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1 | /* | |
2 | * QEMU disk image utility | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | ||
25 | #include "qemu/osdep.h" | |
26 | #include <getopt.h> | |
27 | ||
28 | #include "qemu/help-texts.h" | |
29 | #include "qemu/qemu-progress.h" | |
30 | #include "qemu-version.h" | |
31 | #include "qapi/error.h" | |
32 | #include "qapi/qapi-commands-block-core.h" | |
33 | #include "qapi/qapi-visit-block-core.h" | |
34 | #include "qapi/qobject-output-visitor.h" | |
35 | #include "qapi/qmp/qjson.h" | |
36 | #include "qapi/qmp/qdict.h" | |
37 | #include "qemu/cutils.h" | |
38 | #include "qemu/config-file.h" | |
39 | #include "qemu/option.h" | |
40 | #include "qemu/error-report.h" | |
41 | #include "qemu/log.h" | |
42 | #include "qemu/main-loop.h" | |
43 | #include "qemu/module.h" | |
44 | #include "qemu/sockets.h" | |
45 | #include "qemu/units.h" | |
46 | #include "qemu/memalign.h" | |
47 | #include "qom/object_interfaces.h" | |
48 | #include "sysemu/block-backend.h" | |
49 | #include "block/block_int.h" | |
50 | #include "block/blockjob.h" | |
51 | #include "block/dirty-bitmap.h" | |
52 | #include "block/qapi.h" | |
53 | #include "crypto/init.h" | |
54 | #include "trace/control.h" | |
55 | #include "qemu/throttle.h" | |
56 | #include "block/throttle-groups.h" | |
57 | ||
58 | #define QEMU_IMG_VERSION "qemu-img version " QEMU_FULL_VERSION \ | |
59 | "\n" QEMU_COPYRIGHT "\n" | |
60 | ||
61 | typedef struct img_cmd_t { | |
62 | const char *name; | |
63 | int (*handler)(int argc, char **argv); | |
64 | } img_cmd_t; | |
65 | ||
66 | enum { | |
67 | OPTION_OUTPUT = 256, | |
68 | OPTION_BACKING_CHAIN = 257, | |
69 | OPTION_OBJECT = 258, | |
70 | OPTION_IMAGE_OPTS = 259, | |
71 | OPTION_PATTERN = 260, | |
72 | OPTION_FLUSH_INTERVAL = 261, | |
73 | OPTION_NO_DRAIN = 262, | |
74 | OPTION_TARGET_IMAGE_OPTS = 263, | |
75 | OPTION_SIZE = 264, | |
76 | OPTION_PREALLOCATION = 265, | |
77 | OPTION_SHRINK = 266, | |
78 | OPTION_SALVAGE = 267, | |
79 | OPTION_TARGET_IS_ZERO = 268, | |
80 | OPTION_ADD = 269, | |
81 | OPTION_REMOVE = 270, | |
82 | OPTION_CLEAR = 271, | |
83 | OPTION_ENABLE = 272, | |
84 | OPTION_DISABLE = 273, | |
85 | OPTION_MERGE = 274, | |
86 | OPTION_BITMAPS = 275, | |
87 | OPTION_FORCE = 276, | |
88 | OPTION_SKIP_BROKEN = 277, | |
89 | }; | |
90 | ||
91 | typedef enum OutputFormat { | |
92 | OFORMAT_JSON, | |
93 | OFORMAT_HUMAN, | |
94 | } OutputFormat; | |
95 | ||
96 | /* Default to cache=writeback as data integrity is not important for qemu-img */ | |
97 | #define BDRV_DEFAULT_CACHE "writeback" | |
98 | ||
99 | static void format_print(void *opaque, const char *name) | |
100 | { | |
101 | printf(" %s", name); | |
102 | } | |
103 | ||
104 | static G_NORETURN G_GNUC_PRINTF(1, 2) | |
105 | void error_exit(const char *fmt, ...) | |
106 | { | |
107 | va_list ap; | |
108 | ||
109 | va_start(ap, fmt); | |
110 | error_vreport(fmt, ap); | |
111 | va_end(ap); | |
112 | ||
113 | error_printf("Try 'qemu-img --help' for more information\n"); | |
114 | exit(EXIT_FAILURE); | |
115 | } | |
116 | ||
117 | static G_NORETURN | |
118 | void missing_argument(const char *option) | |
119 | { | |
120 | error_exit("missing argument for option '%s'", option); | |
121 | } | |
122 | ||
123 | static G_NORETURN | |
124 | void unrecognized_option(const char *option) | |
125 | { | |
126 | error_exit("unrecognized option '%s'", option); | |
127 | } | |
128 | ||
129 | /* Please keep in synch with docs/tools/qemu-img.rst */ | |
130 | static G_NORETURN | |
131 | void help(void) | |
132 | { | |
133 | const char *help_msg = | |
134 | QEMU_IMG_VERSION | |
135 | "usage: qemu-img [standard options] command [command options]\n" | |
136 | "QEMU disk image utility\n" | |
137 | "\n" | |
138 | " '-h', '--help' display this help and exit\n" | |
139 | " '-V', '--version' output version information and exit\n" | |
140 | " '-T', '--trace' [[enable=]<pattern>][,events=<file>][,file=<file>]\n" | |
141 | " specify tracing options\n" | |
142 | "\n" | |
143 | "Command syntax:\n" | |
144 | #define DEF(option, callback, arg_string) \ | |
145 | " " arg_string "\n" | |
146 | #include "qemu-img-cmds.h" | |
147 | #undef DEF | |
148 | "\n" | |
149 | "Command parameters:\n" | |
150 | " 'filename' is a disk image filename\n" | |
151 | " 'objectdef' is a QEMU user creatable object definition. See the qemu(1)\n" | |
152 | " manual page for a description of the object properties. The most common\n" | |
153 | " object type is a 'secret', which is used to supply passwords and/or\n" | |
154 | " encryption keys.\n" | |
155 | " 'fmt' is the disk image format. It is guessed automatically in most cases\n" | |
156 | " 'cache' is the cache mode used to write the output disk image, the valid\n" | |
157 | " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n" | |
158 | " 'directsync' and 'unsafe' (default for convert)\n" | |
159 | " 'src_cache' is the cache mode used to read input disk images, the valid\n" | |
160 | " options are the same as for the 'cache' option\n" | |
161 | " 'size' is the disk image size in bytes. Optional suffixes\n" | |
162 | " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n" | |
163 | " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n" | |
164 | " supported. 'b' is ignored.\n" | |
165 | " 'output_filename' is the destination disk image filename\n" | |
166 | " 'output_fmt' is the destination format\n" | |
167 | " 'options' is a comma separated list of format specific options in a\n" | |
168 | " name=value format. Use -o help for an overview of the options supported by\n" | |
169 | " the used format\n" | |
170 | " 'snapshot_param' is param used for internal snapshot, format\n" | |
171 | " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" | |
172 | " '[ID_OR_NAME]'\n" | |
173 | " '-c' indicates that target image must be compressed (qcow format only)\n" | |
174 | " '-u' allows unsafe backing chains. For rebasing, it is assumed that old and\n" | |
175 | " new backing file match exactly. The image doesn't need a working\n" | |
176 | " backing file before rebasing in this case (useful for renaming the\n" | |
177 | " backing file). For image creation, allow creating without attempting\n" | |
178 | " to open the backing file.\n" | |
179 | " '-h' with or without a command shows this help and lists the supported formats\n" | |
180 | " '-p' show progress of command (only certain commands)\n" | |
181 | " '-q' use Quiet mode - do not print any output (except errors)\n" | |
182 | " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n" | |
183 | " contain only zeros for qemu-img to create a sparse image during\n" | |
184 | " conversion. If the number of bytes is 0, the source will not be scanned for\n" | |
185 | " unallocated or zero sectors, and the destination image will always be\n" | |
186 | " fully allocated\n" | |
187 | " '--output' takes the format in which the output must be done (human or json)\n" | |
188 | " '-n' skips the target volume creation (useful if the volume is created\n" | |
189 | " prior to running qemu-img)\n" | |
190 | "\n" | |
191 | "Parameters to bitmap subcommand:\n" | |
192 | " 'bitmap' is the name of the bitmap to manipulate, through one or more\n" | |
193 | " actions from '--add', '--remove', '--clear', '--enable', '--disable',\n" | |
194 | " or '--merge source'\n" | |
195 | " '-g granularity' sets the granularity for '--add' actions\n" | |
196 | " '-b source' and '-F src_fmt' tell '--merge' actions to find the source\n" | |
197 | " bitmaps from an alternative file\n" | |
198 | "\n" | |
199 | "Parameters to check subcommand:\n" | |
200 | " '-r' tries to repair any inconsistencies that are found during the check.\n" | |
201 | " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n" | |
202 | " kinds of errors, with a higher risk of choosing the wrong fix or\n" | |
203 | " hiding corruption that has already occurred.\n" | |
204 | "\n" | |
205 | "Parameters to convert subcommand:\n" | |
206 | " '--bitmaps' copies all top-level persistent bitmaps to destination\n" | |
207 | " '-m' specifies how many coroutines work in parallel during the convert\n" | |
208 | " process (defaults to 8)\n" | |
209 | " '-W' allow to write to the target out of order rather than sequential\n" | |
210 | "\n" | |
211 | "Parameters to snapshot subcommand:\n" | |
212 | " 'snapshot' is the name of the snapshot to create, apply or delete\n" | |
213 | " '-a' applies a snapshot (revert disk to saved state)\n" | |
214 | " '-c' creates a snapshot\n" | |
215 | " '-d' deletes a snapshot\n" | |
216 | " '-l' lists all snapshots in the given image\n" | |
217 | "\n" | |
218 | "Parameters to compare subcommand:\n" | |
219 | " '-f' first image format\n" | |
220 | " '-F' second image format\n" | |
221 | " '-s' run in Strict mode - fail on different image size or sector allocation\n" | |
222 | "\n" | |
223 | "Parameters to dd subcommand:\n" | |
224 | " 'bs=BYTES' read and write up to BYTES bytes at a time " | |
225 | "(default: 512)\n" | |
226 | " 'count=N' copy only N input blocks\n" | |
227 | " 'if=FILE' read from FILE\n" | |
228 | " 'of=FILE' write to FILE\n" | |
229 | " 'skip=N' skip N bs-sized blocks at the start of input\n"; | |
230 | ||
231 | printf("%s\nSupported formats:", help_msg); | |
232 | bdrv_iterate_format(format_print, NULL, false); | |
233 | printf("\n\n" QEMU_HELP_BOTTOM "\n"); | |
234 | exit(EXIT_SUCCESS); | |
235 | } | |
236 | ||
237 | /* | |
238 | * Is @list safe for accumulate_options()? | |
239 | * It is when multiple of them can be joined together separated by ','. | |
240 | * To make that work, @list must not start with ',' (or else a | |
241 | * separating ',' preceding it gets escaped), and it must not end with | |
242 | * an odd number of ',' (or else a separating ',' following it gets | |
243 | * escaped), or be empty (or else a separating ',' preceding it can | |
244 | * escape a separating ',' following it). | |
245 | * | |
246 | */ | |
247 | static bool is_valid_option_list(const char *list) | |
248 | { | |
249 | size_t len = strlen(list); | |
250 | size_t i; | |
251 | ||
252 | if (!list[0] || list[0] == ',') { | |
253 | return false; | |
254 | } | |
255 | ||
256 | for (i = len; i > 0 && list[i - 1] == ','; i--) { | |
257 | } | |
258 | if ((len - i) % 2) { | |
259 | return false; | |
260 | } | |
261 | ||
262 | return true; | |
263 | } | |
264 | ||
265 | static int accumulate_options(char **options, char *list) | |
266 | { | |
267 | char *new_options; | |
268 | ||
269 | if (!is_valid_option_list(list)) { | |
270 | error_report("Invalid option list: %s", list); | |
271 | return -1; | |
272 | } | |
273 | ||
274 | if (!*options) { | |
275 | *options = g_strdup(list); | |
276 | } else { | |
277 | new_options = g_strdup_printf("%s,%s", *options, list); | |
278 | g_free(*options); | |
279 | *options = new_options; | |
280 | } | |
281 | return 0; | |
282 | } | |
283 | ||
284 | static QemuOptsList qemu_source_opts = { | |
285 | .name = "source", | |
286 | .implied_opt_name = "file", | |
287 | .head = QTAILQ_HEAD_INITIALIZER(qemu_source_opts.head), | |
288 | .desc = { | |
289 | { } | |
290 | }, | |
291 | }; | |
292 | ||
293 | static int G_GNUC_PRINTF(2, 3) qprintf(bool quiet, const char *fmt, ...) | |
294 | { | |
295 | int ret = 0; | |
296 | if (!quiet) { | |
297 | va_list args; | |
298 | va_start(args, fmt); | |
299 | ret = vprintf(fmt, args); | |
300 | va_end(args); | |
301 | } | |
302 | return ret; | |
303 | } | |
304 | ||
305 | ||
306 | static int print_block_option_help(const char *filename, const char *fmt) | |
307 | { | |
308 | BlockDriver *drv, *proto_drv; | |
309 | QemuOptsList *create_opts = NULL; | |
310 | Error *local_err = NULL; | |
311 | ||
312 | /* Find driver and parse its options */ | |
313 | drv = bdrv_find_format(fmt); | |
314 | if (!drv) { | |
315 | error_report("Unknown file format '%s'", fmt); | |
316 | return 1; | |
317 | } | |
318 | ||
319 | if (!drv->create_opts) { | |
320 | error_report("Format driver '%s' does not support image creation", fmt); | |
321 | return 1; | |
322 | } | |
323 | ||
324 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
325 | if (filename) { | |
326 | proto_drv = bdrv_find_protocol(filename, true, &local_err); | |
327 | if (!proto_drv) { | |
328 | error_report_err(local_err); | |
329 | qemu_opts_free(create_opts); | |
330 | return 1; | |
331 | } | |
332 | if (!proto_drv->create_opts) { | |
333 | error_report("Protocol driver '%s' does not support image creation", | |
334 | proto_drv->format_name); | |
335 | qemu_opts_free(create_opts); | |
336 | return 1; | |
337 | } | |
338 | create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); | |
339 | } | |
340 | ||
341 | if (filename) { | |
342 | printf("Supported options:\n"); | |
343 | } else { | |
344 | printf("Supported %s options:\n", fmt); | |
345 | } | |
346 | qemu_opts_print_help(create_opts, false); | |
347 | qemu_opts_free(create_opts); | |
348 | ||
349 | if (!filename) { | |
350 | printf("\n" | |
351 | "The protocol level may support further options.\n" | |
352 | "Specify the target filename to include those options.\n"); | |
353 | } | |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
358 | ||
359 | static BlockBackend *img_open_opts(const char *optstr, | |
360 | QemuOpts *opts, int flags, bool writethrough, | |
361 | bool quiet, bool force_share) | |
362 | { | |
363 | QDict *options; | |
364 | Error *local_err = NULL; | |
365 | BlockBackend *blk; | |
366 | options = qemu_opts_to_qdict(opts, NULL); | |
367 | if (force_share) { | |
368 | if (qdict_haskey(options, BDRV_OPT_FORCE_SHARE) | |
369 | && strcmp(qdict_get_str(options, BDRV_OPT_FORCE_SHARE), "on")) { | |
370 | error_report("--force-share/-U conflicts with image options"); | |
371 | qobject_unref(options); | |
372 | return NULL; | |
373 | } | |
374 | qdict_put_str(options, BDRV_OPT_FORCE_SHARE, "on"); | |
375 | } | |
376 | blk = blk_new_open(NULL, NULL, options, flags, &local_err); | |
377 | if (!blk) { | |
378 | error_reportf_err(local_err, "Could not open '%s': ", optstr); | |
379 | return NULL; | |
380 | } | |
381 | blk_set_enable_write_cache(blk, !writethrough); | |
382 | ||
383 | return blk; | |
384 | } | |
385 | ||
386 | static BlockBackend *img_open_file(const char *filename, | |
387 | QDict *options, | |
388 | const char *fmt, int flags, | |
389 | bool writethrough, bool quiet, | |
390 | bool force_share) | |
391 | { | |
392 | BlockBackend *blk; | |
393 | Error *local_err = NULL; | |
394 | ||
395 | if (!options) { | |
396 | options = qdict_new(); | |
397 | } | |
398 | if (fmt) { | |
399 | qdict_put_str(options, "driver", fmt); | |
400 | } | |
401 | ||
402 | if (force_share) { | |
403 | qdict_put_bool(options, BDRV_OPT_FORCE_SHARE, true); | |
404 | } | |
405 | blk = blk_new_open(filename, NULL, options, flags, &local_err); | |
406 | if (!blk) { | |
407 | error_reportf_err(local_err, "Could not open '%s': ", filename); | |
408 | return NULL; | |
409 | } | |
410 | blk_set_enable_write_cache(blk, !writethrough); | |
411 | ||
412 | return blk; | |
413 | } | |
414 | ||
415 | ||
416 | static int img_add_key_secrets(void *opaque, | |
417 | const char *name, const char *value, | |
418 | Error **errp) | |
419 | { | |
420 | QDict *options = opaque; | |
421 | ||
422 | if (g_str_has_suffix(name, "key-secret")) { | |
423 | qdict_put_str(options, name, value); | |
424 | } | |
425 | ||
426 | return 0; | |
427 | } | |
428 | ||
429 | ||
430 | static BlockBackend *img_open(bool image_opts, | |
431 | const char *filename, | |
432 | const char *fmt, int flags, bool writethrough, | |
433 | bool quiet, bool force_share) | |
434 | { | |
435 | BlockBackend *blk; | |
436 | if (image_opts) { | |
437 | QemuOpts *opts; | |
438 | if (fmt) { | |
439 | error_report("--image-opts and --format are mutually exclusive"); | |
440 | return NULL; | |
441 | } | |
442 | opts = qemu_opts_parse_noisily(qemu_find_opts("source"), | |
443 | filename, true); | |
444 | if (!opts) { | |
445 | return NULL; | |
446 | } | |
447 | blk = img_open_opts(filename, opts, flags, writethrough, quiet, | |
448 | force_share); | |
449 | } else { | |
450 | blk = img_open_file(filename, NULL, fmt, flags, writethrough, quiet, | |
451 | force_share); | |
452 | } | |
453 | ||
454 | if (blk) { | |
455 | blk_set_force_allow_inactivate(blk); | |
456 | } | |
457 | ||
458 | return blk; | |
459 | } | |
460 | ||
461 | ||
462 | static int add_old_style_options(const char *fmt, QemuOpts *opts, | |
463 | const char *base_filename, | |
464 | const char *base_fmt) | |
465 | { | |
466 | if (base_filename) { | |
467 | if (!qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, | |
468 | NULL)) { | |
469 | error_report("Backing file not supported for file format '%s'", | |
470 | fmt); | |
471 | return -1; | |
472 | } | |
473 | } | |
474 | if (base_fmt) { | |
475 | if (!qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, NULL)) { | |
476 | error_report("Backing file format not supported for file " | |
477 | "format '%s'", fmt); | |
478 | return -1; | |
479 | } | |
480 | } | |
481 | return 0; | |
482 | } | |
483 | ||
484 | static int64_t cvtnum_full(const char *name, const char *value, int64_t min, | |
485 | int64_t max) | |
486 | { | |
487 | int err; | |
488 | uint64_t res; | |
489 | ||
490 | err = qemu_strtosz(value, NULL, &res); | |
491 | if (err < 0 && err != -ERANGE) { | |
492 | error_report("Invalid %s specified. You may use " | |
493 | "k, M, G, T, P or E suffixes for", name); | |
494 | error_report("kilobytes, megabytes, gigabytes, terabytes, " | |
495 | "petabytes and exabytes."); | |
496 | return err; | |
497 | } | |
498 | if (err == -ERANGE || res > max || res < min) { | |
499 | error_report("Invalid %s specified. Must be between %" PRId64 | |
500 | " and %" PRId64 ".", name, min, max); | |
501 | return -ERANGE; | |
502 | } | |
503 | return res; | |
504 | } | |
505 | ||
506 | static int64_t cvtnum(const char *name, const char *value) | |
507 | { | |
508 | return cvtnum_full(name, value, 0, INT64_MAX); | |
509 | } | |
510 | ||
511 | static int img_create(int argc, char **argv) | |
512 | { | |
513 | int c; | |
514 | uint64_t img_size = -1; | |
515 | const char *fmt = "raw"; | |
516 | const char *base_fmt = NULL; | |
517 | const char *filename; | |
518 | const char *base_filename = NULL; | |
519 | char *options = NULL; | |
520 | Error *local_err = NULL; | |
521 | bool quiet = false; | |
522 | int flags = 0; | |
523 | ||
524 | for(;;) { | |
525 | static const struct option long_options[] = { | |
526 | {"help", no_argument, 0, 'h'}, | |
527 | {"object", required_argument, 0, OPTION_OBJECT}, | |
528 | {0, 0, 0, 0} | |
529 | }; | |
530 | c = getopt_long(argc, argv, ":F:b:f:ho:qu", | |
531 | long_options, NULL); | |
532 | if (c == -1) { | |
533 | break; | |
534 | } | |
535 | switch(c) { | |
536 | case ':': | |
537 | missing_argument(argv[optind - 1]); | |
538 | break; | |
539 | case '?': | |
540 | unrecognized_option(argv[optind - 1]); | |
541 | break; | |
542 | case 'h': | |
543 | help(); | |
544 | break; | |
545 | case 'F': | |
546 | base_fmt = optarg; | |
547 | break; | |
548 | case 'b': | |
549 | base_filename = optarg; | |
550 | break; | |
551 | case 'f': | |
552 | fmt = optarg; | |
553 | break; | |
554 | case 'o': | |
555 | if (accumulate_options(&options, optarg) < 0) { | |
556 | goto fail; | |
557 | } | |
558 | break; | |
559 | case 'q': | |
560 | quiet = true; | |
561 | break; | |
562 | case 'u': | |
563 | flags |= BDRV_O_NO_BACKING; | |
564 | break; | |
565 | case OPTION_OBJECT: | |
566 | user_creatable_process_cmdline(optarg); | |
567 | break; | |
568 | } | |
569 | } | |
570 | ||
571 | /* Get the filename */ | |
572 | filename = (optind < argc) ? argv[optind] : NULL; | |
573 | if (options && has_help_option(options)) { | |
574 | g_free(options); | |
575 | return print_block_option_help(filename, fmt); | |
576 | } | |
577 | ||
578 | if (optind >= argc) { | |
579 | error_exit("Expecting image file name"); | |
580 | } | |
581 | optind++; | |
582 | ||
583 | /* Get image size, if specified */ | |
584 | if (optind < argc) { | |
585 | int64_t sval; | |
586 | ||
587 | sval = cvtnum("image size", argv[optind++]); | |
588 | if (sval < 0) { | |
589 | goto fail; | |
590 | } | |
591 | img_size = (uint64_t)sval; | |
592 | } | |
593 | if (optind != argc) { | |
594 | error_exit("Unexpected argument: %s", argv[optind]); | |
595 | } | |
596 | ||
597 | bdrv_img_create(filename, fmt, base_filename, base_fmt, | |
598 | options, img_size, flags, quiet, &local_err); | |
599 | if (local_err) { | |
600 | error_reportf_err(local_err, "%s: ", filename); | |
601 | goto fail; | |
602 | } | |
603 | ||
604 | g_free(options); | |
605 | return 0; | |
606 | ||
607 | fail: | |
608 | g_free(options); | |
609 | return 1; | |
610 | } | |
611 | ||
612 | static void dump_json_image_check(ImageCheck *check, bool quiet) | |
613 | { | |
614 | GString *str; | |
615 | QObject *obj; | |
616 | Visitor *v = qobject_output_visitor_new(&obj); | |
617 | ||
618 | visit_type_ImageCheck(v, NULL, &check, &error_abort); | |
619 | visit_complete(v, &obj); | |
620 | str = qobject_to_json_pretty(obj, true); | |
621 | assert(str != NULL); | |
622 | qprintf(quiet, "%s\n", str->str); | |
623 | qobject_unref(obj); | |
624 | visit_free(v); | |
625 | g_string_free(str, true); | |
626 | } | |
627 | ||
628 | static void dump_human_image_check(ImageCheck *check, bool quiet) | |
629 | { | |
630 | if (!(check->corruptions || check->leaks || check->check_errors)) { | |
631 | qprintf(quiet, "No errors were found on the image.\n"); | |
632 | } else { | |
633 | if (check->corruptions) { | |
634 | qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n" | |
635 | "Data may be corrupted, or further writes to the image " | |
636 | "may corrupt it.\n", | |
637 | check->corruptions); | |
638 | } | |
639 | ||
640 | if (check->leaks) { | |
641 | qprintf(quiet, | |
642 | "\n%" PRId64 " leaked clusters were found on the image.\n" | |
643 | "This means waste of disk space, but no harm to data.\n", | |
644 | check->leaks); | |
645 | } | |
646 | ||
647 | if (check->check_errors) { | |
648 | qprintf(quiet, | |
649 | "\n%" PRId64 | |
650 | " internal errors have occurred during the check.\n", | |
651 | check->check_errors); | |
652 | } | |
653 | } | |
654 | ||
655 | if (check->total_clusters != 0 && check->allocated_clusters != 0) { | |
656 | qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, " | |
657 | "%0.2f%% fragmented, %0.2f%% compressed clusters\n", | |
658 | check->allocated_clusters, check->total_clusters, | |
659 | check->allocated_clusters * 100.0 / check->total_clusters, | |
660 | check->fragmented_clusters * 100.0 / check->allocated_clusters, | |
661 | check->compressed_clusters * 100.0 / | |
662 | check->allocated_clusters); | |
663 | } | |
664 | ||
665 | if (check->image_end_offset) { | |
666 | qprintf(quiet, | |
667 | "Image end offset: %" PRId64 "\n", check->image_end_offset); | |
668 | } | |
669 | } | |
670 | ||
671 | static int collect_image_check(BlockDriverState *bs, | |
