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1 | /* | |
2 | * QEMU disk image utility | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | ||
25 | #include "qemu/osdep.h" | |
26 | #include <getopt.h> | |
27 | ||
28 | #include "qemu-common.h" | |
29 | #include "qemu-version.h" | |
30 | #include "qapi/error.h" | |
31 | #include "qapi/qapi-commands-block-core.h" | |
32 | #include "qapi/qapi-visit-block-core.h" | |
33 | #include "qapi/qobject-output-visitor.h" | |
34 | #include "qapi/qmp/qjson.h" | |
35 | #include "qapi/qmp/qdict.h" | |
36 | #include "qapi/qmp/qstring.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 "qom/object_interfaces.h" | |
47 | #include "sysemu/block-backend.h" | |
48 | #include "block/block_int.h" | |
49 | #include "block/blockjob.h" | |
50 | #include "block/qapi.h" | |
51 | #include "crypto/init.h" | |
52 | #include "trace/control.h" | |
53 | #include "qemu/throttle.h" | |
54 | #include "block/throttle-groups.h" | |
55 | ||
56 | #define QEMU_IMG_VERSION "qemu-img version " QEMU_FULL_VERSION \ | |
57 | "\n" QEMU_COPYRIGHT "\n" | |
58 | ||
59 | typedef struct img_cmd_t { | |
60 | const char *name; | |
61 | int (*handler)(int argc, char **argv); | |
62 | } img_cmd_t; | |
63 | ||
64 | enum { | |
65 | OPTION_OUTPUT = 256, | |
66 | OPTION_BACKING_CHAIN = 257, | |
67 | OPTION_OBJECT = 258, | |
68 | OPTION_IMAGE_OPTS = 259, | |
69 | OPTION_PATTERN = 260, | |
70 | OPTION_FLUSH_INTERVAL = 261, | |
71 | OPTION_NO_DRAIN = 262, | |
72 | OPTION_TARGET_IMAGE_OPTS = 263, | |
73 | OPTION_SIZE = 264, | |
74 | OPTION_PREALLOCATION = 265, | |
75 | OPTION_SHRINK = 266, | |
76 | OPTION_SALVAGE = 267, | |
77 | OPTION_TARGET_IS_ZERO = 268, | |
78 | OPTION_ADD = 269, | |
79 | OPTION_REMOVE = 270, | |
80 | OPTION_CLEAR = 271, | |
81 | OPTION_ENABLE = 272, | |
82 | OPTION_DISABLE = 273, | |
83 | OPTION_MERGE = 274, | |
84 | OPTION_BITMAPS = 275, | |
85 | OPTION_FORCE = 276, | |
86 | }; | |
87 | ||
88 | typedef enum OutputFormat { | |
89 | OFORMAT_JSON, | |
90 | OFORMAT_HUMAN, | |
91 | } OutputFormat; | |
92 | ||
93 | /* Default to cache=writeback as data integrity is not important for qemu-img */ | |
94 | #define BDRV_DEFAULT_CACHE "writeback" | |
95 | ||
96 | static void format_print(void *opaque, const char *name) | |
97 | { | |
98 | printf(" %s", name); | |
99 | } | |
100 | ||
101 | static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...) | |
102 | { | |
103 | va_list ap; | |
104 | ||
105 | va_start(ap, fmt); | |
106 | error_vreport(fmt, ap); | |
107 | va_end(ap); | |
108 | ||
109 | error_printf("Try 'qemu-img --help' for more information\n"); | |
110 | exit(EXIT_FAILURE); | |
111 | } | |
112 | ||
113 | static void QEMU_NORETURN missing_argument(const char *option) | |
114 | { | |
115 | error_exit("missing argument for option '%s'", option); | |
116 | } | |
117 | ||
118 | static void QEMU_NORETURN unrecognized_option(const char *option) | |
119 | { | |
120 | error_exit("unrecognized option '%s'", option); | |
121 | } | |
122 | ||
123 | /* Please keep in synch with docs/tools/qemu-img.rst */ | |
124 | static void QEMU_NORETURN help(void) | |
125 | { | |
126 | const char *help_msg = | |
127 | QEMU_IMG_VERSION | |
128 | "usage: qemu-img [standard options] command [command options]\n" | |
129 | "QEMU disk image utility\n" | |
130 | "\n" | |
131 | " '-h', '--help' display this help and exit\n" | |
132 | " '-V', '--version' output version information and exit\n" | |
133 | " '-T', '--trace' [[enable=]<pattern>][,events=<file>][,file=<file>]\n" | |
134 | " specify tracing options\n" | |
135 | "\n" | |
136 | "Command syntax:\n" | |
137 | #define DEF(option, callback, arg_string) \ | |
