
1002 | static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, | |
1003 | int min) | |
1004 | { | |
1005 | int ret; | |
1006 | int num_checked, num_used; | |
1007 | ||
1008 | if (n < min) { | |
1009 | min = n; | |
1010 | } | |
1011 | ||
1012 | ret = is_allocated_sectors(buf, n, pnum); | |
1013 | if (!ret) { | |
1014 | return ret; | |
1015 | } | |
1016 | ||
1017 | num_used = *pnum; | |
1018 | buf += BDRV_SECTOR_SIZE * *pnum; | |
1019 | n -= *pnum; | |
1020 | num_checked = num_used; | |
1021 | ||
1022 | while (n > 0) { | |
1023 | ret = is_allocated_sectors(buf, n, pnum); | |
1024 | ||
1025 | buf += BDRV_SECTOR_SIZE * *pnum; | |
1026 | n -= *pnum; | |
1027 | num_checked += *pnum; | |
1028 | if (ret) { | |
1029 | num_used = num_checked; | |
1030 | } else if (*pnum >= min) { | |
1031 | break; | |
1032 | } | |
1033 | } | |
1034 | ||
1035 | *pnum = num_used; | |
1036 | return 1; | |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * Compares two buffers sector by sector. Returns 0 if the first sector of both | |
1041 | * buffers matches, non-zero otherwise. | |
1042 | * | |
1043 | * pnum is set to the number of sectors (including and immediately following | |
1044 | * the first one) that are known to have the same comparison result | |
1045 | */ | |
1046 | static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, | |
1047 | int *pnum) | |
1048 | { | |
1049 | bool res; | |
1050 | int i; | |
1051 | ||
1052 | if (n <= 0) { | |
1053 | *pnum = 0; | |
1054 | return 0; | |
1055 | } | |
1056 | ||
1057 | res = !!memcmp(buf1, buf2, 512); | |
1058 | for(i = 1; i < n; i++) { | |
1059 | buf1 += 512; | |
1060 | buf2 += 512; | |
1061 | ||
1062 | if (!!memcmp(buf1, buf2, 512) != res) { | |
1063 | break; | |
1064 | } | |
1065 | } | |
1066 | ||
1067 | *pnum = i; | |
1068 | return res; | |
1069 | } | |
1070 | ||
1071 | #define IO_BUF_SIZE (2 * 1024 * 1024) | |
1072 | ||
1073 | static int64_t sectors_to_bytes(int64_t sectors) | |
1074 | { | |
1075 | return sectors << BDRV_SECTOR_BITS; | |
1076 | } | |
1077 | ||
1078 | static int64_t sectors_to_process(int64_t total, int64_t from) | |
1079 | { | |
1080 | return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS); | |
1081 | } | |
1082 | ||
1083 | /* | |
1084 | * Check if passed sectors are empty (not allocated or contain only 0 bytes) | |
1085 | * | |
1086 | * Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero | |
1087 | * data and negative value on error. | |
1088 | * | |
1089 | * @param blk: BlockBackend for the image | |
1090 | * @param sect_num: Number of first sector to check | |
1091 | * @param sect_count: Number of sectors to check | |
1092 | * @param filename: Name of disk file we are checking (logging purpose) | |
1093 | * @param buffer: Allocated buffer for storing read data | |
1094 | * @param quiet: Flag for quiet mode | |
1095 | */ | |
1096 | static int check_empty_sectors(BlockBackend *blk, int64_t sect_num, | |
1097 | int sect_count, const char *filename, | |
1098 | uint8_t *buffer, bool quiet) | |
1099 | { | |
1100 | int pnum, ret = 0; | |
1101 | ret = blk_pread(blk, sect_num << BDRV_SECTOR_BITS, buffer, | |
1102 | sect_count << BDRV_SECTOR_BITS); | |
1103 | if (ret < 0) { | |
1104 | error_report("Error while reading offset %" PRId64 " of %s: %s", | |
1105 | sectors_to_bytes(sect_num), filename, strerror(-ret)); | |
1106 | return ret; | |
1107 | } | |
1108 | ret = is_allocated_sectors(buffer, sect_count, &pnum); | |
1109 | if (ret || pnum != sect_count) { | |
1110 | qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", | |
1111 | sectors_to_bytes(ret ? sect_num : sect_num + pnum)); | |
1112 | return 1; | |
1113 | } | |
1114 | ||
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | /* | |
1119 | * Compares two images. Exit codes: | |
1120 | * | |
1121 | * 0 - Images are identical | |
1122 | * 1 - Images differ | |
1123 | * >1 - Error occurred | |
1124 | */ | |
1125 | static int img_compare(int argc, char **argv) | |
1126 | { | |
1127 | const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2; | |
1128 | BlockBackend *blk1, *blk2; | |
1129 | BlockDriverState *bs1, *bs2; | |
1130 | int64_t total_sectors1, total_sectors2; | |
1131 | uint8_t *buf1 = NULL, *buf2 = NULL; | |
1132 | int pnum1, pnum2; | |
1133 | int allocated1, allocated2; | |
1134 | int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */ | |
1135 | bool progress = false, quiet = false, strict = false; | |
1136 | int flags; | |
1137 | bool writethrough; | |
1138 | int64_t total_sectors; | |
1139 | int64_t sector_num = 0; | |
1140 | int64_t nb_sectors; | |
1141 | int c, pnum; | |
1142 | uint64_t progress_base; | |
1143 | bool image_opts = false; | |
1144 | ||
1145 | cache = BDRV_DEFAULT_CACHE; | |
1146 | for (;;) { | |
1147 | static const struct option long_options[] = { | |
1148 | {"help", no_argument, 0, 'h'}, | |
1149 | {"object", required_argument, 0, OPTION_OBJECT}, | |
1150 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
1151 | {0, 0, 0, 0} | |
1152 | }; | |
1153 | c = getopt_long(argc, argv, "hf:F:T:pqs", | |
1154 | long_options, NULL); | |
1155 | if (c == -1) { | |
1156 | break; | |
1157 | } | |
1158 | switch (c) { | |
1159 | case '?': | |
1160 | case 'h': | |
1161 | help(); | |
1162 | break; | |
1163 | case 'f': | |
1164 | fmt1 = optarg; | |
1165 | break; | |
1166 | case 'F': | |
1167 | fmt2 = optarg; | |
1168 | break; | |
1169 | case 'T': | |
1170 | cache = optarg; | |
1171 | break; | |
1172 | case 'p': | |
1173 | progress = true; | |
1174 | break; | |
1175 | case 'q': | |
1176 | quiet = true; | |
1177 | break; | |
1178 | case 's': | |
1179 | strict = true; | |
1180 | break; | |
1181 | case OPTION_OBJECT: { | |
1182 | QemuOpts *opts; | |
1183 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
1184 | optarg, true); | |
1185 | if (!opts) { | |
1186 | ret = 2; | |
1187 | goto out4; | |
1188 | } | |
1189 | } break; | |
1190 | case OPTION_IMAGE_OPTS: | |
1191 | image_opts = true; | |
1192 | break; | |
1193 | } | |
1194 | } | |
1195 | ||
1196 | /* Progress is not shown in Quiet mode */ | |
1197 | if (quiet) { | |
1198 | progress = false; | |
1199 | } | |
1200 | ||
1201 | ||
1202 | if (optind != argc - 2) { | |
1203 | error_exit("Expecting two image file names"); | |
1204 | } | |
1205 | filename1 = argv[optind++]; | |
1206 | filename2 = argv[optind++]; | |
1207 | ||
1208 | if (qemu_opts_foreach(&qemu_object_opts, | |
1209 | user_creatable_add_opts_foreach, | |
1210 | NULL, NULL)) { | |
1211 | ret = 2; | |
1212 | goto out4; | |
1213 | } | |
1214 | ||
1215 | /* Initialize before goto out */ | |
1216 | qemu_progress_init(progress, 2.0); | |
1217 | ||
1218 | flags = 0; | |
1219 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
1220 | if (ret < 0) { | |
1221 | error_report("Invalid source cache option: %s", cache); | |
1222 | ret = 2; | |
1223 | goto out3; | |
1224 | } | |
1225 | ||
1226 | blk1 = img_open(image_opts, filename1, fmt1, flags, writethrough, quiet); | |
1227 | if (!blk1) { | |
1228 | ret = 2; | |
1229 | goto out3; | |
1230 | } | |
1231 | ||
1232 | blk2 = img_open(image_opts, filename2, fmt2, flags, writethrough, quiet); | |
1233 | if (!blk2) { | |
1234 | ret = 2; | |
1235 | goto out2; | |
1236 | } | |
1237 | bs1 = blk_bs(blk1); | |
1238 | bs2 = blk_bs(blk2); | |
1239 | ||
1240 | buf1 = blk_blockalign(blk1, IO_BUF_SIZE); | |
1241 | buf2 = blk_blockalign(blk2, IO_BUF_SIZE); | |
1242 | total_sectors1 = blk_nb_sectors(blk1); | |
1243 | if (total_sectors1 < 0) { | |
1244 | error_report("Can't get size of %s: %s", | |
1245 | filename1, strerror(-total_sectors1)); | |
1246 | ret = 4; | |
1247 | goto out; | |
1248 | } | |
1249 | total_sectors2 = blk_nb_sectors(blk2); | |
1250 | if (total_sectors2 < 0) { | |
1251 | error_report("Can't get size of %s: %s", | |
1252 | filename2, strerror(-total_sectors2)); | |
1253 | ret = 4; | |
1254 | goto out; | |
1255 | } | |
1256 | total_sectors = MIN(total_sectors1, total_sectors2); | |
1257 | progress_base = MAX(total_sectors1, total_sectors2); | |
1258 | ||
1259 | qemu_progress_print(0, 100); | |
1260 | ||
1261 | if (strict && total_sectors1 != total_sectors2) { | |
1262 | ret = 1; | |
1263 | qprintf(quiet, "Strict mode: Image size mismatch!\n"); | |
1264 | goto out; | |
1265 | } | |
1266 | ||
1267 | for (;;) { | |
1268 | int64_t status1, status2; | |
1269 | BlockDriverState *file; | |
1270 | ||
1271 | nb_sectors = sectors_to_process(total_sectors, sector_num); | |
1272 | if (nb_sectors <= 0) { | |
1273 | break; | |
1274 | } | |
1275 | status1 = bdrv_get_block_status_above(bs1, NULL, sector_num, | |
1276 | total_sectors1 - sector_num, | |
1277 | &pnum1, &file); | |
1278 | if (status1 < 0) { | |
1279 | ret = 3; | |
1280 | error_report("Sector allocation test failed for %s", filename1); | |
1281 | goto out; | |
1282 | } | |
1283 | allocated1 = status1 & BDRV_BLOCK_ALLOCATED; | |
1284 | ||
1285 | status2 = bdrv_get_block_status_above(bs2, NULL, sector_num, | |
1286 | total_sectors2 - sector_num, | |
1287 | &pnum2, &file); | |
1288 | if (status2 < 0) { | |
1289 | ret = 3; | |
1290 | error_report("Sector allocation test failed for %s", filename2); | |
1291 | goto out; | |
1292 | } | |
1293 | allocated2 = status2 & BDRV_BLOCK_ALLOCATED; | |
1294 | if (pnum1) { | |
1295 | nb_sectors = MIN(nb_sectors, pnum1); | |
1296 | } | |
1297 | if (pnum2) { | |
1298 | nb_sectors = MIN(nb_sectors, pnum2); | |
1299 | } | |
1300 | ||
1301 | if (strict) { | |
1302 | if ((status1 & ~BDRV_BLOCK_OFFSET_MASK) != | |
1303 | (status2 & ~BDRV_BLOCK_OFFSET_MASK)) { | |
1304 | ret = 1; | |
1305 | qprintf(quiet, "Strict mode: Offset %" PRId64 | |
1306 | " block status mismatch!\n", | |
1307 | sectors_to_bytes(sector_num)); | |
1308 | goto out; | |
1309 | } | |
1310 | } | |
1311 | if ((status1 & BDRV_BLOCK_ZERO) && (status2 & BDRV_BLOCK_ZERO)) { | |
1312 | nb_sectors = MIN(pnum1, pnum2); | |
1313 | } else if (allocated1 == allocated2) { | |
1314 | if (allocated1) { | |
1315 | ret = blk_pread(blk1, sector_num << BDRV_SECTOR_BITS, buf1, | |
1316 | nb_sectors << BDRV_SECTOR_BITS); | |
1317 | if (ret < 0) { | |
1318 | error_report("Error while reading offset %" PRId64 " of %s:" | |
1319 | " %s", sectors_to_bytes(sector_num), filename1, | |
1320 | strerror(-ret)); | |
1321 | ret = 4; | |
1322 | goto out; | |
1323 | } | |
1324 | ret = blk_pread(blk2, sector_num << BDRV_SECTOR_BITS, buf2, | |
1325 | nb_sectors << BDRV_SECTOR_BITS); | |
1326 | if (ret < 0) { | |
1327 | error_report("Error while reading offset %" PRId64 | |
1328 | " of %s: %s", sectors_to_bytes(sector_num), | |
1329 | filename2, strerror(-ret)); | |
1330 | ret = 4; | |
1331 | goto out; | |
1332 | } | |
1333 | ret = compare_sectors(buf1, buf2, nb_sectors, &pnum); | |
1334 | if (ret || pnum != nb_sectors) { | |
1335 | qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", | |
1336 | sectors_to_bytes( | |
1337 | ret ? sector_num : sector_num + pnum)); | |
1338 | ret = 1; | |
1339 | goto out; | |
1340 | } | |
1341 | } | |
1342 | } else { | |
1343 | ||
1344 | if (allocated1) { | |
1345 | ret = check_empty_sectors(blk1, sector_num, nb_sectors, | |
1346 | filename1, buf1, quiet); | |
1347 | } else { | |
1348 | ret = check_empty_sectors(blk2, sector_num, nb_sectors, | |
1349 | filename2, buf1, quiet); | |
1350 | } | |
1351 | if (ret) { | |
1352 | if (ret < 0) { | |