672 | ImageCheck *check, | |
673 | const char *filename, | |
674 | const char *fmt, | |
675 | int fix) | |
676 | { | |
677 | int ret; | |
678 | BdrvCheckResult result; | |
679 | ||
680 | ret = bdrv_check(bs, &result, fix); | |
681 | if (ret < 0) { | |
682 | return ret; | |
683 | } | |
684 | ||
685 | check->filename = g_strdup(filename); | |
686 | check->format = g_strdup(bdrv_get_format_name(bs)); | |
687 | check->check_errors = result.check_errors; | |
688 | check->corruptions = result.corruptions; | |
689 | check->has_corruptions = result.corruptions != 0; | |
690 | check->leaks = result.leaks; | |
691 | check->has_leaks = result.leaks != 0; | |
692 | check->corruptions_fixed = result.corruptions_fixed; | |
693 | check->has_corruptions_fixed = result.corruptions_fixed != 0; | |
694 | check->leaks_fixed = result.leaks_fixed; | |
695 | check->has_leaks_fixed = result.leaks_fixed != 0; | |
696 | check->image_end_offset = result.image_end_offset; | |
697 | check->has_image_end_offset = result.image_end_offset != 0; | |
698 | check->total_clusters = result.bfi.total_clusters; | |
699 | check->has_total_clusters = result.bfi.total_clusters != 0; | |
700 | check->allocated_clusters = result.bfi.allocated_clusters; | |
701 | check->has_allocated_clusters = result.bfi.allocated_clusters != 0; | |
702 | check->fragmented_clusters = result.bfi.fragmented_clusters; | |
703 | check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0; | |
704 | check->compressed_clusters = result.bfi.compressed_clusters; | |
705 | check->has_compressed_clusters = result.bfi.compressed_clusters != 0; | |
706 | ||
707 | return 0; | |
708 | } | |
709 | ||
710 | /* | |
711 | * Checks an image for consistency. Exit codes: | |
712 | * | |
713 | * 0 - Check completed, image is good | |
714 | * 1 - Check not completed because of internal errors | |
715 | * 2 - Check completed, image is corrupted | |
716 | * 3 - Check completed, image has leaked clusters, but is good otherwise | |
717 | * 63 - Checks are not supported by the image format | |
718 | */ | |
719 | static int img_check(int argc, char **argv) | |
720 | { | |
721 | int c, ret; | |
722 | OutputFormat output_format = OFORMAT_HUMAN; | |
723 | const char *filename, *fmt, *output, *cache; | |
724 | BlockBackend *blk; | |
725 | BlockDriverState *bs; | |
726 | int fix = 0; | |
727 | int flags = BDRV_O_CHECK; | |
728 | bool writethrough; | |
729 | ImageCheck *check; | |
730 | bool quiet = false; | |
731 | bool image_opts = false; | |
732 | bool force_share = false; | |
733 | ||
734 | fmt = NULL; | |
735 | output = NULL; | |
736 | cache = BDRV_DEFAULT_CACHE; | |
737 | ||
738 | for(;;) { | |
739 | int option_index = 0; | |
740 | static const struct option long_options[] = { | |
741 | {"help", no_argument, 0, 'h'}, | |
742 | {"format", required_argument, 0, 'f'}, | |
743 | {"repair", required_argument, 0, 'r'}, | |
744 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
745 | {"object", required_argument, 0, OPTION_OBJECT}, | |
746 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
747 | {"force-share", no_argument, 0, 'U'}, | |
748 | {0, 0, 0, 0} | |
749 | }; | |
750 | c = getopt_long(argc, argv, ":hf:r:T:qU", | |
751 | long_options, &option_index); | |
752 | if (c == -1) { | |
753 | break; | |
754 | } | |
755 | switch(c) { | |
756 | case ':': | |
757 | missing_argument(argv[optind - 1]); | |
758 | break; | |
759 | case '?': | |
760 | unrecognized_option(argv[optind - 1]); | |
761 | break; | |
762 | case 'h': | |
763 | help(); | |
764 | break; | |
765 | case 'f': | |
766 | fmt = optarg; | |
767 | break; | |
768 | case 'r': | |
769 | flags |= BDRV_O_RDWR; | |
770 | ||
771 | if (!strcmp(optarg, "leaks")) { | |
772 | fix = BDRV_FIX_LEAKS; | |
773 | } else if (!strcmp(optarg, "all")) { | |
774 | fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; | |
775 | } else { | |
776 | error_exit("Unknown option value for -r " | |
777 | "(expecting 'leaks' or 'all'): %s", optarg); | |
778 | } | |
779 | break; | |
780 | case OPTION_OUTPUT: | |
781 | output = optarg; | |
782 | break; | |
783 | case 'T': | |
784 | cache = optarg; | |
785 | break; | |
786 | case 'q': | |
787 | quiet = true; | |
788 | break; | |
789 | case 'U': | |
790 | force_share = true; | |
791 | break; | |
792 | case OPTION_OBJECT: | |
793 | user_creatable_process_cmdline(optarg); | |
794 | break; | |
795 | case OPTION_IMAGE_OPTS: | |
796 | image_opts = true; | |
797 | break; | |
798 | } | |
799 | } | |
800 | if (optind != argc - 1) { | |
801 | error_exit("Expecting one image file name"); | |
802 | } | |
803 | filename = argv[optind++]; | |
804 | ||
805 | if (output && !strcmp(output, "json")) { | |
806 | output_format = OFORMAT_JSON; | |
807 | } else if (output && !strcmp(output, "human")) { | |
808 | output_format = OFORMAT_HUMAN; | |
809 | } else if (output) { | |
810 | error_report("--output must be used with human or json as argument."); | |
811 | return 1; | |
812 | } | |
813 | ||
814 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
815 | if (ret < 0) { | |
816 | error_report("Invalid source cache option: %s", cache); | |
817 | return 1; | |
818 | } | |
819 | ||
820 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, | |
821 | force_share); | |
822 | if (!blk) { | |
823 | return 1; | |
824 | } | |
825 | bs = blk_bs(blk); | |
826 | ||
827 | check = g_new0(ImageCheck, 1); | |
828 | ret = collect_image_check(bs, check, filename, fmt, fix); | |
829 | ||
830 | if (ret == -ENOTSUP) { | |
831 | error_report("This image format does not support checks"); | |
832 | ret = 63; | |
833 | goto fail; | |
834 | } | |
835 | ||
836 | if (check->corruptions_fixed || check->leaks_fixed) { | |
837 | int corruptions_fixed, leaks_fixed; | |
838 | bool has_leaks_fixed, has_corruptions_fixed; | |
839 | ||
840 | leaks_fixed = check->leaks_fixed; | |
841 | has_leaks_fixed = check->has_leaks_fixed; | |
842 | corruptions_fixed = check->corruptions_fixed; | |
843 | has_corruptions_fixed = check->has_corruptions_fixed; | |
844 | ||
845 | if (output_format == OFORMAT_HUMAN) { | |
846 | qprintf(quiet, | |
847 | "The following inconsistencies were found and repaired:\n\n" | |
848 | " %" PRId64 " leaked clusters\n" | |
849 | " %" PRId64 " corruptions\n\n" | |
850 | "Double checking the fixed image now...\n", | |
851 | check->leaks_fixed, | |
852 | check->corruptions_fixed); | |
853 | } | |
854 | ||
855 | qapi_free_ImageCheck(check); | |
856 | check = g_new0(ImageCheck, 1); | |
857 | ret = collect_image_check(bs, check, filename, fmt, 0); | |
858 | ||
859 | check->leaks_fixed = leaks_fixed; | |
860 | check->has_leaks_fixed = has_leaks_fixed; | |
861 | check->corruptions_fixed = corruptions_fixed; | |
862 | check->has_corruptions_fixed = has_corruptions_fixed; | |
863 | } | |
864 | ||
865 | if (!ret) { | |
866 | switch (output_format) { | |
867 | case OFORMAT_HUMAN: | |
868 | dump_human_image_check(check, quiet); | |
869 | break; | |
870 | case OFORMAT_JSON: | |
871 | dump_json_image_check(check, quiet); | |
872 | break; | |
873 | } | |
874 | } | |
875 | ||
876 | if (ret || check->check_errors) { | |
877 | if (ret) { | |
878 | error_report("Check failed: %s", strerror(-ret)); | |
879 | } else { | |
880 | error_report("Check failed"); | |
881 | } | |
882 | ret = 1; | |
883 | goto fail; | |
884 | } | |
885 | ||
886 | if (check->corruptions) { | |
887 | ret = 2; | |
888 | } else if (check->leaks) { | |
889 | ret = 3; | |
890 | } else { | |
891 | ret = 0; | |
892 | } | |
893 | ||
894 | fail: | |
895 | qapi_free_ImageCheck(check); | |
896 | blk_unref(blk); | |
897 | return ret; | |
898 | } | |
899 | ||
900 | typedef struct CommonBlockJobCBInfo { | |
901 | BlockDriverState *bs; | |
902 | Error **errp; | |
903 | } CommonBlockJobCBInfo; | |
904 | ||
905 | static void common_block_job_cb(void *opaque, int ret) | |
906 | { | |
907 | CommonBlockJobCBInfo *cbi = opaque; | |
908 | ||
909 | if (ret < 0) { | |
910 | error_setg_errno(cbi->errp, -ret, "Block job failed"); | |
911 | } | |
912 | } | |
913 | ||
914 | static void run_block_job(BlockJob *job, Error **errp) | |
915 | { | |
916 | uint64_t progress_current, progress_total; | |
917 | AioContext *aio_context = block_job_get_aio_context(job); | |
918 | int ret = 0; | |
919 | ||
920 | job_lock(); | |
921 | job_ref_locked(&job->job); | |
922 | do { | |
923 | float progress = 0.0f; | |
924 | job_unlock(); | |
925 | aio_poll(aio_context, true); | |
926 | ||
927 | progress_get_snapshot(&job->job.progress, &progress_current, | |
928 | &progress_total); | |
929 | if (progress_total) { | |
930 | progress = (float)progress_current / progress_total * 100.f; | |
931 | } | |
932 | qemu_progress_print(progress, 0); | |
933 | job_lock(); | |
934 | } while (!job_is_ready_locked(&job->job) && | |
935 | !job_is_completed_locked(&job->job)); | |
936 | ||
937 | if (!job_is_completed_locked(&job->job)) { | |
938 | ret = job_complete_sync_locked(&job->job, errp); | |
939 | } else { | |
940 | ret = job->job.ret; | |
941 | } | |
942 | job_unref_locked(&job->job); | |
943 | job_unlock(); | |
944 | ||
945 | /* publish completion progress only when success */ | |
946 | if (!ret) { | |
947 | qemu_progress_print(100.f, 0); | |
948 | } | |
949 | } | |
950 | ||
951 | static int img_commit(int argc, char **argv) | |
952 | { | |
953 | int c, ret, flags; | |
954 | const char *filename, *fmt, *cache, *base; | |
955 | BlockBackend *blk; | |
956 | BlockDriverState *bs, *base_bs; | |
957 | BlockJob *job; | |
958 | bool progress = false, quiet = false, drop = false; | |
959 | bool writethrough; | |
960 | Error *local_err = NULL; | |
961 | CommonBlockJobCBInfo cbi; | |
962 | bool image_opts = false; | |
963 | AioContext *aio_context; | |
964 | int64_t rate_limit = 0; | |
965 | ||
966 | fmt = NULL; | |
967 | cache = BDRV_DEFAULT_CACHE; | |
968 | base = NULL; | |
969 | for(;;) { | |
970 | static const struct option long_options[] = { | |
971 | {"help", no_argument, 0, 'h'}, | |
972 | {"object", required_argument, 0, OPTION_OBJECT}, | |
973 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
974 | {0, 0, 0, 0} | |
975 | }; | |
976 | c = getopt_long(argc, argv, ":f:ht:b:dpqr:", | |
977 | long_options, NULL); | |
978 | if (c == -1) { | |
979 | break; | |
980 | } | |
981 | switch(c) { | |
982 | case ':': | |
983 | missing_argument(argv[optind - 1]); | |
984 | break; | |
985 | case '?': | |
986 | unrecognized_option(argv[optind - 1]); | |
987 | break; | |
988 | case 'h': | |
989 | help(); | |
990 | break; | |
991 | case 'f': | |
992 | fmt = optarg; | |
993 | break; | |
994 | case 't': | |
995 | cache = optarg; | |
996 | break; | |
997 | case 'b': | |
998 | base = optarg; | |
999 | /* -b implies -d */ | |
1000 | drop = true; | |
1001 | break; | |
1002 | case 'd': | |
1003 | drop = true; | |
1004 | break; | |
1005 | case 'p': | |
1006 | progress = true; | |
1007 | break; | |
1008 | case 'q': | |
1009 | quiet = true; | |
1010 | break; | |
1011 | case 'r': | |
1012 | rate_limit = cvtnum("rate limit", optarg); | |
1013 | if (rate_limit < 0) { | |
1014 | return 1; | |
1015 | } | |
1016 | break; | |
1017 | case OPTION_OBJECT: | |
1018 | user_creatable_process_cmdline(optarg); | |
1019 | break; | |
1020 | case OPTION_IMAGE_OPTS: | |
1021 | image_opts = true; | |
1022 | break; | |
1023 | } | |
1024 | } | |
1025 | ||
1026 | /* Progress is not shown in Quiet mode */ | |
1027 | if (quiet) { | |
1028 | progress = false; | |
1029 | } | |
1030 | ||
1031 | if (optind != argc - 1) { | |
1032 | error_exit("Expecting one image file name"); | |
1033 | } | |
1034 | filename = argv[optind++]; | |
1035 | ||
1036 | flags = BDRV_O_RDWR | BDRV_O_UNMAP; | |
1037 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
1038 | if (ret < 0) { | |
1039 | error_report("Invalid cache option: %s", cache); | |
1040 | return 1; | |
1041 | } | |
1042 | ||
1043 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, | |
1044 | false); | |
1045 | if (!blk) { | |
1046 | return 1; | |
1047 | } | |
1048 | bs = blk_bs(blk); | |
1049 | ||
1050 | qemu_progress_init(progress, 1.f); | |
1051 | qemu_progress_print(0.f, 100); | |
1052 | ||
1053 | bdrv_graph_rdlock_main_loop(); | |
1054 | if (base) { | |
1055 | base_bs = bdrv_find_backing_image(bs, base); | |
1056 | if (!base_bs) { | |
1057 | error_setg(&local_err, | |
1058 | "Did not find '%s' in the backing chain of '%s'", | |
1059 | base, filename); | |
1060 | bdrv_graph_rdunlock_main_loop(); | |
1061 | goto done; | |
1062 | } | |
1063 | } else { | |
1064 | /* This is different from QMP, which by default uses the deepest file in | |
1065 | * the backing chain (i.e., the very base); however, the traditional | |
1066 | * behavior of qemu-img commit is using the immediate backing file. */ | |
1067 | base_bs = bdrv_backing_chain_next(bs); | |
1068 | if (!base_bs) { | |
1069 | error_setg(&local_err, "Image does not have a backing file"); | |
1070 | bdrv_graph_rdunlock_main_loop(); | |
1071 | goto done; | |
1072 | } | |
1073 | } | |
1074 | bdrv_graph_rdunlock_main_loop(); | |
1075 | ||
1076 | cbi = (CommonBlockJobCBInfo){ | |
1077 | .errp = &local_err, | |
1078 | .bs = bs, | |
1079 | }; | |
1080 | ||
1081 | aio_context = bdrv_get_aio_context(bs); | |
1082 | aio_context_acquire(aio_context); | |
1083 | commit_active_start("commit", bs, base_bs, JOB_DEFAULT, rate_limit, | |
1084 | BLOCKDEV_ON_ERROR_REPORT, NULL, common_block_job_cb, | |
1085 | &cbi, false, &local_err); | |
1086 | aio_context_release(aio_context); | |
1087 | if (local_err) { | |
1088 | goto done; | |
1089 | } | |
1090 | ||
1091 | /* When the block job completes, the BlockBackend reference will point to | |
1092 | * the old backing file. In order to avoid that the top image is already | |
1093 | * deleted, so we can still empty it afterwards, increment the reference | |
1094 | * counter here preemptively. */ | |
1095 | if (!drop) { | |
1096 | bdrv_ref(bs); | |
1097 | } | |
1098 | ||
1099 | job = block_job_get("commit"); | |
1100 | assert(job); | |
1101 | run_block_job(job, &local_err); | |
1102 | if (local_err) { | |
1103 | goto unref_backing; | |
1104 | } | |
1105 | ||
1106 | if (!drop) { | |
1107 | BlockBackend *old_backing_blk; | |
1108 | ||
1109 | old_backing_blk = blk_new_with_bs(bs, BLK_PERM_WRITE, BLK_PERM_ALL, | |
1110 | &local_err); | |
1111 | if (!old_backing_blk) { | |
1112 | goto unref_backing; | |
1113 | } | |
1114 | ret = blk_make_empty(old_backing_blk, &local_err); | |
1115 | blk_unref(old_backing_blk); | |
1116 | if (ret == -ENOTSUP) { | |
1117 | error_free(local_err); | |
1118 | local_err = NULL; | |
1119 | } else if (ret < 0) { | |
1120 | goto unref_backing; | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | unref_backing: | |
1125 | if (!drop) { | |
1126 | bdrv_unref(bs); | |
1127 | } | |
1128 | ||
1129 | done: | |
1130 | qemu_progress_end(); | |
1131 | ||
1132 | /* | |
1133 | * Manually inactivate the image first because this way we can know whether | |
1134 | * an error occurred. blk_unref() doesn't tell us about failures. | |
1135 | */ | |
1136 | ret = bdrv_inactivate_all(); | |
1137 | if (ret < 0 && !local_err) { | |
1138 | error_setg_errno(&local_err, -ret, "Error while closing the image"); | |
1139 | } | |
1140 | blk_unref(blk); | |
1141 | ||
1142 | if (local_err) { | |
1143 | error_report_err(local_err); | |
1144 | return 1; | |
1145 | } | |
1146 | ||
1147 | qprintf(quiet, "Image committed.\n"); | |
1148 | return 0; | |
1149 | } | |
1150 | ||
1151 | /* | |
1152 | * Returns -1 if 'buf' contains only zeroes, otherwise the byte index | |
1153 | * of the first sector boundary within buf where the sector contains a | |
1154 | * non-zero byte. This function is robust to a buffer that is not | |
1155 | * sector-aligned. | |
1156 | */ | |
1157 | static int64_t find_nonzero(const uint8_t *buf, int64_t n) | |
1158 | { | |
1159 | int64_t i; | |
1160 | int64_t end = QEMU_ALIGN_DOWN(n, BDRV_SECTOR_SIZE); | |
1161 | ||
1162 | for (i = 0; i < end; i += BDRV_SECTOR_SIZE) { | |
1163 | if (!buffer_is_zero(buf + i, BDRV_SECTOR_SIZE)) { | |
1164 | return i; | |
1165 | } | |
1166 | } | |
1167 | if (i < n && !buffer_is_zero(buf + i, n - end)) { | |
1168 | return i; | |
1169 | } | |
1170 | return -1; | |
1171 | } | |
1172 | ||
1173 | /* | |
1174 | * Returns true iff the first sector pointed to by 'buf' contains at least | |
1175 | * a non-NUL byte. | |
1176 | * | |
1177 | * 'pnum' is set to the number of sectors (including and immediately following | |
1178 | * the first one) that are known to be in the same allocated/unallocated state. | |
1179 | * The function will try to align the end offset to alignment boundaries so | |
1180 | * that the request will at least end aligned and consecutive requests will | |
1181 | * also start at an aligned offset. | |
1182 | */ | |
1183 | static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum, | |
1184 | int64_t sector_num, int alignment) | |
1185 | { | |
1186 | bool is_zero; | |
1187 | int i, tail; | |
1188 | ||
1189 | if (n <= 0) { | |
1190 | *pnum = 0; | |
1191 | return 0; | |
1192 | } | |
1193 | is_zero = buffer_is_zero(buf, BDRV_SECTOR_SIZE); | |
1194 | for(i = 1; i < n; i++) { | |
1195 | buf += BDRV_SECTOR_SIZE; | |
1196 | if (is_zero != buffer_is_zero(buf, BDRV_SECTOR_SIZE)) { | |
1197 | break; | |
1198 | } | |
1199 | } | |
1200 | ||
1201 | if (i == n) { | |
1202 | /* | |
1203 | * The whole buf is the same. | |
1204 | * No reason to split it into chunks, so return now. | |
1205 | */ | |
1206 | *pnum = i; | |
1207 | return !is_zero; | |
1208 | } | |
1209 | ||
1210 | tail = (sector_num + i) & (alignment - 1); | |
1211 | if (tail) { | |
1212 | if (is_zero && i <= tail) { | |
1213 | /* | |
1214 | * For sure next sector after i is data, and it will rewrite this | |
1215 | * tail anyway due to RMW. So, let's just write data now. | |
1216 | */ | |
1217 | is_zero = false; | |
1218 | } | |
1219 | if (!is_zero) { | |
1220 | /* If possible, align up end offset of allocated areas. */ | |
1221 | i += alignment - tail; | |
1222 | i = MIN(i, n); | |
1223 | } else { | |
1224 | /* | |
1225 | * For sure next sector after i is data, and it will rewrite this | |
1226 | * tail anyway due to RMW. Better is avoid RMW and write zeroes up | |
1227 | * to aligned bound. | |
1228 | */ | |
1229 | i -= tail; | |
1230 | } | |
1231 | } | |
1232 | *pnum = i; | |
1233 | return !is_zero; | |
1234 | } | |
1235 | ||
1236 | /* | |
1237 | * Like is_allocated_sectors, but if the buffer starts with a used sector, | |
1238 | * up to 'min' consecutive sectors containing zeros are ignored. This avoids | |
1239 | * breaking up write requests for only small sparse areas. | |
1240 | */ | |
1241 | static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, | |
1242 | int min, int64_t sector_num, int alignment) | |
1243 | { | |
1244 | int ret; | |
1245 | int num_checked, num_used; | |
1246 | ||
1247 | if (n < min) { | |
1248 | min = n; | |
1249 | } | |
1250 | ||
1251 | ret = is_allocated_sectors(buf, n, pnum, sector_num, alignment); | |
1252 | if (!ret) { | |
1253 | return ret; | |
1254 | } | |
1255 | ||
1256 | num_used = *pnum; | |
1257 | buf += BDRV_SECTOR_SIZE * *pnum; | |
1258 | n -= *pnum; | |
1259 | sector_num += *pnum; | |
1260 | num_checked = num_used; | |
1261 | ||
1262 | while (n > 0) { | |
1263 | ret = is_allocated_sectors(buf, n, pnum, sector_num, alignment); | |
1264 | ||
1265 | buf += BDRV_SECTOR_SIZE * *pnum; | |
1266 | n -= *pnum; | |
1267 | sector_num += *pnum; | |
1268 | num_checked += *pnum; | |
1269 | if (ret) { | |
1270 | num_used = num_checked; | |
1271 | } else if (*pnum >= min) { | |
1272 | break; | |
1273 | } | |
1274 | } | |
1275 | ||
1276 | *pnum = num_used; | |
1277 | return 1; | |
1278 | } | |
1279 | ||
1280 | /* | |
1281 | * Compares two buffers chunk by chunk, where @chsize is the chunk size. | |
1282 | * If @chsize is 0, default chunk size of BDRV_SECTOR_SIZE is used. | |
1283 | * Returns 0 if the first chunk of each buffer matches, non-zero otherwise. | |
1284 | * | |
1285 | * @pnum is set to the size of the buffer prefix aligned to @chsize that | |
1286 | * has the same matching status as the first chunk. | |
1287 | */ | |
1288 | static int compare_buffers(const uint8_t *buf1, const uint8_t *buf2, | |
1289 | int64_t bytes, uint64_t chsize, int64_t *pnum) | |
1290 | { | |
1291 | bool res; | |
1292 | int64_t i; | |
1293 | ||
1294 | assert(bytes > 0); | |
1295 | ||
1296 | if (!chsize) { | |
1297 | chsize = BDRV_SECTOR_SIZE; | |
1298 | } | |
1299 | i = MIN(bytes, chsize); | |
1300 | ||
1301 | res = !!memcmp(buf1, buf2, i); | |
1302 | while (i < bytes) { | |
1303 | int64_t len = MIN(bytes - i, chsize); | |
1304 | ||
1305 | if (!!memcmp(buf1 + i, buf2 + i, len) != res) { | |
1306 | break; | |
1307 | } | |
1308 | i += len; | |
1309 | } | |
1310 | ||
1311 | *pnum = i; | |
1312 | return res; | |
1313 | } | |
1314 | ||
1315 | #define IO_BUF_SIZE (2 * MiB) | |
1316 | ||
1317 | /* | |
1318 | * Check if passed sectors are empty (not allocated or contain only 0 bytes) | |
1319 | * | |
1320 | * Intended for use by 'qemu-img compare': Returns 0 in case sectors are | |
1321 | * filled with 0, 1 if sectors contain non-zero data (this is a comparison | |
1322 | * failure), and 4 on error (the exit status for read errors), after emitting | |
1323 | * an error message. | |
1324 | * | |
1325 | * @param blk: BlockBackend for the image | |
1326 | * @param offset: Starting offset to check | |
1327 | * @param bytes: Number of bytes to check | |
1328 | * @param filename: Name of disk file we are checking (logging purpose) | |
1329 | * @param buffer: Allocated buffer for storing read data | |
1330 | * @param quiet: Flag for quiet mode | |
1331 | */ | |
1332 | static int check_empty_sectors(BlockBackend *blk, int64_t offset, | |
1333 | int64_t bytes, const char *filename, | |
1334 | uint8_t *buffer, bool quiet) | |
1335 | { | |
1336 | int ret = 0; | |
1337 | int64_t idx; | |
1338 | ||
1339 | ret = blk_pread(blk, offset, bytes, buffer, 0); | |
1340 | if (ret < 0) { | |
1341 | error_report("Error while reading offset %" PRId64 " of %s: %s", | |
1342 | offset, filename, strerror(-ret)); | |
1343 | return 4; | |
1344 | } | |
1345 | idx = find_nonzero(buffer, bytes); | |
1346 | if (idx >= 0) { | |
1347 | qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", | |
1348 | offset + idx); | |
1349 | return 1; | |
1350 | } | |
1351 | ||
1352 | return 0; | |
1353 | } | |
1354 | ||
1355 | /* | |
1356 | * Compares two images. Exit codes: | |
1357 | * | |
1358 | * 0 - Images are identical or the requested help was printed | |
1359 | * 1 - Images differ | |
1360 | * >1 - Error occurred | |
1361 | */ | |
1362 | static int img_compare(int argc, char **argv) | |
1363 | { | |
1364 | const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2; | |
1365 | BlockBackend *blk1, *blk2; | |
1366 | BlockDriverState *bs1, *bs2; | |
1367 | int64_t total_size1, total_size2; | |
1368 | uint8_t *buf1 = NULL, *buf2 = NULL; | |
1369 | int64_t pnum1, pnum2; | |
1370 | int allocated1, allocated2; | |