138 | " " arg_string "\n" | |
139 | #include "qemu-img-cmds.h" | |
140 | #undef DEF | |
141 | "\n" | |
142 | "Command parameters:\n" | |
143 | " 'filename' is a disk image filename\n" | |
144 | " 'objectdef' is a QEMU user creatable object definition. See the qemu(1)\n" | |
145 | " manual page for a description of the object properties. The most common\n" | |
146 | " object type is a 'secret', which is used to supply passwords and/or\n" | |
147 | " encryption keys.\n" | |
148 | " 'fmt' is the disk image format. It is guessed automatically in most cases\n" | |
149 | " 'cache' is the cache mode used to write the output disk image, the valid\n" | |
150 | " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n" | |
151 | " 'directsync' and 'unsafe' (default for convert)\n" | |
152 | " 'src_cache' is the cache mode used to read input disk images, the valid\n" | |
153 | " options are the same as for the 'cache' option\n" | |
154 | " 'size' is the disk image size in bytes. Optional suffixes\n" | |
155 | " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n" | |
156 | " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n" | |
157 | " supported. 'b' is ignored.\n" | |
158 | " 'output_filename' is the destination disk image filename\n" | |
159 | " 'output_fmt' is the destination format\n" | |
160 | " 'options' is a comma separated list of format specific options in a\n" | |
161 | " name=value format. Use -o ? for an overview of the options supported by the\n" | |
162 | " used format\n" | |
163 | " 'snapshot_param' is param used for internal snapshot, format\n" | |
164 | " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" | |
165 | " '[ID_OR_NAME]'\n" | |
166 | " '-c' indicates that target image must be compressed (qcow format only)\n" | |
167 | " '-u' allows unsafe backing chains. For rebasing, it is assumed that old and\n" | |
168 | " new backing file match exactly. The image doesn't need a working\n" | |
169 | " backing file before rebasing in this case (useful for renaming the\n" | |
170 | " backing file). For image creation, allow creating without attempting\n" | |
171 | " to open the backing file.\n" | |
172 | " '-h' with or without a command shows this help and lists the supported formats\n" | |
173 | " '-p' show progress of command (only certain commands)\n" | |
174 | " '-q' use Quiet mode - do not print any output (except errors)\n" | |
175 | " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n" | |
176 | " contain only zeros for qemu-img to create a sparse image during\n" | |
177 | " conversion. If the number of bytes is 0, the source will not be scanned for\n" | |
178 | " unallocated or zero sectors, and the destination image will always be\n" | |
179 | " fully allocated\n" | |
180 | " '--output' takes the format in which the output must be done (human or json)\n" | |
181 | " '-n' skips the target volume creation (useful if the volume is created\n" | |
182 | " prior to running qemu-img)\n" | |
183 | "\n" | |
184 | "Parameters to bitmap subcommand:\n" | |
185 | " 'bitmap' is the name of the bitmap to manipulate, through one or more\n" | |
186 | " actions from '--add', '--remove', '--clear', '--enable', '--disable',\n" | |
187 | " or '--merge source'\n" | |
188 | " '-g granularity' sets the granularity for '--add' actions\n" | |
189 | " '-b source' and '-F src_fmt' tell '--merge' actions to find the source\n" | |
190 | " bitmaps from an alternative file\n" | |
191 | "\n" | |
192 | "Parameters to check subcommand:\n" | |
193 | " '-r' tries to repair any inconsistencies that are found during the check.\n" | |
194 | " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n" | |