1353 | error_report("Error while reading offset %" PRId64 ": %s", | |
1354 | sectors_to_bytes(sector_num), strerror(-ret)); | |
1355 | ret = 4; | |
1356 | } | |
1357 | goto out; | |
1358 | } | |
1359 | } | |
1360 | sector_num += nb_sectors; | |
1361 | qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); | |
1362 | } | |
1363 | ||
1364 | if (total_sectors1 != total_sectors2) { | |
1365 | BlockBackend *blk_over; | |
1366 | int64_t total_sectors_over; | |
1367 | const char *filename_over; | |
1368 | ||
1369 | qprintf(quiet, "Warning: Image size mismatch!\n"); | |
1370 | if (total_sectors1 > total_sectors2) { | |
1371 | total_sectors_over = total_sectors1; | |
1372 | blk_over = blk1; | |
1373 | filename_over = filename1; | |
1374 | } else { | |
1375 | total_sectors_over = total_sectors2; | |
1376 | blk_over = blk2; | |
1377 | filename_over = filename2; | |
1378 | } | |
1379 | ||
1380 | for (;;) { | |
1381 | nb_sectors = sectors_to_process(total_sectors_over, sector_num); | |
1382 | if (nb_sectors <= 0) { | |
1383 | break; | |
1384 | } | |
1385 | ret = bdrv_is_allocated_above(blk_bs(blk_over), NULL, sector_num, | |
1386 | nb_sectors, &pnum); | |
1387 | if (ret < 0) { | |
1388 | ret = 3; | |
1389 | error_report("Sector allocation test failed for %s", | |
1390 | filename_over); | |
1391 | goto out; | |
1392 | ||
1393 | } | |
1394 | nb_sectors = pnum; | |
1395 | if (ret) { | |
1396 | ret = check_empty_sectors(blk_over, sector_num, nb_sectors, | |
1397 | filename_over, buf1, quiet); | |
1398 | if (ret) { | |
1399 | if (ret < 0) { | |
1400 | error_report("Error while reading offset %" PRId64 | |
1401 | " of %s: %s", sectors_to_bytes(sector_num), | |
1402 | filename_over, strerror(-ret)); | |
1403 | ret = 4; | |
1404 | } | |
1405 | goto out; | |
1406 | } | |
1407 | } | |
1408 | sector_num += nb_sectors; | |
1409 | qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); | |
1410 | } | |
1411 | } | |
1412 | ||
1413 | qprintf(quiet, "Images are identical.\n"); | |
1414 | ret = 0; | |
1415 | ||
1416 | out: | |
1417 | qemu_vfree(buf1); | |
1418 | qemu_vfree(buf2); | |
1419 | blk_unref(blk2); | |
1420 | out2: | |
1421 | blk_unref(blk1); | |
1422 | out3: | |
1423 | qemu_progress_end(); | |
1424 | out4: | |
1425 | return ret; | |
1426 | } | |
1427 | ||
1428 | enum ImgConvertBlockStatus { | |
1429 | BLK_DATA, | |
1430 | BLK_ZERO, | |
1431 | BLK_BACKING_FILE, | |
1432 | }; | |
1433 | ||
1434 | typedef struct ImgConvertState { | |
1435 | BlockBackend **src; | |
1436 | int64_t *src_sectors; | |
1437 | int src_cur, src_num; | |
1438 | int64_t src_cur_offset; | |
1439 | int64_t total_sectors; | |
1440 | int64_t allocated_sectors; | |
1441 | enum ImgConvertBlockStatus status; | |
1442 | int64_t sector_next_status; | |
1443 | BlockBackend *target; | |
1444 | bool has_zero_init; | |
1445 | bool compressed; | |
1446 | bool target_has_backing; | |
1447 | int min_sparse; | |
1448 | size_t cluster_sectors; | |
1449 | size_t buf_sectors; | |
1450 | } ImgConvertState; | |
1451 | ||
1452 | static void convert_select_part(ImgConvertState *s, int64_t sector_num) | |
1453 | { | |
1454 | assert(sector_num >= s->src_cur_offset); | |
1455 | while (sector_num - s->src_cur_offset >= s->src_sectors[s->src_cur]) { | |
1456 | s->src_cur_offset += s->src_sectors[s->src_cur]; | |
1457 | s->src_cur++; | |
1458 | assert(s->src_cur < s->src_num); | |
1459 | } | |
1460 | } | |
1461 | ||
1462 | static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num) | |
1463 | { | |
1464 | int64_t ret; | |
1465 | int n; | |
1466 | ||
1467 | convert_select_part(s, sector_num); | |
1468 | ||
1469 | assert(s->total_sectors > sector_num); | |
1470 | n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS); | |
1471 | ||
1472 | if (s->sector_next_status <= sector_num) { | |
1473 | BlockDriverState *file; | |
1474 | ret = bdrv_get_block_status(blk_bs(s->src[s->src_cur]), | |
1475 | sector_num - s->src_cur_offset, | |
1476 | n, &n, &file); | |
1477 | if (ret < 0) { | |
1478 | return ret; | |
1479 | } | |
1480 | ||
1481 | if (ret & BDRV_BLOCK_ZERO) { | |
1482 | s->status = BLK_ZERO; | |
1483 | } else if (ret & BDRV_BLOCK_DATA) { | |
1484 | s->status = BLK_DATA; | |
1485 | } else if (!s->target_has_backing) { | |
1486 | /* Without a target backing file we must copy over the contents of | |
1487 | * the backing file as well. */ | |
1488 | /* Check block status of the backing file chain to avoid | |
1489 | * needlessly reading zeroes and limiting the iteration to the | |
1490 | * buffer size */ | |
1491 | ret = bdrv_get_block_status_above(blk_bs(s->src[s->src_cur]), NULL, | |
1492 | sector_num - s->src_cur_offset, | |
1493 | n, &n, &file); | |
1494 | if (ret < 0) { | |
1495 | return ret; | |
1496 | } | |
1497 | ||
1498 | if (ret & BDRV_BLOCK_ZERO) { | |
1499 | s->status = BLK_ZERO; | |
1500 | } else { | |
1501 | s->status = BLK_DATA; | |
1502 | } | |
1503 | } else { | |
1504 | s->status = BLK_BACKING_FILE; | |
1505 | } | |
1506 | ||
1507 | s->sector_next_status = sector_num + n; | |
1508 | } | |
1509 | ||
1510 | n = MIN(n, s->sector_next_status - sector_num); | |
1511 | if (s->status == BLK_DATA) { | |
1512 | n = MIN(n, s->buf_sectors); | |
1513 | } | |
1514 | ||
1515 | /* We need to write complete clusters for compressed images, so if an | |
1516 | * unallocated area is shorter than that, we must consider the whole | |
1517 | * cluster allocated. */ | |
1518 | if (s->compressed) { | |
1519 | if (n < s->cluster_sectors) { | |
1520 | n = MIN(s->cluster_sectors, s->total_sectors - sector_num); | |
1521 | s->status = BLK_DATA; | |
1522 | } else { | |
1523 | n = QEMU_ALIGN_DOWN(n, s->cluster_sectors); | |
1524 | } | |
1525 | } | |
1526 | ||
1527 | return n; | |
1528 | } | |
1529 | ||
1530 | static int convert_read(ImgConvertState *s, int64_t sector_num, int nb_sectors, | |
1531 | uint8_t *buf) | |
1532 | { | |
1533 | int n; | |
1534 | int ret; | |
1535 | ||
1536 | assert(nb_sectors <= s->buf_sectors); | |
1537 | while (nb_sectors > 0) { | |
1538 | BlockBackend *blk; | |
1539 | int64_t bs_sectors; | |
1540 | ||
1541 | /* In the case of compression with multiple source files, we can get a | |
1542 | * nb_sectors that spreads into the next part. So we must be able to | |
1543 | * read across multiple BDSes for one convert_read() call. */ | |
1544 | convert_select_part(s, sector_num); | |
1545 | blk = s->src[s->src_cur]; | |
1546 | bs_sectors = s->src_sectors[s->src_cur]; | |
1547 | ||
1548 | n = MIN(nb_sectors, bs_sectors - (sector_num - s->src_cur_offset)); | |
1549 | ret = blk_pread(blk, | |
1550 | (sector_num - s->src_cur_offset) << BDRV_SECTOR_BITS, | |
1551 | buf, n << BDRV_SECTOR_BITS); | |
1552 | if (ret < 0) { | |
1553 | return ret; | |
1554 | } | |
1555 | ||
1556 | sector_num += n; | |
1557 | nb_sectors -= n; | |
1558 | buf += n * BDRV_SECTOR_SIZE; | |
1559 | } | |
1560 | ||
1561 | return 0; | |
1562 | } | |
1563 | ||
1564 | static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors, | |
1565 | const uint8_t *buf) | |
1566 | { | |
1567 | int ret; | |
1568 | ||
1569 | while (nb_sectors > 0) { | |
1570 | int n = nb_sectors; | |
1571 | ||
1572 | switch (s->status) { | |
1573 | case BLK_BACKING_FILE: | |
1574 | /* If we have a backing file, leave clusters unallocated that are | |
1575 | * unallocated in the source image, so that the backing file is | |
1576 | * visible at the respective offset. */ | |
1577 | assert(s->target_has_backing); | |
1578 | break; | |
1579 | ||
1580 | case BLK_DATA: | |
1581 | /* We must always write compressed clusters as a whole, so don't | |
1582 | * try to find zeroed parts in the buffer. We can only save the | |
1583 | * write if the buffer is completely zeroed and we're allowed to | |
1584 | * keep the target sparse. */ | |
1585 | if (s->compressed) { | |
1586 | if (s->has_zero_init && s->min_sparse && | |
1587 | buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) | |
1588 | { | |
1589 | assert(!s->target_has_backing); | |
1590 | break; | |
1591 | } | |
1592 | ||
1593 | ret = blk_pwrite_compressed(s->target, | |
1594 | sector_num << BDRV_SECTOR_BITS, | |
1595 | buf, n << BDRV_SECTOR_BITS); | |
1596 | if (ret < 0) { | |
1597 | return ret; | |
1598 | } | |
1599 | break; | |
1600 | } | |
1601 | ||
1602 | /* If there is real non-zero data or we're told to keep the target | |
1603 | * fully allocated (-S 0), we must write it. Otherwise we can treat | |
1604 | * it as zero sectors. */ | |
1605 | if (!s->min_sparse || | |
1606 | is_allocated_sectors_min(buf, n, &n, s->min_sparse)) | |
1607 | { | |
1608 | ret = blk_pwrite(s->target, sector_num << BDRV_SECTOR_BITS, | |
1609 | buf, n << BDRV_SECTOR_BITS, 0); | |
1610 | if (ret < 0) { | |
1611 | return ret; | |
1612 | } | |
1613 | break; | |
1614 | } | |
1615 | /* fall-through */ | |
1616 | ||
1617 | case BLK_ZERO: | |
1618 | if (s->has_zero_init) { | |
1619 | break; | |
1620 | } | |
1621 | ret = blk_pwrite_zeroes(s->target, sector_num << BDRV_SECTOR_BITS, | |
1622 | n << BDRV_SECTOR_BITS, 0); | |
1623 | if (ret < 0) { | |
1624 | return ret; | |
1625 | } | |
1626 | break; | |
1627 | } | |
1628 | ||
1629 | sector_num += n; | |
1630 | nb_sectors -= n; | |
1631 | buf += n * BDRV_SECTOR_SIZE; | |
1632 | } | |
1633 | ||
1634 | return 0; | |
1635 | } | |
1636 | ||
1637 | static int convert_do_copy(ImgConvertState *s) | |
1638 | { | |
1639 | uint8_t *buf = NULL; | |
1640 | int64_t sector_num, allocated_done; | |
1641 | int ret; | |
1642 | int n; | |
1643 | ||
1644 | /* Check whether we have zero initialisation or can get it efficiently */ | |
1645 | s->has_zero_init = s->min_sparse && !s->target_has_backing | |
1646 | ? bdrv_has_zero_init(blk_bs(s->target)) | |
1647 | : false; | |
1648 | ||
1649 | if (!s->has_zero_init && !s->target_has_backing && | |
1650 | bdrv_can_write_zeroes_with_unmap(blk_bs(s->target))) | |
1651 | { | |
1652 | ret = blk_make_zero(s->target, BDRV_REQ_MAY_UNMAP); | |
1653 | if (ret == 0) { | |
1654 | s->has_zero_init = true; | |
1655 | } | |
1656 | } | |
1657 | ||
1658 | /* Allocate buffer for copied data. For compressed images, only one cluster | |
1659 | * can be copied at a time. */ | |
1660 | if (s->compressed) { | |
1661 | if (s->cluster_sectors <= 0 || s->cluster_sectors > s->buf_sectors) { | |
1662 | error_report("invalid cluster size"); | |
1663 | ret = -EINVAL; | |
1664 | goto fail; | |
1665 | } | |
1666 | s->buf_sectors = s->cluster_sectors; | |
1667 | } | |
1668 | buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE); | |
1669 | ||
1670 | /* Calculate allocated sectors for progress */ | |
1671 | s->allocated_sectors = 0; | |
1672 | sector_num = 0; | |
1673 | while (sector_num < s->total_sectors) { | |
1674 | n = convert_iteration_sectors(s, sector_num); | |
1675 | if (n < 0) { | |
1676 | ret = n; | |
1677 | goto fail; | |
1678 | } | |
1679 | if (s->status == BLK_DATA || (!s->min_sparse && s->status == BLK_ZERO)) | |
1680 | { | |
1681 | s->allocated_sectors += n; | |
1682 | } | |
1683 | sector_num += n; | |
1684 | } | |
1685 | ||
1686 | /* Do the copy */ | |
1687 | s->src_cur = 0; | |
1688 | s->src_cur_offset = 0; | |
1689 | s->sector_next_status = 0; | |
1690 | ||
1691 | sector_num = 0; | |
1692 | allocated_done = 0; | |
1693 | ||
1694 | while (sector_num < s->total_sectors) { | |
1695 | n = convert_iteration_sectors(s, sector_num); | |
1696 | if (n < 0) { | |
1697 | ret = n; | |