1371 | int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */ | |
1372 | bool progress = false, quiet = false, strict = false; | |
1373 | int flags; | |
1374 | bool writethrough; | |
1375 | int64_t total_size; | |
1376 | int64_t offset = 0; | |
1377 | int64_t chunk; | |
1378 | int c; | |
1379 | uint64_t progress_base; | |
1380 | bool image_opts = false; | |
1381 | bool force_share = false; | |
1382 | ||
1383 | cache = BDRV_DEFAULT_CACHE; | |
1384 | for (;;) { | |
1385 | static const struct option long_options[] = { | |
1386 | {"help", no_argument, 0, 'h'}, | |
1387 | {"object", required_argument, 0, OPTION_OBJECT}, | |
1388 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
1389 | {"force-share", no_argument, 0, 'U'}, | |
1390 | {0, 0, 0, 0} | |
1391 | }; | |
1392 | c = getopt_long(argc, argv, ":hf:F:T:pqsU", | |
1393 | long_options, NULL); | |
1394 | if (c == -1) { | |
1395 | break; | |
1396 | } | |
1397 | switch (c) { | |
1398 | case ':': | |
1399 | missing_argument(argv[optind - 1]); | |
1400 | break; | |
1401 | case '?': | |
1402 | unrecognized_option(argv[optind - 1]); | |
1403 | break; | |
1404 | case 'h': | |
1405 | help(); | |
1406 | break; | |
1407 | case 'f': | |
1408 | fmt1 = optarg; | |
1409 | break; | |
1410 | case 'F': | |
1411 | fmt2 = optarg; | |
1412 | break; | |
1413 | case 'T': | |
1414 | cache = optarg; | |
1415 | break; | |
1416 | case 'p': | |
1417 | progress = true; | |
1418 | break; | |
1419 | case 'q': | |
1420 | quiet = true; | |
1421 | break; | |
1422 | case 's': | |
1423 | strict = true; | |
1424 | break; | |
1425 | case 'U': | |
1426 | force_share = true; | |
1427 | break; | |
1428 | case OPTION_OBJECT: | |
1429 | { | |
1430 | Error *local_err = NULL; | |
1431 | ||
1432 | if (!user_creatable_add_from_str(optarg, &local_err)) { | |
1433 | if (local_err) { | |
1434 | error_report_err(local_err); | |
1435 | exit(2); | |
1436 | } else { | |
1437 | /* Help was printed */ | |
1438 | exit(EXIT_SUCCESS); | |
1439 | } | |
1440 | } | |
1441 | break; | |
1442 | } | |
1443 | case OPTION_IMAGE_OPTS: | |
1444 | image_opts = true; | |
1445 | break; | |
1446 | } | |
1447 | } | |
1448 | ||
1449 | /* Progress is not shown in Quiet mode */ | |
1450 | if (quiet) { | |
1451 | progress = false; | |
1452 | } | |
1453 | ||
1454 | ||
1455 | if (optind != argc - 2) { | |
1456 | error_exit("Expecting two image file names"); | |
1457 | } | |
1458 | filename1 = argv[optind++]; | |
1459 | filename2 = argv[optind++]; | |
1460 | ||
1461 | /* Initialize before goto out */ | |
1462 | qemu_progress_init(progress, 2.0); | |
1463 | ||
1464 | flags = 0; | |
1465 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
1466 | if (ret < 0) { | |
1467 | error_report("Invalid source cache option: %s", cache); | |
1468 | ret = 2; | |
1469 | goto out3; | |
1470 | } | |
1471 | ||
1472 | blk1 = img_open(image_opts, filename1, fmt1, flags, writethrough, quiet, | |
1473 | force_share); | |
1474 | if (!blk1) { | |
1475 | ret = 2; | |
1476 | goto out3; | |
1477 | } | |
1478 | ||
1479 | blk2 = img_open(image_opts, filename2, fmt2, flags, writethrough, quiet, | |
1480 | force_share); | |
1481 | if (!blk2) { | |
1482 | ret = 2; | |
1483 | goto out2; | |
1484 | } | |
1485 | bs1 = blk_bs(blk1); | |
1486 | bs2 = blk_bs(blk2); | |
1487 | ||
1488 | buf1 = blk_blockalign(blk1, IO_BUF_SIZE); | |
1489 | buf2 = blk_blockalign(blk2, IO_BUF_SIZE); | |
1490 | total_size1 = blk_getlength(blk1); | |
1491 | if (total_size1 < 0) { | |
1492 | error_report("Can't get size of %s: %s", | |
1493 | filename1, strerror(-total_size1)); | |
1494 | ret = 4; | |
1495 | goto out; | |
1496 | } | |
1497 | total_size2 = blk_getlength(blk2); | |
1498 | if (total_size2 < 0) { | |
1499 | error_report("Can't get size of %s: %s", | |
1500 | filename2, strerror(-total_size2)); | |
1501 | ret = 4; | |
1502 | goto out; | |
1503 | } | |
1504 | total_size = MIN(total_size1, total_size2); | |
1505 | progress_base = MAX(total_size1, total_size2); | |
1506 | ||
1507 | qemu_progress_print(0, 100); | |
1508 | ||
1509 | if (strict && total_size1 != total_size2) { | |
1510 | ret = 1; | |
1511 | qprintf(quiet, "Strict mode: Image size mismatch!\n"); | |
1512 | goto out; | |
1513 | } | |
1514 | ||
1515 | while (offset < total_size) { | |
1516 | int status1, status2; | |
1517 | ||
1518 | status1 = bdrv_block_status_above(bs1, NULL, offset, | |
1519 | total_size1 - offset, &pnum1, NULL, | |
1520 | NULL); | |
1521 | if (status1 < 0) { | |
1522 | ret = 3; | |
1523 | error_report("Sector allocation test failed for %s", filename1); | |
1524 | goto out; | |
1525 | } | |
1526 | allocated1 = status1 & BDRV_BLOCK_ALLOCATED; | |
1527 | ||
1528 | status2 = bdrv_block_status_above(bs2, NULL, offset, | |
1529 | total_size2 - offset, &pnum2, NULL, | |
1530 | NULL); | |
1531 | if (status2 < 0) { | |
1532 | ret = 3; | |
1533 | error_report("Sector allocation test failed for %s", filename2); | |
1534 | goto out; | |
1535 | } | |
1536 | allocated2 = status2 & BDRV_BLOCK_ALLOCATED; | |
1537 | ||
1538 | assert(pnum1 && pnum2); | |
1539 | chunk = MIN(pnum1, pnum2); | |
1540 | ||
1541 | if (strict) { | |
1542 | if (status1 != status2) { | |
1543 | ret = 1; | |
1544 | qprintf(quiet, "Strict mode: Offset %" PRId64 | |
1545 | " block status mismatch!\n", offset); | |
1546 | goto out; | |
1547 | } | |
1548 | } | |
1549 | if ((status1 & BDRV_BLOCK_ZERO) && (status2 & BDRV_BLOCK_ZERO)) { | |
1550 | /* nothing to do */ | |
1551 | } else if (allocated1 == allocated2) { | |
1552 | if (allocated1) { | |
1553 | int64_t pnum; | |
1554 | ||
1555 | chunk = MIN(chunk, IO_BUF_SIZE); | |
1556 | ret = blk_pread(blk1, offset, chunk, buf1, 0); | |
1557 | if (ret < 0) { | |
1558 | error_report("Error while reading offset %" PRId64 | |
1559 | " of %s: %s", | |
1560 | offset, filename1, strerror(-ret)); | |
1561 | ret = 4; | |
1562 | goto out; | |
1563 | } | |
1564 | ret = blk_pread(blk2, offset, chunk, buf2, 0); | |
1565 | if (ret < 0) { | |
1566 | error_report("Error while reading offset %" PRId64 | |
1567 | " of %s: %s", | |
1568 | offset, filename2, strerror(-ret)); | |
1569 | ret = 4; | |
1570 | goto out; | |
1571 | } | |
1572 | ret = compare_buffers(buf1, buf2, chunk, 0, &pnum); | |
1573 | if (ret || pnum != chunk) { | |
1574 | qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", | |
1575 | offset + (ret ? 0 : pnum)); | |
1576 | ret = 1; | |
1577 | goto out; | |
1578 | } | |
1579 | } | |
1580 | } else { | |
1581 | chunk = MIN(chunk, IO_BUF_SIZE); | |
1582 | if (allocated1) { | |
1583 | ret = check_empty_sectors(blk1, offset, chunk, | |
1584 | filename1, buf1, quiet); | |
1585 | } else { | |
1586 | ret = check_empty_sectors(blk2, offset, chunk, | |
1587 | filename2, buf1, quiet); | |
1588 | } | |
1589 | if (ret) { | |
1590 | goto out; | |
1591 | } | |
1592 | } | |
1593 | offset += chunk; | |
1594 | qemu_progress_print(((float) chunk / progress_base) * 100, 100); | |
1595 | } | |
1596 | ||
1597 | if (total_size1 != total_size2) { | |
1598 | BlockBackend *blk_over; | |
1599 | const char *filename_over; | |
1600 | ||
1601 | qprintf(quiet, "Warning: Image size mismatch!\n"); | |
1602 | if (total_size1 > total_size2) { | |
1603 | blk_over = blk1; | |
1604 | filename_over = filename1; | |
1605 | } else { | |
1606 | blk_over = blk2; | |
1607 | filename_over = filename2; | |
1608 | } | |
1609 | ||
1610 | while (offset < progress_base) { | |
1611 | ret = bdrv_block_status_above(blk_bs(blk_over), NULL, offset, | |
1612 | progress_base - offset, &chunk, | |
1613 | NULL, NULL); | |
1614 | if (ret < 0) { | |
1615 | ret = 3; | |
1616 | error_report("Sector allocation test failed for %s", | |
1617 | filename_over); | |
1618 | goto out; | |
1619 | ||
1620 | } | |
1621 | if (ret & BDRV_BLOCK_ALLOCATED && !(ret & BDRV_BLOCK_ZERO)) { | |
1622 | chunk = MIN(chunk, IO_BUF_SIZE); | |
1623 | ret = check_empty_sectors(blk_over, offset, chunk, | |
1624 | filename_over, buf1, quiet); | |
1625 | if (ret) { | |
1626 | goto out; | |
1627 | } | |
1628 | } | |
1629 | offset += chunk; | |
1630 | qemu_progress_print(((float) chunk / progress_base) * 100, 100); | |
1631 | } | |
1632 | } | |
1633 | ||
1634 | qprintf(quiet, "Images are identical.\n"); | |
1635 | ret = 0; | |
1636 | ||
1637 | out: | |
1638 | qemu_vfree(buf1); | |
1639 | qemu_vfree(buf2); | |
1640 | blk_unref(blk2); | |
1641 | out2: | |
1642 | blk_unref(blk1); | |
1643 | out3: | |
1644 | qemu_progress_end(); | |
1645 | return ret; | |
1646 | } | |
1647 | ||
1648 | /* Convenience wrapper around qmp_block_dirty_bitmap_merge */ | |
1649 | static void do_dirty_bitmap_merge(const char *dst_node, const char *dst_name, | |
1650 | const char *src_node, const char *src_name, | |
1651 | Error **errp) | |
1652 | { | |
1653 | BlockDirtyBitmapOrStr *merge_src; | |
1654 | BlockDirtyBitmapOrStrList *list = NULL; | |
1655 | ||
1656 | merge_src = g_new0(BlockDirtyBitmapOrStr, 1); | |
1657 | merge_src->type = QTYPE_QDICT; | |
1658 | merge_src->u.external.node = g_strdup(src_node); | |
1659 | merge_src->u.external.name = g_strdup(src_name); | |
1660 | QAPI_LIST_PREPEND(list, merge_src); | |
1661 | qmp_block_dirty_bitmap_merge(dst_node, dst_name, list, errp); | |
1662 | qapi_free_BlockDirtyBitmapOrStrList(list); | |
1663 | } | |
1664 | ||
1665 | enum ImgConvertBlockStatus { | |
1666 | BLK_DATA, | |
1667 | BLK_ZERO, | |
1668 | BLK_BACKING_FILE, | |
1669 | }; | |
1670 | ||
1671 | #define MAX_COROUTINES 16 | |
1672 | #define CONVERT_THROTTLE_GROUP "img_convert" | |
1673 | ||
1674 | typedef struct ImgConvertState { | |
1675 | BlockBackend **src; | |
1676 | int64_t *src_sectors; | |
1677 | int *src_alignment; | |
1678 | int src_num; | |
1679 | int64_t total_sectors; | |
1680 | int64_t allocated_sectors; | |
1681 | int64_t allocated_done; | |
1682 | int64_t sector_num; | |
1683 | int64_t wr_offs; | |
1684 | enum ImgConvertBlockStatus status; | |
1685 | int64_t sector_next_status; | |
1686 | BlockBackend *target; | |
1687 | bool has_zero_init; | |
1688 | bool compressed; | |
1689 | bool target_is_new; | |
1690 | bool target_has_backing; | |
1691 | int64_t target_backing_sectors; /* negative if unknown */ | |
1692 | bool wr_in_order; | |
1693 | bool copy_range; | |
1694 | bool salvage; | |
1695 | bool quiet; | |
1696 | int min_sparse; | |
1697 | int alignment; | |
1698 | size_t cluster_sectors; | |
1699 | size_t buf_sectors; | |
1700 | long num_coroutines; | |
1701 | int running_coroutines; | |
1702 | Coroutine *co[MAX_COROUTINES]; | |
1703 | int64_t wait_sector_num[MAX_COROUTINES]; | |
1704 | CoMutex lock; | |
1705 | int ret; | |
1706 | } ImgConvertState; | |
1707 | ||
1708 | static void convert_select_part(ImgConvertState *s, int64_t sector_num, | |
1709 | int *src_cur, int64_t *src_cur_offset) | |
1710 | { | |
1711 | *src_cur = 0; | |
1712 | *src_cur_offset = 0; | |
1713 | while (sector_num - *src_cur_offset >= s->src_sectors[*src_cur]) { | |
1714 | *src_cur_offset += s->src_sectors[*src_cur]; | |
1715 | (*src_cur)++; | |
1716 | assert(*src_cur < s->src_num); | |
1717 | } | |
1718 | } | |
1719 | ||
1720 | static int coroutine_mixed_fn GRAPH_RDLOCK | |
1721 | convert_iteration_sectors(ImgConvertState *s, int64_t sector_num) | |
1722 | { | |
1723 | int64_t src_cur_offset; | |
1724 | int ret, n, src_cur; | |
1725 | bool post_backing_zero = false; | |
1726 | ||
1727 | convert_select_part(s, sector_num, &src_cur, &src_cur_offset); | |
1728 | ||
1729 | assert(s->total_sectors > sector_num); | |
1730 | n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS); | |
1731 | ||
1732 | if (s->target_backing_sectors >= 0) { | |
1733 | if (sector_num >= s->target_backing_sectors) { | |
1734 | post_backing_zero = true; | |
1735 | } else if (sector_num + n > s->target_backing_sectors) { | |
1736 | /* Split requests around target_backing_sectors (because | |
1737 | * starting from there, zeros are handled differently) */ | |
1738 | n = s->target_backing_sectors - sector_num; | |
1739 | } | |
1740 | } | |
1741 | ||
1742 | if (s->sector_next_status <= sector_num) { | |
1743 | uint64_t offset = (sector_num - src_cur_offset) * BDRV_SECTOR_SIZE; | |
1744 | int64_t count; | |
1745 | int tail; | |
1746 | BlockDriverState *src_bs = blk_bs(s->src[src_cur]); | |
1747 | BlockDriverState *base; | |
1748 | ||
1749 | if (s->target_has_backing) { | |
1750 | base = bdrv_cow_bs(bdrv_skip_filters(src_bs)); | |
1751 | } else { | |
1752 | base = NULL; | |
1753 | } | |
1754 | ||
1755 | do { | |
1756 | count = n * BDRV_SECTOR_SIZE; | |
1757 | ||
1758 | ret = bdrv_block_status_above(src_bs, base, offset, count, &count, | |
1759 | NULL, NULL); | |
1760 | ||
1761 | if (ret < 0) { | |
1762 | if (s->salvage) { | |
1763 | if (n == 1) { | |
1764 | if (!s->quiet) { | |
1765 | warn_report("error while reading block status at " | |
1766 | "offset %" PRIu64 ": %s", offset, | |
1767 | strerror(-ret)); | |
1768 | } | |
1769 | /* Just try to read the data, then */ | |
1770 | ret = BDRV_BLOCK_DATA; | |
1771 | count = BDRV_SECTOR_SIZE; | |
1772 | } else { | |
1773 | /* Retry on a shorter range */ | |
1774 | n = DIV_ROUND_UP(n, 4); | |
1775 | } | |
1776 | } else { | |
1777 | error_report("error while reading block status at offset " | |
1778 | "%" PRIu64 ": %s", offset, strerror(-ret)); | |
1779 | return ret; | |
1780 | } | |
1781 | } | |
1782 | } while (ret < 0); | |
1783 | ||
1784 | n = DIV_ROUND_UP(count, BDRV_SECTOR_SIZE); | |
1785 | ||
1786 | /* | |
1787 | * Avoid that s->sector_next_status becomes unaligned to the source | |
1788 | * request alignment and/or cluster size to avoid unnecessary read | |
1789 | * cycles. | |
1790 | */ | |
1791 | tail = (sector_num - src_cur_offset + n) % s->src_alignment[src_cur]; | |
1792 | if (n > tail) { | |
1793 | n -= tail; | |
1794 | } | |
1795 | ||
1796 | if (ret & BDRV_BLOCK_ZERO) { | |
1797 | s->status = post_backing_zero ? BLK_BACKING_FILE : BLK_ZERO; | |
1798 | } else if (ret & BDRV_BLOCK_DATA) { | |
1799 | s->status = BLK_DATA; | |
1800 | } else { | |
1801 | s->status = s->target_has_backing ? BLK_BACKING_FILE : BLK_DATA; | |
1802 | } | |
1803 | ||
1804 | s->sector_next_status = sector_num + n; | |
1805 | } | |
1806 | ||
1807 | n = MIN(n, s->sector_next_status - sector_num); | |
1808 | if (s->status == BLK_DATA) { | |
1809 | n = MIN(n, s->buf_sectors); | |
1810 | } | |
1811 | ||
1812 | /* We need to write complete clusters for compressed images, so if an | |
1813 | * unallocated area is shorter than that, we must consider the whole | |
1814 | * cluster allocated. */ | |
1815 | if (s->compressed) { | |
1816 | if (n < s->cluster_sectors) { | |
1817 | n = MIN(s->cluster_sectors, s->total_sectors - sector_num); | |
1818 | s->status = BLK_DATA; | |
1819 | } else { | |
1820 | n = QEMU_ALIGN_DOWN(n, s->cluster_sectors); | |
1821 | } | |
1822 | } | |
1823 | ||
1824 | return n; | |
1825 | } | |
1826 | ||
1827 | static int coroutine_fn convert_co_read(ImgConvertState *s, int64_t sector_num, | |
1828 | int nb_sectors, uint8_t *buf) | |
1829 | { | |
1830 | uint64_t single_read_until = 0; | |
1831 | int n, ret; | |
1832 | ||
1833 | assert(nb_sectors <= s->buf_sectors); | |
1834 | while (nb_sectors > 0) { | |
1835 | BlockBackend *blk; | |
1836 | int src_cur; | |
1837 | int64_t bs_sectors, src_cur_offset; | |
1838 | uint64_t offset; | |
1839 | ||
1840 | /* In the case of compression with multiple source files, we can get a | |
1841 | * nb_sectors that spreads into the next part. So we must be able to | |
1842 | * read across multiple BDSes for one convert_read() call. */ | |
1843 | convert_select_part(s, sector_num, &src_cur, &src_cur_offset); | |
1844 | blk = s->src[src_cur]; | |
1845 | bs_sectors = s->src_sectors[src_cur]; | |
1846 | ||
1847 | offset = (sector_num - src_cur_offset) << BDRV_SECTOR_BITS; | |
1848 | ||
1849 | n = MIN(nb_sectors, bs_sectors - (sector_num - src_cur_offset)); | |
1850 | if (single_read_until > offset) { | |
1851 | n = 1; | |
1852 | } | |
1853 | ||
1854 | ret = blk_co_pread(blk, offset, n << BDRV_SECTOR_BITS, buf, 0); | |
1855 | if (ret < 0) { | |
1856 | if (s->salvage) { | |
1857 | if (n > 1) { | |
1858 | single_read_until = offset + (n << BDRV_SECTOR_BITS); | |
1859 | continue; | |
1860 | } else { | |
1861 | if (!s->quiet) { | |
1862 | warn_report("error while reading offset %" PRIu64 | |
1863 | ": %s", offset, strerror(-ret)); | |
1864 | } | |
1865 | memset(buf, 0, BDRV_SECTOR_SIZE); | |
1866 | } | |
1867 | } else { | |
1868 | return ret; | |
1869 | } | |
1870 | } | |
1871 | ||
1872 | sector_num += n; | |
1873 | nb_sectors -= n; | |
1874 | buf += n * BDRV_SECTOR_SIZE; | |
1875 | } | |
1876 | ||
1877 | return 0; | |
1878 | } | |
1879 | ||
1880 | ||
1881 | static int coroutine_fn convert_co_write(ImgConvertState *s, int64_t sector_num, | |
1882 | int nb_sectors, uint8_t *buf, | |
1883 | enum ImgConvertBlockStatus status) | |
1884 | { | |
1885 | int ret; | |
1886 | ||
1887 | while (nb_sectors > 0) { | |
1888 | int n = nb_sectors; | |
1889 | BdrvRequestFlags flags = s->compressed ? BDRV_REQ_WRITE_COMPRESSED : 0; | |
1890 | ||
1891 | switch (status) { | |
1892 | case BLK_BACKING_FILE: | |
1893 | /* If we have a backing file, leave clusters unallocated that are | |
1894 | * unallocated in the source image, so that the backing file is | |
1895 | * visible at the respective offset. */ | |
1896 | assert(s->target_has_backing); | |
1897 | break; | |
1898 | ||
1899 | case BLK_DATA: | |
1900 | /* If we're told to keep the target fully allocated (-S 0) or there | |
1901 | * is real non-zero data, we must write it. Otherwise we can treat | |
1902 | * it as zero sectors. | |
1903 | * Compressed clusters need to be written as a whole, so in that | |
1904 | * case we can only save the write if the buffer is completely | |
1905 | * zeroed. */ | |
1906 | if (!s->min_sparse || | |
1907 | (!s->compressed && | |
1908 | is_allocated_sectors_min(buf, n, &n, s->min_sparse, | |
1909 | sector_num, s->alignment)) || | |
1910 | (s->compressed && | |
1911 | !buffer_is_zero(buf, n * BDRV_SECTOR_SIZE))) | |
1912 | { | |
1913 | ret = blk_co_pwrite(s->target, sector_num << BDRV_SECTOR_BITS, | |
1914 | n << BDRV_SECTOR_BITS, buf, flags); | |
1915 | if (ret < 0) { | |
1916 | return ret; | |
1917 | } | |
1918 | break; | |
1919 | } | |
1920 | /* fall-through */ | |
1921 | ||
1922 | case BLK_ZERO: | |
1923 | if (s->has_zero_init) { | |
1924 | assert(!s->target_has_backing); | |
1925 | break; | |
1926 | } | |
1927 | ret = blk_co_pwrite_zeroes(s->target, | |
1928 | sector_num << BDRV_SECTOR_BITS, | |
1929 | n << BDRV_SECTOR_BITS, | |
1930 | BDRV_REQ_MAY_UNMAP); | |
1931 | if (ret < 0) { | |
1932 | return ret; | |
1933 | } | |
1934 | break; | |
1935 | } | |
1936 | ||
1937 | sector_num += n; | |
1938 | nb_sectors -= n; | |
1939 | buf += n * BDRV_SECTOR_SIZE; | |
1940 | } | |
1941 | ||
1942 | return 0; | |
1943 | } | |
1944 | ||
1945 | static int coroutine_fn convert_co_copy_range(ImgConvertState *s, int64_t sector_num, | |
1946 | int nb_sectors) | |
1947 | { | |
1948 | int n, ret; | |
1949 | ||
1950 | while (nb_sectors > 0) { | |
1951 | BlockBackend *blk; | |
1952 | int src_cur; | |
1953 | int64_t bs_sectors, src_cur_offset; | |
1954 | int64_t offset; | |
1955 | ||
1956 | convert_select_part(s, sector_num, &src_cur, &src_cur_offset); | |
1957 | offset = (sector_num - src_cur_offset) << BDRV_SECTOR_BITS; | |
1958 | blk = s->src[src_cur]; | |
1959 | bs_sectors = s->src_sectors[src_cur]; | |
1960 | ||
1961 | n = MIN(nb_sectors, bs_sectors - (sector_num - src_cur_offset)); | |
1962 | ||
1963 | ret = blk_co_copy_range(blk, offset, s->target, | |
1964 | sector_num << BDRV_SECTOR_BITS, | |
1965 | n << BDRV_SECTOR_BITS, 0, 0); | |
1966 | if (ret < 0) { | |
1967 | return ret; | |
1968 | } | |
1969 | ||
1970 | sector_num += n; | |
1971 | nb_sectors -= n; | |
1972 | } | |
1973 | return 0; | |
1974 | } | |
1975 | ||
1976 | static void coroutine_fn convert_co_do_copy(void *opaque) | |
1977 | { | |
1978 | ImgConvertState *s = opaque; | |
1979 | uint8_t *buf = NULL; | |
1980 | int ret, i; | |
1981 | int index = -1; | |
1982 | ||
1983 | for (i = 0; i < s->num_coroutines; i++) { | |
1984 | if (s->co[i] == qemu_coroutine_self()) { | |
1985 | index = i; | |
1986 | break; | |
1987 | } | |
1988 | } | |
1989 | assert(index >= 0); | |
1990 | ||
1991 | s->running_coroutines++; | |
1992 | buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE); | |
1993 | ||
1994 | while (1) { | |
1995 | int n; | |
1996 | int64_t sector_num; | |
1997 | enum ImgConvertBlockStatus status; | |
1998 | bool copy_range; | |
1999 | ||
2000 | qemu_co_mutex_lock(&s->lock); | |
2001 | if (s->ret != -EINPROGRESS || s->sector_num >= s->total_sectors) { | |
2002 | qemu_co_mutex_unlock(&s->lock); | |
2003 | break; | |
2004 | } | |
2005 | WITH_GRAPH_RDLOCK_GUARD() { | |
2006 | n = convert_iteration_sectors(s, s->sector_num); | |
2007 | } | |
2008 | if (n < 0) { | |
2009 | qemu_co_mutex_unlock(&s->lock); | |
2010 | s->ret = n; | |
2011 | break; | |
2012 | } | |
2013 | /* save current sector and allocation status to local variables */ | |
2014 | sector_num = s->sector_num; | |
2015 | status = s->status; | |
2016 | if (!s->min_sparse && s->status == BLK_ZERO) { | |
2017 | n = MIN(n, s->buf_sectors); | |
2018 | } | |
2019 | /* increment global sector counter so that other coroutines can | |
2020 | * already continue reading beyond this request */ | |
2021 | s->sector_num += n; | |
2022 | qemu_co_mutex_unlock(&s->lock); | |
2023 | ||
2024 | if (status == BLK_DATA || (!s->min_sparse && status == BLK_ZERO)) { | |
2025 | s->allocated_done += n; | |
2026 | qemu_progress_print(100.0 * s->allocated_done / | |
2027 | s->allocated_sectors, 0); | |
2028 | } | |
2029 | ||
2030 | retry: | |
2031 | copy_range = s->copy_range && s->status == BLK_DATA; | |
2032 | if (status == BLK_DATA && !copy_range) { | |
2033 | ret = convert_co_read(s, sector_num, n, buf); | |
2034 | if (ret < 0) { | |
2035 | error_report("error while reading at byte %lld: %s", | |
2036 | sector_num * BDRV_SECTOR_SIZE, strerror(-ret)); | |
2037 | s->ret = ret; | |
2038 | } | |
2039 | } else if (!s->min_sparse && status == BLK_ZERO) { | |
2040 | status = BLK_DATA; | |
2041 | memset(buf, 0x00, n * BDRV_SECTOR_SIZE); | |
2042 | } | |
2043 | ||
2044 | if (s->wr_in_order) { | |
2045 | /* keep writes in order */ | |
2046 | while (s->wr_offs != sector_num && s->ret == -EINPROGRESS) { | |
2047 | s->wait_sector_num[index] = sector_num; | |
2048 | qemu_coroutine_yield(); | |
2049 | } | |
2050 | s->wait_sector_num[index] = -1; | |
2051 | } | |
2052 | ||
2053 | if (s->ret == -EINPROGRESS) { | |
2054 | if (copy_range) { | |
2055 | WITH_GRAPH_RDLOCK_GUARD() { | |
2056 | ret = convert_co_copy_range(s, sector_num, n); | |
2057 | } | |
2058 | if (ret) { | |
2059 | s->copy_range = false; | |
2060 | goto retry; | |
2061 | } | |
2062 | } else { | |
2063 | ret = convert_co_write(s, sector_num, n, buf, status); | |
2064 | } | |
2065 | if (ret < 0) { | |
2066 | error_report("error while writing at byte %lld: %s", | |
2067 | sector_num * BDRV_SECTOR_SIZE, strerror(-ret)); | |
2068 | s->ret = ret; | |