195 | " kinds of errors, with a higher risk of choosing the wrong fix or\n" | |
196 | " hiding corruption that has already occurred.\n" | |
197 | "\n" | |
198 | "Parameters to convert subcommand:\n" | |
199 | " '--bitmaps' copies all top-level persistent bitmaps to destination\n" | |
200 | " '-m' specifies how many coroutines work in parallel during the convert\n" | |
201 | " process (defaults to 8)\n" | |
202 | " '-W' allow to write to the target out of order rather than sequential\n" | |
203 | "\n" | |
204 | "Parameters to snapshot subcommand:\n" | |
205 | " 'snapshot' is the name of the snapshot to create, apply or delete\n" | |
206 | " '-a' applies a snapshot (revert disk to saved state)\n" | |
207 | " '-c' creates a snapshot\n" | |
208 | " '-d' deletes a snapshot\n" | |
209 | " '-l' lists all snapshots in the given image\n" | |
210 | "\n" | |
211 | "Parameters to compare subcommand:\n" | |
212 | " '-f' first image format\n" | |
213 | " '-F' second image format\n" | |
214 | " '-s' run in Strict mode - fail on different image size or sector allocation\n" | |
215 | "\n" | |
216 | "Parameters to dd subcommand:\n" | |
217 | " 'bs=BYTES' read and write up to BYTES bytes at a time " | |
218 | "(default: 512)\n" | |
219 | " 'count=N' copy only N input blocks\n" | |
220 | " 'if=FILE' read from FILE\n" | |
221 | " 'of=FILE' write to FILE\n" | |
222 | " 'skip=N' skip N bs-sized blocks at the start of input\n"; | |
223 | ||
224 | printf("%s\nSupported formats:", help_msg); | |
225 | bdrv_iterate_format(format_print, NULL, false); | |
226 | printf("\n\n" QEMU_HELP_BOTTOM "\n"); | |
227 | exit(EXIT_SUCCESS); | |
228 | } | |
229 | ||
230 | static QemuOptsList qemu_object_opts = { | |
231 | .name = "object", | |
232 | .implied_opt_name = "qom-type", | |
233 | .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), | |
234 | .desc = { | |
235 | { } | |
236 | }, | |
237 | }; | |
238 | ||
239 | static bool qemu_img_object_print_help(const char *type, QemuOpts *opts) | |
240 | { | |
241 | if (user_creatable_print_help(type, opts)) { | |
242 | exit(0); | |
243 | } | |
244 | return true; | |
245 | } | |
246 | ||
247 | /* | |
248 | * Is @optarg safe for accumulate_options()? | |
249 | * It is when multiple of them can be joined together separated by ','. | |
250 | * To make that work, @optarg must not start with ',' (or else a | |
251 | * separating ',' preceding it gets escaped), and it must not end with | |
252 | * an odd number of ',' (or else a separating ',' following it gets | |
253 | * escaped), or be empty (or else a separating ',' preceding it can | |
254 | * escape a separating ',' following it). | |
255 | * | |
256 | */ | |
257 | static bool is_valid_option_list(const char *optarg) | |
258 | { | |
259 | size_t len = strlen(optarg); | |
260 | size_t i; | |
261 | ||
262 | if (!optarg[0] || optarg[0] == ',') { | |
263 | return false; | |
264 | } | |
265 | ||
266 | for (i = len; i > 0 && optarg[i - 1] == ','; i--) { | |
267 | } | |
268 | if ((len - i) % 2) { | |
269 | return false; | |
270 | } | |
271 | ||
272 | return true; | |
273 | } | |
274 | ||
275 | static int accumulate_options(char **options, char *optarg) | |
276 | { | |
277 | char *new_options; | |
278 | ||
279 | if (!is_valid_option_list(optarg)) { | |
280 | error_report("Invalid option list: %s", optarg); | |
281 | return -1; | |
282 | } | |
283 | ||
284 | if (!*options) { | |
285 | *options = g_strdup(optarg); | |
286 | } else { | |
287 | new_options = g_strdup_printf("%s,%s", *options, optarg); | |
288 | g_free(*options); | |
289 | *options = new_options; | |
290 | } | |
291 | return 0; | |