1698 | goto fail; | |
1699 | } | |
1700 | if (s->status == BLK_DATA || (!s->min_sparse && s->status == BLK_ZERO)) | |
1701 | { | |
1702 | allocated_done += n; | |
1703 | qemu_progress_print(100.0 * allocated_done / s->allocated_sectors, | |
1704 | 0); | |
1705 | } | |
1706 | ||
1707 | if (s->status == BLK_DATA) { | |
1708 | ret = convert_read(s, sector_num, n, buf); | |
1709 | if (ret < 0) { | |
1710 | error_report("error while reading sector %" PRId64 | |
1711 | ": %s", sector_num, strerror(-ret)); | |
1712 | goto fail; | |
1713 | } | |
1714 | } else if (!s->min_sparse && s->status == BLK_ZERO) { | |
1715 | n = MIN(n, s->buf_sectors); | |
1716 | memset(buf, 0, n * BDRV_SECTOR_SIZE); | |
1717 | s->status = BLK_DATA; | |
1718 | } | |
1719 | ||
1720 | ret = convert_write(s, sector_num, n, buf); | |
1721 | if (ret < 0) { | |
1722 | error_report("error while writing sector %" PRId64 | |
1723 | ": %s", sector_num, strerror(-ret)); | |
1724 | goto fail; | |
1725 | } | |
1726 | ||
1727 | sector_num += n; | |
1728 | } | |
1729 | ||
1730 | if (s->compressed) { | |
1731 | /* signal EOF to align */ | |
1732 | ret = blk_pwrite_compressed(s->target, 0, NULL, 0); | |
1733 | if (ret < 0) { | |
1734 | goto fail; | |
1735 | } | |
1736 | } | |
1737 | ||
1738 | ret = 0; | |
1739 | fail: | |
1740 | qemu_vfree(buf); | |
1741 | return ret; | |
1742 | } | |
1743 | ||
1744 | static int img_convert(int argc, char **argv) | |
1745 | { | |
1746 | int c, bs_n, bs_i, compress, cluster_sectors, skip_create; | |
1747 | int64_t ret = 0; | |
1748 | int progress = 0, flags, src_flags; | |
1749 | bool writethrough, src_writethrough; | |
1750 | const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename; | |
1751 | BlockDriver *drv, *proto_drv; | |
1752 | BlockBackend **blk = NULL, *out_blk = NULL; | |
1753 | BlockDriverState **bs = NULL, *out_bs = NULL; | |
1754 | int64_t total_sectors; | |
1755 | int64_t *bs_sectors = NULL; | |
1756 | size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE; | |
1757 | BlockDriverInfo bdi; | |
1758 | QemuOpts *opts = NULL; | |
1759 | QemuOptsList *create_opts = NULL; | |
1760 | const char *out_baseimg_param; | |
1761 | char *options = NULL; | |
1762 | const char *snapshot_name = NULL; | |
1763 | int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ | |
1764 | bool quiet = false; | |
1765 | Error *local_err = NULL; | |
1766 | QemuOpts *sn_opts = NULL; | |
1767 | ImgConvertState state; | |
1768 | bool image_opts = false; | |
1769 | ||
1770 | fmt = NULL; | |
1771 | out_fmt = "raw"; | |
1772 | cache = "unsafe"; | |
1773 | src_cache = BDRV_DEFAULT_CACHE; | |
1774 | out_baseimg = NULL; | |
1775 | compress = 0; | |
1776 | skip_create = 0; | |
1777 | for(;;) { | |
1778 | static const struct option long_options[] = { | |
1779 | {"help", no_argument, 0, 'h'}, | |
1780 | {"object", required_argument, 0, OPTION_OBJECT}, | |
1781 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
1782 | {0, 0, 0, 0} | |
1783 | }; | |
1784 | c = getopt_long(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn", | |
1785 | long_options, NULL); | |
1786 | if (c == -1) { | |
1787 | break; | |
1788 | } | |
1789 | switch(c) { | |
1790 | case '?': | |
1791 | case 'h': | |
1792 | help(); | |
1793 | break; | |
1794 | case 'f': | |
1795 | fmt = optarg; | |
1796 | break; | |
1797 | case 'O': | |
1798 | out_fmt = optarg; | |
1799 | break; | |
1800 | case 'B': | |
1801 | out_baseimg = optarg; | |
1802 | break; | |
1803 | case 'c': | |
1804 | compress = 1; | |
1805 | break; | |
1806 | case 'e': | |
1807 | error_report("option -e is deprecated, please use \'-o " | |
1808 | "encryption\' instead!"); | |
1809 | ret = -1; | |
1810 | goto fail_getopt; | |
1811 | case '6': | |
1812 | error_report("option -6 is deprecated, please use \'-o " | |
1813 | "compat6\' instead!"); | |
1814 | ret = -1; | |
1815 | goto fail_getopt; | |
1816 | case 'o': | |
1817 | if (!is_valid_option_list(optarg)) { | |
1818 | error_report("Invalid option list: %s", optarg); | |
1819 | ret = -1; | |
1820 | goto fail_getopt; | |
1821 | } | |
1822 | if (!options) { | |
1823 | options = g_strdup(optarg); | |
1824 | } else { | |
1825 | char *old_options = options; | |
1826 | options = g_strdup_printf("%s,%s", options, optarg); | |
1827 | g_free(old_options); | |
1828 | } | |
1829 | break; | |
1830 | case 's': | |
1831 | snapshot_name = optarg; | |
1832 | break; | |
1833 | case 'l': | |
1834 | if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { | |
1835 | sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, | |
1836 | optarg, false); | |
1837 | if (!sn_opts) { | |
1838 | error_report("Failed in parsing snapshot param '%s'", | |
1839 | optarg); | |
1840 | ret = -1; | |
1841 | goto fail_getopt; | |
1842 | } | |
1843 | } else { | |
1844 | snapshot_name = optarg; | |
1845 | } | |
1846 | break; | |
1847 | case 'S': | |
1848 | { | |
1849 | int64_t sval; | |
1850 | char *end; | |
1851 | sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); | |
1852 | if (sval < 0 || *end) { | |
1853 | error_report("Invalid minimum zero buffer size for sparse output specified"); | |
1854 | ret = -1; | |
1855 | goto fail_getopt; | |
1856 | } | |
1857 | ||
1858 | min_sparse = sval / BDRV_SECTOR_SIZE; | |
1859 | break; | |
1860 | } | |
1861 | case 'p': | |
1862 | progress = 1; | |
1863 | break; | |
1864 | case 't': | |
1865 | cache = optarg; | |
1866 | break; | |
1867 | case 'T': | |
1868 | src_cache = optarg; | |
1869 | break; | |
1870 | case 'q': | |
1871 | quiet = true; | |
1872 | break; | |
1873 | case 'n': | |
1874 | skip_create = 1; | |
1875 | break; | |
1876 | case OPTION_OBJECT: | |
1877 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
1878 | optarg, true); | |
1879 | if (!opts) { | |
1880 | goto fail_getopt; | |
1881 | } | |
1882 | break; | |
1883 | case OPTION_IMAGE_OPTS: | |
1884 | image_opts = true; | |
1885 | break; | |
1886 | } | |
1887 | } | |
1888 | ||
1889 | if (qemu_opts_foreach(&qemu_object_opts, | |
1890 | user_creatable_add_opts_foreach, | |
1891 | NULL, NULL)) { | |
1892 | goto fail_getopt; | |
1893 | } | |
1894 | ||
1895 | /* Initialize before goto out */ | |
1896 | if (quiet) { | |
1897 | progress = 0; | |
1898 | } | |
1899 | qemu_progress_init(progress, 1.0); | |
1900 | ||
1901 | bs_n = argc - optind - 1; | |
1902 | out_filename = bs_n >= 1 ? argv[argc - 1] : NULL; | |
1903 | ||
1904 | if (options && has_help_option(options)) { | |
1905 | ret = print_block_option_help(out_filename, out_fmt); | |
1906 | goto out; | |
1907 | } | |
1908 | ||
1909 | if (bs_n < 1) { | |
1910 | error_exit("Must specify image file name"); | |
1911 | } | |
1912 | ||
1913 | ||
1914 | if (bs_n > 1 && out_baseimg) { | |
1915 | error_report("-B makes no sense when concatenating multiple input " | |
1916 | "images"); | |
1917 | ret = -1; | |
1918 | goto out; | |
1919 | } | |
1920 | ||
1921 | src_flags = 0; | |
1922 | ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough); | |
1923 | if (ret < 0) { | |
1924 | error_report("Invalid source cache option: %s", src_cache); | |
1925 | goto out; | |
1926 | } | |
1927 | ||
1928 | qemu_progress_print(0, 100); | |
1929 | ||
1930 | blk = g_new0(BlockBackend *, bs_n); | |
1931 | bs = g_new0(BlockDriverState *, bs_n); | |
1932 | bs_sectors = g_new(int64_t, bs_n); | |
1933 | ||
1934 | total_sectors = 0; | |
1935 | for (bs_i = 0; bs_i < bs_n; bs_i++) { | |
1936 | blk[bs_i] = img_open(image_opts, argv[optind + bs_i], | |
1937 | fmt, src_flags, src_writethrough, quiet); | |
1938 | if (!blk[bs_i]) { | |
1939 | ret = -1; | |
1940 | goto out; | |
1941 | } | |
1942 | bs[bs_i] = blk_bs(blk[bs_i]); | |
1943 | bs_sectors[bs_i] = blk_nb_sectors(blk[bs_i]); | |
1944 | if (bs_sectors[bs_i] < 0) { | |
1945 | error_report("Could not get size of %s: %s", | |
1946 | argv[optind + bs_i], strerror(-bs_sectors[bs_i])); | |
1947 | ret = -1; | |
1948 | goto out; | |
1949 | } | |
1950 | total_sectors += bs_sectors[bs_i]; | |
1951 | } | |
1952 | ||
1953 | if (sn_opts) { | |
1954 | ret = bdrv_snapshot_load_tmp(bs[0], | |
1955 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), | |
1956 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), | |
1957 | &local_err); | |
1958 | } else if (snapshot_name != NULL) { | |
1959 | if (bs_n > 1) { | |
1960 | error_report("No support for concatenating multiple snapshot"); | |
1961 | ret = -1; | |
1962 | goto out; | |
1963 | } | |
1964 | ||
1965 | bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err); | |
1966 | } | |
1967 | if (local_err) { | |
1968 | error_reportf_err(local_err, "Failed to load snapshot: "); | |
1969 | ret = -1; | |
1970 | goto out; | |
1971 | } | |
1972 | ||
1973 | /* Find driver and parse its options */ | |
1974 | drv = bdrv_find_format(out_fmt); | |
1975 | if (!drv) { | |
1976 | error_report("Unknown file format '%s'", out_fmt); | |
1977 | ret = -1; | |
1978 | goto out; | |
1979 | } | |
1980 | ||
1981 | proto_drv = bdrv_find_protocol(out_filename, true, &local_err); | |
1982 | if (!proto_drv) { | |
1983 | error_report_err(local_err); | |
1984 | ret = -1; | |
1985 | goto out; | |
1986 | } | |
1987 | ||
1988 | if (!skip_create) { | |
1989 | if (!drv->create_opts) { | |
1990 | error_report("Format driver '%s' does not support image creation", | |
1991 | drv->format_name); | |
1992 | ret = -1; | |
1993 | goto out; | |
1994 | } | |
1995 | ||
1996 | if (!proto_drv->create_opts) { | |
1997 | error_report("Protocol driver '%s' does not support image creation", | |
1998 | proto_drv->format_name); | |
1999 | ret = -1; | |
2000 | goto out; | |
2001 | } | |
2002 | ||
2003 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
2004 | create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); | |
2005 | ||
2006 | opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); | |
2007 | if (options) { | |
2008 | qemu_opts_do_parse(opts, options, NULL, &local_err); | |
2009 | if (local_err) { | |
2010 | error_report_err(local_err); | |
2011 | ret = -1; | |
2012 | goto out; | |
2013 | } | |
2014 | } | |
2015 | ||
2016 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512, | |
2017 | &error_abort); | |
2018 | ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL); | |
2019 | if (ret < 0) { | |
2020 | goto out; | |
2021 | } | |
2022 | } | |
2023 | ||
2024 | /* Get backing file name if -o backing_file was used */ | |
2025 | out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); | |
2026 | if (out_baseimg_param) { | |
2027 | out_baseimg = out_baseimg_param; | |
2028 | } | |
2029 | ||
2030 | /* Check if compression is supported */ | |
2031 | if (compress) { | |
2032 | bool encryption = | |
2033 | qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); | |
2034 | const char *preallocation = | |
2035 | qemu_opt_get(opts, BLOCK_OPT_PREALLOC); | |
2036 | ||
2037 | if (!drv->bdrv_co_pwritev_compressed) { | |
2038 | error_report("Compression not supported for this file format"); | |
2039 | ret = -1; | |
2040 | goto out; | |
2041 | } | |
2042 | ||
2043 | if (encryption) { | |
2044 | error_report("Compression and encryption not supported at " | |
2045 | "the same time"); | |
2046 | ret = -1; | |
2047 | goto out; | |
2048 | } | |
2049 | ||
2050 | if (preallocation | |
2051 | && strcmp(preallocation, "off")) | |
2052 | { | |
2053 | error_report("Compression and preallocation not supported at " | |
2054 | "the same time"); | |