2069 | } | |
2070 | } | |
2071 | ||
2072 | if (s->wr_in_order) { | |
2073 | /* reenter the coroutine that might have waited | |
2074 | * for this write to complete */ | |
2075 | s->wr_offs = sector_num + n; | |
2076 | for (i = 0; i < s->num_coroutines; i++) { | |
2077 | if (s->co[i] && s->wait_sector_num[i] == s->wr_offs) { | |
2078 | /* | |
2079 | * A -> B -> A cannot occur because A has | |
2080 | * s->wait_sector_num[i] == -1 during A -> B. Therefore | |
2081 | * B will never enter A during this time window. | |
2082 | */ | |
2083 | qemu_coroutine_enter(s->co[i]); | |
2084 | break; | |
2085 | } | |
2086 | } | |
2087 | } | |
2088 | } | |
2089 | ||
2090 | qemu_vfree(buf); | |
2091 | s->co[index] = NULL; | |
2092 | s->running_coroutines--; | |
2093 | if (!s->running_coroutines && s->ret == -EINPROGRESS) { | |
2094 | /* the convert job finished successfully */ | |
2095 | s->ret = 0; | |
2096 | } | |
2097 | } | |
2098 | ||
2099 | static int convert_do_copy(ImgConvertState *s) | |
2100 | { | |
2101 | int ret, i, n; | |
2102 | int64_t sector_num = 0; | |
2103 | ||
2104 | /* Check whether we have zero initialisation or can get it efficiently */ | |
2105 | if (!s->has_zero_init && s->target_is_new && s->min_sparse && | |
2106 | !s->target_has_backing) { | |
2107 | bdrv_graph_rdlock_main_loop(); | |
2108 | s->has_zero_init = bdrv_has_zero_init(blk_bs(s->target)); | |
2109 | bdrv_graph_rdunlock_main_loop(); | |
2110 | } | |
2111 | ||
2112 | /* Allocate buffer for copied data. For compressed images, only one cluster | |
2113 | * can be copied at a time. */ | |
2114 | if (s->compressed) { | |
2115 | if (s->cluster_sectors <= 0 || s->cluster_sectors > s->buf_sectors) { | |
2116 | error_report("invalid cluster size"); | |
2117 | return -EINVAL; | |
2118 | } | |
2119 | s->buf_sectors = s->cluster_sectors; | |
2120 | } | |
2121 | ||
2122 | while (sector_num < s->total_sectors) { | |
2123 | bdrv_graph_rdlock_main_loop(); | |
2124 | n = convert_iteration_sectors(s, sector_num); | |
2125 | bdrv_graph_rdunlock_main_loop(); | |
2126 | if (n < 0) { | |
2127 | return n; | |
2128 | } | |
2129 | if (s->status == BLK_DATA || (!s->min_sparse && s->status == BLK_ZERO)) | |
2130 | { | |
2131 | s->allocated_sectors += n; | |
2132 | } | |
2133 | sector_num += n; | |
2134 | } | |
2135 | ||
2136 | /* Do the copy */ | |
2137 | s->sector_next_status = 0; | |
2138 | s->ret = -EINPROGRESS; | |
2139 | ||
2140 | qemu_co_mutex_init(&s->lock); | |
2141 | for (i = 0; i < s->num_coroutines; i++) { | |
2142 | s->co[i] = qemu_coroutine_create(convert_co_do_copy, s); | |
2143 | s->wait_sector_num[i] = -1; | |
2144 | qemu_coroutine_enter(s->co[i]); | |
2145 | } | |
2146 | ||
2147 | while (s->running_coroutines) { | |
2148 | main_loop_wait(false); | |
2149 | } | |
2150 | ||
2151 | if (s->compressed && !s->ret) { | |
2152 | /* signal EOF to align */ | |
2153 | ret = blk_pwrite_compressed(s->target, 0, 0, NULL); | |
2154 | if (ret < 0) { | |
2155 | return ret; | |
2156 | } | |
2157 | } | |
2158 | ||
2159 | return s->ret; | |
2160 | } | |
2161 | ||
2162 | /* Check that bitmaps can be copied, or output an error */ | |
2163 | static int convert_check_bitmaps(BlockDriverState *src, bool skip_broken) | |
2164 | { | |
2165 | BdrvDirtyBitmap *bm; | |
2166 | ||
2167 | if (!bdrv_supports_persistent_dirty_bitmap(src)) { | |
2168 | error_report("Source lacks bitmap support"); | |
2169 | return -1; | |
2170 | } | |
2171 | FOR_EACH_DIRTY_BITMAP(src, bm) { | |
2172 | if (!bdrv_dirty_bitmap_get_persistence(bm)) { | |
2173 | continue; | |
2174 | } | |
2175 | if (!skip_broken && bdrv_dirty_bitmap_inconsistent(bm)) { | |
2176 | error_report("Cannot copy inconsistent bitmap '%s'", | |
2177 | bdrv_dirty_bitmap_name(bm)); | |
2178 | error_printf("Try --skip-broken-bitmaps, or " | |
2179 | "use 'qemu-img bitmap --remove' to delete it\n"); | |
2180 | return -1; | |
2181 | } | |
2182 | } | |
2183 | return 0; | |
2184 | } | |
2185 | ||
2186 | static int convert_copy_bitmaps(BlockDriverState *src, BlockDriverState *dst, | |
2187 | bool skip_broken) | |
2188 | { | |
2189 | BdrvDirtyBitmap *bm; | |
2190 | Error *err = NULL; | |
2191 | ||
2192 | FOR_EACH_DIRTY_BITMAP(src, bm) { | |
2193 | const char *name; | |
2194 | ||
2195 | if (!bdrv_dirty_bitmap_get_persistence(bm)) { | |
2196 | continue; | |
2197 | } | |
2198 | name = bdrv_dirty_bitmap_name(bm); | |
2199 | if (skip_broken && bdrv_dirty_bitmap_inconsistent(bm)) { | |
2200 | warn_report("Skipping inconsistent bitmap '%s'", name); | |
2201 | continue; | |
2202 | } | |
2203 | qmp_block_dirty_bitmap_add(dst->node_name, name, | |
2204 | true, bdrv_dirty_bitmap_granularity(bm), | |
2205 | true, true, | |
2206 | true, !bdrv_dirty_bitmap_enabled(bm), | |
2207 | &err); | |
2208 | if (err) { | |
2209 | error_reportf_err(err, "Failed to create bitmap %s: ", name); | |
2210 | return -1; | |
2211 | } | |
2212 | ||
2213 | do_dirty_bitmap_merge(dst->node_name, name, src->node_name, name, | |
2214 | &err); | |
2215 | if (err) { | |
2216 | error_reportf_err(err, "Failed to populate bitmap %s: ", name); | |
2217 | qmp_block_dirty_bitmap_remove(dst->node_name, name, NULL); | |
2218 | return -1; | |
2219 | } | |
2220 | } | |
2221 | ||
2222 | return 0; | |
2223 | } | |
2224 | ||
2225 | #define MAX_BUF_SECTORS 32768 | |
2226 | ||
2227 | static void set_rate_limit(BlockBackend *blk, int64_t rate_limit) | |
2228 | { | |
2229 | ThrottleConfig cfg; | |
2230 | ||
2231 | throttle_config_init(&cfg); | |
2232 | cfg.buckets[THROTTLE_BPS_WRITE].avg = rate_limit; | |
2233 | ||
2234 | blk_io_limits_enable(blk, CONVERT_THROTTLE_GROUP); | |
2235 | blk_set_io_limits(blk, &cfg); | |
2236 | } | |
2237 | ||
2238 | static int img_convert(int argc, char **argv) | |
2239 | { | |
2240 | int c, bs_i, flags, src_flags = BDRV_O_NO_SHARE; | |
2241 | const char *fmt = NULL, *out_fmt = NULL, *cache = "unsafe", | |
2242 | *src_cache = BDRV_DEFAULT_CACHE, *out_baseimg = NULL, | |
2243 | *out_filename, *out_baseimg_param, *snapshot_name = NULL, | |
2244 | *backing_fmt = NULL; | |
2245 | BlockDriver *drv = NULL, *proto_drv = NULL; | |
2246 | BlockDriverInfo bdi; | |
2247 | BlockDriverState *out_bs; | |
2248 | QemuOpts *opts = NULL, *sn_opts = NULL; | |
2249 | QemuOptsList *create_opts = NULL; | |
2250 | QDict *open_opts = NULL; | |
2251 | char *options = NULL; | |
2252 | Error *local_err = NULL; | |
2253 | bool writethrough, src_writethrough, image_opts = false, | |
2254 | skip_create = false, progress = false, tgt_image_opts = false; | |
2255 | int64_t ret = -EINVAL; | |
2256 | bool force_share = false; | |
2257 | bool explict_min_sparse = false; | |
2258 | bool bitmaps = false; | |
2259 | bool skip_broken = false; | |
2260 | int64_t rate_limit = 0; | |
2261 | ||
2262 | ImgConvertState s = (ImgConvertState) { | |
2263 | /* Need at least 4k of zeros for sparse detection */ | |
2264 | .min_sparse = 8, | |
2265 | .copy_range = false, | |
2266 | .buf_sectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE, | |
2267 | .wr_in_order = true, | |
2268 | .num_coroutines = 8, | |
2269 | }; | |
2270 | ||
2271 | for(;;) { | |
2272 | static const struct option long_options[] = { | |
2273 | {"help", no_argument, 0, 'h'}, | |
2274 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2275 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2276 | {"force-share", no_argument, 0, 'U'}, | |
2277 | {"target-image-opts", no_argument, 0, OPTION_TARGET_IMAGE_OPTS}, | |
2278 | {"salvage", no_argument, 0, OPTION_SALVAGE}, | |
2279 | {"target-is-zero", no_argument, 0, OPTION_TARGET_IS_ZERO}, | |
2280 | {"bitmaps", no_argument, 0, OPTION_BITMAPS}, | |
2281 | {"skip-broken-bitmaps", no_argument, 0, OPTION_SKIP_BROKEN}, | |
2282 | {0, 0, 0, 0} | |
2283 | }; | |
2284 | c = getopt_long(argc, argv, ":hf:O:B:CcF:o:l:S:pt:T:qnm:WUr:", | |
2285 | long_options, NULL); | |
2286 | if (c == -1) { | |
2287 | break; | |
2288 | } | |
2289 | switch(c) { | |
2290 | case ':': | |
2291 | missing_argument(argv[optind - 1]); | |
2292 | break; | |
2293 | case '?': | |
2294 | unrecognized_option(argv[optind - 1]); | |
2295 | break; | |
2296 | case 'h': | |
2297 | help(); | |
2298 | break; | |
2299 | case 'f': | |
2300 | fmt = optarg; | |
2301 | break; | |
2302 | case 'O': | |
2303 | out_fmt = optarg; | |
2304 | break; | |
2305 | case 'B': | |
2306 | out_baseimg = optarg; | |
2307 | break; | |
2308 | case 'C': | |
2309 | s.copy_range = true; | |
2310 | break; | |
2311 | case 'c': | |
2312 | s.compressed = true; | |
2313 | break; | |
2314 | case 'F': | |
2315 | backing_fmt = optarg; | |
2316 | break; | |
2317 | case 'o': | |
2318 | if (accumulate_options(&options, optarg) < 0) { | |
2319 | goto fail_getopt; | |
2320 | } | |
2321 | break; | |
2322 | case 'l': | |
2323 | if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { | |
2324 | sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, | |
2325 | optarg, false); | |
2326 | if (!sn_opts) { | |
2327 | error_report("Failed in parsing snapshot param '%s'", | |
2328 | optarg); | |
2329 | goto fail_getopt; | |
2330 | } | |
2331 | } else { | |
2332 | snapshot_name = optarg; | |
2333 | } | |
2334 | break; | |
2335 | case 'S': | |
2336 | { | |
2337 | int64_t sval; | |
2338 | ||
2339 | sval = cvtnum("buffer size for sparse output", optarg); | |
2340 | if (sval < 0) { | |
2341 | goto fail_getopt; | |
2342 | } else if (!QEMU_IS_ALIGNED(sval, BDRV_SECTOR_SIZE) || | |
2343 | sval / BDRV_SECTOR_SIZE > MAX_BUF_SECTORS) { | |
2344 | error_report("Invalid buffer size for sparse output specified. " | |
2345 | "Valid sizes are multiples of %llu up to %llu. Select " | |
2346 | "0 to disable sparse detection (fully allocates output).", | |
2347 | BDRV_SECTOR_SIZE, MAX_BUF_SECTORS * BDRV_SECTOR_SIZE); | |
2348 | goto fail_getopt; | |
2349 | } | |
2350 | ||
2351 | s.min_sparse = sval / BDRV_SECTOR_SIZE; | |
2352 | explict_min_sparse = true; | |
2353 | break; | |
2354 | } | |
2355 | case 'p': | |
2356 | progress = true; | |
2357 | break; | |
2358 | case 't': | |
2359 | cache = optarg; | |
2360 | break; | |
2361 | case 'T': | |
2362 | src_cache = optarg; | |
2363 | break; | |
2364 | case 'q': | |
2365 | s.quiet = true; | |
2366 | break; | |
2367 | case 'n': | |
2368 | skip_create = true; | |
2369 | break; | |
2370 | case 'm': | |
2371 | if (qemu_strtol(optarg, NULL, 0, &s.num_coroutines) || | |
2372 | s.num_coroutines < 1 || s.num_coroutines > MAX_COROUTINES) { | |
2373 | error_report("Invalid number of coroutines. Allowed number of" | |
2374 | " coroutines is between 1 and %d", MAX_COROUTINES); | |
2375 | goto fail_getopt; | |
2376 | } | |
2377 | break; | |
2378 | case 'W': | |
2379 | s.wr_in_order = false; | |
2380 | break; | |
2381 | case 'U': | |
2382 | force_share = true; | |
2383 | break; | |
2384 | case 'r': | |
2385 | rate_limit = cvtnum("rate limit", optarg); | |
2386 | if (rate_limit < 0) { | |
2387 | goto fail_getopt; | |
2388 | } | |
2389 | break; | |
2390 | case OPTION_OBJECT: | |
2391 | user_creatable_process_cmdline(optarg); | |
2392 | break; | |
2393 | case OPTION_IMAGE_OPTS: | |
2394 | image_opts = true; | |
2395 | break; | |
2396 | case OPTION_SALVAGE: | |
2397 | s.salvage = true; | |
2398 | break; | |
2399 | case OPTION_TARGET_IMAGE_OPTS: | |
2400 | tgt_image_opts = true; | |
2401 | break; | |
2402 | case OPTION_TARGET_IS_ZERO: | |
2403 | /* | |
2404 | * The user asserting that the target is blank has the | |
2405 | * same effect as the target driver supporting zero | |
2406 | * initialisation. | |
2407 | */ | |
2408 | s.has_zero_init = true; | |
2409 | break; | |
2410 | case OPTION_BITMAPS: | |
2411 | bitmaps = true; | |
2412 | break; | |
2413 | case OPTION_SKIP_BROKEN: | |
2414 | skip_broken = true; | |
2415 | break; | |
2416 | } | |
2417 | } | |
2418 | ||
2419 | if (!out_fmt && !tgt_image_opts) { | |
2420 | out_fmt = "raw"; | |
2421 | } | |
2422 | ||
2423 | if (skip_broken && !bitmaps) { | |
2424 | error_report("Use of --skip-broken-bitmaps requires --bitmaps"); | |
2425 | goto fail_getopt; | |
2426 | } | |
2427 | ||
2428 | if (s.compressed && s.copy_range) { | |
2429 | error_report("Cannot enable copy offloading when -c is used"); | |
2430 | goto fail_getopt; | |
2431 | } | |
2432 | ||
2433 | if (explict_min_sparse && s.copy_range) { | |
2434 | error_report("Cannot enable copy offloading when -S is used"); | |
2435 | goto fail_getopt; | |
2436 | } | |
2437 | ||
2438 | if (s.copy_range && s.salvage) { | |
2439 | error_report("Cannot use copy offloading in salvaging mode"); | |
2440 | goto fail_getopt; | |
2441 | } | |
2442 | ||
2443 | if (tgt_image_opts && !skip_create) { | |
2444 | error_report("--target-image-opts requires use of -n flag"); | |
2445 | goto fail_getopt; | |
2446 | } | |
2447 | ||
2448 | if (skip_create && options) { | |
2449 | error_report("-o has no effect when skipping image creation"); | |
2450 | goto fail_getopt; | |
2451 | } | |
2452 | ||
2453 | if (s.has_zero_init && !skip_create) { | |
2454 | error_report("--target-is-zero requires use of -n flag"); | |
2455 | goto fail_getopt; | |
2456 | } | |
2457 | ||
2458 | s.src_num = argc - optind - 1; | |
2459 | out_filename = s.src_num >= 1 ? argv[argc - 1] : NULL; | |
2460 | ||
2461 | if (options && has_help_option(options)) { | |
2462 | if (out_fmt) { | |
2463 | ret = print_block_option_help(out_filename, out_fmt); | |
2464 | goto fail_getopt; | |
2465 | } else { | |
2466 | error_report("Option help requires a format be specified"); | |
2467 | goto fail_getopt; | |
2468 | } | |
2469 | } | |
2470 | ||
2471 | if (s.src_num < 1) { | |
2472 | error_report("Must specify image file name"); | |
2473 | goto fail_getopt; | |
2474 | } | |
2475 | ||
2476 | /* ret is still -EINVAL until here */ | |
2477 | ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough); | |
2478 | if (ret < 0) { | |
2479 | error_report("Invalid source cache option: %s", src_cache); | |
2480 | goto fail_getopt; | |
2481 | } | |
2482 | ||
2483 | /* Initialize before goto out */ | |
2484 | if (s.quiet) { | |
2485 | progress = false; | |
2486 | } | |
2487 | qemu_progress_init(progress, 1.0); | |
2488 | qemu_progress_print(0, 100); | |
2489 | ||
2490 | s.src = g_new0(BlockBackend *, s.src_num); | |
2491 | s.src_sectors = g_new(int64_t, s.src_num); | |
2492 | s.src_alignment = g_new(int, s.src_num); | |
2493 | ||
2494 | for (bs_i = 0; bs_i < s.src_num; bs_i++) { | |
2495 | BlockDriverState *src_bs; | |
2496 | s.src[bs_i] = img_open(image_opts, argv[optind + bs_i], | |
2497 | fmt, src_flags, src_writethrough, s.quiet, | |
2498 | force_share); | |
2499 | if (!s.src[bs_i]) { | |
2500 | ret = -1; | |
2501 | goto out; | |
2502 | } | |
2503 | s.src_sectors[bs_i] = blk_nb_sectors(s.src[bs_i]); | |
2504 | if (s.src_sectors[bs_i] < 0) { | |
2505 | error_report("Could not get size of %s: %s", | |
2506 | argv[optind + bs_i], strerror(-s.src_sectors[bs_i])); | |
2507 | ret = -1; | |
2508 | goto out; | |
2509 | } | |
2510 | src_bs = blk_bs(s.src[bs_i]); | |
2511 | s.src_alignment[bs_i] = DIV_ROUND_UP(src_bs->bl.request_alignment, | |
2512 | BDRV_SECTOR_SIZE); | |
2513 | if (!bdrv_get_info(src_bs, &bdi)) { | |
2514 | s.src_alignment[bs_i] = MAX(s.src_alignment[bs_i], | |
2515 | bdi.cluster_size / BDRV_SECTOR_SIZE); | |
2516 | } | |
2517 | s.total_sectors += s.src_sectors[bs_i]; | |
2518 | } | |
2519 | ||
2520 | if (sn_opts) { | |
2521 | bdrv_snapshot_load_tmp(blk_bs(s.src[0]), | |
2522 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), | |
2523 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), | |
2524 | &local_err); | |
2525 | } else if (snapshot_name != NULL) { | |
2526 | if (s.src_num > 1) { | |
2527 | error_report("No support for concatenating multiple snapshot"); | |
2528 | ret = -1; | |
2529 | goto out; | |
2530 | } | |
2531 | ||
2532 | bdrv_snapshot_load_tmp_by_id_or_name(blk_bs(s.src[0]), snapshot_name, | |
2533 | &local_err); | |
2534 | } | |
2535 | if (local_err) { | |
2536 | error_reportf_err(local_err, "Failed to load snapshot: "); | |
2537 | ret = -1; | |
2538 | goto out; | |
2539 | } | |
2540 | ||
2541 | if (!skip_create) { | |
2542 | /* Find driver and parse its options */ | |
2543 | drv = bdrv_find_format(out_fmt); | |
2544 | if (!drv) { | |
2545 | error_report("Unknown file format '%s'", out_fmt); | |
2546 | ret = -1; | |
2547 | goto out; | |
2548 | } | |
2549 | ||
2550 | proto_drv = bdrv_find_protocol(out_filename, true, &local_err); | |
2551 | if (!proto_drv) { | |
2552 | error_report_err(local_err); | |
2553 | ret = -1; | |
2554 | goto out; | |
2555 | } | |
2556 | ||
2557 | if (!drv->create_opts) { | |
2558 | error_report("Format driver '%s' does not support image creation", | |
2559 | drv->format_name); | |
2560 | ret = -1; | |
2561 | goto out; | |
2562 | } | |
2563 | ||
2564 | if (!proto_drv->create_opts) { | |
2565 | error_report("Protocol driver '%s' does not support image creation", | |
2566 | proto_drv->format_name); | |
2567 | ret = -1; | |
2568 | goto out; | |
2569 | } | |
2570 | ||
2571 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
2572 | create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); | |
2573 | ||
2574 | opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); | |
2575 | if (options) { | |
2576 | if (!qemu_opts_do_parse(opts, options, NULL, &local_err)) { | |
2577 | error_report_err(local_err); | |
2578 | ret = -1; | |
2579 | goto out; | |
2580 | } | |
2581 | } | |
2582 | ||
2583 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, | |
2584 | s.total_sectors * BDRV_SECTOR_SIZE, &error_abort); | |
2585 | ret = add_old_style_options(out_fmt, opts, out_baseimg, backing_fmt); | |
2586 | if (ret < 0) { | |
2587 | goto out; | |
2588 | } | |
2589 | } | |
2590 | ||
2591 | /* Get backing file name if -o backing_file was used */ | |
2592 | out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); | |
2593 | if (out_baseimg_param) { | |
2594 | out_baseimg = out_baseimg_param; | |
2595 | } | |
2596 | s.target_has_backing = (bool) out_baseimg; | |
2597 | ||
2598 | if (s.has_zero_init && s.target_has_backing) { | |
2599 | error_report("Cannot use --target-is-zero when the destination " | |
2600 | "image has a backing file"); | |
2601 | goto out; | |
2602 | } | |
2603 | ||
2604 | if (s.src_num > 1 && out_baseimg) { | |
2605 | error_report("Having a backing file for the target makes no sense when " | |
2606 | "concatenating multiple input images"); | |
2607 | ret = -1; | |
2608 | goto out; | |
2609 | } | |
2610 | ||
2611 | if (out_baseimg_param) { | |
2612 | if (!qemu_opt_get(opts, BLOCK_OPT_BACKING_FMT)) { | |
2613 | error_report("Use of backing file requires explicit " | |
2614 | "backing format"); | |
2615 | ret = -1; | |
2616 | goto out; | |
2617 | } | |
2618 | } | |
2619 | ||
2620 | /* Check if compression is supported */ | |
2621 | if (s.compressed) { | |
2622 | bool encryption = | |
2623 | qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); | |
2624 | const char *encryptfmt = | |
2625 | qemu_opt_get(opts, BLOCK_OPT_ENCRYPT_FORMAT); | |
2626 | const char *preallocation = | |
2627 | qemu_opt_get(opts, BLOCK_OPT_PREALLOC); | |
2628 | ||
2629 | if (drv && !block_driver_can_compress(drv)) { | |
2630 | error_report("Compression not supported for this file format"); | |
2631 | ret = -1; | |
2632 | goto out; | |
2633 | } | |
2634 | ||
2635 | if (encryption || encryptfmt) { | |
2636 | error_report("Compression and encryption not supported at " | |
2637 | "the same time"); | |
2638 | ret = -1; | |
2639 | goto out; | |
2640 | } | |
2641 | ||
2642 | if (preallocation | |
2643 | && strcmp(preallocation, "off")) | |
2644 | { | |
2645 | error_report("Compression and preallocation not supported at " | |
2646 | "the same time"); | |
2647 | ret = -1; | |
2648 | goto out; | |
2649 | } | |
2650 | } | |
2651 | ||
2652 | /* Determine if bitmaps need copying */ | |
2653 | if (bitmaps) { | |
2654 | if (s.src_num > 1) { | |
2655 | error_report("Copying bitmaps only possible with single source"); | |
2656 | ret = -1; | |
2657 | goto out; | |
2658 | } | |
2659 | ret = convert_check_bitmaps(blk_bs(s.src[0]), skip_broken); | |
2660 | if (ret < 0) { | |
2661 | goto out; | |
2662 | } | |
2663 | } | |
2664 | ||
2665 | /* | |
2666 | * The later open call will need any decryption secrets, and | |
2667 | * bdrv_create() will purge "opts", so extract them now before | |
2668 | * they are lost. | |
2669 | */ | |
2670 | if (!skip_create) { | |
2671 | open_opts = qdict_new(); | |
2672 | qemu_opt_foreach(opts, img_add_key_secrets, open_opts, &error_abort); | |
2673 | ||
2674 | /* Create the new image */ | |
2675 | ret = bdrv_create(drv, out_filename, opts, &local_err); | |
2676 | if (ret < 0) { | |
2677 | error_reportf_err(local_err, "%s: error while converting %s: ", | |
2678 | out_filename, out_fmt); | |
2679 | goto out; | |
2680 | } | |
2681 | } | |
2682 | ||
2683 | s.target_is_new = !skip_create; | |
2684 | ||
2685 | flags = s.min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; | |
2686 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
2687 | if (ret < 0) { | |
2688 | error_report("Invalid cache option: %s", cache); | |
2689 | goto out; | |
2690 | } | |
2691 | ||
2692 | if (flags & BDRV_O_NOCACHE) { | |
2693 | /* | |
2694 | * If we open the target with O_DIRECT, it may be necessary to | |
2695 | * extend its size to align to the physical sector size. | |
2696 | */ | |
2697 | flags |= BDRV_O_RESIZE; | |
2698 | } | |
2699 | ||
2700 | if (skip_create) { | |
2701 | s.target = img_open(tgt_image_opts, out_filename, out_fmt, | |
2702 | flags, writethrough, s.quiet, false); | |
2703 | } else { | |
2704 | /* TODO ultimately we should allow --target-image-opts | |
2705 | * to be used even when -n is not given. | |
2706 | * That has to wait for bdrv_create to be improved | |
2707 | * to allow filenames in option syntax | |
2708 | */ | |
2709 | s.target = img_open_file(out_filename, open_opts, out_fmt, | |
2710 | flags, writethrough, s.quiet, false); | |
2711 | open_opts = NULL; /* blk_new_open will have freed it */ | |
2712 | } | |
2713 | if (!s.target) { | |
2714 | ret = -1; | |
2715 | goto out; | |
2716 | } | |
2717 | out_bs = blk_bs(s.target); | |
2718 | ||
2719 | if (bitmaps && !bdrv_supports_persistent_dirty_bitmap(out_bs)) { | |
2720 | error_report("Format driver '%s' does not support bitmaps", | |
2721 | out_bs->drv->format_name); | |
2722 | ret = -1; | |
2723 | goto out; | |
2724 | } | |
2725 | ||
2726 | if (s.compressed && !block_driver_can_compress(out_bs->drv)) { | |
2727 | error_report("Compression not supported for this file format"); | |
2728 | ret = -1; | |
2729 | goto out; | |
2730 | } | |
2731 | ||
2732 | /* increase bufsectors from the default 4096 (2M) if opt_transfer | |
2733 | * or discard_alignment of the out_bs is greater. Limit to | |
2734 | * MAX_BUF_SECTORS as maximum which is currently 32768 (16MB). */ | |
2735 | s.buf_sectors = MIN(MAX_BUF_SECTORS, | |
2736 | MAX(s.buf_sectors, | |
2737 | MAX(out_bs->bl.opt_transfer >> BDRV_SECTOR_BITS, | |
2738 | out_bs->bl.pdiscard_alignment >> | |
2739 | BDRV_SECTOR_BITS))); | |
2740 | ||