292 | } | |
293 | ||
294 | static QemuOptsList qemu_source_opts = { | |
295 | .name = "source", | |
296 | .implied_opt_name = "file", | |
297 | .head = QTAILQ_HEAD_INITIALIZER(qemu_source_opts.head), | |
298 | .desc = { | |
299 | { } | |
300 | }, | |
301 | }; | |
302 | ||
303 | static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...) | |
304 | { | |
305 | int ret = 0; | |
306 | if (!quiet) { | |
307 | va_list args; | |
308 | va_start(args, fmt); | |
309 | ret = vprintf(fmt, args); | |
310 | va_end(args); | |
311 | } | |
312 | return ret; | |
313 | } | |
314 | ||
315 | ||
316 | static int print_block_option_help(const char *filename, const char *fmt) | |
317 | { | |
318 | BlockDriver *drv, *proto_drv; | |
319 | QemuOptsList *create_opts = NULL; | |
320 | Error *local_err = NULL; | |
321 | ||
322 | /* Find driver and parse its options */ | |
323 | drv = bdrv_find_format(fmt); | |
324 | if (!drv) { | |
325 | error_report("Unknown file format '%s'", fmt); | |
326 | return 1; | |
327 | } | |
328 | ||
329 | if (!drv->create_opts) { | |
330 | error_report("Format driver '%s' does not support image creation", fmt); | |
331 | return 1; | |
332 | } | |
333 | ||
334 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
335 | if (filename) { | |
336 | proto_drv = bdrv_find_protocol(filename, true, &local_err); | |
337 | if (!proto_drv) { | |
338 | error_report_err(local_err); | |
339 | qemu_opts_free(create_opts); | |
340 | return 1; | |
341 | } | |
342 | if (!proto_drv->create_opts) { | |
343 | error_report("Protocol driver '%s' does not support image creation", | |
344 | proto_drv->format_name); | |
345 | qemu_opts_free(create_opts); | |
346 | return 1; | |
347 | } | |
348 | create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); | |
349 | } | |
350 | ||
351 | if (filename) { | |
352 | printf("Supported options:\n"); | |
353 | } else { | |
354 | printf("Supported %s options:\n", fmt); | |
355 | } | |
356 | qemu_opts_print_help(create_opts, false); | |
357 | qemu_opts_free(create_opts); | |
358 | ||
359 | if (!filename) { | |
360 | printf("\n" | |
361 | "The protocol level may support further options.\n" | |
362 | "Specify the target filename to include those options.\n"); | |
363 | } | |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
368 | ||
369 | static BlockBackend *img_open_opts(const char *optstr, | |
370 | QemuOpts *opts, int flags, bool writethrough, | |
371 | bool quiet, bool force_share) | |
372 | { | |
373 | QDict *options; | |
374 | Error *local_err = NULL; | |
375 | BlockBackend *blk; | |
376 | options = qemu_opts_to_qdict(opts, NULL); | |
377 | if (force_share) { | |
378 | if (qdict_haskey(options, BDRV_OPT_FORCE_SHARE) | |
379 | && strcmp(qdict_get_str(options, BDRV_OPT_FORCE_SHARE), "on")) { | |
380 | error_report("--force-share/-U conflicts with image options"); | |
381 | qobject_unref(options); | |
382 | return NULL; | |
383 | } | |
384 | qdict_put_str(options, BDRV_OPT_FORCE_SHARE, "on"); | |
385 | } | |
386 | blk = blk_new_open(NULL, NULL, options, flags, &local_err); | |
387 | if (!blk) { | |
388 | error_reportf_err(local_err, "Could not open '%s': ", optstr); | |
389 | return NULL; | |
390 | } | |
391 | blk_set_enable_write_cache(blk, !writethrough); | |
392 | ||
393 | return blk; | |
394 | } | |
395 | ||
396 | static BlockBackend *img_open_file(const char *filename, | |
397 | QDict *options, | |
398 | const char *fmt, int flags, | |
399 | bool writethrough, bool quiet, | |
400 | bool force_share) | |
401 | { | |
402 | BlockBackend *blk; | |
403 | Error *local_err = NULL; | |
404 | ||
405 | if (!options) { | |
406 | options = qdict_new(); | |