2055 | ret = -1; | |
2056 | goto out; | |
2057 | } | |
2058 | } | |
2059 | ||
2060 | if (!skip_create) { | |
2061 | /* Create the new image */ | |
2062 | ret = bdrv_create(drv, out_filename, opts, &local_err); | |
2063 | if (ret < 0) { | |
2064 | error_reportf_err(local_err, "%s: error while converting %s: ", | |
2065 | out_filename, out_fmt); | |
2066 | goto out; | |
2067 | } | |
2068 | } | |
2069 | ||
2070 | flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; | |
2071 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
2072 | if (ret < 0) { | |
2073 | error_report("Invalid cache option: %s", cache); | |
2074 | goto out; | |
2075 | } | |
2076 | ||
2077 | /* XXX we should allow --image-opts to trigger use of | |
2078 | * img_open() here, but then we have trouble with | |
2079 | * the bdrv_create() call which takes different params. | |
2080 | * Not critical right now, so fix can wait... | |
2081 | */ | |
2082 | out_blk = img_open_file(out_filename, out_fmt, flags, writethrough, quiet); | |
2083 | if (!out_blk) { | |
2084 | ret = -1; | |
2085 | goto out; | |
2086 | } | |
2087 | out_bs = blk_bs(out_blk); | |
2088 | ||
2089 | /* increase bufsectors from the default 4096 (2M) if opt_transfer | |
2090 | * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB) | |
2091 | * as maximum. */ | |
2092 | bufsectors = MIN(32768, | |
2093 | MAX(bufsectors, | |
2094 | MAX(out_bs->bl.opt_transfer >> BDRV_SECTOR_BITS, | |
2095 | out_bs->bl.pdiscard_alignment >> | |
2096 | BDRV_SECTOR_BITS))); | |
2097 | ||
2098 | if (skip_create) { | |
2099 | int64_t output_sectors = blk_nb_sectors(out_blk); | |
2100 | if (output_sectors < 0) { | |
2101 | error_report("unable to get output image length: %s", | |
2102 | strerror(-output_sectors)); | |
2103 | ret = -1; | |
2104 | goto out; | |
2105 | } else if (output_sectors < total_sectors) { | |
2106 | error_report("output file is smaller than input file"); | |
2107 | ret = -1; | |
2108 | goto out; | |
2109 | } | |
2110 | } | |
2111 | ||
2112 | cluster_sectors = 0; | |
2113 | ret = bdrv_get_info(out_bs, &bdi); | |
2114 | if (ret < 0) { | |
2115 | if (compress) { | |
2116 | error_report("could not get block driver info"); | |
2117 | goto out; | |
2118 | } | |
2119 | } else { | |
2120 | compress = compress || bdi.needs_compressed_writes; | |
2121 | cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; | |
2122 | } | |
2123 | ||
2124 | state = (ImgConvertState) { | |
2125 | .src = blk, | |
2126 | .src_sectors = bs_sectors, | |
2127 | .src_num = bs_n, | |
2128 | .total_sectors = total_sectors, | |
2129 | .target = out_blk, | |
2130 | .compressed = compress, | |
2131 | .target_has_backing = (bool) out_baseimg, | |
2132 | .min_sparse = min_sparse, | |
2133 | .cluster_sectors = cluster_sectors, | |
2134 | .buf_sectors = bufsectors, | |
2135 | }; | |
2136 | ret = convert_do_copy(&state); | |
2137 | ||
2138 | out: | |
2139 | if (!ret) { | |
2140 | qemu_progress_print(100, 0); | |
2141 | } | |
2142 | qemu_progress_end(); | |
2143 | qemu_opts_del(opts); | |
2144 | qemu_opts_free(create_opts); | |
2145 | qemu_opts_del(sn_opts); | |
2146 | blk_unref(out_blk); | |
2147 | g_free(bs); | |
2148 | if (blk) { | |
2149 | for (bs_i = 0; bs_i < bs_n; bs_i++) { | |
2150 | blk_unref(blk[bs_i]); | |
2151 | } | |
2152 | g_free(blk); | |
2153 | } | |
2154 | g_free(bs_sectors); | |
2155 | fail_getopt: | |
2156 | g_free(options); | |
2157 | ||
2158 | if (ret) { | |
2159 | return 1; | |
2160 | } | |
2161 | return 0; | |
2162 | } | |
2163 | ||
2164 | ||
2165 | static void dump_snapshots(BlockDriverState *bs) | |
2166 | { | |
2167 | QEMUSnapshotInfo *sn_tab, *sn; | |
2168 | int nb_sns, i; | |
2169 | ||
2170 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2171 | if (nb_sns <= 0) | |
2172 | return; | |
2173 | printf("Snapshot list:\n"); | |
2174 | bdrv_snapshot_dump(fprintf, stdout, NULL); | |
2175 | printf("\n"); | |
2176 | for(i = 0; i < nb_sns; i++) { | |
2177 | sn = &sn_tab[i]; | |
2178 | bdrv_snapshot_dump(fprintf, stdout, sn); | |
2179 | printf("\n"); | |
2180 | } | |
2181 | g_free(sn_tab); | |
2182 | } | |
2183 | ||
2184 | static void dump_json_image_info_list(ImageInfoList *list) | |
2185 | { | |
2186 | QString *str; | |
2187 | QObject *obj; | |
2188 | Visitor *v = qmp_output_visitor_new(&obj); | |
2189 | ||
2190 | visit_type_ImageInfoList(v, NULL, &list, &error_abort); | |
2191 | visit_complete(v, &obj); | |
2192 | str = qobject_to_json_pretty(obj); | |
2193 | assert(str != NULL); | |
2194 | printf("%s\n", qstring_get_str(str)); | |
2195 | qobject_decref(obj); | |
2196 | visit_free(v); | |
2197 | QDECREF(str); | |
2198 | } | |
2199 | ||
2200 | static void dump_json_image_info(ImageInfo *info) | |
2201 | { | |
2202 | QString *str; | |
2203 | QObject *obj; | |
2204 | Visitor *v = qmp_output_visitor_new(&obj); | |
2205 | ||
2206 | visit_type_ImageInfo(v, NULL, &info, &error_abort); | |
2207 | visit_complete(v, &obj); | |
2208 | str = qobject_to_json_pretty(obj); | |
2209 | assert(str != NULL); | |
2210 | printf("%s\n", qstring_get_str(str)); | |
2211 | qobject_decref(obj); | |
2212 | visit_free(v); | |
2213 | QDECREF(str); | |
2214 | } | |
2215 | ||
2216 | static void dump_human_image_info_list(ImageInfoList *list) | |
2217 | { | |
2218 | ImageInfoList *elem; | |
2219 | bool delim = false; | |
2220 | ||
2221 | for (elem = list; elem; elem = elem->next) { | |
2222 | if (delim) { | |
2223 | printf("\n"); | |
2224 | } | |
2225 | delim = true; | |
2226 | ||
2227 | bdrv_image_info_dump(fprintf, stdout, elem->value); | |
2228 | } | |
2229 | } | |
2230 | ||
2231 | static gboolean str_equal_func(gconstpointer a, gconstpointer b) | |
2232 | { | |
2233 | return strcmp(a, b) == 0; | |
2234 | } | |
2235 | ||
2236 | /** | |
2237 | * Open an image file chain and return an ImageInfoList | |
2238 | * | |
2239 | * @filename: topmost image filename | |
2240 | * @fmt: topmost image format (may be NULL to autodetect) | |
2241 | * @chain: true - enumerate entire backing file chain | |
2242 | * false - only topmost image file | |
2243 | * | |
2244 | * Returns a list of ImageInfo objects or NULL if there was an error opening an | |
2245 | * image file. If there was an error a message will have been printed to | |
2246 | * stderr. | |
2247 | */ | |
2248 | static ImageInfoList *collect_image_info_list(bool image_opts, | |
2249 | const char *filename, | |
2250 | const char *fmt, | |
2251 | bool chain) | |
2252 | { | |
2253 | ImageInfoList *head = NULL; | |
2254 | ImageInfoList **last = &head; | |
2255 | GHashTable *filenames; | |
2256 | Error *err = NULL; | |
2257 | ||
2258 | filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); | |
2259 | ||
2260 | while (filename) { | |
2261 | BlockBackend *blk; | |
2262 | BlockDriverState *bs; | |
2263 | ImageInfo *info; | |
2264 | ImageInfoList *elem; | |
2265 | ||
2266 | if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { | |
2267 | error_report("Backing file '%s' creates an infinite loop.", | |
2268 | filename); | |
2269 | goto err; | |
2270 | } | |
2271 | g_hash_table_insert(filenames, (gpointer)filename, NULL); | |
2272 | ||
2273 | blk = img_open(image_opts, filename, fmt, | |
2274 | BDRV_O_NO_BACKING | BDRV_O_NO_IO, false, false); | |
2275 | if (!blk) { | |
2276 | goto err; | |
2277 | } | |
2278 | bs = blk_bs(blk); | |
2279 | ||
2280 | bdrv_query_image_info(bs, &info, &err); | |
2281 | if (err) { | |
2282 | error_report_err(err); | |
2283 | blk_unref(blk); | |
2284 | goto err; | |
2285 | } | |
2286 | ||
2287 | elem = g_new0(ImageInfoList, 1); | |
2288 | elem->value = info; | |
2289 | *last = elem; | |
2290 | last = &elem->next; | |
2291 | ||
2292 | blk_unref(blk); | |
2293 | ||
2294 | filename = fmt = NULL; | |
2295 | if (chain) { | |
2296 | if (info->has_full_backing_filename) { | |
2297 | filename = info->full_backing_filename; | |
2298 | } else if (info->has_backing_filename) { | |
2299 | error_report("Could not determine absolute backing filename," | |
2300 | " but backing filename '%s' present", | |
2301 | info->backing_filename); | |
2302 | goto err; | |
2303 | } | |
2304 | if (info->has_backing_filename_format) { | |
2305 | fmt = info->backing_filename_format; | |
2306 | } | |
2307 | } | |
2308 | } | |
2309 | g_hash_table_destroy(filenames); | |
2310 | return head; | |
2311 | ||
2312 | err: | |
2313 | qapi_free_ImageInfoList(head); | |
2314 | g_hash_table_destroy(filenames); | |
2315 | return NULL; | |
2316 | } | |
2317 | ||
2318 | static int img_info(int argc, char **argv) | |
2319 | { | |
2320 | int c; | |
2321 | OutputFormat output_format = OFORMAT_HUMAN; | |
2322 | bool chain = false; | |
2323 | const char *filename, *fmt, *output; | |
2324 | ImageInfoList *list; | |
2325 | bool image_opts = false; | |
2326 | ||
2327 | fmt = NULL; | |
2328 | output = NULL; | |
2329 | for(;;) { | |
2330 | int option_index = 0; | |
2331 | static const struct option long_options[] = { | |
2332 | {"help", no_argument, 0, 'h'}, | |
2333 | {"format", required_argument, 0, 'f'}, | |
2334 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
2335 | {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, | |
2336 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2337 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2338 | {0, 0, 0, 0} | |
2339 | }; | |
2340 | c = getopt_long(argc, argv, "f:h", | |
2341 | long_options, &option_index); | |
2342 | if (c == -1) { | |
2343 | break; | |
2344 | } | |
2345 | switch(c) { | |
2346 | case '?': | |
2347 | case 'h': | |
2348 | help(); | |
2349 | break; | |
2350 | case 'f': | |
2351 | fmt = optarg; | |
2352 | break; | |
2353 | case OPTION_OUTPUT: | |
2354 | output = optarg; | |
2355 | break; | |
2356 | case OPTION_BACKING_CHAIN: | |
2357 | chain = true; | |
2358 | break; | |
2359 | case OPTION_OBJECT: { | |
2360 | QemuOpts *opts; | |
2361 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
2362 | optarg, true); | |
2363 | if (!opts) { | |
2364 | return 1; | |
2365 | } | |
2366 | } break; | |
2367 | case OPTION_IMAGE_OPTS: | |
2368 | image_opts = true; | |
2369 | break; | |
2370 | } | |
2371 | } | |
2372 | if (optind != argc - 1) { | |
2373 | error_exit("Expecting one image file name"); | |
2374 | } | |
2375 | filename = argv[optind++]; | |
2376 | ||
2377 | if (output && !strcmp(output, "json")) { | |
2378 | output_format = OFORMAT_JSON; | |
2379 | } else if (output && !strcmp(output, "human")) { | |
2380 | output_format = OFORMAT_HUMAN; | |
2381 | } else if (output) { | |
2382 | error_report("--output must be used with human or json as argument."); | |
2383 | return 1; | |
2384 | } | |
2385 | ||
2386 | if (qemu_opts_foreach(&qemu_object_opts, | |
2387 | user_creatable_add_opts_foreach, | |
2388 | NULL, NULL)) { | |
2389 | return 1; | |
2390 | } | |
2391 | ||
2392 | list = collect_image_info_list(image_opts, filename, fmt, chain); | |
2393 | if (!list) { | |
2394 | return 1; | |
2395 | } | |
2396 | ||
2397 | switch (output_format) { | |
2398 | case OFORMAT_HUMAN: | |
2399 | dump_human_image_info_list(list); | |
2400 | break; | |
2401 | case OFORMAT_JSON: | |
2402 | if (chain) { | |
2403 | dump_json_image_info_list(list); | |
2404 | } else { | |
2405 | dump_json_image_info(list->value); | |
2406 | } | |
2407 | break; | |
2408 | } | |
2409 | ||
2410 | qapi_free_ImageInfoList(list); | |
2411 | return 0; | |
2412 | } | |
2413 | ||