2741 | /* try to align the write requests to the destination to avoid unnecessary | |
2742 | * RMW cycles. */ | |
2743 | s.alignment = MAX(pow2floor(s.min_sparse), | |
2744 | DIV_ROUND_UP(out_bs->bl.request_alignment, | |
2745 | BDRV_SECTOR_SIZE)); | |
2746 | assert(is_power_of_2(s.alignment)); | |
2747 | ||
2748 | if (skip_create) { | |
2749 | int64_t output_sectors = blk_nb_sectors(s.target); | |
2750 | if (output_sectors < 0) { | |
2751 | error_report("unable to get output image length: %s", | |
2752 | strerror(-output_sectors)); | |
2753 | ret = -1; | |
2754 | goto out; | |
2755 | } else if (output_sectors < s.total_sectors) { | |
2756 | error_report("output file is smaller than input file"); | |
2757 | ret = -1; | |
2758 | goto out; | |
2759 | } | |
2760 | } | |
2761 | ||
2762 | if (s.target_has_backing && s.target_is_new) { | |
2763 | /* Errors are treated as "backing length unknown" (which means | |
2764 | * s.target_backing_sectors has to be negative, which it will | |
2765 | * be automatically). The backing file length is used only | |
2766 | * for optimizations, so such a case is not fatal. */ | |
2767 | bdrv_graph_rdlock_main_loop(); | |
2768 | s.target_backing_sectors = | |
2769 | bdrv_nb_sectors(bdrv_backing_chain_next(out_bs)); | |
2770 | bdrv_graph_rdunlock_main_loop(); | |
2771 | } else { | |
2772 | s.target_backing_sectors = -1; | |
2773 | } | |
2774 | ||
2775 | ret = bdrv_get_info(out_bs, &bdi); | |
2776 | if (ret < 0) { | |
2777 | if (s.compressed) { | |
2778 | error_report("could not get block driver info"); | |
2779 | goto out; | |
2780 | } | |
2781 | } else { | |
2782 | s.compressed = s.compressed || bdi.needs_compressed_writes; | |
2783 | s.cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; | |
2784 | } | |
2785 | ||
2786 | if (rate_limit) { | |
2787 | set_rate_limit(s.target, rate_limit); | |
2788 | } | |
2789 | ||
2790 | ret = convert_do_copy(&s); | |
2791 | ||
2792 | /* Now copy the bitmaps */ | |
2793 | if (bitmaps && ret == 0) { | |
2794 | ret = convert_copy_bitmaps(blk_bs(s.src[0]), out_bs, skip_broken); | |
2795 | } | |
2796 | ||
2797 | out: | |
2798 | if (!ret) { | |
2799 | qemu_progress_print(100, 0); | |
2800 | } | |
2801 | qemu_progress_end(); | |
2802 | qemu_opts_del(opts); | |
2803 | qemu_opts_free(create_opts); | |
2804 | qobject_unref(open_opts); | |
2805 | blk_unref(s.target); | |
2806 | if (s.src) { | |
2807 | for (bs_i = 0; bs_i < s.src_num; bs_i++) { | |
2808 | blk_unref(s.src[bs_i]); | |
2809 | } | |
2810 | g_free(s.src); | |
2811 | } | |
2812 | g_free(s.src_sectors); | |
2813 | g_free(s.src_alignment); | |
2814 | fail_getopt: | |
2815 | qemu_opts_del(sn_opts); | |
2816 | g_free(options); | |
2817 | ||
2818 | return !!ret; | |
2819 | } | |
2820 | ||
2821 | ||
2822 | static void dump_snapshots(BlockDriverState *bs) | |
2823 | { | |
2824 | QEMUSnapshotInfo *sn_tab, *sn; | |
2825 | int nb_sns, i; | |
2826 | ||
2827 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2828 | if (nb_sns <= 0) | |
2829 | return; | |
2830 | printf("Snapshot list:\n"); | |
2831 | bdrv_snapshot_dump(NULL); | |
2832 | printf("\n"); | |
2833 | for(i = 0; i < nb_sns; i++) { | |
2834 | sn = &sn_tab[i]; | |
2835 | bdrv_snapshot_dump(sn); | |
2836 | printf("\n"); | |
2837 | } | |
2838 | g_free(sn_tab); | |
2839 | } | |
2840 | ||
2841 | static void dump_json_block_graph_info_list(BlockGraphInfoList *list) | |
2842 | { | |
2843 | GString *str; | |
2844 | QObject *obj; | |
2845 | Visitor *v = qobject_output_visitor_new(&obj); | |
2846 | ||
2847 | visit_type_BlockGraphInfoList(v, NULL, &list, &error_abort); | |
2848 | visit_complete(v, &obj); | |
2849 | str = qobject_to_json_pretty(obj, true); | |
2850 | assert(str != NULL); | |
2851 | printf("%s\n", str->str); | |
2852 | qobject_unref(obj); | |
2853 | visit_free(v); | |
2854 | g_string_free(str, true); | |
2855 | } | |
2856 | ||
2857 | static void dump_json_block_graph_info(BlockGraphInfo *info) | |
2858 | { | |
2859 | GString *str; | |
2860 | QObject *obj; | |
2861 | Visitor *v = qobject_output_visitor_new(&obj); | |
2862 | ||
2863 | visit_type_BlockGraphInfo(v, NULL, &info, &error_abort); | |
2864 | visit_complete(v, &obj); | |
2865 | str = qobject_to_json_pretty(obj, true); | |
2866 | assert(str != NULL); | |
2867 | printf("%s\n", str->str); | |
2868 | qobject_unref(obj); | |
2869 | visit_free(v); | |
2870 | g_string_free(str, true); | |
2871 | } | |
2872 | ||
2873 | static void dump_human_image_info(BlockGraphInfo *info, int indentation, | |
2874 | const char *path) | |
2875 | { | |
2876 | BlockChildInfoList *children_list; | |
2877 | ||
2878 | bdrv_node_info_dump(qapi_BlockGraphInfo_base(info), indentation, | |
2879 | info->children == NULL); | |
2880 | ||
2881 | for (children_list = info->children; children_list; | |
2882 | children_list = children_list->next) | |
2883 | { | |
2884 | BlockChildInfo *child = children_list->value; | |
2885 | g_autofree char *child_path = NULL; | |
2886 | ||
2887 | printf("%*sChild node '%s%s':\n", | |
2888 | indentation * 4, "", path, child->name); | |
2889 | child_path = g_strdup_printf("%s%s/", path, child->name); | |
2890 | dump_human_image_info(child->info, indentation + 1, child_path); | |
2891 | } | |
2892 | } | |
2893 | ||
2894 | static void dump_human_image_info_list(BlockGraphInfoList *list) | |
2895 | { | |
2896 | BlockGraphInfoList *elem; | |
2897 | bool delim = false; | |
2898 | ||
2899 | for (elem = list; elem; elem = elem->next) { | |
2900 | if (delim) { | |
2901 | printf("\n"); | |
2902 | } | |
2903 | delim = true; | |
2904 | ||
2905 | dump_human_image_info(elem->value, 0, "/"); | |
2906 | } | |
2907 | } | |
2908 | ||
2909 | static gboolean str_equal_func(gconstpointer a, gconstpointer b) | |
2910 | { | |
2911 | return strcmp(a, b) == 0; | |
2912 | } | |
2913 | ||
2914 | /** | |
2915 | * Open an image file chain and return an BlockGraphInfoList | |
2916 | * | |
2917 | * @filename: topmost image filename | |
2918 | * @fmt: topmost image format (may be NULL to autodetect) | |
2919 | * @chain: true - enumerate entire backing file chain | |
2920 | * false - only topmost image file | |
2921 | * | |
2922 | * Returns a list of BlockNodeInfo objects or NULL if there was an error | |
2923 | * opening an image file. If there was an error a message will have been | |
2924 | * printed to stderr. | |
2925 | */ | |
2926 | static BlockGraphInfoList *collect_image_info_list(bool image_opts, | |
2927 | const char *filename, | |
2928 | const char *fmt, | |
2929 | bool chain, bool force_share) | |
2930 | { | |
2931 | BlockGraphInfoList *head = NULL; | |
2932 | BlockGraphInfoList **tail = &head; | |
2933 | GHashTable *filenames; | |
2934 | Error *err = NULL; | |
2935 | ||
2936 | filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); | |
2937 | ||
2938 | while (filename) { | |
2939 | BlockBackend *blk; | |
2940 | BlockDriverState *bs; | |
2941 | BlockGraphInfo *info; | |
2942 | ||
2943 | if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { | |
2944 | error_report("Backing file '%s' creates an infinite loop.", | |
2945 | filename); | |
2946 | goto err; | |
2947 | } | |
2948 | g_hash_table_insert(filenames, (gpointer)filename, NULL); | |
2949 | ||
2950 | blk = img_open(image_opts, filename, fmt, | |
2951 | BDRV_O_NO_BACKING | BDRV_O_NO_IO, false, false, | |
2952 | force_share); | |
2953 | if (!blk) { | |
2954 | goto err; | |
2955 | } | |
2956 | bs = blk_bs(blk); | |
2957 | ||
2958 | /* | |
2959 | * Note that the returned BlockGraphInfo object will not have | |
2960 | * information about this image's backing node, because we have opened | |
2961 | * it with BDRV_O_NO_BACKING. Printing this object will therefore not | |
2962 | * duplicate the backing chain information that we obtain by walking | |
2963 | * the chain manually here. | |
2964 | */ | |
2965 | bdrv_graph_rdlock_main_loop(); | |
2966 | bdrv_query_block_graph_info(bs, &info, &err); | |
2967 | bdrv_graph_rdunlock_main_loop(); | |
2968 | ||
2969 | if (err) { | |
2970 | error_report_err(err); | |
2971 | blk_unref(blk); | |
2972 | goto err; | |
2973 | } | |
2974 | ||
2975 | QAPI_LIST_APPEND(tail, info); | |
2976 | ||
2977 | blk_unref(blk); | |
2978 | ||
2979 | /* Clear parameters that only apply to the topmost image */ | |
2980 | filename = fmt = NULL; | |
2981 | image_opts = false; | |
2982 | ||
2983 | if (chain) { | |
2984 | if (info->full_backing_filename) { | |
2985 | filename = info->full_backing_filename; | |
2986 | } else if (info->backing_filename) { | |
2987 | error_report("Could not determine absolute backing filename," | |
2988 | " but backing filename '%s' present", | |
2989 | info->backing_filename); | |
2990 | goto err; | |
2991 | } | |
2992 | if (info->backing_filename_format) { | |
2993 | fmt = info->backing_filename_format; | |
2994 | } | |
2995 | } | |
2996 | } | |
2997 | g_hash_table_destroy(filenames); | |
2998 | return head; | |
2999 | ||
3000 | err: | |
3001 | qapi_free_BlockGraphInfoList(head); | |
3002 | g_hash_table_destroy(filenames); | |
3003 | return NULL; | |
3004 | } | |
3005 | ||
3006 | static int img_info(int argc, char **argv) | |
3007 | { | |
3008 | int c; | |
3009 | OutputFormat output_format = OFORMAT_HUMAN; | |
3010 | bool chain = false; | |
3011 | const char *filename, *fmt, *output; | |
3012 | BlockGraphInfoList *list; | |
3013 | bool image_opts = false; | |
3014 | bool force_share = false; | |
3015 | ||
3016 | fmt = NULL; | |
3017 | output = NULL; | |
3018 | for(;;) { | |
3019 | int option_index = 0; | |
3020 | static const struct option long_options[] = { | |
3021 | {"help", no_argument, 0, 'h'}, | |
3022 | {"format", required_argument, 0, 'f'}, | |
3023 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
3024 | {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, | |
3025 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3026 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3027 | {"force-share", no_argument, 0, 'U'}, | |
3028 | {0, 0, 0, 0} | |
3029 | }; | |
3030 | c = getopt_long(argc, argv, ":f:hU", | |
3031 | long_options, &option_index); | |
3032 | if (c == -1) { | |
3033 | break; | |
3034 | } | |
3035 | switch(c) { | |
3036 | case ':': | |
3037 | missing_argument(argv[optind - 1]); | |
3038 | break; | |
3039 | case '?': | |
3040 | unrecognized_option(argv[optind - 1]); | |
3041 | break; | |
3042 | case 'h': | |
3043 | help(); | |
3044 | break; | |
3045 | case 'f': | |
3046 | fmt = optarg; | |
3047 | break; | |
3048 | case 'U': | |
3049 | force_share = true; | |
3050 | break; | |
3051 | case OPTION_OUTPUT: | |
3052 | output = optarg; | |
3053 | break; | |
3054 | case OPTION_BACKING_CHAIN: | |
3055 | chain = true; | |
3056 | break; | |
3057 | case OPTION_OBJECT: | |
3058 | user_creatable_process_cmdline(optarg); | |
3059 | break; | |
3060 | case OPTION_IMAGE_OPTS: | |
3061 | image_opts = true; | |
3062 | break; | |
3063 | } | |
3064 | } | |
3065 | if (optind != argc - 1) { | |
3066 | error_exit("Expecting one image file name"); | |
3067 | } | |
3068 | filename = argv[optind++]; | |
3069 | ||
3070 | if (output && !strcmp(output, "json")) { | |
3071 | output_format = OFORMAT_JSON; | |
3072 | } else if (output && !strcmp(output, "human")) { | |
3073 | output_format = OFORMAT_HUMAN; | |
3074 | } else if (output) { | |
3075 | error_report("--output must be used with human or json as argument."); | |
3076 | return 1; | |
3077 | } | |
3078 | ||
3079 | list = collect_image_info_list(image_opts, filename, fmt, chain, | |
3080 | force_share); | |
3081 | if (!list) { | |
3082 | return 1; | |
3083 | } | |
3084 | ||
3085 | switch (output_format) { | |
3086 | case OFORMAT_HUMAN: | |
3087 | dump_human_image_info_list(list); | |
3088 | break; | |
3089 | case OFORMAT_JSON: | |
3090 | if (chain) { | |
3091 | dump_json_block_graph_info_list(list); | |
3092 | } else { | |
3093 | dump_json_block_graph_info(list->value); | |
3094 | } | |
3095 | break; | |
3096 | } | |
3097 | ||
3098 | qapi_free_BlockGraphInfoList(list); | |
3099 | return 0; | |
3100 | } | |
3101 | ||
3102 | static int dump_map_entry(OutputFormat output_format, MapEntry *e, | |
3103 | MapEntry *next) | |
3104 | { | |
3105 | switch (output_format) { | |
3106 | case OFORMAT_HUMAN: | |
3107 | if (e->data && !e->has_offset) { | |
3108 | error_report("File contains external, encrypted or compressed clusters."); | |
3109 | return -1; | |
3110 | } | |
3111 | if (e->data && !e->zero) { | |
3112 | printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", | |
3113 | e->start, e->length, | |
3114 | e->has_offset ? e->offset : 0, | |
3115 | e->filename ?: ""); | |
3116 | } | |
3117 | /* This format ignores the distinction between 0, ZERO and ZERO|DATA. | |
3118 | * Modify the flags here to allow more coalescing. | |
3119 | */ | |
3120 | if (next && (!next->data || next->zero)) { | |
3121 | next->data = false; | |
3122 | next->zero = true; | |
3123 | } | |
3124 | break; | |
3125 | case OFORMAT_JSON: | |
3126 | printf("{ \"start\": %"PRId64", \"length\": %"PRId64"," | |
3127 | " \"depth\": %"PRId64", \"present\": %s, \"zero\": %s," | |
3128 | " \"data\": %s, \"compressed\": %s", | |
3129 | e->start, e->length, e->depth, | |
3130 | e->present ? "true" : "false", | |
3131 | e->zero ? "true" : "false", | |
3132 | e->data ? "true" : "false", | |
3133 | e->compressed ? "true" : "false"); | |
3134 | if (e->has_offset) { | |
3135 | printf(", \"offset\": %"PRId64"", e->offset); | |
3136 | } | |
3137 | putchar('}'); | |
3138 | ||
3139 | if (next) { | |
3140 | puts(","); | |
3141 | } | |
3142 | break; | |
3143 | } | |
3144 | return 0; | |
3145 | } | |
3146 | ||
3147 | static int get_block_status(BlockDriverState *bs, int64_t offset, | |
3148 | int64_t bytes, MapEntry *e) | |
3149 | { | |
3150 | int ret; | |
3151 | int depth; | |
3152 | BlockDriverState *file; | |
3153 | bool has_offset; | |
3154 | int64_t map; | |
3155 | char *filename = NULL; | |
3156 | ||
3157 | GLOBAL_STATE_CODE(); | |
3158 | GRAPH_RDLOCK_GUARD_MAINLOOP(); | |
3159 | ||
3160 | /* As an optimization, we could cache the current range of unallocated | |
3161 | * clusters in each file of the chain, and avoid querying the same | |
3162 | * range repeatedly. | |
3163 | */ | |
3164 | ||
3165 | depth = 0; | |
3166 | for (;;) { | |
3167 | bs = bdrv_skip_filters(bs); | |
3168 | ret = bdrv_block_status(bs, offset, bytes, &bytes, &map, &file); | |
3169 | if (ret < 0) { | |
3170 | return ret; | |
3171 | } | |
3172 | assert(bytes); | |
3173 | if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { | |
3174 | break; | |
3175 | } | |
3176 | bs = bdrv_cow_bs(bs); | |
3177 | if (bs == NULL) { | |
3178 | ret = 0; | |
3179 | break; | |
3180 | } | |
3181 | ||
3182 | depth++; | |
3183 | } | |
3184 | ||
3185 | has_offset = !!(ret & BDRV_BLOCK_OFFSET_VALID); | |
3186 | ||
3187 | if (file && has_offset) { | |
3188 | bdrv_refresh_filename(file); | |
3189 | filename = file->filename; | |
3190 | } | |
3191 | ||
3192 | *e = (MapEntry) { | |
3193 | .start = offset, | |
3194 | .length = bytes, | |
3195 | .data = !!(ret & BDRV_BLOCK_DATA), | |
3196 | .zero = !!(ret & BDRV_BLOCK_ZERO), | |
3197 | .compressed = !!(ret & BDRV_BLOCK_COMPRESSED), | |
3198 | .offset = map, | |
3199 | .has_offset = has_offset, | |
3200 | .depth = depth, | |
3201 | .present = !!(ret & BDRV_BLOCK_ALLOCATED), | |
3202 | .filename = filename, | |
3203 | }; | |
3204 | ||
3205 | return 0; | |
3206 | } | |
3207 | ||
3208 | static inline bool entry_mergeable(const MapEntry *curr, const MapEntry *next) | |
3209 | { | |
3210 | if (curr->length == 0) { | |
3211 | return false; | |
3212 | } | |
3213 | if (curr->zero != next->zero || | |
3214 | curr->data != next->data || | |
3215 | curr->compressed != next->compressed || | |
3216 | curr->depth != next->depth || | |
3217 | curr->present != next->present || | |
3218 | !curr->filename != !next->filename || | |
3219 | curr->has_offset != next->has_offset) { | |
3220 | return false; | |
3221 | } | |
3222 | if (curr->filename && strcmp(curr->filename, next->filename)) { | |
3223 | return false; | |
3224 | } | |
3225 | if (curr->has_offset && curr->offset + curr->length != next->offset) { | |
3226 | return false; | |
3227 | } | |
3228 | return true; | |
3229 | } | |
3230 | ||
3231 | static int img_map(int argc, char **argv) | |
3232 | { | |
3233 | int c; | |
3234 | OutputFormat output_format = OFORMAT_HUMAN; | |
3235 | BlockBackend *blk; | |
3236 | BlockDriverState *bs; | |
3237 | const char *filename, *fmt, *output; | |
3238 | int64_t length; | |
3239 | MapEntry curr = { .length = 0 }, next; | |
3240 | int ret = 0; | |
3241 | bool image_opts = false; | |
3242 | bool force_share = false; | |
3243 | int64_t start_offset = 0; | |
3244 | int64_t max_length = -1; | |
3245 | ||
3246 | fmt = NULL; | |
3247 | output = NULL; | |
3248 | for (;;) { | |
3249 | int option_index = 0; | |
3250 | static const struct option long_options[] = { | |
3251 | {"help", no_argument, 0, 'h'}, | |
3252 | {"format", required_argument, 0, 'f'}, | |
3253 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
3254 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3255 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3256 | {"force-share", no_argument, 0, 'U'}, | |
3257 | {"start-offset", required_argument, 0, 's'}, | |
3258 | {"max-length", required_argument, 0, 'l'}, | |
3259 | {0, 0, 0, 0} | |
3260 | }; | |
3261 | c = getopt_long(argc, argv, ":f:s:l:hU", | |
3262 | long_options, &option_index); | |
3263 | if (c == -1) { | |
3264 | break; | |
3265 | } | |
3266 | switch (c) { | |
3267 | case ':': | |
3268 | missing_argument(argv[optind - 1]); | |
3269 | break; | |
3270 | case '?': | |
3271 | unrecognized_option(argv[optind - 1]); | |
3272 | break; | |
3273 | case 'h': | |
3274 | help(); | |
3275 | break; | |
3276 | case 'f': | |
3277 | fmt = optarg; | |
3278 | break; | |
3279 | case 'U': | |
3280 | force_share = true; | |
3281 | break; | |
3282 | case OPTION_OUTPUT: | |
3283 | output = optarg; | |
3284 | break; | |
3285 | case 's': | |
3286 | start_offset = cvtnum("start offset", optarg); | |
3287 | if (start_offset < 0) { | |
3288 | return 1; | |
3289 | } | |
3290 | break; | |
3291 | case 'l': | |
3292 | max_length = cvtnum("max length", optarg); | |
3293 | if (max_length < 0) { | |
3294 | return 1; | |
3295 | } | |
3296 | break; | |
3297 | case OPTION_OBJECT: | |
3298 | user_creatable_process_cmdline(optarg); | |
3299 | break; | |
3300 | case OPTION_IMAGE_OPTS: | |
3301 | image_opts = true; | |
3302 | break; | |
3303 | } | |
3304 | } | |
3305 | if (optind != argc - 1) { | |
3306 | error_exit("Expecting one image file name"); | |
3307 | } | |
3308 | filename = argv[optind]; | |
3309 | ||
3310 | if (output && !strcmp(output, "json")) { | |
3311 | output_format = OFORMAT_JSON; | |
3312 | } else if (output && !strcmp(output, "human")) { | |
3313 | output_format = OFORMAT_HUMAN; | |
3314 | } else if (output) { | |
3315 | error_report("--output must be used with human or json as argument."); | |
3316 | return 1; | |
3317 | } | |
3318 | ||
3319 | blk = img_open(image_opts, filename, fmt, 0, false, false, force_share); | |
3320 | if (!blk) { | |
3321 | return 1; | |
3322 | } | |
3323 | bs = blk_bs(blk); | |
3324 | ||
3325 | if (output_format == OFORMAT_HUMAN) { | |
3326 | printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); | |
3327 | } else if (output_format == OFORMAT_JSON) { | |
3328 | putchar('['); | |
3329 | } | |
3330 | ||
3331 | length = blk_getlength(blk); | |
3332 | if (length < 0) { | |
3333 | error_report("Failed to get size for '%s'", filename); | |
3334 | return 1; | |
3335 | } | |
3336 | if (max_length != -1) { | |
3337 | length = MIN(start_offset + max_length, length); | |
3338 | } | |
3339 | ||
3340 | curr.start = start_offset; | |
3341 | while (curr.start + curr.length < length) { | |
3342 | int64_t offset = curr.start + curr.length; | |
3343 | int64_t n = length - offset; | |
3344 | ||
3345 | ret = get_block_status(bs, offset, n, &next); | |
3346 | if (ret < 0) { | |
3347 | error_report("Could not read file metadata: %s", strerror(-ret)); | |
3348 | goto out; | |
3349 | } | |
3350 | ||
3351 | if (entry_mergeable(&curr, &next)) { | |
3352 | curr.length += next.length; | |
3353 | continue; | |
3354 | } | |
3355 | ||
3356 | if (curr.length > 0) { | |
3357 | ret = dump_map_entry(output_format, &curr, &next); | |
3358 | if (ret < 0) { | |
3359 | goto out; | |
3360 | } | |
3361 | } | |
3362 | curr = next; | |
3363 | } | |
3364 | ||
3365 | ret = dump_map_entry(output_format, &curr, NULL); | |
3366 | if (output_format == OFORMAT_JSON) { | |
3367 | puts("]"); | |
3368 | } | |
3369 | ||
3370 | out: | |
3371 | blk_unref(blk); | |
3372 | return ret < 0; | |
3373 | } | |
3374 | ||
3375 | #define SNAPSHOT_LIST 1 | |
3376 | #define SNAPSHOT_CREATE 2 | |
3377 | #define SNAPSHOT_APPLY 3 | |
3378 | #define SNAPSHOT_DELETE 4 | |
3379 | ||
3380 | static int img_snapshot(int argc, char **argv) | |
3381 | { | |
3382 | BlockBackend *blk; | |
3383 | BlockDriverState *bs; | |
3384 | QEMUSnapshotInfo sn; | |
3385 | char *filename, *snapshot_name = NULL; | |
3386 | int c, ret = 0, bdrv_oflags; | |
3387 | int action = 0; | |
3388 | bool quiet = false; | |
3389 | Error *err = NULL; | |
3390 | bool image_opts = false; | |
3391 | bool force_share = false; | |
3392 | int64_t rt; | |
3393 | ||
3394 | bdrv_oflags = BDRV_O_RDWR; | |
3395 | /* Parse commandline parameters */ | |
3396 | for(;;) { | |
3397 | static const struct option long_options[] = { | |
3398 | {"help", no_argument, 0, 'h'}, | |
3399 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3400 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3401 | {"force-share", no_argument, 0, 'U'}, | |
3402 | {0, 0, 0, 0} | |
3403 | }; | |
3404 | c = getopt_long(argc, argv, ":la:c:d:hqU", | |
3405 | long_options, NULL); | |
3406 | if (c == -1) { | |
3407 | break; | |
3408 | } | |
3409 | switch(c) { | |
3410 | case ':': | |
3411 | missing_argument(argv[optind - 1]); | |
3412 | break; | |
3413 | case '?': | |
3414 | unrecognized_option(argv[optind - 1]); | |
3415 | break; | |
3416 | case 'h': | |
3417 | help(); | |
3418 | return 0; | |
3419 | case 'l': | |
3420 | if (action) { | |
3421 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
3422 | return 0; | |
3423 | } | |
3424 | action = SNAPSHOT_LIST; | |
3425 | bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ | |
3426 | break; | |
3427 | case 'a': | |
3428 | if (action) { | |
3429 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
3430 | return 0; | |
3431 | } | |
3432 | action = SNAPSHOT_APPLY; | |
3433 | snapshot_name = optarg; | |
3434 | break; | |
3435 | case 'c': | |
3436 | if (action) { | |
3437 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
3438 | return 0; | |
3439 | } | |
3440 | action = SNAPSHOT_CREATE; | |
3441 | snapshot_name = optarg; | |
3442 | break; | |
3443 | case 'd': | |
3444 | if (action) { | |
3445 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
3446 | return 0; | |
3447 | } | |
3448 | action = SNAPSHOT_DELETE; | |
3449 | snapshot_name = optarg; | |