2414 | static void dump_map_entry(OutputFormat output_format, MapEntry *e, | |
2415 | MapEntry *next) | |
2416 | { | |
2417 | switch (output_format) { | |
2418 | case OFORMAT_HUMAN: | |
2419 | if (e->data && !e->has_offset) { | |
2420 | error_report("File contains external, encrypted or compressed clusters."); | |
2421 | exit(1); | |
2422 | } | |
2423 | if (e->data && !e->zero) { | |
2424 | printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", | |
2425 | e->start, e->length, | |
2426 | e->has_offset ? e->offset : 0, | |
2427 | e->has_filename ? e->filename : ""); | |
2428 | } | |
2429 | /* This format ignores the distinction between 0, ZERO and ZERO|DATA. | |
2430 | * Modify the flags here to allow more coalescing. | |
2431 | */ | |
2432 | if (next && (!next->data || next->zero)) { | |
2433 | next->data = false; | |
2434 | next->zero = true; | |
2435 | } | |
2436 | break; | |
2437 | case OFORMAT_JSON: | |
2438 | printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64"," | |
2439 | " \"depth\": %"PRId64", \"zero\": %s, \"data\": %s", | |
2440 | (e->start == 0 ? "[" : ",\n"), | |
2441 | e->start, e->length, e->depth, | |
2442 | e->zero ? "true" : "false", | |
2443 | e->data ? "true" : "false"); | |
2444 | if (e->has_offset) { | |
2445 | printf(", \"offset\": %"PRId64"", e->offset); | |
2446 | } | |
2447 | putchar('}'); | |
2448 | ||
2449 | if (!next) { | |
2450 | printf("]\n"); | |
2451 | } | |
2452 | break; | |
2453 | } | |
2454 | } | |
2455 | ||
2456 | static int get_block_status(BlockDriverState *bs, int64_t sector_num, | |
2457 | int nb_sectors, MapEntry *e) | |
2458 | { | |
2459 | int64_t ret; | |
2460 | int depth; | |
2461 | BlockDriverState *file; | |
2462 | bool has_offset; | |
2463 | ||
2464 | /* As an optimization, we could cache the current range of unallocated | |
2465 | * clusters in each file of the chain, and avoid querying the same | |
2466 | * range repeatedly. | |
2467 | */ | |
2468 | ||
2469 | depth = 0; | |
2470 | for (;;) { | |
2471 | ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors, | |
2472 | &file); | |
2473 | if (ret < 0) { | |
2474 | return ret; | |
2475 | } | |
2476 | assert(nb_sectors); | |
2477 | if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { | |
2478 | break; | |
2479 | } | |
2480 | bs = backing_bs(bs); | |
2481 | if (bs == NULL) { | |
2482 | ret = 0; | |
2483 | break; | |
2484 | } | |
2485 | ||
2486 | depth++; | |
2487 | } | |
2488 | ||
2489 | has_offset = !!(ret & BDRV_BLOCK_OFFSET_VALID); | |
2490 | ||
2491 | *e = (MapEntry) { | |
2492 | .start = sector_num * BDRV_SECTOR_SIZE, | |
2493 | .length = nb_sectors * BDRV_SECTOR_SIZE, | |
2494 | .data = !!(ret & BDRV_BLOCK_DATA), | |
2495 | .zero = !!(ret & BDRV_BLOCK_ZERO), | |
2496 | .offset = ret & BDRV_BLOCK_OFFSET_MASK, | |
2497 | .has_offset = has_offset, | |
2498 | .depth = depth, | |
2499 | .has_filename = file && has_offset, | |
2500 | .filename = file && has_offset ? file->filename : NULL, | |
2501 | }; | |
2502 | ||
2503 | return 0; | |
2504 | } | |
2505 | ||
2506 | static inline bool entry_mergeable(const MapEntry *curr, const MapEntry *next) | |
2507 | { | |
2508 | if (curr->length == 0) { | |
2509 | return false; | |
2510 | } | |
2511 | if (curr->zero != next->zero || | |
2512 | curr->data != next->data || | |
2513 | curr->depth != next->depth || | |
2514 | curr->has_filename != next->has_filename || | |
2515 | curr->has_offset != next->has_offset) { | |
2516 | return false; | |
2517 | } | |
2518 | if (curr->has_filename && strcmp(curr->filename, next->filename)) { | |
2519 | return false; | |
2520 | } | |
2521 | if (curr->has_offset && curr->offset + curr->length != next->offset) { | |
2522 | return false; | |
2523 | } | |
2524 | return true; | |
2525 | } | |
2526 | ||
2527 | static int img_map(int argc, char **argv) | |
2528 | { | |
2529 | int c; | |
2530 | OutputFormat output_format = OFORMAT_HUMAN; | |
2531 | BlockBackend *blk; | |
2532 | BlockDriverState *bs; | |
2533 | const char *filename, *fmt, *output; | |
2534 | int64_t length; | |
2535 | MapEntry curr = { .length = 0 }, next; | |
2536 | int ret = 0; | |
2537 | bool image_opts = false; | |
2538 | ||
2539 | fmt = NULL; | |
2540 | output = NULL; | |
2541 | for (;;) { | |
2542 | int option_index = 0; | |
2543 | static const struct option long_options[] = { | |
2544 | {"help", no_argument, 0, 'h'}, | |
2545 | {"format", required_argument, 0, 'f'}, | |
2546 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
2547 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2548 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2549 | {0, 0, 0, 0} | |
2550 | }; | |
2551 | c = getopt_long(argc, argv, "f:h", | |
2552 | long_options, &option_index); | |
2553 | if (c == -1) { | |
2554 | break; | |
2555 | } | |
2556 | switch (c) { | |
2557 | case '?': | |
2558 | case 'h': | |
2559 | help(); | |
2560 | break; | |
2561 | case 'f': | |
2562 | fmt = optarg; | |
2563 | break; | |
2564 | case OPTION_OUTPUT: | |
2565 | output = optarg; | |
2566 | break; | |
2567 | case OPTION_OBJECT: { | |
2568 | QemuOpts *opts; | |
2569 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
2570 | optarg, true); | |
2571 | if (!opts) { | |
2572 | return 1; | |
2573 | } | |
2574 | } break; | |
2575 | case OPTION_IMAGE_OPTS: | |
2576 | image_opts = true; | |
2577 | break; | |
2578 | } | |
2579 | } | |
2580 | if (optind != argc - 1) { | |
2581 | error_exit("Expecting one image file name"); | |
2582 | } | |
2583 | filename = argv[optind]; | |
2584 | ||
2585 | if (output && !strcmp(output, "json")) { | |
2586 | output_format = OFORMAT_JSON; | |
2587 | } else if (output && !strcmp(output, "human")) { | |
2588 | output_format = OFORMAT_HUMAN; | |
2589 | } else if (output) { | |
2590 | error_report("--output must be used with human or json as argument."); | |
2591 | return 1; | |
2592 | } | |
2593 | ||
2594 | if (qemu_opts_foreach(&qemu_object_opts, | |
2595 | user_creatable_add_opts_foreach, | |
2596 | NULL, NULL)) { | |
2597 | return 1; | |
2598 | } | |
2599 | ||
2600 | blk = img_open(image_opts, filename, fmt, 0, false, false); | |
2601 | if (!blk) { | |
2602 | return 1; | |
2603 | } | |
2604 | bs = blk_bs(blk); | |
2605 | ||
2606 | if (output_format == OFORMAT_HUMAN) { | |
2607 | printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); | |
2608 | } | |
2609 | ||
2610 | length = blk_getlength(blk); | |
2611 | while (curr.start + curr.length < length) { | |
2612 | int64_t nsectors_left; | |
2613 | int64_t sector_num; | |
2614 | int n; | |
2615 | ||
2616 | sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS; | |
2617 | ||
2618 | /* Probe up to 1 GiB at a time. */ | |
2619 | nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num; | |
2620 | n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left); | |
2621 | ret = get_block_status(bs, sector_num, n, &next); | |
2622 | ||
2623 | if (ret < 0) { | |
2624 | error_report("Could not read file metadata: %s", strerror(-ret)); | |
2625 | goto out; | |
2626 | } | |
2627 | ||
2628 | if (entry_mergeable(&curr, &next)) { | |
2629 | curr.length += next.length; | |
2630 | continue; | |
2631 | } | |
2632 | ||
2633 | if (curr.length > 0) { | |
2634 | dump_map_entry(output_format, &curr, &next); | |
2635 | } | |
2636 | curr = next; | |
2637 | } | |
2638 | ||
2639 | dump_map_entry(output_format, &curr, NULL); | |
2640 | ||
2641 | out: | |
2642 | blk_unref(blk); | |
2643 | return ret < 0; | |
2644 | } | |
2645 | ||
2646 | #define SNAPSHOT_LIST 1 | |
2647 | #define SNAPSHOT_CREATE 2 | |
2648 | #define SNAPSHOT_APPLY 3 | |
2649 | #define SNAPSHOT_DELETE 4 | |
2650 | ||
2651 | static int img_snapshot(int argc, char **argv) | |
2652 | { | |
2653 | BlockBackend *blk; | |
2654 | BlockDriverState *bs; | |
2655 | QEMUSnapshotInfo sn; | |
2656 | char *filename, *snapshot_name = NULL; | |
2657 | int c, ret = 0, bdrv_oflags; | |
2658 | int action = 0; | |
2659 | qemu_timeval tv; | |
2660 | bool quiet = false; | |
2661 | Error *err = NULL; | |
2662 | bool image_opts = false; | |
2663 | ||
2664 | bdrv_oflags = BDRV_O_RDWR; | |
2665 | /* Parse commandline parameters */ | |
2666 | for(;;) { | |
2667 | static const struct option long_options[] = { | |
2668 | {"help", no_argument, 0, 'h'}, | |
2669 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2670 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2671 | {0, 0, 0, 0} | |
2672 | }; | |
2673 | c = getopt_long(argc, argv, "la:c:d:hq", | |
2674 | long_options, NULL); | |
2675 | if (c == -1) { | |
2676 | break; | |
2677 | } | |
2678 | switch(c) { | |
2679 | case '?': | |
2680 | case 'h': | |
2681 | help(); | |
2682 | return 0; | |
2683 | case 'l': | |
2684 | if (action) { | |
2685 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
2686 | return 0; | |
2687 | } | |
2688 | action = SNAPSHOT_LIST; | |
2689 | bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ | |
2690 | break; | |
2691 | case 'a': | |
2692 | if (action) { | |
2693 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
2694 | return 0; | |
2695 | } | |
2696 | action = SNAPSHOT_APPLY; | |
2697 | snapshot_name = optarg; | |
2698 | break; | |
2699 | case 'c': | |
2700 | if (action) { | |
2701 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
2702 | return 0; | |
2703 | } | |
2704 | action = SNAPSHOT_CREATE; | |
2705 | snapshot_name = optarg; | |
2706 | break; | |
2707 | case 'd': | |
2708 | if (action) { | |
2709 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
2710 | return 0; | |
2711 | } | |
2712 | action = SNAPSHOT_DELETE; | |
2713 | snapshot_name = optarg; | |
2714 | break; | |
2715 | case 'q': | |
2716 | quiet = true; | |
2717 | break; | |
2718 | case OPTION_OBJECT: { | |
2719 | QemuOpts *opts; | |
2720 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
2721 | optarg, true); | |
2722 | if (!opts) { | |
2723 | return 1; | |
2724 | } | |
2725 | } break; | |
2726 | case OPTION_IMAGE_OPTS: | |
2727 | image_opts = true; | |
2728 | break; | |
2729 | } | |
2730 | } | |
2731 | ||
2732 | if (optind != argc - 1) { | |
2733 | error_exit("Expecting one image file name"); | |
2734 | } | |
2735 | filename = argv[optind++]; | |
2736 | ||
2737 | if (qemu_opts_foreach(&qemu_object_opts, | |
2738 | user_creatable_add_opts_foreach, | |
2739 | NULL, NULL)) { | |
2740 | return 1; | |
2741 | } | |
2742 | ||
2743 | /* Open the image */ | |
2744 | blk = img_open(image_opts, filename, NULL, bdrv_oflags, false, quiet); | |
2745 | if (!blk) { | |
2746 | return 1; | |
2747 | } | |
2748 | bs = blk_bs(blk); | |
2749 | ||
2750 | /* Perform the requested action */ | |
2751 | switch(action) { | |
2752 | case SNAPSHOT_LIST: | |
2753 | dump_snapshots(bs); | |
2754 | break; | |
2755 | ||
2756 | case SNAPSHOT_CREATE: | |
2757 | memset(&sn, 0, sizeof(sn)); | |
2758 | pstrcpy(sn.name, sizeof(sn.name), snapshot_name); | |
2759 | ||
2760 | qemu_gettimeofday(&tv); | |
2761 | sn.date_sec = tv.tv_sec; | |
2762 | sn.date_nsec = tv.tv_usec * 1000; | |
2763 | ||
2764 | ret = bdrv_snapshot_create(bs, &sn); | |
2765 | if (ret) { | |
2766 | error_report("Could not create snapshot '%s': %d (%s)", | |
2767 | snapshot_name, ret, strerror(-ret)); | |
2768 | } | |
2769 | break; | |
2770 | ||
2771 | case SNAPSHOT_APPLY: | |
2772 | ret = bdrv_snapshot_goto(bs, snapshot_name); | |
2773 | if (ret) { | |
2774 | error_report("Could not apply snapshot '%s': %d (%s)", | |