3450 | break; | |
3451 | case 'q': | |
3452 | quiet = true; | |
3453 | break; | |
3454 | case 'U': | |
3455 | force_share = true; | |
3456 | break; | |
3457 | case OPTION_OBJECT: | |
3458 | user_creatable_process_cmdline(optarg); | |
3459 | break; | |
3460 | case OPTION_IMAGE_OPTS: | |
3461 | image_opts = true; | |
3462 | break; | |
3463 | } | |
3464 | } | |
3465 | ||
3466 | if (optind != argc - 1) { | |
3467 | error_exit("Expecting one image file name"); | |
3468 | } | |
3469 | filename = argv[optind++]; | |
3470 | ||
3471 | /* Open the image */ | |
3472 | blk = img_open(image_opts, filename, NULL, bdrv_oflags, false, quiet, | |
3473 | force_share); | |
3474 | if (!blk) { | |
3475 | return 1; | |
3476 | } | |
3477 | bs = blk_bs(blk); | |
3478 | ||
3479 | /* Perform the requested action */ | |
3480 | switch(action) { | |
3481 | case SNAPSHOT_LIST: | |
3482 | dump_snapshots(bs); | |
3483 | break; | |
3484 | ||
3485 | case SNAPSHOT_CREATE: | |
3486 | memset(&sn, 0, sizeof(sn)); | |
3487 | pstrcpy(sn.name, sizeof(sn.name), snapshot_name); | |
3488 | ||
3489 | rt = g_get_real_time(); | |
3490 | sn.date_sec = rt / G_USEC_PER_SEC; | |
3491 | sn.date_nsec = (rt % G_USEC_PER_SEC) * 1000; | |
3492 | ||
3493 | bdrv_graph_rdlock_main_loop(); | |
3494 | ret = bdrv_snapshot_create(bs, &sn); | |
3495 | bdrv_graph_rdunlock_main_loop(); | |
3496 | ||
3497 | if (ret) { | |
3498 | error_report("Could not create snapshot '%s': %s", | |
3499 | snapshot_name, strerror(-ret)); | |
3500 | } | |
3501 | break; | |
3502 | ||
3503 | case SNAPSHOT_APPLY: | |
3504 | ret = bdrv_snapshot_goto(bs, snapshot_name, &err); | |
3505 | if (ret) { | |
3506 | error_reportf_err(err, "Could not apply snapshot '%s': ", | |
3507 | snapshot_name); | |
3508 | } | |
3509 | break; | |
3510 | ||
3511 | case SNAPSHOT_DELETE: | |
3512 | bdrv_graph_rdlock_main_loop(); | |
3513 | ret = bdrv_snapshot_find(bs, &sn, snapshot_name); | |
3514 | if (ret < 0) { | |
3515 | error_report("Could not delete snapshot '%s': snapshot not " | |
3516 | "found", snapshot_name); | |
3517 | ret = 1; | |
3518 | } else { | |
3519 | ret = bdrv_snapshot_delete(bs, sn.id_str, sn.name, &err); | |
3520 | if (ret < 0) { | |
3521 | error_reportf_err(err, "Could not delete snapshot '%s': ", | |
3522 | snapshot_name); | |
3523 | ret = 1; | |
3524 | } | |
3525 | } | |
3526 | bdrv_graph_rdunlock_main_loop(); | |
3527 | break; | |
3528 | } | |
3529 | ||
3530 | /* Cleanup */ | |
3531 | blk_unref(blk); | |
3532 | if (ret) { | |
3533 | return 1; | |
3534 | } | |
3535 | return 0; | |
3536 | } | |
3537 | ||
3538 | static int img_rebase(int argc, char **argv) | |
3539 | { | |
3540 | BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL; | |
3541 | uint8_t *buf_old = NULL; | |
3542 | uint8_t *buf_new = NULL; | |
3543 | BlockDriverState *bs = NULL, *prefix_chain_bs = NULL; | |
3544 | BlockDriverState *unfiltered_bs, *unfiltered_bs_cow; | |
3545 | BlockDriverInfo bdi = {0}; | |
3546 | char *filename; | |
3547 | const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; | |
3548 | int c, flags, src_flags, ret; | |
3549 | BdrvRequestFlags write_flags = 0; | |
3550 | bool writethrough, src_writethrough; | |
3551 | int unsafe = 0; | |
3552 | bool force_share = false; | |
3553 | int progress = 0; | |
3554 | bool quiet = false; | |
3555 | bool compress = false; | |
3556 | Error *local_err = NULL; | |
3557 | bool image_opts = false; | |
3558 | int64_t write_align; | |
3559 | ||
3560 | /* Parse commandline parameters */ | |
3561 | fmt = NULL; | |
3562 | cache = BDRV_DEFAULT_CACHE; | |
3563 | src_cache = BDRV_DEFAULT_CACHE; | |
3564 | out_baseimg = NULL; | |
3565 | out_basefmt = NULL; | |
3566 | for(;;) { | |
3567 | static const struct option long_options[] = { | |
3568 | {"help", no_argument, 0, 'h'}, | |
3569 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3570 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3571 | {"force-share", no_argument, 0, 'U'}, | |
3572 | {"compress", no_argument, 0, 'c'}, | |
3573 | {0, 0, 0, 0} | |
3574 | }; | |
3575 | c = getopt_long(argc, argv, ":hf:F:b:upt:T:qUc", | |
3576 | long_options, NULL); | |
3577 | if (c == -1) { | |
3578 | break; | |
3579 | } | |
3580 | switch(c) { | |
3581 | case ':': | |
3582 | missing_argument(argv[optind - 1]); | |
3583 | break; | |
3584 | case '?': | |
3585 | unrecognized_option(argv[optind - 1]); | |
3586 | break; | |
3587 | case 'h': | |
3588 | help(); | |
3589 | return 0; | |
3590 | case 'f': | |
3591 | fmt = optarg; | |
3592 | break; | |
3593 | case 'F': | |
3594 | out_basefmt = optarg; | |
3595 | break; | |
3596 | case 'b': | |
3597 | out_baseimg = optarg; | |
3598 | break; | |
3599 | case 'u': | |
3600 | unsafe = 1; | |
3601 | break; | |
3602 | case 'p': | |
3603 | progress = 1; | |
3604 | break; | |
3605 | case 't': | |
3606 | cache = optarg; | |
3607 | break; | |
3608 | case 'T': | |
3609 | src_cache = optarg; | |
3610 | break; | |
3611 | case 'q': | |
3612 | quiet = true; | |
3613 | break; | |
3614 | case OPTION_OBJECT: | |
3615 | user_creatable_process_cmdline(optarg); | |
3616 | break; | |
3617 | case OPTION_IMAGE_OPTS: | |
3618 | image_opts = true; | |
3619 | break; | |
3620 | case 'U': | |
3621 | force_share = true; | |
3622 | break; | |
3623 | case 'c': | |
3624 | compress = true; | |
3625 | break; | |
3626 | } | |
3627 | } | |
3628 | ||
3629 | if (quiet) { | |
3630 | progress = 0; | |
3631 | } | |
3632 | ||
3633 | if (optind != argc - 1) { | |
3634 | error_exit("Expecting one image file name"); | |
3635 | } | |
3636 | if (!unsafe && !out_baseimg) { | |
3637 | error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); | |
3638 | } | |
3639 | filename = argv[optind++]; | |
3640 | ||
3641 | qemu_progress_init(progress, 2.0); | |
3642 | qemu_progress_print(0, 100); | |
3643 | ||
3644 | flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); | |
3645 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
3646 | if (ret < 0) { | |
3647 | error_report("Invalid cache option: %s", cache); | |
3648 | goto out; | |
3649 | } | |
3650 | ||
3651 | src_flags = 0; | |
3652 | ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough); | |
3653 | if (ret < 0) { | |
3654 | error_report("Invalid source cache option: %s", src_cache); | |
3655 | goto out; | |
3656 | } | |
3657 | ||
3658 | /* The source files are opened read-only, don't care about WCE */ | |
3659 | assert((src_flags & BDRV_O_RDWR) == 0); | |
3660 | (void) src_writethrough; | |
3661 | ||
3662 | /* | |
3663 | * Open the images. | |
3664 | * | |
3665 | * Ignore the old backing file for unsafe rebase in case we want to correct | |
3666 | * the reference to a renamed or moved backing file. | |
3667 | */ | |
3668 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, | |
3669 | false); | |
3670 | if (!blk) { | |
3671 | ret = -1; | |
3672 | goto out; | |
3673 | } | |
3674 | bs = blk_bs(blk); | |
3675 | ||
3676 | bdrv_graph_rdlock_main_loop(); | |
3677 | unfiltered_bs = bdrv_skip_filters(bs); | |
3678 | unfiltered_bs_cow = bdrv_cow_bs(unfiltered_bs); | |
3679 | bdrv_graph_rdunlock_main_loop(); | |
3680 | ||
3681 | if (compress && !block_driver_can_compress(unfiltered_bs->drv)) { | |
3682 | error_report("Compression not supported for this file format"); | |
3683 | ret = -1; | |
3684 | goto out; | |
3685 | } else if (compress) { | |
3686 | write_flags |= BDRV_REQ_WRITE_COMPRESSED; | |
3687 | } | |
3688 | ||
3689 | if (out_basefmt != NULL) { | |
3690 | if (bdrv_find_format(out_basefmt) == NULL) { | |
3691 | error_report("Invalid format name: '%s'", out_basefmt); | |
3692 | ret = -1; | |
3693 | goto out; | |
3694 | } | |
3695 | } | |
3696 | ||
3697 | /* | |
3698 | * We need overlay subcluster size (or cluster size in case writes are | |
3699 | * compressed) to make sure write requests are aligned. | |
3700 | */ | |
3701 | ret = bdrv_get_info(unfiltered_bs, &bdi); | |
3702 | if (ret < 0) { | |
3703 | error_report("could not get block driver info"); | |
3704 | goto out; | |
3705 | } else if (bdi.subcluster_size == 0) { | |
3706 | bdi.cluster_size = bdi.subcluster_size = 1; | |
3707 | } | |
3708 | ||
3709 | write_align = compress ? bdi.cluster_size : bdi.subcluster_size; | |
3710 | ||
3711 | /* For safe rebasing we need to compare old and new backing file */ | |
3712 | if (!unsafe) { | |
3713 | QDict *options = NULL; | |
3714 | BlockDriverState *base_bs; | |
3715 | ||
3716 | bdrv_graph_rdlock_main_loop(); | |
3717 | base_bs = bdrv_cow_bs(unfiltered_bs); | |
3718 | bdrv_graph_rdunlock_main_loop(); | |
3719 | ||
3720 | if (base_bs) { | |
3721 | blk_old_backing = blk_new(qemu_get_aio_context(), | |
3722 | BLK_PERM_CONSISTENT_READ, | |
3723 | BLK_PERM_ALL); | |
3724 | ret = blk_insert_bs(blk_old_backing, base_bs, | |
3725 | &local_err); | |
3726 | if (ret < 0) { | |
3727 | error_reportf_err(local_err, | |
3728 | "Could not reuse old backing file '%s': ", | |
3729 | base_bs->filename); | |
3730 | goto out; | |
3731 | } | |
3732 | } else { | |
3733 | blk_old_backing = NULL; | |
3734 | } | |
3735 | ||
3736 | if (out_baseimg[0]) { | |
3737 | const char *overlay_filename; | |
3738 | char *out_real_path; | |
3739 | ||
3740 | options = qdict_new(); | |
3741 | if (out_basefmt) { | |
3742 | qdict_put_str(options, "driver", out_basefmt); | |
3743 | } | |
3744 | if (force_share) { | |
3745 | qdict_put_bool(options, BDRV_OPT_FORCE_SHARE, true); | |
3746 | } | |
3747 | ||
3748 | bdrv_graph_rdlock_main_loop(); | |
3749 | bdrv_refresh_filename(bs); | |
3750 | bdrv_graph_rdunlock_main_loop(); | |
3751 | overlay_filename = bs->exact_filename[0] ? bs->exact_filename | |
3752 | : bs->filename; | |
3753 | out_real_path = | |
3754 | bdrv_get_full_backing_filename_from_filename(overlay_filename, | |
3755 | out_baseimg, | |
3756 | &local_err); | |
3757 | if (local_err) { | |
3758 | qobject_unref(options); | |
3759 | error_reportf_err(local_err, | |
3760 | "Could not resolve backing filename: "); | |
3761 | ret = -1; | |
3762 | goto out; | |
3763 | } | |
3764 | ||
3765 | /* | |
3766 | * Find out whether we rebase an image on top of a previous image | |
3767 | * in its chain. | |
3768 | */ | |
3769 | prefix_chain_bs = bdrv_find_backing_image(bs, out_real_path); | |
3770 | if (prefix_chain_bs) { | |
3771 | qobject_unref(options); | |
3772 | g_free(out_real_path); | |
3773 | ||
3774 | blk_new_backing = blk_new(qemu_get_aio_context(), | |
3775 | BLK_PERM_CONSISTENT_READ, | |
3776 | BLK_PERM_ALL); | |
3777 | ret = blk_insert_bs(blk_new_backing, prefix_chain_bs, | |
3778 | &local_err); | |
3779 | if (ret < 0) { | |
3780 | error_reportf_err(local_err, | |
3781 | "Could not reuse backing file '%s': ", | |
3782 | out_baseimg); | |
3783 | goto out; | |
3784 | } | |
3785 | } else { | |
3786 | blk_new_backing = blk_new_open(out_real_path, NULL, | |
3787 | options, src_flags, &local_err); | |
3788 | g_free(out_real_path); | |
3789 | if (!blk_new_backing) { | |
3790 | error_reportf_err(local_err, | |
3791 | "Could not open new backing file '%s': ", | |
3792 | out_baseimg); | |
3793 | ret = -1; | |
3794 | goto out; | |
3795 | } | |
3796 | } | |
3797 | } | |
3798 | } | |
3799 | ||
3800 | /* | |
3801 | * Check each unallocated cluster in the COW file. If it is unallocated, | |
3802 | * accesses go to the backing file. We must therefore compare this cluster | |
3803 | * in the old and new backing file, and if they differ we need to copy it | |
3804 | * from the old backing file into the COW file. | |
3805 | * | |
3806 | * If qemu-img crashes during this step, no harm is done. The content of | |
3807 | * the image is the same as the original one at any time. | |
3808 | */ | |
3809 | if (!unsafe) { | |
3810 | int64_t size; | |
3811 | int64_t old_backing_size = 0; | |
3812 | int64_t new_backing_size = 0; | |
3813 | uint64_t offset; | |
3814 | int64_t n, n_old = 0, n_new = 0; | |
3815 | float local_progress = 0; | |
3816 | ||
3817 | if (blk_old_backing && bdrv_opt_mem_align(blk_bs(blk_old_backing)) > | |
3818 | bdrv_opt_mem_align(blk_bs(blk))) { | |
3819 | buf_old = blk_blockalign(blk_old_backing, IO_BUF_SIZE); | |
3820 | } else { | |
3821 | buf_old = blk_blockalign(blk, IO_BUF_SIZE); | |
3822 | } | |
3823 | buf_new = blk_blockalign(blk_new_backing, IO_BUF_SIZE); | |
3824 | ||
3825 | size = blk_getlength(blk); | |
3826 | if (size < 0) { | |
3827 | error_report("Could not get size of '%s': %s", | |
3828 | filename, strerror(-size)); | |
3829 | ret = -1; | |
3830 | goto out; | |
3831 | } | |
3832 | if (blk_old_backing) { | |
3833 | old_backing_size = blk_getlength(blk_old_backing); | |
3834 | if (old_backing_size < 0) { | |
3835 | char backing_name[PATH_MAX]; | |
3836 | ||
3837 | bdrv_get_backing_filename(bs, backing_name, | |
3838 | sizeof(backing_name)); | |
3839 | error_report("Could not get size of '%s': %s", | |
3840 | backing_name, strerror(-old_backing_size)); | |
3841 | ret = -1; | |
3842 | goto out; | |
3843 | } | |
3844 | } | |
3845 | if (blk_new_backing) { | |
3846 | new_backing_size = blk_getlength(blk_new_backing); | |
3847 | if (new_backing_size < 0) { | |
3848 | error_report("Could not get size of '%s': %s", | |
3849 | out_baseimg, strerror(-new_backing_size)); | |
3850 | ret = -1; | |
3851 | goto out; | |
3852 | } | |
3853 | } | |
3854 | ||
3855 | if (size != 0) { | |
3856 | local_progress = (float)100 / (size / MIN(size, IO_BUF_SIZE)); | |
3857 | } | |
3858 | ||
3859 | for (offset = 0; offset < size; offset += n) { | |
3860 | bool old_backing_eof = false; | |
3861 | int64_t n_alloc; | |
3862 | ||
3863 | /* How many bytes can we handle with the next read? */ | |
3864 | n = MIN(IO_BUF_SIZE, size - offset); | |
3865 | ||
3866 | /* If the cluster is allocated, we don't need to take action */ | |
3867 | ret = bdrv_is_allocated(unfiltered_bs, offset, n, &n); | |
3868 | if (ret < 0) { | |
3869 | error_report("error while reading image metadata: %s", | |
3870 | strerror(-ret)); | |
3871 | goto out; | |
3872 | } | |
3873 | if (ret) { | |
3874 | continue; | |
3875 | } | |
3876 | ||
3877 | if (prefix_chain_bs) { | |
3878 | uint64_t bytes = n; | |
3879 | ||
3880 | /* | |
3881 | * If cluster wasn't changed since prefix_chain, we don't need | |
3882 | * to take action | |
3883 | */ | |
3884 | ret = bdrv_is_allocated_above(unfiltered_bs_cow, | |
3885 | prefix_chain_bs, false, | |
3886 | offset, n, &n); | |
3887 | if (ret < 0) { | |
3888 | error_report("error while reading image metadata: %s", | |
3889 | strerror(-ret)); | |
3890 | goto out; | |
3891 | } | |
3892 | if (!ret && n) { | |
3893 | continue; | |
3894 | } | |
3895 | if (!n) { | |
3896 | /* | |
3897 | * If we've reached EOF of the old backing, it means that | |
3898 | * offsets beyond the old backing size were read as zeroes. | |
3899 | * Now we will need to explicitly zero the cluster in | |
3900 | * order to preserve that state after the rebase. | |
3901 | */ | |
3902 | n = bytes; | |
3903 | } | |
3904 | } | |
3905 | ||
3906 | /* | |
3907 | * At this point we know that the region [offset; offset + n) | |
3908 | * is unallocated within the target image. This region might be | |
3909 | * unaligned to the target image's (sub)cluster boundaries, as | |
3910 | * old backing may have smaller clusters (or have subclusters). | |
3911 | * We extend it to the aligned boundaries to avoid CoW on | |
3912 | * partial writes in blk_pwrite(), | |
3913 | */ | |
3914 | n += offset - QEMU_ALIGN_DOWN(offset, write_align); | |
3915 | offset = QEMU_ALIGN_DOWN(offset, write_align); | |
3916 | n += QEMU_ALIGN_UP(offset + n, write_align) - (offset + n); | |
3917 | n = MIN(n, size - offset); | |
3918 | assert(!bdrv_is_allocated(unfiltered_bs, offset, n, &n_alloc) && | |
3919 | n_alloc == n); | |
3920 | ||
3921 | /* | |
3922 | * Much like with the target image, we'll try to read as much | |
3923 | * of the old and new backings as we can. | |
3924 | */ | |
3925 | n_old = MIN(n, MAX(0, old_backing_size - (int64_t) offset)); | |
3926 | n_new = MIN(n, MAX(0, new_backing_size - (int64_t) offset)); | |
3927 | ||
3928 | /* | |
3929 | * Read old and new backing file and take into consideration that | |
3930 | * backing files may be smaller than the COW image. | |
3931 | */ | |
3932 | memset(buf_old + n_old, 0, n - n_old); | |
3933 | if (!n_old) { | |
3934 | old_backing_eof = true; | |
3935 | } else { | |
3936 | ret = blk_pread(blk_old_backing, offset, n_old, buf_old, 0); | |
3937 | if (ret < 0) { | |
3938 | error_report("error while reading from old backing file"); | |
3939 | goto out; | |
3940 | } | |
3941 | } | |
3942 | ||
3943 | memset(buf_new + n_new, 0, n - n_new); | |
3944 | if (n_new) { | |
3945 | ret = blk_pread(blk_new_backing, offset, n_new, buf_new, 0); | |
3946 | if (ret < 0) { | |
3947 | error_report("error while reading from new backing file"); | |
3948 | goto out; | |
3949 | } | |
3950 | } | |
3951 | ||
3952 | /* If they differ, we need to write to the COW file */ | |
3953 | uint64_t written = 0; | |
3954 | ||
3955 | while (written < n) { | |
3956 | int64_t pnum; | |
3957 | ||
3958 | if (compare_buffers(buf_old + written, buf_new + written, | |
3959 | n - written, write_align, &pnum)) | |
3960 | { | |
3961 | if (old_backing_eof) { | |
3962 | ret = blk_pwrite_zeroes(blk, offset + written, pnum, 0); | |
3963 | } else { | |
3964 | assert(written + pnum <= IO_BUF_SIZE); | |
3965 | ret = blk_pwrite(blk, offset + written, pnum, | |
3966 | buf_old + written, write_flags); | |
3967 | } | |
3968 | if (ret < 0) { | |
3969 | error_report("Error while writing to COW image: %s", | |
3970 | strerror(-ret)); | |
3971 | goto out; | |
3972 | } | |
3973 | } | |
3974 | ||
3975 | written += pnum; | |
3976 | if (offset + written >= old_backing_size) { | |
3977 | old_backing_eof = true; | |
3978 | } | |
3979 | } | |
3980 | qemu_progress_print(local_progress, 100); | |
3981 | } | |
3982 | } | |
3983 | ||
3984 | /* | |
3985 | * Change the backing file. All clusters that are different from the old | |
3986 | * backing file are overwritten in the COW file now, so the visible content | |
3987 | * doesn't change when we switch the backing file. | |
3988 | */ | |
3989 | if (out_baseimg && *out_baseimg) { | |
3990 | ret = bdrv_change_backing_file(unfiltered_bs, out_baseimg, out_basefmt, | |
3991 | true); | |
3992 | } else { | |
3993 | ret = bdrv_change_backing_file(unfiltered_bs, NULL, NULL, false); | |
3994 | } | |
3995 | ||
3996 | if (ret == -ENOSPC) { | |
3997 | error_report("Could not change the backing file to '%s': No " | |
3998 | "space left in the file header", out_baseimg); | |
3999 | } else if (ret == -EINVAL && out_baseimg && !out_basefmt) { | |
4000 | error_report("Could not change the backing file to '%s': backing " | |
4001 | "format must be specified", out_baseimg); | |
4002 | } else if (ret < 0) { | |
4003 | error_report("Could not change the backing file to '%s': %s", | |
4004 | out_baseimg, strerror(-ret)); | |
4005 | } | |
4006 | ||
4007 | qemu_progress_print(100, 0); | |
4008 | /* | |
4009 | * TODO At this point it is possible to check if any clusters that are | |
4010 | * allocated in the COW file are the same in the backing file. If so, they | |
4011 | * could be dropped from the COW file. Don't do this before switching the | |
4012 | * backing file, in case of a crash this would lead to corruption. | |
4013 | */ | |
4014 | out: | |
4015 | qemu_progress_end(); | |
4016 | /* Cleanup */ | |
4017 | if (!unsafe) { | |
4018 | blk_unref(blk_old_backing); | |
4019 | blk_unref(blk_new_backing); | |
4020 | } | |
4021 | qemu_vfree(buf_old); | |
4022 | qemu_vfree(buf_new); | |
4023 | ||
4024 | blk_unref(blk); | |
4025 | if (ret) { | |
4026 | return 1; | |
4027 | } | |
4028 | return 0; | |
4029 | } | |
4030 | ||
4031 | static int img_resize(int argc, char **argv) | |
4032 | { | |
4033 | Error *err = NULL; | |
4034 | int c, ret, relative; | |
4035 | const char *filename, *fmt, *size; | |
4036 | int64_t n, total_size, current_size; | |
4037 | bool quiet = false; | |
4038 | BlockBackend *blk = NULL; | |
4039 | PreallocMode prealloc = PREALLOC_MODE_OFF; | |
4040 | QemuOpts *param; | |
4041 | ||
4042 | static QemuOptsList resize_options = { | |
4043 | .name = "resize_options", | |
4044 | .head = QTAILQ_HEAD_INITIALIZER(resize_options.head), | |
4045 | .desc = { | |
4046 | { | |
4047 | .name = BLOCK_OPT_SIZE, | |
4048 | .type = QEMU_OPT_SIZE, | |
4049 | .help = "Virtual disk size" | |
4050 | }, { | |
4051 | /* end of list */ | |
4052 | } | |
4053 | }, | |
4054 | }; | |
4055 | bool image_opts = false; | |
4056 | bool shrink = false; | |
4057 | ||
4058 | /* Remove size from argv manually so that negative numbers are not treated | |
4059 | * as options by getopt. */ | |
4060 | if (argc < 3) { | |
4061 | error_exit("Not enough arguments"); | |
4062 | return 1; | |
4063 | } | |
4064 | ||
4065 | size = argv[--argc]; | |
4066 | ||
4067 | /* Parse getopt arguments */ | |
4068 | fmt = NULL; | |
4069 | for(;;) { | |
4070 | static const struct option long_options[] = { | |
4071 | {"help", no_argument, 0, 'h'}, | |
4072 | {"object", required_argument, 0, OPTION_OBJECT}, | |
4073 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
4074 | {"preallocation", required_argument, 0, OPTION_PREALLOCATION}, | |
4075 | {"shrink", no_argument, 0, OPTION_SHRINK}, | |
4076 | {0, 0, 0, 0} | |
4077 | }; | |
4078 | c = getopt_long(argc, argv, ":f:hq", | |
4079 | long_options, NULL); | |
4080 | if (c == -1) { | |
4081 | break; | |
4082 | } | |
4083 | switch(c) { | |
4084 | case ':': | |
4085 | missing_argument(argv[optind - 1]); | |
4086 | break; | |
4087 | case '?': | |
4088 | unrecognized_option(argv[optind - 1]); | |
4089 | break; | |
4090 | case 'h': | |
4091 | help(); | |
4092 | break; | |
4093 | case 'f': | |
4094 | fmt = optarg; | |
4095 | break; | |
4096 | case 'q': | |
4097 | quiet = true; | |
4098 | break; | |
4099 | case OPTION_OBJECT: | |
4100 | user_creatable_process_cmdline(optarg); | |
4101 | break; | |
4102 | case OPTION_IMAGE_OPTS: | |
4103 | image_opts = true; | |
4104 | break; | |
4105 | case OPTION_PREALLOCATION: | |
4106 | prealloc = qapi_enum_parse(&PreallocMode_lookup, optarg, | |
4107 | PREALLOC_MODE__MAX, NULL); | |
4108 | if (prealloc == PREALLOC_MODE__MAX) { | |
4109 | error_report("Invalid preallocation mode '%s'", optarg); | |
4110 | return 1; | |
4111 | } | |
4112 | break; | |
4113 | case OPTION_SHRINK: | |
4114 | shrink = true; | |
4115 | break; | |
4116 | } | |
4117 | } | |
4118 | if (optind != argc - 1) { | |
4119 | error_exit("Expecting image file name and size"); | |
4120 | } | |
4121 | filename = argv[optind++]; | |
4122 | ||
4123 | /* Choose grow, shrink, or absolute resize mode */ | |
4124 | switch (size[0]) { | |
4125 | case '+': | |
4126 | relative = 1; | |
4127 | size++; | |
4128 | break; | |
4129 | case '-': | |
4130 | relative = -1; | |
4131 | size++; | |
4132 | break; | |
4133 | default: | |
4134 | relative = 0; | |
4135 | break; | |
4136 | } | |
4137 | ||
4138 | /* Parse size */ | |
4139 | param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); | |
4140 | if (!qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err)) { | |
4141 | error_report_err(err); | |
4142 | ret = -1; | |
4143 | qemu_opts_del(param); | |
4144 | goto out; | |
4145 | } | |
4146 | n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); | |
4147 | qemu_opts_del(param); | |
4148 | ||
4149 | blk = img_open(image_opts, filename, fmt, | |
4150 | BDRV_O_RDWR | BDRV_O_RESIZE, false, quiet, | |
4151 | false); | |
4152 | if (!blk) { | |
4153 | ret = -1; | |
4154 | goto out; | |
4155 | } | |
4156 | ||
4157 | current_size = blk_getlength(blk); | |
4158 | if (current_size < 0) { | |
4159 | error_report("Failed to inquire current image length: %s", | |
4160 | strerror(-current_size)); | |
4161 | ret = -1; | |
4162 | goto out; | |
4163 | } | |
4164 | ||
4165 | if (relative) { | |
4166 | total_size = current_size + n * relative; | |
4167 | } else { | |
4168 | total_size = n; | |
4169 | } | |
4170 | if (total_size <= 0) { | |
4171 | error_report("New image size must be positive"); | |
4172 | ret = -1; | |
4173 | goto out; | |
4174 | } | |
4175 | ||
4176 | if (total_size <= current_size && prealloc != PREALLOC_MODE_OFF) { | |
4177 | error_report("Preallocation can only be used for growing images"); | |
4178 | ret = -1; | |
4179 | goto out; | |
4180 | } | |
4181 | ||
4182 | if (total_size < current_size && !shrink) { | |
4183 | error_report("Use the --shrink option to perform a shrink operation."); | |
4184 | warn_report("Shrinking an image will delete all data beyond the " | |
4185 | "shrunken image's end. Before performing such an " | |
4186 | "operation, make sure there is no important data there."); | |
4187 | ret = -1; | |
4188 | goto out; | |
4189 | } | |
4190 | ||
4191 | /* | |
4192 | * The user expects the image to have the desired size after | |
4193 | * resizing, so pass @exact=true. It is of no use to report | |
4194 | * success when the image has not actually been resized. | |
4195 | */ | |
4196 | ret = blk_truncate(blk, total_size, true, prealloc, 0, &err); | |
4197 | if (!ret) { | |
4198 | qprintf(quiet, "Image resized.\n"); | |
4199 | } else { | |
4200 | error_report_err(err); | |
4201 | } | |
4202 | out: | |
4203 | blk_unref(blk); | |
4204 | if (ret) { | |
4205 | return 1; | |
4206 | } | |
4207 | return 0; | |
4208 | } | |
4209 | ||
4210 | static void amend_status_cb(BlockDriverState *bs, | |
4211 | int64_t offset, int64_t total_work_size, | |
4212 | void *opaque) | |
4213 | { | |
4214 | qemu_progress_print(100.f * offset / total_work_size, 0); | |
4215 | } | |
4216 | ||
4217 | static int print_amend_option_help(const char *format) | |
4218 | { | |
4219 | BlockDriver *drv; | |
4220 | ||
4221 | GRAPH_RDLOCK_GUARD_MAINLOOP(); | |
4222 | ||
4223 | /* Find driver and parse its options */ | |
4224 | drv = bdrv_find_format(format); | |
4225 | if (!drv) { | |
4226 | error_report("Unknown file format '%s'", format); | |
4227 | return 1; | |
4228 | } | |
4229 | ||
4230 | if (!drv->bdrv_amend_options) { | |
4231 | error_report("Format driver '%s' does not support option amendment", | |
4232 | format); | |
4233 | return 1; | |
4234 | } | |
4235 | ||
4236 | /* Every driver supporting amendment must have amend_opts */ | |
4237 | assert(drv->amend_opts); | |
4238 | ||
4239 | printf("Amend options for '%s':\n", format); | |
4240 | qemu_opts_print_help(drv->amend_opts, false); | |
4241 | return 0; | |
4242 | } | |
4243 | ||
4244 | static int img_amend(int argc, char **argv) | |
4245 | { | |
4246 | Error *err = NULL; | |
4247 | int c, ret = 0; | |
4248 | char *options = NULL; | |
4249 | QemuOptsList *amend_opts = NULL; | |
4250 | QemuOpts *opts = NULL; | |
4251 | const char *fmt = NULL, *filename, *cache; | |
4252 | int flags; | |
4253 | bool writethrough; | |
4254 | bool quiet = false, progress = false; | |
4255 | BlockBackend *blk = NULL; | |
4256 | BlockDriverState *bs = NULL; | |
4257 | bool image_opts = false; | |
4258 | bool force = false; | |
4259 | ||
4260 | cache = BDRV_DEFAULT_CACHE; | |
4261 | for (;;) { | |
4262 | static const struct option long_options[] = { | |
4263 | {"help", no_argument, 0, 'h'}, | |
4264 | {"object", required_argument, 0, OPTION_OBJECT}, | |
4265 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
4266 | {"force", no_argument, 0, OPTION_FORCE}, | |
4267 | {0, 0, 0, 0} | |
4268 | }; | |
4269 | c = getopt_long(argc, argv, ":ho:f:t:pq", | |
4270 | long_options, NULL); | |
4271 | if (c == -1) { | |
4272 | break; | |
4273 | } | |
4274 | ||
4275 | switch (c) { | |
4276 | case ':': | |
4277 | missing_argument(argv[optind - 1]); | |
4278 | break; | |
4279 | case '?': | |
4280 | unrecognized_option(argv[optind - 1]); | |
4281 | break; | |
4282 | case 'h': | |
4283 | help(); | |
4284 | break; | |
4285 | case 'o': | |
4286 | if (accumulate_options(&options, optarg) < 0) { | |
4287 | ret = -1; | |
4288 | goto out_no_progress; | |
4289 | } | |
4290 | break; | |
4291 | case 'f': | |
4292 | fmt = optarg; | |
4293 | break; | |
4294 | case 't': | |
4295 | cache = optarg; | |
4296 | break; | |
4297 | case 'p': | |
4298 | progress = true; | |
4299 | break; | |
4300 | case 'q': | |
4301 | quiet = true; | |
4302 | break; | |
4303 | case OPTION_OBJECT: | |
4304 | user_creatable_process_cmdline(optarg); | |
4305 | break; | |
4306 | case OPTION_IMAGE_OPTS: | |
4307 | image_opts = true; | |
4308 | break; | |
4309 | case OPTION_FORCE: | |
4310 | force = true; | |
4311 | break; | |
4312 | } | |
4313 | } | |
4314 | ||
4315 | if (!options) { | |
4316 | error_exit("Must specify options (-o)"); | |
4317 | } | |
4318 | ||
4319 | if (quiet) { | |
4320 | progress = false; | |
4321 | } | |
4322 | qemu_progress_init(progress, 1.0); | |
4323 | ||
4324 | filename = (optind == argc - 1) ? argv[argc - 1] : NULL; | |
4325 | if (fmt && has_help_option(options)) { | |
4326 | /* If a format is explicitly specified (and possibly no filename is | |
4327 | * given), print option help here */ | |
4328 | ret = print_amend_option_help(fmt); | |
4329 | goto out; | |
4330 | } | |
4331 | ||
4332 | if (optind != argc - 1) { | |
4333 | error_report("Expecting one image file name"); | |
4334 | ret = -1; | |
4335 | goto out; | |
4336 | } | |
4337 | ||
4338 | flags = BDRV_O_RDWR; | |
4339 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
4340 | if (ret < 0) { | |
4341 | error_report("Invalid cache option: %s", cache); | |
4342 | goto out; | |
4343 | } | |
4344 | ||
4345 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, | |
4346 | false); | |
4347 | if (!blk) { | |
4348 | ret = -1; | |
4349 | goto out; | |
4350 | } | |
4351 | bs = blk_bs(blk); | |
4352 | ||
4353 | fmt = bs->drv->format_name; | |
4354 | ||
4355 | if (has_help_option(options)) { | |
4356 | /* If the format was auto-detected, print option help here */ | |
4357 | ret = print_amend_option_help(fmt); | |
4358 | goto out; | |
4359 | } | |
4360 | ||
4361 | bdrv_graph_rdlock_main_loop(); | |
4362 | if (!bs->drv->bdrv_amend_options) { | |
4363 | error_report("Format driver '%s' does not support option amendment", | |
4364 | fmt); | |
4365 | bdrv_graph_rdunlock_main_loop(); | |
4366 | ret = -1; | |
4367 | goto out; | |
4368 | } | |
4369 | ||
4370 | /* Every driver supporting amendment must have amend_opts */ | |
4371 | assert(bs->drv->amend_opts); | |
4372 | ||
4373 | amend_opts = qemu_opts_append(amend_opts, bs->drv->amend_opts); | |
4374 | opts = qemu_opts_create(amend_opts, NULL, 0, &error_abort); | |
4375 | if (!qemu_opts_do_parse(opts, options, NULL, &err)) { | |
4376 | /* Try to parse options using the create options */ | |
4377 | amend_opts = qemu_opts_append(amend_opts, bs->drv->create_opts); | |
4378 | qemu_opts_del(opts); | |
4379 | opts = qemu_opts_create(amend_opts, NULL, 0, &error_abort); | |
4380 | if (qemu_opts_do_parse(opts, options, NULL, NULL)) { | |
4381 | error_append_hint(&err, | |
4382 | "This option is only supported for image creation\n"); | |
4383 | } | |
4384 | ||
4385 | bdrv_graph_rdunlock_main_loop(); | |
4386 | error_report_err(err); | |
4387 | ret = -1; | |
4388 | goto out; | |
4389 | } | |
4390 | ||
4391 | /* In case the driver does not call amend_status_cb() */ | |
4392 | qemu_progress_print(0.f, 0); | |
4393 | ret = bdrv_amend_options(bs, opts, &amend_status_cb, NULL, force, &err); | |
4394 | qemu_progress_print(100.f, 0); | |
4395 | bdrv_graph_rdunlock_main_loop(); | |
4396 | ||
4397 | if (ret < 0) { | |
4398 | error_report_err(err); | |
4399 | goto out; | |
4400 | } | |
4401 | ||
4402 | out: | |
4403 | qemu_progress_end(); | |
4404 | ||
4405 | out_no_progress: | |
4406 | blk_unref(blk); | |
4407 | qemu_opts_del(opts); | |
4408 | qemu_opts_free(amend_opts); | |
4409 | g_free(options); | |
4410 | ||
4411 | if (ret) { | |
4412 | return 1; | |
4413 | } | |
4414 | return 0; | |
4415 | } | |
4416 | ||
4417 | typedef struct BenchData { | |
4418 | BlockBackend *blk; | |
4419 | uint64_t image_size; | |
4420 | bool write; | |
4421 | int bufsize; | |
4422 | int step; | |
4423 | int nrreq; | |
4424 | int n; | |
4425 | int flush_interval; | |
4426 | bool drain_on_flush; | |
4427 | uint8_t *buf; | |
4428 | QEMUIOVector *qiov; | |
4429 | ||
4430 | int in_flight; | |
4431 | bool in_flush; | |
4432 | uint64_t offset; | |
4433 | } BenchData; | |
4434 | ||
4435 | static void bench_undrained_flush_cb(void *opaque, int ret) | |
4436 | { | |
4437 | if (ret < 0) { | |
4438 | error_report("Failed flush request: %s", strerror(-ret)); | |
4439 | exit(EXIT_FAILURE); | |
4440 | } | |
4441 | } | |
4442 | ||
4443 | static void bench_cb(void *opaque, int ret) | |
4444 | { | |
4445 | BenchData *b = opaque; | |
4446 | BlockAIOCB *acb; | |
4447 | ||
4448 | if (ret < 0) { | |
4449 | error_report("Failed request: %s", strerror(-ret)); | |
4450 | exit(EXIT_FAILURE); | |
4451 | } | |
4452 | ||
4453 | if (b->in_flush) { | |
4454 | /* Just finished a flush with drained queue: Start next requests */ | |
4455 | assert(b->in_flight == 0); | |
4456 | b->in_flush = false; | |
4457 | } else if (b->in_flight > 0) { | |
4458 | int remaining = b->n - b->in_flight; | |
4459 | ||
4460 | b->n--; | |
4461 | b->in_flight--; | |
4462 | ||
4463 | /* Time for flush? Drain queue if requested, then flush */ | |
4464 | if (b->flush_interval && remaining % b->flush_interval == 0) { | |
4465 | if (!b->in_flight || !b->drain_on_flush) { | |
4466 | BlockCompletionFunc *cb; | |
4467 | ||
4468 | if (b->drain_on_flush) { | |
4469 | b->in_flush = true; | |
4470 | cb = bench_cb; | |
4471 | } else { | |
4472 | cb = bench_undrained_flush_cb; | |
4473 | } | |
4474 | ||
4475 | acb = blk_aio_flush(b->blk, cb, b); | |
4476 | if (!acb) { | |
4477 | error_report("Failed to issue flush request"); | |
4478 | exit(EXIT_FAILURE); | |
4479 | } | |
4480 | } | |
4481 | if (b->drain_on_flush) { | |
4482 | return; | |
4483 | } | |
4484 | } | |
4485 | } | |
4486 | ||
4487 | while (b->n > b->in_flight && b->in_flight < b->nrreq) { | |
4488 | int64_t offset = b->offset; | |
4489 | /* blk_aio_* might look for completed I/Os and kick bench_cb | |
4490 | * again, so make sure this operation is counted by in_flight | |
4491 | * and b->offset is ready for the next submission. | |
4492 | */ | |
4493 | b->in_flight++; | |
4494 | b->offset += b->step; | |
4495 | b->offset %= b->image_size; | |
4496 | if (b->write) { | |
4497 | acb = blk_aio_pwritev(b->blk, offset, b->qiov, 0, bench_cb, b); | |
4498 | } else { | |
4499 | acb = blk_aio_preadv(b->blk, offset, b->qiov, 0, bench_cb, b); | |
4500 | } | |
4501 | if (!acb) { | |
4502 | error_report("Failed to issue request"); | |
4503 | exit(EXIT_FAILURE); | |
4504 | } | |
4505 | } | |
4506 | } | |
4507 | ||
4508 | static int img_bench(int argc, char **argv) | |
4509 | { | |
4510 | int c, ret = 0; | |
4511 | const char *fmt = NULL, *filename; | |
4512 | bool quiet = false; | |
4513 | bool image_opts = false; | |
4514 | bool is_write = false; | |
4515 | int count = 75000; | |
4516 | int depth = 64; | |
4517 | int64_t offset = 0; | |
4518 | size_t bufsize = 4096; | |
4519 | int pattern = 0; | |
4520 | size_t step = 0; | |
4521 | int flush_interval = 0; | |
4522 | bool drain_on_flush = true; | |
4523 | int64_t image_size; | |
4524 | BlockBackend *blk = NULL; | |
4525 | BenchData data = {}; | |
4526 | int flags = 0; | |
4527 | bool writethrough = false; | |
4528 | struct timeval t1, t2; | |
4529 | int i; | |
4530 | bool force_share = false; | |
4531 | size_t buf_size = 0; | |
4532 | ||
4533 | for (;;) { | |
4534 | static const struct option long_options[] = { | |
4535 | {"help", no_argument, 0, 'h'}, | |
4536 | {"flush-interval", required_argument, 0, OPTION_FLUSH_INTERVAL}, | |
4537 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
4538 | {"pattern", required_argument, 0, OPTION_PATTERN}, | |
4539 | {"no-drain", no_argument, 0, OPTION_NO_DRAIN}, | |
4540 | {"force-share", no_argument, 0, 'U'}, | |
4541 | {0, 0, 0, 0} | |
4542 | }; | |
4543 | c = getopt_long(argc, argv, ":hc:d:f:ni:o:qs:S:t:wU", long_options, | |
4544 | NULL); | |
4545 | if (c == -1) { | |
4546 | break; | |
4547 | } | |
4548 | ||
4549 | switch (c) { | |
4550 | case ':': | |
4551 | missing_argument(argv[optind - 1]); | |
4552 | break; | |
4553 | case '?': | |
4554 | unrecognized_option(argv[optind - 1]); | |
4555 | break; | |
4556 | case 'h': | |
4557 | help(); | |
4558 | break; | |
4559 | case 'c': | |
4560 | { | |
4561 | unsigned long res; | |
4562 | ||
4563 | if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) { | |
4564 | error_report("Invalid request count specified"); | |
4565 | return 1; | |
4566 | } | |
4567 | count = res; | |
4568 | break; | |
4569 | } | |
4570 | case 'd': | |
4571 | { | |
4572 | unsigned long res; | |
4573 | ||
4574 | if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) { | |
4575 | error_report("Invalid queue depth specified"); | |
4576 | return 1; | |
4577 | } | |
4578 | depth = res; | |
4579 | break; | |
4580 | } | |
4581 | case 'f': | |
4582 | fmt = optarg; | |
4583 | break; | |
4584 | case 'n': | |
4585 | flags |= BDRV_O_NATIVE_AIO; | |
4586 | break; | |
4587 | case 'i': | |
4588 | ret = bdrv_parse_aio(optarg, &flags); | |
4589 | if (ret < 0) { | |
4590 | error_report("Invalid aio option: %s", optarg); | |
4591 | ret = -1; | |
4592 | goto out; | |
4593 | } | |
4594 | break; | |
4595 | case 'o': | |
4596 | { | |
4597 | offset = cvtnum("offset", optarg); | |
4598 | if (offset < 0) { | |
4599 | return 1; | |
4600 | } | |
4601 | break; | |
4602 | } | |
4603 | break; | |
4604 | case 'q': | |
4605 | quiet = true; | |
4606 | break; | |
4607 | case 's': | |
4608 | { | |
4609 | int64_t sval; | |
4610 | ||
4611 | sval = cvtnum_full("buffer size", optarg, 0, INT_MAX); | |
4612 | if (sval < 0) { | |
4613 | return 1; | |
4614 | } | |
4615 | ||
4616 | bufsize = sval; | |
4617 | break; | |
4618 | } | |
4619 | case 'S': | |
4620 | { | |
4621 | int64_t sval; | |
4622 | ||
4623 | sval = cvtnum_full("step_size", optarg, 0, INT_MAX); | |
4624 | if (sval < 0) { | |
4625 | return 1; | |
4626 | } | |
4627 | ||
4628 | step = sval; | |
4629 | break; | |
4630 | } | |
4631 | case 't': | |
4632 | ret = bdrv_parse_cache_mode(optarg, &flags, &writethrough); | |
4633 | if (ret < 0) { | |
4634 | error_report("Invalid cache mode"); | |
4635 | ret = -1; | |
4636 | goto out; | |
4637 | } | |
4638 | break; | |
4639 | case 'w': | |
4640 | flags |= BDRV_O_RDWR; | |
4641 | is_write = true; | |
4642 | break; | |
4643 | case 'U': | |
4644 | force_share = true; | |
4645 | break; | |
4646 | case OPTION_PATTERN: | |
4647 | { | |
4648 | unsigned long res; | |
4649 | ||
4650 | if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > 0xff) { | |
4651 | error_report("Invalid pattern byte specified"); | |
4652 | return 1; | |
4653 | } | |
4654 | pattern = res; | |
4655 | break; | |
4656 | } | |
4657 | case OPTION_FLUSH_INTERVAL: | |
4658 | { | |
4659 | unsigned long res; | |
4660 | ||
4661 | if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) { | |
4662 | error_report("Invalid flush interval specified"); | |
4663 | return 1; | |
4664 | } | |
4665 | flush_interval = res; | |
4666 | break; | |
4667 | } | |
4668 | case OPTION_NO_DRAIN: | |
4669 | drain_on_flush = false; | |
4670 | break; | |
4671 | case OPTION_IMAGE_OPTS: | |
4672 | image_opts = true; | |
4673 | break; | |
4674 | } | |
4675 | } | |
4676 | ||
4677 | if (optind != argc - 1) { | |
4678 | error_exit("Expecting one image file name"); | |
4679 | } | |
4680 | filename = argv[argc - 1]; | |
4681 | ||
4682 | if (!is_write && flush_interval) { | |
4683 | error_report("--flush-interval is only available in write tests"); | |
4684 | ret = -1; | |
4685 | goto out; | |
4686 | } | |
4687 | if (flush_interval && flush_interval < depth) { | |
4688 | error_report("Flush interval can't be smaller than depth"); | |
4689 | ret = -1; | |
4690 | goto out; | |
4691 | } | |
4692 | ||
4693 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, | |
4694 | force_share); | |
4695 | if (!blk) { | |
4696 | ret = -1; | |
4697 | goto out; | |
4698 | } | |
4699 | ||
4700 | image_size = blk_getlength(blk); | |
4701 | if (image_size < 0) { | |
4702 | ret = image_size; | |
4703 | goto out; | |
4704 | } | |
4705 | ||
4706 | data = (BenchData) { | |
4707 | .blk = blk, | |
4708 | .image_size = image_size, | |
4709 | .bufsize = bufsize, | |
4710 | .step = step ?: bufsize, | |
4711 | .nrreq = depth, | |
4712 | .n = count, | |
4713 | .offset = offset, | |
4714 | .write = is_write, | |
4715 | .flush_interval = flush_interval, | |
4716 | .drain_on_flush = drain_on_flush, | |
4717 | }; | |
4718 | printf("Sending %d %s requests, %d bytes each, %d in parallel " | |
4719 | "(starting at offset %" PRId64 ", step size %d)\n", | |
4720 | data.n, data.write ? "write" : "read", data.bufsize, data.nrreq, | |
4721 | data.offset, data.step); | |
4722 | if (flush_interval) { | |
4723 | printf("Sending flush every %d requests\n", flush_interval); | |
4724 | } | |
4725 | ||
4726 | buf_size = data.nrreq * data.bufsize; | |
4727 | data.buf = blk_blockalign(blk, buf_size); | |
4728 | memset(data.buf, pattern, data.nrreq * data.bufsize); | |
4729 | ||
4730 | blk_register_buf(blk, data.buf, buf_size, &error_fatal); | |
4731 | ||
4732 | data.qiov = g_new(QEMUIOVector, data.nrreq); | |
4733 | for (i = 0; i < data.nrreq; i++) { | |
4734 | qemu_iovec_init(&data.qiov[i], 1); | |
4735 | qemu_iovec_add(&data.qiov[i], | |
4736 | data.buf + i * data.bufsize, data.bufsize); | |
4737 | } | |
4738 | ||
4739 | gettimeofday(&t1, NULL); | |
4740 | bench_cb(&data, 0); | |
4741 | ||
4742 | while (data.n > 0) { | |
4743 | main_loop_wait(false); | |
4744 | } | |
4745 | gettimeofday(&t2, NULL); | |
4746 | ||
4747 | printf("Run completed in %3.3f seconds.\n", | |
4748 | (t2.tv_sec - t1.tv_sec) | |
4749 | + ((double)(t2.tv_usec - t1.tv_usec) / 1000000)); | |
4750 | ||
4751 | out: | |
4752 | if (data.buf) { | |
4753 | blk_unregister_buf(blk, data.buf, buf_size); | |
4754 | } | |
4755 | qemu_vfree(data.buf); | |
4756 | blk_unref(blk); | |
4757 | ||
4758 | if (ret) { | |
4759 | return 1; | |
4760 | } | |
4761 | return 0; | |
4762 | } | |
4763 | ||
4764 | enum ImgBitmapAct { | |
4765 | BITMAP_ADD, | |
4766 | BITMAP_REMOVE, | |
4767 | BITMAP_CLEAR, | |
4768 | BITMAP_ENABLE, | |
4769 | BITMAP_DISABLE, | |
4770 | BITMAP_MERGE, | |
4771 | }; | |
4772 | typedef struct ImgBitmapAction { | |
4773 | enum ImgBitmapAct act; | |
4774 | const char *src; /* only used for merge */ | |
4775 | QSIMPLEQ_ENTRY(ImgBitmapAction) next; | |
4776 | } ImgBitmapAction; | |
4777 | ||
4778 | static int img_bitmap(int argc, char **argv) | |
4779 | { | |
4780 | Error *err = NULL; | |
4781 | int c, ret = 1; | |
4782 | QemuOpts *opts = NULL; | |
4783 | const char *fmt = NULL, *src_fmt = NULL, *src_filename = NULL; | |
4784 | const char *filename, *bitmap; | |
4785 | BlockBackend *blk = NULL, *src = NULL; | |
4786 | BlockDriverState *bs = NULL, *src_bs = NULL; | |
4787 | bool image_opts = false; | |
4788 | int64_t granularity = 0; | |
4789 | bool add = false, merge = false; | |
4790 | QSIMPLEQ_HEAD(, ImgBitmapAction) actions; | |
4791 | ImgBitmapAction *act, *act_next; | |
4792 | const char *op; | |
4793 | int inactivate_ret; | |
4794 | ||
4795 | QSIMPLEQ_INIT(&actions); | |
4796 | ||
4797 | for (;;) { | |
4798 | static const struct option long_options[] = { | |
4799 | {"help", no_argument, 0, 'h'}, | |
4800 | {"object", required_argument, 0, OPTION_OBJECT}, | |
4801 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
4802 | {"add", no_argument, 0, OPTION_ADD}, | |
4803 | {"remove", no_argument, 0, OPTION_REMOVE}, | |
4804 | {"clear", no_argument, 0, OPTION_CLEAR}, | |
4805 | {"enable", no_argument, 0, OPTION_ENABLE}, | |
4806 | {"disable", no_argument, 0, OPTION_DISABLE}, | |
4807 | {"merge", required_argument, 0, OPTION_MERGE}, | |
4808 | {"granularity", required_argument, 0, 'g'}, | |
4809 | {"source-file", required_argument, 0, 'b'}, | |
4810 | {"source-format", required_argument, 0, 'F'}, | |
4811 | {0, 0, 0, 0} | |
4812 | }; | |
4813 | c = getopt_long(argc, argv, ":b:f:F:g:h", long_options, NULL); | |
4814 | if (c == -1) { | |
4815 | break; | |
4816 | } | |
4817 | ||
4818 | switch (c) { | |
4819 | case ':': | |
4820 | missing_argument(argv[optind - 1]); | |
4821 | break; | |
4822 | case '?': | |
4823 | unrecognized_option(argv[optind - 1]); | |
4824 | break; | |
4825 | case 'h': | |
4826 | help(); | |
4827 | break; | |
4828 | case 'b': | |
4829 | src_filename = optarg; | |
4830 | break; | |
4831 | case 'f': | |
4832 | fmt = optarg; | |
4833 | break; | |
4834 | case 'F': | |
4835 | src_fmt = optarg; | |
4836 | break; | |
4837 | case 'g': | |
4838 | granularity = cvtnum("granularity", optarg); | |
4839 | if (granularity < 0) { | |
4840 | return 1; | |
4841 | } | |
4842 | break; | |
4843 | case OPTION_ADD: | |
4844 | act = g_new0(ImgBitmapAction, 1); | |
4845 | act->act = BITMAP_ADD; | |
4846 | QSIMPLEQ_INSERT_TAIL(&actions, act, next); | |
4847 | add = true; | |
4848 | break; | |
4849 | case OPTION_REMOVE: | |
4850 | act = g_new0(ImgBitmapAction, 1); | |
4851 | act->act = BITMAP_REMOVE; | |
4852 | QSIMPLEQ_INSERT_TAIL(&actions, act, next); | |
4853 | break; | |
4854 | case OPTION_CLEAR: | |
4855 | act = g_new0(ImgBitmapAction, 1); | |
4856 | act->act = BITMAP_CLEAR; | |
4857 | QSIMPLEQ_INSERT_TAIL(&actions, act, next); | |
4858 | break; | |
4859 | case OPTION_ENABLE: | |
4860 | act = g_new0(ImgBitmapAction, 1); | |
4861 | act->act = BITMAP_ENABLE; | |
4862 | QSIMPLEQ_INSERT_TAIL(&actions, act, next); | |
4863 | break; | |
4864 | case OPTION_DISABLE: | |
4865 | act = g_new0(ImgBitmapAction, 1); | |
4866 | act->act = BITMAP_DISABLE; | |
4867 | QSIMPLEQ_INSERT_TAIL(&actions, act, next); | |
4868 | break; | |
4869 | case OPTION_MERGE: | |
4870 | act = g_new0(ImgBitmapAction, 1); | |
4871 | act->act = BITMAP_MERGE; | |
4872 | act->src = optarg; | |
4873 | QSIMPLEQ_INSERT_TAIL(&actions, act, next); | |
4874 | merge = true; | |
4875 | break; | |
4876 | case OPTION_OBJECT: | |
4877 | user_creatable_process_cmdline(optarg); | |
4878 | break; | |
4879 | case OPTION_IMAGE_OPTS: | |
4880 | image_opts = true; | |
4881 | break; | |
4882 | } | |