2775 | snapshot_name, ret, strerror(-ret)); | |
2776 | } | |
2777 | break; | |
2778 | ||
2779 | case SNAPSHOT_DELETE: | |
2780 | bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err); | |
2781 | if (err) { | |
2782 | error_reportf_err(err, "Could not delete snapshot '%s': ", | |
2783 | snapshot_name); | |
2784 | ret = 1; | |
2785 | } | |
2786 | break; | |
2787 | } | |
2788 | ||
2789 | /* Cleanup */ | |
2790 | blk_unref(blk); | |
2791 | if (ret) { | |
2792 | return 1; | |
2793 | } | |
2794 | return 0; | |
2795 | } | |
2796 | ||
2797 | static int img_rebase(int argc, char **argv) | |
2798 | { | |
2799 | BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL; | |
2800 | uint8_t *buf_old = NULL; | |
2801 | uint8_t *buf_new = NULL; | |
2802 | BlockDriverState *bs = NULL; | |
2803 | char *filename; | |
2804 | const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; | |
2805 | int c, flags, src_flags, ret; | |
2806 | bool writethrough, src_writethrough; | |
2807 | int unsafe = 0; | |
2808 | int progress = 0; | |
2809 | bool quiet = false; | |
2810 | Error *local_err = NULL; | |
2811 | bool image_opts = false; | |
2812 | ||
2813 | /* Parse commandline parameters */ | |
2814 | fmt = NULL; | |
2815 | cache = BDRV_DEFAULT_CACHE; | |
2816 | src_cache = BDRV_DEFAULT_CACHE; | |
2817 | out_baseimg = NULL; | |
2818 | out_basefmt = NULL; | |
2819 | for(;;) { | |
2820 | static const struct option long_options[] = { | |
2821 | {"help", no_argument, 0, 'h'}, | |
2822 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2823 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2824 | {0, 0, 0, 0} | |
2825 | }; | |
2826 | c = getopt_long(argc, argv, "hf:F:b:upt:T:q", | |
2827 | long_options, NULL); | |
2828 | if (c == -1) { | |
2829 | break; | |
2830 | } | |
2831 | switch(c) { | |
2832 | case '?': | |
2833 | case 'h': | |
2834 | help(); | |
2835 | return 0; | |
2836 | case 'f': | |
2837 | fmt = optarg; | |
2838 | break; | |
2839 | case 'F': | |
2840 | out_basefmt = optarg; | |
2841 | break; | |
2842 | case 'b': | |
2843 | out_baseimg = optarg; | |
2844 | break; | |
2845 | case 'u': | |
2846 | unsafe = 1; | |
2847 | break; | |
2848 | case 'p': | |
2849 | progress = 1; | |
2850 | break; | |
2851 | case 't': | |
2852 | cache = optarg; | |
2853 | break; | |
2854 | case 'T': | |
2855 | src_cache = optarg; | |
2856 | break; | |
2857 | case 'q': | |
2858 | quiet = true; | |
2859 | break; | |
2860 | case OPTION_OBJECT: { | |
2861 | QemuOpts *opts; | |
2862 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
2863 | optarg, true); | |
2864 | if (!opts) { | |
2865 | return 1; | |
2866 | } | |
2867 | } break; | |
2868 | case OPTION_IMAGE_OPTS: | |
2869 | image_opts = true; | |
2870 | break; | |
2871 | } | |
2872 | } | |
2873 | ||
2874 | if (quiet) { | |
2875 | progress = 0; | |
2876 | } | |
2877 | ||
2878 | if (optind != argc - 1) { | |
2879 | error_exit("Expecting one image file name"); | |
2880 | } | |
2881 | if (!unsafe && !out_baseimg) { | |
2882 | error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); | |
2883 | } | |
2884 | filename = argv[optind++]; | |
2885 | ||
2886 | if (qemu_opts_foreach(&qemu_object_opts, | |
2887 | user_creatable_add_opts_foreach, | |
2888 | NULL, NULL)) { | |
2889 | return 1; | |
2890 | } | |
2891 | ||
2892 | qemu_progress_init(progress, 2.0); | |
2893 | qemu_progress_print(0, 100); | |
2894 | ||
2895 | flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); | |
2896 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
2897 | if (ret < 0) { | |
2898 | error_report("Invalid cache option: %s", cache); | |
2899 | goto out; | |
2900 | } | |
2901 | ||
2902 | src_flags = 0; | |
2903 | ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough); | |
2904 | if (ret < 0) { | |
2905 | error_report("Invalid source cache option: %s", src_cache); | |
2906 | goto out; | |
2907 | } | |
2908 | ||
2909 | /* The source files are opened read-only, don't care about WCE */ | |
2910 | assert((src_flags & BDRV_O_RDWR) == 0); | |
2911 | (void) src_writethrough; | |
2912 | ||
2913 | /* | |
2914 | * Open the images. | |
2915 | * | |
2916 | * Ignore the old backing file for unsafe rebase in case we want to correct | |
2917 | * the reference to a renamed or moved backing file. | |
2918 | */ | |
2919 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); | |
2920 | if (!blk) { | |
2921 | ret = -1; | |
2922 | goto out; | |
2923 | } | |
2924 | bs = blk_bs(blk); | |
2925 | ||
2926 | if (out_basefmt != NULL) { | |
2927 | if (bdrv_find_format(out_basefmt) == NULL) { | |
2928 | error_report("Invalid format name: '%s'", out_basefmt); | |
2929 | ret = -1; | |
2930 | goto out; | |
2931 | } | |
2932 | } | |
2933 | ||
2934 | /* For safe rebasing we need to compare old and new backing file */ | |
2935 | if (!unsafe) { | |
2936 | char backing_name[PATH_MAX]; | |
2937 | QDict *options = NULL; | |
2938 | ||
2939 | if (bs->backing_format[0] != '\0') { | |
2940 | options = qdict_new(); | |
2941 | qdict_put(options, "driver", qstring_from_str(bs->backing_format)); | |
2942 | } | |
2943 | ||
2944 | bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); | |
2945 | blk_old_backing = blk_new_open(backing_name, NULL, | |
2946 | options, src_flags, &local_err); | |
2947 | if (!blk_old_backing) { | |
2948 | error_reportf_err(local_err, | |
2949 | "Could not open old backing file '%s': ", | |
2950 | backing_name); | |
2951 | goto out; | |
2952 | } | |
2953 | ||
2954 | if (out_baseimg[0]) { | |
2955 | if (out_basefmt) { | |
2956 | options = qdict_new(); | |
2957 | qdict_put(options, "driver", qstring_from_str(out_basefmt)); | |
2958 | } else { | |
2959 | options = NULL; | |
2960 | } | |
2961 | ||
2962 | blk_new_backing = blk_new_open(out_baseimg, NULL, | |
2963 | options, src_flags, &local_err); | |
2964 | if (!blk_new_backing) { | |
2965 | error_reportf_err(local_err, | |
2966 | "Could not open new backing file '%s': ", | |
2967 | out_baseimg); | |
2968 | goto out; | |
2969 | } | |
2970 | } | |
2971 | } | |
2972 | ||
2973 | /* | |
2974 | * Check each unallocated cluster in the COW file. If it is unallocated, | |
2975 | * accesses go to the backing file. We must therefore compare this cluster | |
2976 | * in the old and new backing file, and if they differ we need to copy it | |
2977 | * from the old backing file into the COW file. | |
2978 | * | |
2979 | * If qemu-img crashes during this step, no harm is done. The content of | |
2980 | * the image is the same as the original one at any time. | |
2981 | */ | |
2982 | if (!unsafe) { | |
2983 | int64_t num_sectors; | |
2984 | int64_t old_backing_num_sectors; | |
2985 | int64_t new_backing_num_sectors = 0; | |
2986 | uint64_t sector; | |
2987 | int n; | |
2988 | float local_progress = 0; | |
2989 | ||
2990 | buf_old = blk_blockalign(blk, IO_BUF_SIZE); | |
2991 | buf_new = blk_blockalign(blk, IO_BUF_SIZE); | |
2992 | ||
2993 | num_sectors = blk_nb_sectors(blk); | |
2994 | if (num_sectors < 0) { | |
2995 | error_report("Could not get size of '%s': %s", | |
2996 | filename, strerror(-num_sectors)); | |
2997 | ret = -1; | |
2998 | goto out; | |
2999 | } | |
3000 | old_backing_num_sectors = blk_nb_sectors(blk_old_backing); | |
3001 | if (old_backing_num_sectors < 0) { | |
3002 | char backing_name[PATH_MAX]; | |
3003 | ||
3004 | bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); | |
3005 | error_report("Could not get size of '%s': %s", | |
3006 | backing_name, strerror(-old_backing_num_sectors)); | |
3007 | ret = -1; | |
3008 | goto out; | |
3009 | } | |
3010 | if (blk_new_backing) { | |
3011 | new_backing_num_sectors = blk_nb_sectors(blk_new_backing); | |
3012 | if (new_backing_num_sectors < 0) { | |
3013 | error_report("Could not get size of '%s': %s", | |
3014 | out_baseimg, strerror(-new_backing_num_sectors)); | |
3015 | ret = -1; | |
3016 | goto out; | |
3017 | } | |
3018 | } | |
3019 | ||
3020 | if (num_sectors != 0) { | |
3021 | local_progress = (float)100 / | |
3022 | (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512)); | |
3023 | } | |
3024 | ||
3025 | for (sector = 0; sector < num_sectors; sector += n) { | |
3026 | ||
3027 | /* How many sectors can we handle with the next read? */ | |
3028 | if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { | |
3029 | n = (IO_BUF_SIZE / 512); | |
3030 | } else { | |
3031 | n = num_sectors - sector; | |
3032 | } | |
3033 | ||
3034 | /* If the cluster is allocated, we don't need to take action */ | |
3035 | ret = bdrv_is_allocated(bs, sector, n, &n); | |
3036 | if (ret < 0) { | |
3037 | error_report("error while reading image metadata: %s", | |
3038 | strerror(-ret)); | |
3039 | goto out; | |
3040 | } | |
3041 | if (ret) { | |
3042 | continue; | |
3043 | } | |
3044 | ||
3045 | /* | |
3046 | * Read old and new backing file and take into consideration that | |
3047 | * backing files may be smaller than the COW image. | |
3048 | */ | |
3049 | if (sector >= old_backing_num_sectors) { | |
3050 | memset(buf_old, 0, n * BDRV_SECTOR_SIZE); | |
3051 | } else { | |
3052 | if (sector + n > old_backing_num_sectors) { | |
3053 | n = old_backing_num_sectors - sector; | |
3054 | } | |
3055 | ||
3056 | ret = blk_pread(blk_old_backing, sector << BDRV_SECTOR_BITS, | |
3057 | buf_old, n << BDRV_SECTOR_BITS); | |
3058 | if (ret < 0) { | |
3059 | error_report("error while reading from old backing file"); | |
3060 | goto out; | |
3061 | } | |
3062 | } | |
3063 | ||
3064 | if (sector >= new_backing_num_sectors || !blk_new_backing) { | |
3065 | memset(buf_new, 0, n * BDRV_SECTOR_SIZE); | |
3066 | } else { | |
3067 | if (sector + n > new_backing_num_sectors) { | |
3068 | n = new_backing_num_sectors - sector; | |
3069 | } | |
3070 | ||
3071 | ret = blk_pread(blk_new_backing, sector << BDRV_SECTOR_BITS, | |
3072 | buf_new, n << BDRV_SECTOR_BITS); | |
3073 | if (ret < 0) { | |
3074 | error_report("error while reading from new backing file"); | |
3075 | goto out; | |
3076 | } | |
3077 | } | |
3078 | ||
3079 | /* If they differ, we need to write to the COW file */ | |
3080 | uint64_t written = 0; | |
3081 | ||
3082 | while (written < n) { | |
3083 | int pnum; | |
3084 | ||
3085 | if (compare_sectors(buf_old + written * 512, | |
3086 | buf_new + written * 512, n - written, &pnum)) | |
3087 | { | |
3088 | ret = blk_pwrite(blk, | |
3089 | (sector + written) << BDRV_SECTOR_BITS, | |
3090 | buf_old + written * 512, | |
3091 | pnum << BDRV_SECTOR_BITS, 0); | |
3092 | if (ret < 0) { | |
3093 | error_report("Error while writing to COW image: %s", | |
3094 | strerror(-ret)); | |
3095 | goto out; | |
3096 | } | |
3097 | } | |
3098 | ||
3099 | written += pnum; | |
3100 | } | |
3101 | qemu_progress_print(local_progress, 100); | |
3102 | } | |
3103 | } | |
3104 | ||
3105 | /* | |
3106 | * Change the backing file. All clusters that are different from the old | |
3107 | * backing file are overwritten in the COW file now, so the visible content | |
3108 | * doesn't change when we switch the backing file. | |
3109 | */ | |
3110 | if (out_baseimg && *out_baseimg) { | |
3111 | ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); | |
3112 | } else { | |
3113 | ret = bdrv_change_backing_file(bs, NULL, NULL); | |
3114 | } | |
3115 | ||
3116 | if (ret == -ENOSPC) { | |
3117 | error_report("Could not change the backing file to '%s': No " | |
3118 | "space left in the file header", out_baseimg); | |
3119 | } else if (ret < 0) { | |
3120 | error_report("Could not change the backing file to '%s': %s", | |
3121 | out_baseimg, strerror(-ret)); | |
3122 | } | |
3123 | ||
3124 | qemu_progress_print(100, 0); | |
3125 | /* | |
3126 | * TODO At this point it is possible to check if any clusters that are | |
3127 | * allocated in the COW file are the same in the backing file. If so, they | |
3128 | * could be dropped from the COW file. Don't do this before switching the | |
3129 | * backing file, in case of a crash this would lead to corruption. | |
3130 | */ | |
3131 | out: | |
3132 | qemu_progress_end(); | |
3133 | /* Cleanup */ | |
3134 | if (!unsafe) { | |
3135 | blk_unref(blk_old_backing); | |
3136 | blk_unref(blk_new_backing); | |
3137 | } | |
3138 | qemu_vfree(buf_old); | |
3139 | qemu_vfree(buf_new); | |
3140 | ||
3141 | blk_unref(blk); | |
3142 | if (ret) { | |
3143 | return 1; | |
3144 | } | |
3145 | return 0; | |
3146 | } | |
3147 | ||
3148 | static int img_resize(int argc, char **argv) | |
3149 | { | |
3150 | Error *err = NULL; | |
3151 | int c, ret, relative; | |
3152 | const char *filename, *fmt, *size; | |
3153 | int64_t n, total_size; | |
3154 | bool quiet = false; | |
3155 | BlockBackend *blk = NULL; | |
3156 | QemuOpts *param; | |
3157 | ||
3158 | static QemuOptsList resize_options = { | |
3159 | .name = "resize_options", | |
3160 | .head = QTAILQ_HEAD_INITIALIZER(resize_options.head), | |
3161 | .desc = { | |
3162 | { | |
3163 | .name = BLOCK_OPT_SIZE, | |
3164 | .type = QEMU_OPT_SIZE, | |
3165 | .help = "Virtual disk size" | |
3166 | }, { | |
3167 | /* end of list */ | |
3168 | } | |
3169 | }, | |
3170 | }; | |
3171 | bool image_opts = false; | |
3172 | ||
3173 | /* Remove size from argv manually so that negative numbers are not treated | |
3174 | * as options by getopt. */ | |
3175 | if (argc < 3) { | |
3176 | error_exit("Not enough arguments"); | |
3177 | return 1; | |
3178 | } | |
3179 | ||
3180 | size = argv[--argc]; | |
3181 | ||
3182 | /* Parse getopt arguments */ | |
3183 | fmt = NULL; | |
3184 | for(;;) { | |
3185 | static const struct option long_options[] = { | |
3186 | {"help", no_argument, 0, 'h'}, | |
3187 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3188 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3189 | {0, 0, 0, 0} | |
3190 | }; | |
3191 | c = getopt_long(argc, argv, "f:hq", | |
3192 | long_options, NULL); | |
3193 | if (c == -1) { | |
3194 | break; | |
3195 | } | |
3196 | switch(c) { | |
3197 | case '?': | |
3198 | case 'h': | |
3199 | help(); | |
3200 | break; | |
3201 | case 'f': | |
3202 | fmt = optarg; | |
3203 | break; | |
3204 | case 'q': | |
3205 | quiet = true; | |
3206 | break; | |
3207 | case OPTION_OBJECT: { | |
3208 | QemuOpts *opts; | |
3209 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
3210 | optarg, true); | |
3211 | if (!opts) { | |
3212 | return 1; | |
3213 | } | |
3214 | } break; | |
3215 | case OPTION_IMAGE_OPTS: | |
3216 | image_opts = true; | |
3217 | break; | |
3218 | } | |
3219 | } | |
3220 | if (optind != argc - 1) { | |
3221 | error_exit("Expecting one image file name"); | |
3222 | } | |
3223 | filename = argv[optind++]; | |
3224 | ||
3225 | if (qemu_opts_foreach(&qemu_object_opts, | |
3226 | user_creatable_add_opts_foreach, | |
3227 | NULL, NULL)) { | |
3228 | return 1; | |
3229 | } | |
3230 | ||
3231 | /* Choose grow, shrink, or absolute resize mode */ | |
3232 | switch (size[0]) { | |
3233 | case '+': | |
3234 | relative = 1; | |
3235 | size++; | |
3236 | break; | |
3237 | case '-': | |
3238 | relative = -1; | |
3239 | size++; | |
3240 | break; | |
3241 | default: | |
3242 | relative = 0; | |
3243 | break; | |
3244 | } | |
3245 | ||
3246 | /* Parse size */ | |
3247 | param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); | |
3248 | qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err); | |
3249 | if (err) { | |
3250 | error_report_err(err); | |
3251 | ret = -1; | |
3252 | qemu_opts_del(param); | |
3253 | goto out; | |
3254 | } | |
3255 | n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); | |
3256 | qemu_opts_del(param); | |
3257 | ||
3258 | blk = img_open(image_opts, filename, fmt, | |
3259 | BDRV_O_RDWR, false, quiet); | |
3260 | if (!blk) { | |
3261 | ret = -1; | |
3262 | goto out; | |
3263 | } | |
3264 | ||
3265 | if (relative) { | |
3266 | total_size = blk_getlength(blk) + n * relative; | |
3267 | } else { | |
3268 | total_size = n; | |
3269 | } | |
3270 | if (total_size <= 0) { | |
3271 | error_report("New image size must be positive"); | |
3272 | ret = -1; | |
3273 | goto out; | |
3274 | } | |
3275 | ||
3276 | ret = blk_truncate(blk, total_size); | |
3277 | switch (ret) { | |
3278 | case 0: | |
3279 | qprintf(quiet, "Image resized.\n"); | |
3280 | break; | |
3281 | case -ENOTSUP: | |
3282 | error_report("This image does not support resize"); | |
3283 | break; | |
3284 | case -EACCES: | |
3285 | error_report("Image is read-only"); | |
3286 | break; | |
3287 | default: | |
3288 | error_report("Error resizing image: %s", strerror(-ret)); | |
3289 | break; | |
3290 | } | |
3291 | out: | |
3292 | blk_unref(blk); | |
3293 | if (ret) { | |
3294 | return 1; | |
3295 | } | |
3296 | return 0; | |
3297 | } | |
3298 | ||
3299 | static void amend_status_cb(BlockDriverState *bs, | |
3300 | int64_t offset, int64_t total_work_size, | |
3301 | void *opaque) | |
3302 | { | |
3303 | qemu_progress_print(100.f * offset / total_work_size, 0); | |
3304 | } | |
3305 | ||
3306 | static int img_amend(int argc, char **argv) | |
3307 | { | |
3308 | Error *err = NULL; | |
3309 | int c, ret = 0; | |
3310 | char *options = NULL; | |
3311 | QemuOptsList *create_opts = NULL; | |
3312 | QemuOpts *opts = NULL; | |
3313 | const char *fmt = NULL, *filename, *cache; | |
3314 | int flags; | |
3315 | bool writethrough; | |
3316 | bool quiet = false, progress = false; | |
3317 | BlockBackend *blk = NULL; | |
3318 | BlockDriverState *bs = NULL; | |
3319 | bool image_opts = false; | |
3320 | ||
3321 | cache = BDRV_DEFAULT_CACHE; | |
3322 | for (;;) { | |
3323 | static const struct option long_options[] = { | |
3324 | {"help", no_argument, 0, 'h'}, | |
3325 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3326 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3327 | {0, 0, 0, 0} | |
3328 | }; | |
3329 | c = getopt_long(argc, argv, "ho:f:t:pq", | |
3330 | long_options, NULL); | |
3331 | if (c == -1) { | |
3332 | break; | |
3333 | } | |
3334 | ||
3335 | switch (c) { | |
3336 | case 'h': | |
3337 | case '?': | |
3338 | help(); | |
3339 | break; | |
3340 | case 'o': | |
3341 | if (!is_valid_option_list(optarg)) { | |
3342 | error_report("Invalid option list: %s", optarg); | |
3343 | ret = -1; | |
3344 | goto out_no_progress; | |
3345 | } | |
3346 | if (!options) { | |
3347 | options = g_strdup(optarg); | |
3348 | } else { | |
3349 | char *old_options = options; | |
3350 | options = g_strdup_printf("%s,%s", options, optarg); | |
3351 | g_free(old_options); | |
3352 | } | |
3353 | break; | |
3354 | case 'f': | |
3355 | fmt = optarg; | |
3356 | break; | |
3357 | case 't': | |
3358 | cache = optarg; | |
3359 | break; | |
3360 | case 'p': | |
3361 | progress = true; | |
3362 | break; | |
3363 | case 'q': | |
3364 | quiet = true; | |
3365 | break; | |
3366 | case OPTION_OBJECT: | |
3367 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
3368 | optarg, true); | |
3369 | if (!opts) { | |
3370 | ret = -1; | |
3371 | goto out_no_progress; | |
3372 | } | |
3373 | break; | |
3374 | case OPTION_IMAGE_OPTS: | |
3375 | image_opts = true; | |
3376 | break; | |
3377 | } | |
3378 | } | |
3379 | ||
3380 | if (!options) { | |
3381 | error_exit("Must specify options (-o)"); | |
3382 | } | |
3383 | ||
3384 | if (qemu_opts_foreach(&qemu_object_opts, | |
3385 | user_creatable_add_opts_foreach, | |
3386 | NULL, NULL)) { | |
3387 | ret = -1; | |
3388 | goto out_no_progress; | |
3389 | } | |
3390 | ||
3391 | if (quiet) { | |
3392 | progress = false; | |
3393 | } | |
3394 | qemu_progress_init(progress, 1.0); | |
3395 | ||
3396 | filename = (optind == argc - 1) ? argv[argc - 1] : NULL; | |
3397 | if (fmt && has_help_option(options)) { | |
3398 | /* If a format is explicitly specified (and possibly no filename is | |
3399 | * given), print option help here */ | |
3400 | ret = print_block_option_help(filename, fmt); | |
3401 | goto out; | |
3402 | } | |
3403 | ||
3404 | if (optind != argc - 1) { | |
3405 | error_report("Expecting one image file name"); | |
3406 | ret = -1; | |
3407 | goto out; | |
3408 | } | |
3409 | ||
3410 | flags = BDRV_O_RDWR; | |
3411 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
3412 | if (ret < 0) { | |
3413 | error_report("Invalid cache option: %s", cache); | |
3414 | goto out; | |
3415 | } | |
3416 | ||
3417 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); | |
3418 | if (!blk) { | |
3419 | ret = -1; | |
3420 | goto out; | |
3421 | } | |
3422 | bs = blk_bs(blk); | |
3423 | ||
3424 | fmt = bs->drv->format_name; | |
3425 | ||
3426 | if (has_help_option(options)) { | |
3427 | /* If the format was auto-detected, print option help here */ | |
3428 | ret = print_block_option_help(filename, fmt); | |
3429 | goto out; | |
3430 | } | |
3431 | ||
3432 | if (!bs->drv->create_opts) { | |
3433 | error_report("Format driver '%s' does not support any options to amend", | |
3434 | fmt); | |
3435 | ret = -1; | |
3436 | goto out; | |
3437 | } | |
3438 | ||
3439 | create_opts = qemu_opts_append(create_opts, bs->drv->create_opts); | |
3440 | opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); | |
3441 | if (options) { | |
3442 | qemu_opts_do_parse(opts, options, NULL, &err); | |
3443 | if (err) { | |
3444 | error_report_err(err); | |
3445 | ret = -1; | |
3446 | goto out; | |
3447 | } | |
3448 | } | |
3449 | ||
3450 | /* In case the driver does not call amend_status_cb() */ | |
3451 | qemu_progress_print(0.f, 0); | |
3452 | ret = bdrv_amend_options(bs, opts, &amend_status_cb, NULL); | |
3453 | qemu_progress_print(100.f, 0); | |
3454 | if (ret < 0) { | |
3455 | error_report("Error while amending options: %s", strerror(-ret)); | |
3456 | goto out; | |
3457 | } | |
3458 | ||
3459 | out: | |
3460 | qemu_progress_end(); | |
3461 | ||
3462 | out_no_progress: | |
3463 | blk_unref(blk); | |
3464 | qemu_opts_del(opts); | |
3465 | qemu_opts_free(create_opts); | |
3466 | g_free(options); | |
3467 | ||
3468 | if (ret) { | |
3469 | return 1; | |
3470 | } | |
3471 | return 0; | |
3472 | } | |
3473 | ||
3474 | typedef struct BenchData { | |
3475 | BlockBackend *blk; | |
3476 | uint64_t image_size; | |
3477 | bool write; | |
3478 | int bufsize; | |
3479 | int step; | |
3480 | int nrreq; | |
3481 | int n; | |
3482 | int flush_interval; | |
3483 | bool drain_on_flush; | |
3484 | uint8_t *buf; | |
3485 | QEMUIOVector *qiov; | |
3486 | ||
3487 | int in_flight; | |
3488 | bool in_flush; | |
3489 | uint64_t offset; | |
3490 | } BenchData; | |
3491 | ||
3492 | static void bench_undrained_flush_cb(void *opaque, int ret) | |
3493 | { | |
3494 | if (ret < 0) { | |
3495 | error_report("Failed flush request: %s", strerror(-ret)); | |
3496 | exit(EXIT_FAILURE); | |
3497 | } | |
3498 | } | |
3499 | ||
3500 | static void bench_cb(void *opaque, int ret) | |
3501 | { | |
3502 | BenchData *b = opaque; | |
3503 | BlockAIOCB *acb; | |