4883 | } | |
4884 | ||
4885 | if (QSIMPLEQ_EMPTY(&actions)) { | |
4886 | error_report("Need at least one of --add, --remove, --clear, " | |
4887 | "--enable, --disable, or --merge"); | |
4888 | goto out; | |
4889 | } | |
4890 | ||
4891 | if (granularity && !add) { | |
4892 | error_report("granularity only supported with --add"); | |
4893 | goto out; | |
4894 | } | |
4895 | if (src_fmt && !src_filename) { | |
4896 | error_report("-F only supported with -b"); | |
4897 | goto out; | |
4898 | } | |
4899 | if (src_filename && !merge) { | |
4900 | error_report("Merge bitmap source file only supported with " | |
4901 | "--merge"); | |
4902 | goto out; | |
4903 | } | |
4904 | ||
4905 | if (optind != argc - 2) { | |
4906 | error_report("Expecting filename and bitmap name"); | |
4907 | goto out; | |
4908 | } | |
4909 | ||
4910 | filename = argv[optind]; | |
4911 | bitmap = argv[optind + 1]; | |
4912 | ||
4913 | /* | |
4914 | * No need to open backing chains; we will be manipulating bitmaps | |
4915 | * directly in this image without reference to image contents. | |
4916 | */ | |
4917 | blk = img_open(image_opts, filename, fmt, BDRV_O_RDWR | BDRV_O_NO_BACKING, | |
4918 | false, false, false); | |
4919 | if (!blk) { | |
4920 | goto out; | |
4921 | } | |
4922 | bs = blk_bs(blk); | |
4923 | if (src_filename) { | |
4924 | src = img_open(false, src_filename, src_fmt, BDRV_O_NO_BACKING, | |
4925 | false, false, false); | |
4926 | if (!src) { | |
4927 | goto out; | |
4928 | } | |
4929 | src_bs = blk_bs(src); | |
4930 | } else { | |
4931 | src_bs = bs; | |
4932 | } | |
4933 | ||
4934 | QSIMPLEQ_FOREACH_SAFE(act, &actions, next, act_next) { | |
4935 | switch (act->act) { | |
4936 | case BITMAP_ADD: | |
4937 | qmp_block_dirty_bitmap_add(bs->node_name, bitmap, | |
4938 | !!granularity, granularity, true, true, | |
4939 | false, false, &err); | |
4940 | op = "add"; | |
4941 | break; | |
4942 | case BITMAP_REMOVE: | |
4943 | qmp_block_dirty_bitmap_remove(bs->node_name, bitmap, &err); | |
4944 | op = "remove"; | |
4945 | break; | |
4946 | case BITMAP_CLEAR: | |
4947 | qmp_block_dirty_bitmap_clear(bs->node_name, bitmap, &err); | |
4948 | op = "clear"; | |
4949 | break; | |
4950 | case BITMAP_ENABLE: | |
4951 | qmp_block_dirty_bitmap_enable(bs->node_name, bitmap, &err); | |
4952 | op = "enable"; | |
4953 | break; | |
4954 | case BITMAP_DISABLE: | |
4955 | qmp_block_dirty_bitmap_disable(bs->node_name, bitmap, &err); | |
4956 | op = "disable"; | |
4957 | break; | |
4958 | case BITMAP_MERGE: | |
4959 | do_dirty_bitmap_merge(bs->node_name, bitmap, src_bs->node_name, | |
4960 | act->src, &err); | |
4961 | op = "merge"; | |
4962 | break; | |
4963 | default: | |
4964 | g_assert_not_reached(); | |
4965 | } | |
4966 | ||
4967 | if (err) { | |
4968 | error_reportf_err(err, "Operation %s on bitmap %s failed: ", | |
4969 | op, bitmap); | |
4970 | goto out; | |
4971 | } | |
4972 | g_free(act); | |
4973 | } | |
4974 | ||
4975 | ret = 0; | |
4976 | ||
4977 | out: | |
4978 | /* | |
4979 | * Manually inactivate the images first because this way we can know whether | |
4980 | * an error occurred. blk_unref() doesn't tell us about failures. | |
4981 | */ | |
4982 | inactivate_ret = bdrv_inactivate_all(); | |
4983 | if (inactivate_ret < 0) { | |
4984 | error_report("Error while closing the image: %s", strerror(-inactivate_ret)); | |
4985 | ret = 1; | |
4986 | } | |
4987 | ||
4988 | blk_unref(src); | |
4989 | blk_unref(blk); | |
4990 | qemu_opts_del(opts); | |
4991 | return ret; | |
4992 | } | |
4993 | ||
4994 | #define C_BS 01 | |
4995 | #define C_COUNT 02 | |
4996 | #define C_IF 04 | |
4997 | #define C_OF 010 | |
4998 | #define C_SKIP 020 | |
4999 | ||
5000 | struct DdInfo { | |
5001 | unsigned int flags; | |
5002 | int64_t count; | |
5003 | }; | |
5004 | ||
5005 | struct DdIo { | |
5006 | int bsz; /* Block size */ | |
5007 | char *filename; | |
5008 | uint8_t *buf; | |
5009 | int64_t offset; | |
5010 | }; | |
5011 | ||
5012 | struct DdOpts { | |
5013 | const char *name; | |
5014 | int (*f)(const char *, struct DdIo *, struct DdIo *, struct DdInfo *); | |
5015 | unsigned int flag; | |
5016 | }; | |
5017 | ||
5018 | static int img_dd_bs(const char *arg, | |
5019 | struct DdIo *in, struct DdIo *out, | |
5020 | struct DdInfo *dd) | |
5021 | { | |
5022 | int64_t res; | |
5023 | ||
5024 | res = cvtnum_full("bs", arg, 1, INT_MAX); | |
5025 | ||
5026 | if (res < 0) { | |
5027 | return 1; | |
5028 | } | |
5029 | in->bsz = out->bsz = res; | |
5030 | ||
5031 | return 0; | |
5032 | } | |
5033 | ||
5034 | static int img_dd_count(const char *arg, | |
5035 | struct DdIo *in, struct DdIo *out, | |
5036 | struct DdInfo *dd) | |
5037 | { | |
5038 | dd->count = cvtnum("count", arg); | |
5039 | ||
5040 | if (dd->count < 0) { | |
5041 | return 1; | |
5042 | } | |
5043 | ||
5044 | return 0; | |
5045 | } | |
5046 | ||
5047 | static int img_dd_if(const char *arg, | |
5048 | struct DdIo *in, struct DdIo *out, | |
5049 | struct DdInfo *dd) | |
5050 | { | |
5051 | in->filename = g_strdup(arg); | |
5052 | ||
5053 | return 0; | |
5054 | } | |
5055 | ||
5056 | static int img_dd_of(const char *arg, | |
5057 | struct DdIo *in, struct DdIo *out, | |
5058 | struct DdInfo *dd) | |
5059 | { | |
5060 | out->filename = g_strdup(arg); | |
5061 | ||
5062 | return 0; | |
5063 | } | |
5064 | ||
5065 | static int img_dd_skip(const char *arg, | |
5066 | struct DdIo *in, struct DdIo *out, | |
5067 | struct DdInfo *dd) | |
5068 | { | |
5069 | in->offset = cvtnum("skip", arg); | |
5070 | ||
5071 | if (in->offset < 0) { | |
5072 | return 1; | |
5073 | } | |
5074 | ||
5075 | return 0; | |
5076 | } | |
5077 | ||
5078 | static int img_dd(int argc, char **argv) | |
5079 | { | |
5080 | int ret = 0; | |
5081 | char *arg = NULL; | |
5082 | char *tmp; | |
5083 | BlockDriver *drv = NULL, *proto_drv = NULL; | |
5084 | BlockBackend *blk1 = NULL, *blk2 = NULL; | |
5085 | QemuOpts *opts = NULL; | |
5086 | QemuOptsList *create_opts = NULL; | |
5087 | Error *local_err = NULL; | |
5088 | bool image_opts = false; | |
5089 | int c, i; | |
5090 | const char *out_fmt = "raw"; | |
5091 | const char *fmt = NULL; | |
5092 | int64_t size = 0; | |
5093 | int64_t out_pos, in_pos; | |
5094 | bool force_share = false; | |
5095 | struct DdInfo dd = { | |
5096 | .flags = 0, | |
5097 | .count = 0, | |
5098 | }; | |
5099 | struct DdIo in = { | |
5100 | .bsz = 512, /* Block size is by default 512 bytes */ | |
5101 | .filename = NULL, | |
5102 | .buf = NULL, | |
5103 | .offset = 0 | |
5104 | }; | |
5105 | struct DdIo out = { | |
5106 | .bsz = 512, | |
5107 | .filename = NULL, | |
5108 | .buf = NULL, | |
5109 | .offset = 0 | |
5110 | }; | |
5111 | ||
5112 | const struct DdOpts options[] = { | |
5113 | { "bs", img_dd_bs, C_BS }, | |
5114 | { "count", img_dd_count, C_COUNT }, | |
5115 | { "if", img_dd_if, C_IF }, | |
5116 | { "of", img_dd_of, C_OF }, | |
5117 | { "skip", img_dd_skip, C_SKIP }, | |
5118 | { NULL, NULL, 0 } | |
5119 | }; | |
5120 | const struct option long_options[] = { | |
5121 | { "help", no_argument, 0, 'h'}, | |
5122 | { "object", required_argument, 0, OPTION_OBJECT}, | |
5123 | { "image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
5124 | { "force-share", no_argument, 0, 'U'}, | |
5125 | { 0, 0, 0, 0 } | |
5126 | }; | |
5127 | ||
5128 | while ((c = getopt_long(argc, argv, ":hf:O:U", long_options, NULL))) { | |
5129 | if (c == EOF) { | |
5130 | break; | |
5131 | } | |
5132 | switch (c) { | |
5133 | case 'O': | |
5134 | out_fmt = optarg; | |
5135 | break; | |
5136 | case 'f': | |
5137 | fmt = optarg; | |
5138 | break; | |
5139 | case ':': | |
5140 | missing_argument(argv[optind - 1]); | |
5141 | break; | |
5142 | case '?': | |
5143 | unrecognized_option(argv[optind - 1]); | |
5144 | break; | |
5145 | case 'h': | |
5146 | help(); | |
5147 | break; | |
5148 | case 'U': | |
5149 | force_share = true; | |
5150 | break; | |
5151 | case OPTION_OBJECT: | |
5152 | user_creatable_process_cmdline(optarg); | |
5153 | break; | |
5154 | case OPTION_IMAGE_OPTS: | |
5155 | image_opts = true; | |
5156 | break; | |
5157 | } | |
5158 | } | |
5159 | ||
5160 | for (i = optind; i < argc; i++) { | |
5161 | int j; | |
5162 | arg = g_strdup(argv[i]); | |
5163 | ||
5164 | tmp = strchr(arg, '='); | |
5165 | if (tmp == NULL) { | |
5166 | error_report("unrecognized operand %s", arg); | |
5167 | ret = -1; | |
5168 | goto out; | |
5169 | } | |
5170 | ||
5171 | *tmp++ = '\0'; | |
5172 | ||
5173 | for (j = 0; options[j].name != NULL; j++) { | |
5174 | if (!strcmp(arg, options[j].name)) { | |
5175 | break; | |
5176 | } | |
5177 | } | |
5178 | if (options[j].name == NULL) { | |
5179 | error_report("unrecognized operand %s", arg); | |
5180 | ret = -1; | |
5181 | goto out; | |
5182 | } | |
5183 | ||
5184 | if (options[j].f(tmp, &in, &out, &dd) != 0) { | |
5185 | ret = -1; | |
5186 | goto out; | |
5187 | } | |
5188 | dd.flags |= options[j].flag; | |
5189 | g_free(arg); | |
5190 | arg = NULL; | |
5191 | } | |
5192 | ||
5193 | if (!(dd.flags & C_IF && dd.flags & C_OF)) { | |
5194 | error_report("Must specify both input and output files"); | |
5195 | ret = -1; | |
5196 | goto out; | |
5197 | } | |
5198 | ||
5199 | blk1 = img_open(image_opts, in.filename, fmt, 0, false, false, | |
5200 | force_share); | |
5201 | ||
5202 | if (!blk1) { | |
5203 | ret = -1; | |
5204 | goto out; | |
5205 | } | |
5206 | ||
5207 | drv = bdrv_find_format(out_fmt); | |
5208 | if (!drv) { | |
5209 | error_report("Unknown file format"); | |
5210 | ret = -1; | |
5211 | goto out; | |
5212 | } | |
5213 | proto_drv = bdrv_find_protocol(out.filename, true, &local_err); | |
5214 | ||
5215 | if (!proto_drv) { | |
5216 | error_report_err(local_err); | |
5217 | ret = -1; | |
5218 | goto out; | |
5219 | } | |
5220 | if (!drv->create_opts) { | |
5221 | error_report("Format driver '%s' does not support image creation", | |
5222 | drv->format_name); | |
5223 | ret = -1; | |
5224 | goto out; | |
5225 | } | |
5226 | if (!proto_drv->create_opts) { | |
5227 | error_report("Protocol driver '%s' does not support image creation", | |
5228 | proto_drv->format_name); | |
5229 | ret = -1; | |
5230 | goto out; | |
5231 | } | |
5232 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
5233 | create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); | |
5234 | ||
5235 | opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); | |
5236 | ||
5237 | size = blk_getlength(blk1); | |
5238 | if (size < 0) { | |
5239 | error_report("Failed to get size for '%s'", in.filename); | |
5240 | ret = -1; | |
5241 | goto out; | |
5242 | } | |
5243 | ||
5244 | if (dd.flags & C_COUNT && dd.count <= INT64_MAX / in.bsz && | |
5245 | dd.count * in.bsz < size) { | |
5246 | size = dd.count * in.bsz; | |
5247 | } | |
5248 | ||
5249 | /* Overflow means the specified offset is beyond input image's size */ | |
5250 | if (dd.flags & C_SKIP && (in.offset > INT64_MAX / in.bsz || | |
5251 | size < in.bsz * in.offset)) { | |
5252 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, 0, &error_abort); | |
5253 | } else { | |
5254 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, | |
5255 | size - in.bsz * in.offset, &error_abort); | |
5256 | } | |
5257 | ||
5258 | ret = bdrv_create(drv, out.filename, opts, &local_err); | |
5259 | if (ret < 0) { | |
5260 | error_reportf_err(local_err, | |
5261 | "%s: error while creating output image: ", | |
5262 | out.filename); | |
5263 | ret = -1; | |
5264 | goto out; | |
5265 | } | |
5266 | ||
5267 | /* TODO, we can't honour --image-opts for the target, | |
5268 | * since it needs to be given in a format compatible | |
5269 | * with the bdrv_create() call above which does not | |
5270 | * support image-opts style. | |
5271 | */ | |
5272 | blk2 = img_open_file(out.filename, NULL, out_fmt, BDRV_O_RDWR, | |
5273 | false, false, false); | |
5274 | ||
5275 | if (!blk2) { | |
5276 | ret = -1; | |
5277 | goto out; | |
5278 | } | |
5279 | ||
5280 | if (dd.flags & C_SKIP && (in.offset > INT64_MAX / in.bsz || | |
5281 | size < in.offset * in.bsz)) { | |
5282 | /* We give a warning if the skip option is bigger than the input | |
5283 | * size and create an empty output disk image (i.e. like dd(1)). | |
5284 | */ | |
5285 | error_report("%s: cannot skip to specified offset", in.filename); | |
5286 | in_pos = size; | |
5287 | } else { | |
5288 | in_pos = in.offset * in.bsz; | |
5289 | } | |
5290 | ||
5291 | in.buf = g_new(uint8_t, in.bsz); | |
5292 | ||
5293 | for (out_pos = 0; in_pos < size; ) { | |
5294 | int bytes = (in_pos + in.bsz > size) ? size - in_pos : in.bsz; | |
5295 | ||
5296 | ret = blk_pread(blk1, in_pos, bytes, in.buf, 0); | |
5297 | if (ret < 0) { | |
5298 | error_report("error while reading from input image file: %s", | |
5299 | strerror(-ret)); | |
5300 | goto out; | |
5301 | } | |
5302 | in_pos += bytes; | |
5303 | ||
5304 | ret = blk_pwrite(blk2, out_pos, bytes, in.buf, 0); | |
5305 | if (ret < 0) { | |
5306 | error_report("error while writing to output image file: %s", | |
5307 | strerror(-ret)); | |
5308 | goto out; | |
5309 | } | |
5310 | out_pos += bytes; | |
5311 | } | |
5312 | ||
5313 | out: | |
5314 | g_free(arg); | |
5315 | qemu_opts_del(opts); | |
5316 | qemu_opts_free(create_opts); | |
5317 | blk_unref(blk1); | |
5318 | blk_unref(blk2); | |
5319 | g_free(in.filename); | |
5320 | g_free(out.filename); | |
5321 | g_free(in.buf); | |
5322 | g_free(out.buf); | |
5323 | ||
5324 | if (ret) { | |
5325 | return 1; | |
5326 | } | |
5327 | return 0; | |
5328 | } | |
5329 | ||
5330 | static void dump_json_block_measure_info(BlockMeasureInfo *info) | |
5331 | { | |
5332 | GString *str; | |
5333 | QObject *obj; | |
5334 | Visitor *v = qobject_output_visitor_new(&obj); | |
5335 | ||
5336 | visit_type_BlockMeasureInfo(v, NULL, &info, &error_abort); | |
5337 | visit_complete(v, &obj); | |
5338 | str = qobject_to_json_pretty(obj, true); | |
5339 | assert(str != NULL); | |
5340 | printf("%s\n", str->str); | |
5341 | qobject_unref(obj); | |
5342 | visit_free(v); | |
5343 | g_string_free(str, true); | |
5344 | } | |
5345 | ||
5346 | static int img_measure(int argc, char **argv) | |
5347 | { | |
5348 | static const struct option long_options[] = { | |
5349 | {"help", no_argument, 0, 'h'}, | |
5350 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
5351 | {"object", required_argument, 0, OPTION_OBJECT}, | |
5352 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
5353 | {"size", required_argument, 0, OPTION_SIZE}, | |
5354 | {"force-share", no_argument, 0, 'U'}, | |
5355 | {0, 0, 0, 0} | |
5356 | }; | |
5357 | OutputFormat output_format = OFORMAT_HUMAN; | |
5358 | BlockBackend *in_blk = NULL; | |
5359 | BlockDriver *drv; | |
5360 | const char *filename = NULL; | |
5361 | const char *fmt = NULL; | |
5362 | const char *out_fmt = "raw"; | |
5363 | char *options = NULL; | |
5364 | char *snapshot_name = NULL; | |
5365 | bool force_share = false; | |
5366 | QemuOpts *opts = NULL; | |
5367 | QemuOpts *object_opts = NULL; | |
5368 | QemuOpts *sn_opts = NULL; | |
5369 | QemuOptsList *create_opts = NULL; | |
5370 | bool image_opts = false; | |
5371 | uint64_t img_size = UINT64_MAX; | |
5372 | BlockMeasureInfo *info = NULL; | |
5373 | Error *local_err = NULL; | |
5374 | int ret = 1; | |
5375 | int c; | |
5376 | ||
5377 | while ((c = getopt_long(argc, argv, "hf:O:o:l:U", | |
5378 | long_options, NULL)) != -1) { | |
5379 | switch (c) { | |
5380 | case '?': | |
5381 | case 'h': | |
5382 | help(); | |
5383 | break; | |
5384 | case 'f': | |
5385 | fmt = optarg; | |
5386 | break; | |
5387 | case 'O': | |
5388 | out_fmt = optarg; | |
5389 | break; | |
5390 | case 'o': | |
5391 | if (accumulate_options(&options, optarg) < 0) { | |
5392 | goto out; | |
5393 | } | |
5394 | break; | |
5395 | case 'l': | |
5396 | if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { | |
5397 | sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, | |
5398 | optarg, false); | |
5399 | if (!sn_opts) { | |
5400 | error_report("Failed in parsing snapshot param '%s'", | |
5401 | optarg); | |
5402 | goto out; | |
5403 | } | |
5404 | } else { | |
5405 | snapshot_name = optarg; | |
5406 | } | |
5407 | break; | |
5408 | case 'U': | |
5409 | force_share = true; | |
5410 | break; | |
5411 | case OPTION_OBJECT: | |
5412 | user_creatable_process_cmdline(optarg); | |
5413 | break; | |
5414 | case OPTION_IMAGE_OPTS: | |
5415 | image_opts = true; | |
5416 | break; | |
5417 | case OPTION_OUTPUT: | |
5418 | if (!strcmp(optarg, "json")) { | |
5419 | output_format = OFORMAT_JSON; | |
5420 | } else if (!strcmp(optarg, "human")) { | |
5421 | output_format = OFORMAT_HUMAN; | |
5422 | } else { | |
5423 | error_report("--output must be used with human or json " | |
5424 | "as argument."); | |
5425 | goto out; | |
5426 | } | |
5427 | break; | |
5428 | case OPTION_SIZE: | |
5429 | { | |
5430 | int64_t sval; | |
5431 | ||
5432 | sval = cvtnum("image size", optarg); | |
5433 | if (sval < 0) { | |
5434 | goto out; | |
5435 | } | |
5436 | img_size = (uint64_t)sval; | |
5437 | } | |
5438 | break; | |
5439 | } | |
5440 | } | |
5441 | ||
5442 | if (argc - optind > 1) { | |
5443 | error_report("At most one filename argument is allowed."); | |
5444 | goto out; | |
5445 | } else if (argc - optind == 1) { | |
5446 | filename = argv[optind]; | |
5447 | } | |
5448 | ||
5449 | if (!filename && (image_opts || fmt || snapshot_name || sn_opts)) { | |
5450 | error_report("--image-opts, -f, and -l require a filename argument."); | |
5451 | goto out; | |
5452 | } | |
5453 | if (filename && img_size != UINT64_MAX) { | |
5454 | error_report("--size N cannot be used together with a filename."); | |
5455 | goto out; | |
5456 | } | |
5457 | if (!filename && img_size == UINT64_MAX) { | |
5458 | error_report("Either --size N or one filename must be specified."); | |
5459 | goto out; | |
5460 | } | |
5461 | ||
5462 | if (filename) { | |
5463 | in_blk = img_open(image_opts, filename, fmt, 0, | |
5464 | false, false, force_share); | |
5465 | if (!in_blk) { | |
5466 | goto out; | |
5467 | } | |
5468 | ||
5469 | if (sn_opts) { | |
5470 | bdrv_snapshot_load_tmp(blk_bs(in_blk), | |
5471 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), | |
5472 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), | |
5473 | &local_err); | |
5474 | } else if (snapshot_name != NULL) { | |
5475 | bdrv_snapshot_load_tmp_by_id_or_name(blk_bs(in_blk), | |
5476 | snapshot_name, &local_err); | |
5477 | } | |
5478 | if (local_err) { | |
5479 | error_reportf_err(local_err, "Failed to load snapshot: "); | |
5480 | goto out; | |
5481 | } | |
5482 | } | |
5483 | ||
5484 | drv = bdrv_find_format(out_fmt); | |
5485 | if (!drv) { | |
5486 | error_report("Unknown file format '%s'", out_fmt); | |
5487 | goto out; | |
5488 | } | |
5489 | if (!drv->create_opts) { | |
5490 | error_report("Format driver '%s' does not support image creation", | |
5491 | drv->format_name); | |
5492 | goto out; | |
5493 | } | |
5494 | ||
5495 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
5496 | create_opts = qemu_opts_append(create_opts, bdrv_file.create_opts); | |
5497 | opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); | |
5498 | if (options) { | |
5499 | if (!qemu_opts_do_parse(opts, options, NULL, &local_err)) { | |
5500 | error_report_err(local_err); | |
5501 | error_report("Invalid options for file format '%s'", out_fmt); | |
5502 | goto out; | |
5503 | } | |
5504 | } | |
5505 | if (img_size != UINT64_MAX) { | |
5506 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, img_size, &error_abort); | |
5507 | } | |
5508 | ||
5509 | info = bdrv_measure(drv, opts, in_blk ? blk_bs(in_blk) : NULL, &local_err); | |
5510 | if (local_err) { | |
5511 | error_report_err(local_err); | |
5512 | goto out; | |
5513 | } | |
5514 | ||
5515 | if (output_format == OFORMAT_HUMAN) { | |
5516 | printf("required size: %" PRIu64 "\n", info->required); | |
5517 | printf("fully allocated size: %" PRIu64 "\n", info->fully_allocated); | |
5518 | if (info->has_bitmaps) { | |
5519 | printf("bitmaps size: %" PRIu64 "\n", info->bitmaps); | |
5520 | } | |
5521 | } else { | |
5522 | dump_json_block_measure_info(info); | |
5523 | } | |
5524 | ||
5525 | ret = 0; | |
5526 | ||
5527 | out: | |
5528 | qapi_free_BlockMeasureInfo(info); | |
5529 | qemu_opts_del(object_opts); | |
5530 | qemu_opts_del(opts); | |
5531 | qemu_opts_del(sn_opts); | |
5532 | qemu_opts_free(create_opts); | |
5533 | g_free(options); | |
5534 | blk_unref(in_blk); | |
5535 | return ret; | |
5536 | } | |
5537 | ||
5538 | static const img_cmd_t img_cmds[] = { | |
5539 | #define DEF(option, callback, arg_string) \ | |
5540 | { option, callback }, | |
5541 | #include "qemu-img-cmds.h" | |
5542 | #undef DEF | |
5543 | { NULL, NULL, }, | |
5544 | }; | |
5545 | ||
5546 | int main(int argc, char **argv) | |
5547 | { | |
5548 | const img_cmd_t *cmd; | |
5549 | const char *cmdname; | |
5550 | int c; | |
5551 | static const struct option long_options[] = { | |
5552 | {"help", no_argument, 0, 'h'}, | |
5553 | {"version", no_argument, 0, 'V'}, | |
5554 | {"trace", required_argument, NULL, 'T'}, | |
5555 | {0, 0, 0, 0} | |
5556 | }; | |
5557 | ||
5558 | #ifdef CONFIG_POSIX | |
5559 | signal(SIGPIPE, SIG_IGN); | |
5560 | #endif | |
5561 | ||
5562 | socket_init(); | |
5563 | error_init(argv[0]); | |
5564 | module_call_init(MODULE_INIT_TRACE); | |
5565 | qemu_init_exec_dir(argv[0]); | |
5566 | ||
5567 | qemu_init_main_loop(&error_fatal); | |
5568 | ||
5569 | qcrypto_init(&error_fatal); | |
5570 | ||
5571 | module_call_init(MODULE_INIT_QOM); | |
5572 | bdrv_init(); | |
5573 | if (argc < 2) { | |
5574 | error_exit("Not enough arguments"); | |
5575 | } | |
5576 | ||
5577 | qemu_add_opts(&qemu_source_opts); | |
5578 | qemu_add_opts(&qemu_trace_opts); | |
5579 | ||
5580 | while ((c = getopt_long(argc, argv, "+:hVT:", long_options, NULL)) != -1) { | |
5581 | switch (c) { | |
5582 | case ':': | |
5583 | missing_argument(argv[optind - 1]); | |
5584 | return 0; | |
5585 | case '?': | |
5586 | unrecognized_option(argv[optind - 1]); | |
5587 | return 0; | |
5588 | case 'h': | |
5589 | help(); | |
5590 | return 0; | |
5591 | case 'V': | |
5592 | printf(QEMU_IMG_VERSION); | |
5593 | return 0; | |
5594 | case 'T': | |
5595 | trace_opt_parse(optarg); | |
5596 | break; | |
5597 | } | |
5598 | } | |
5599 | ||
5600 | cmdname = argv[optind]; | |
5601 | ||
5602 | /* reset getopt_long scanning */ | |
5603 | argc -= optind; | |
5604 | if (argc < 1) { | |
5605 | return 0; | |
5606 | } | |
5607 | argv += optind; | |
5608 | qemu_reset_optind(); | |
5609 | ||
5610 | if (!trace_init_backends()) { | |
5611 | exit(1); | |
5612 | } | |
5613 | trace_init_file(); | |
5614 | qemu_set_log(LOG_TRACE, &error_fatal); | |
5615 | ||
5616 | /* find the command */ | |
5617 | for (cmd = img_cmds; cmd->name != NULL; cmd++) { | |
5618 | if (!strcmp(cmdname, cmd->name)) { | |
5619 | return cmd->handler(argc, argv); | |
5620 | } | |
5621 | } | |
5622 | ||
5623 | /* not found */ | |
5624 | error_exit("Command not found: %s", cmdname); | |
5625 | } |