3504 | ||
3505 | if (ret < 0) { | |
3506 | error_report("Failed request: %s", strerror(-ret)); | |
3507 | exit(EXIT_FAILURE); | |
3508 | } | |
3509 | ||
3510 | if (b->in_flush) { | |
3511 | /* Just finished a flush with drained queue: Start next requests */ | |
3512 | assert(b->in_flight == 0); | |
3513 | b->in_flush = false; | |
3514 | } else if (b->in_flight > 0) { | |
3515 | int remaining = b->n - b->in_flight; | |
3516 | ||
3517 | b->n--; | |
3518 | b->in_flight--; | |
3519 | ||
3520 | /* Time for flush? Drain queue if requested, then flush */ | |
3521 | if (b->flush_interval && remaining % b->flush_interval == 0) { | |
3522 | if (!b->in_flight || !b->drain_on_flush) { | |
3523 | BlockCompletionFunc *cb; | |
3524 | ||
3525 | if (b->drain_on_flush) { | |
3526 | b->in_flush = true; | |
3527 | cb = bench_cb; | |
3528 | } else { | |
3529 | cb = bench_undrained_flush_cb; | |
3530 | } | |
3531 | ||
3532 | acb = blk_aio_flush(b->blk, cb, b); | |
3533 | if (!acb) { | |
3534 | error_report("Failed to issue flush request"); | |
3535 | exit(EXIT_FAILURE); | |
3536 | } | |
3537 | } | |
3538 | if (b->drain_on_flush) { | |
3539 | return; | |
3540 | } | |
3541 | } | |
3542 | } | |
3543 | ||
3544 | while (b->n > b->in_flight && b->in_flight < b->nrreq) { | |
3545 | if (b->write) { | |
3546 | acb = blk_aio_pwritev(b->blk, b->offset, b->qiov, 0, | |
3547 | bench_cb, b); | |
3548 | } else { | |
3549 | acb = blk_aio_preadv(b->blk, b->offset, b->qiov, 0, | |
3550 | bench_cb, b); | |
3551 | } | |
3552 | if (!acb) { | |
3553 | error_report("Failed to issue request"); | |
3554 | exit(EXIT_FAILURE); | |
3555 | } | |
3556 | b->in_flight++; | |
3557 | b->offset += b->step; | |
3558 | b->offset %= b->image_size; | |
3559 | } | |
3560 | } | |
3561 | ||
3562 | static int img_bench(int argc, char **argv) | |
3563 | { | |
3564 | int c, ret = 0; | |
3565 | const char *fmt = NULL, *filename; | |
3566 | bool quiet = false; | |
3567 | bool image_opts = false; | |
3568 | bool is_write = false; | |
3569 | int count = 75000; | |
3570 | int depth = 64; | |
3571 | int64_t offset = 0; | |
3572 | size_t bufsize = 4096; | |
3573 | int pattern = 0; | |
3574 | size_t step = 0; | |
3575 | int flush_interval = 0; | |
3576 | bool drain_on_flush = true; | |
3577 | int64_t image_size; | |
3578 | BlockBackend *blk = NULL; | |
3579 | BenchData data = {}; | |
3580 | int flags = 0; | |
3581 | bool writethrough = false; | |
3582 | struct timeval t1, t2; | |
3583 | int i; | |
3584 | ||
3585 | for (;;) { | |
3586 | static const struct option long_options[] = { | |
3587 | {"help", no_argument, 0, 'h'}, | |
3588 | {"flush-interval", required_argument, 0, OPTION_FLUSH_INTERVAL}, | |
3589 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3590 | {"pattern", required_argument, 0, OPTION_PATTERN}, | |
3591 | {"no-drain", no_argument, 0, OPTION_NO_DRAIN}, | |
3592 | {0, 0, 0, 0} | |
3593 | }; | |
3594 | c = getopt_long(argc, argv, "hc:d:f:no:qs:S:t:w", long_options, NULL); | |
3595 | if (c == -1) { | |
3596 | break; | |
3597 | } | |
3598 | ||
3599 | switch (c) { | |
3600 | case 'h': | |
3601 | case '?': | |
3602 | help(); | |
3603 | break; | |
3604 | case 'c': | |
3605 | { | |
3606 | char *end; | |
3607 | errno = 0; | |
3608 | count = strtoul(optarg, &end, 0); | |
3609 | if (errno || *end || count > INT_MAX) { | |
3610 | error_report("Invalid request count specified"); | |
3611 | return 1; | |
3612 | } | |
3613 | break; | |
3614 | } | |
3615 | case 'd': | |
3616 | { | |
3617 | char *end; | |
3618 | errno = 0; | |
3619 | depth = strtoul(optarg, &end, 0); | |
3620 | if (errno || *end || depth > INT_MAX) { | |
3621 | error_report("Invalid queue depth specified"); | |
3622 | return 1; | |
3623 | } | |
3624 | break; | |
3625 | } | |
3626 | case 'f': | |
3627 | fmt = optarg; | |
3628 | break; | |
3629 | case 'n': | |
3630 | flags |= BDRV_O_NATIVE_AIO; | |
3631 | break; | |
3632 | case 'o': | |
3633 | { | |
3634 | char *end; | |
3635 | errno = 0; | |
3636 | offset = qemu_strtosz_suffix(optarg, &end, | |
3637 | QEMU_STRTOSZ_DEFSUFFIX_B); | |
3638 | if (offset < 0|| *end) { | |
3639 | error_report("Invalid offset specified"); | |
3640 | return 1; | |
3641 | } | |
3642 | break; | |
3643 | } | |
3644 | break; | |
3645 | case 'q': | |
3646 | quiet = true; | |
3647 | break; | |
3648 | case 's': | |
3649 | { | |
3650 | int64_t sval; | |
3651 | char *end; | |
3652 | ||
3653 | sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); | |
3654 | if (sval < 0 || sval > INT_MAX || *end) { | |
3655 | error_report("Invalid buffer size specified"); | |
3656 | return 1; | |
3657 | } | |
3658 | ||
3659 | bufsize = sval; | |
3660 | break; | |
3661 | } | |
3662 | case 'S': | |
3663 | { | |
3664 | int64_t sval; | |
3665 | char *end; | |
3666 | ||
3667 | sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); | |
3668 | if (sval < 0 || sval > INT_MAX || *end) { | |
3669 | error_report("Invalid step size specified"); | |
3670 | return 1; | |
3671 | } | |
3672 | ||
3673 | step = sval; | |
3674 | break; | |
3675 | } | |
3676 | case 't': | |
3677 | ret = bdrv_parse_cache_mode(optarg, &flags, &writethrough); | |
3678 | if (ret < 0) { | |
3679 | error_report("Invalid cache mode"); | |
3680 | ret = -1; | |
3681 | goto out; | |
3682 | } | |
3683 | break; | |
3684 | case 'w': | |
3685 | flags |= BDRV_O_RDWR; | |
3686 | is_write = true; | |
3687 | break; | |
3688 | case OPTION_PATTERN: | |
3689 | { | |
3690 | char *end; | |
3691 | errno = 0; | |
3692 | pattern = strtoul(optarg, &end, 0); | |
3693 | if (errno || *end || pattern > 0xff) { | |
3694 | error_report("Invalid pattern byte specified"); | |
3695 | return 1; | |
3696 | } | |
3697 | break; | |
3698 | } | |
3699 | case OPTION_FLUSH_INTERVAL: | |
3700 | { | |
3701 | char *end; | |
3702 | errno = 0; | |
3703 | flush_interval = strtoul(optarg, &end, 0); | |
3704 | if (errno || *end || flush_interval > INT_MAX) { | |
3705 | error_report("Invalid flush interval specified"); | |
3706 | return 1; | |
3707 | } | |
3708 | break; | |
3709 | } | |
3710 | case OPTION_NO_DRAIN: | |
3711 | drain_on_flush = false; | |
3712 | break; | |
3713 | case OPTION_IMAGE_OPTS: | |
3714 | image_opts = true; | |
3715 | break; | |
3716 | } | |
3717 | } | |
3718 | ||
3719 | if (optind != argc - 1) { | |
3720 | error_exit("Expecting one image file name"); | |
3721 | } | |
3722 | filename = argv[argc - 1]; | |
3723 | ||
3724 | if (!is_write && flush_interval) { | |
3725 | error_report("--flush-interval is only available in write tests"); | |
3726 | ret = -1; | |
3727 | goto out; | |
3728 | } | |
3729 | if (flush_interval && flush_interval < depth) { | |
3730 | error_report("Flush interval can't be smaller than depth"); | |
3731 | ret = -1; | |
3732 | goto out; | |
3733 | } | |
3734 | ||
3735 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); | |
3736 | if (!blk) { | |
3737 | ret = -1; | |
3738 | goto out; | |
3739 | } | |
3740 | ||
3741 | image_size = blk_getlength(blk); | |
3742 | if (image_size < 0) { | |
3743 | ret = image_size; | |
3744 | goto out; | |
3745 | } | |
3746 | ||
3747 | data = (BenchData) { | |
3748 | .blk = blk, | |
3749 | .image_size = image_size, | |
3750 | .bufsize = bufsize, | |
3751 | .step = step ?: bufsize, | |
3752 | .nrreq = depth, | |
3753 | .n = count, | |
3754 | .offset = offset, | |
3755 | .write = is_write, | |
3756 | .flush_interval = flush_interval, | |
3757 | .drain_on_flush = drain_on_flush, | |
3758 | }; | |
3759 | printf("Sending %d %s requests, %d bytes each, %d in parallel " | |
3760 | "(starting at offset %" PRId64 ", step size %d)\n", | |
3761 | data.n, data.write ? "write" : "read", data.bufsize, data.nrreq, | |
3762 | data.offset, data.step); | |
3763 | if (flush_interval) { | |
3764 | printf("Sending flush every %d requests\n", flush_interval); | |
3765 | } | |
3766 | ||
3767 | data.buf = blk_blockalign(blk, data.nrreq * data.bufsize); | |
3768 | memset(data.buf, pattern, data.nrreq * data.bufsize); | |
3769 | ||
3770 | data.qiov = g_new(QEMUIOVector, data.nrreq); | |
3771 | for (i = 0; i < data.nrreq; i++) { | |
3772 | qemu_iovec_init(&data.qiov[i], 1); | |
3773 | qemu_iovec_add(&data.qiov[i], | |
3774 | data.buf + i * data.bufsize, data.bufsize); | |
3775 | } | |
3776 | ||
3777 | gettimeofday(&t1, NULL); | |
3778 | bench_cb(&data, 0); | |
3779 | ||
3780 | while (data.n > 0) { | |
3781 | main_loop_wait(false); | |
3782 | } | |
3783 | gettimeofday(&t2, NULL); | |
3784 | ||
3785 | printf("Run completed in %3.3f seconds.\n", | |
3786 | (t2.tv_sec - t1.tv_sec) | |
3787 | + ((double)(t2.tv_usec - t1.tv_usec) / 1000000)); | |
3788 | ||
3789 | out: | |
3790 | qemu_vfree(data.buf); | |
3791 | blk_unref(blk); | |
3792 | ||
3793 | if (ret) { | |
3794 | return 1; | |
3795 | } | |
3796 | return 0; | |
3797 | } | |
3798 | ||
3799 | ||
3800 | static const img_cmd_t img_cmds[] = { | |
3801 | #define DEF(option, callback, arg_string) \ | |
3802 | { option, callback }, | |
3803 | #include "qemu-img-cmds.h" | |
3804 | #undef DEF | |
3805 | #undef GEN_DOCS | |
3806 | { NULL, NULL, }, | |
3807 | }; | |
3808 | ||
3809 | int main(int argc, char **argv) | |
3810 | { | |
3811 | const img_cmd_t *cmd; | |
3812 | const char *cmdname; | |
3813 | Error *local_error = NULL; | |
3814 | char *trace_file = NULL; | |
3815 | int c; | |
3816 | static const struct option long_options[] = { | |
3817 | {"help", no_argument, 0, 'h'}, | |
3818 | {"version", no_argument, 0, 'V'}, | |
3819 | {"trace", required_argument, NULL, 'T'}, | |
3820 | {0, 0, 0, 0} | |
3821 | }; | |
3822 | ||
3823 | #ifdef CONFIG_POSIX | |
3824 | signal(SIGPIPE, SIG_IGN); | |
3825 | #endif | |
3826 | ||
3827 | error_set_progname(argv[0]); | |
3828 | qemu_init_exec_dir(argv[0]); | |
3829 | ||
3830 | if (qemu_init_main_loop(&local_error)) { | |
3831 | error_report_err(local_error); | |
3832 | exit(EXIT_FAILURE); | |
3833 | } | |
3834 | ||
3835 | qcrypto_init(&error_fatal); | |
3836 | ||
3837 | module_call_init(MODULE_INIT_QOM); | |
3838 | bdrv_init(); | |
3839 | if (argc < 2) { | |
3840 | error_exit("Not enough arguments"); | |
3841 | } | |
3842 | ||
3843 | qemu_add_opts(&qemu_object_opts); | |
3844 | qemu_add_opts(&qemu_source_opts); | |
3845 | qemu_add_opts(&qemu_trace_opts); | |
3846 | ||
3847 | while ((c = getopt_long(argc, argv, "+hVT:", long_options, NULL)) != -1) { | |
3848 | switch (c) { | |
3849 | case 'h': | |
3850 | help(); | |
3851 | return 0; | |
3852 | case 'V': | |
3853 | printf(QEMU_IMG_VERSION); | |
3854 | return 0; | |
3855 | case 'T': | |
3856 | g_free(trace_file); | |
3857 | trace_file = trace_opt_parse(optarg); | |
3858 | break; | |
3859 | } | |
3860 | } | |
3861 | ||
3862 | cmdname = argv[optind]; | |
3863 | ||
3864 | /* reset getopt_long scanning */ | |
3865 | argc -= optind; | |
3866 | if (argc < 1) { | |
3867 | return 0; | |
3868 | } | |
3869 | argv += optind; | |
3870 | optind = 0; | |
3871 | ||
3872 | if (!trace_init_backends()) { | |
3873 | exit(1); | |
3874 | } | |
3875 | trace_init_file(trace_file); | |
3876 | qemu_set_log(LOG_TRACE); | |
3877 | ||
3878 | /* find the command */ | |
3879 | for (cmd = img_cmds; cmd->name != NULL; cmd++) { | |
3880 | if (!strcmp(cmdname, cmd->name)) { | |
3881 | return cmd->handler(argc, argv); | |
3882 | } | |
3883 | } | |
3884 | ||
3885 | /* not found */ | |
3886 | error_exit("Command not found: %s", cmdname); | |
3887 | } |