407 | } | |
408 | if (fmt) { | |
409 | qdict_put_str(options, "driver", fmt); | |
410 | } | |
411 | ||
412 | if (force_share) { | |
413 | qdict_put_bool(options, BDRV_OPT_FORCE_SHARE, true); | |
414 | } | |
415 | blk = blk_new_open(filename, NULL, options, flags, &local_err); | |
416 | if (!blk) { | |
417 | error_reportf_err(local_err, "Could not open '%s': ", filename); | |
418 | return NULL; | |
419 | } | |
420 | blk_set_enable_write_cache(blk, !writethrough); | |
421 | ||
422 | return blk; | |
423 | } | |
424 | ||
425 | ||
426 | static int img_add_key_secrets(void *opaque, | |
427 | const char *name, const char *value, | |
428 | Error **errp) | |
429 | { | |
430 | QDict *options = opaque; | |
431 | ||
432 | if (g_str_has_suffix(name, "key-secret")) { | |
433 | qdict_put_str(options, name, value); | |
434 | } | |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
439 | ||
440 | static BlockBackend *img_open(bool image_opts, | |
441 | const char *filename, | |
442 | const char *fmt, int flags, bool writethrough, | |
443 | bool quiet, bool force_share) | |
444 | { | |
445 | BlockBackend *blk; | |
446 | if (image_opts) { | |
447 | QemuOpts *opts; | |
448 | if (fmt) { | |
449 | error_report("--image-opts and --format are mutually exclusive"); | |
450 | return NULL; | |
451 | } | |
452 | opts = qemu_opts_parse_noisily(qemu_find_opts("source"), | |
453 | filename, true); | |
454 | if (!opts) { | |
455 | return NULL; | |
456 | } | |
457 | blk = img_open_opts(filename, opts, flags, writethrough, quiet, | |
458 | force_share); | |
459 | } else { | |
460 | blk = img_open_file(filename, NULL, fmt, flags, writethrough, quiet, | |
461 | force_share); | |
462 | } | |
463 | return blk; | |
464 | } | |
465 | ||
466 | ||
467 | static int add_old_style_options(const char *fmt, QemuOpts *opts, | |
468 | const char *base_filename, | |
469 | const char *base_fmt) | |
470 | { | |
471 | if (base_filename) { | |
472 | if (!qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, | |
473 | NULL)) { | |
474 | error_report("Backing file not supported for file format '%s'", | |
475 | fmt); | |
476 | return -1; | |
477 | } | |
478 | } | |
479 | if (base_fmt) { | |
480 | if (!qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, NULL)) { | |
481 | error_report("Backing file format not supported for file " | |
482 | "format '%s'", fmt); | |
483 | return -1; | |
484 | } | |
485 | } | |
486 | return 0; | |
487 | } | |
488 | ||
489 | static int64_t cvtnum_full(const char *name, const char *value, int64_t min, | |
490 | int64_t max) | |
491 | { | |
492 | int err; | |
493 | uint64_t res; | |
494 | ||
495 | err = qemu_strtosz(value, NULL, &res); | |
496 | if (err < 0 && err != -ERANGE) { | |
497 | error_report("Invalid %s specified. You may use " | |
498 | "k, M, G, T, P or E suffixes for", name); | |
499 | error_report("kilobytes, megabytes, gigabytes, terabytes, " | |
500 | "petabytes and exabytes."); | |
501 | return err; | |
502 | } | |
503 | if (err == -ERANGE || res > max || res < min) { | |
504 | error_report("Invalid %s specified. Must be between %" PRId64 | |
505 | " and %" PRId64 ".", name, min, max); | |
506 | return -ERANGE; | |
507 | } | |
508 | return res; | |
509 | } | |
510 | ||
511 | static int64_t cvtnum(const char *name, const char *value) | |
512 | { | |
513 | return cvtnum_full(name, value, 0, INT64_MAX); | |
514 | } | |
515 | ||
516 | static int img_create(int argc, char **argv) | |
517 | { | |
518 | int c; | |
519 | uint64_t img_size = -1; | |
520 | const char *fmt = "raw"; | |
521 | const char *base_fmt = NULL; | |
522 | const char *filename; | |
523 | const char *base_filename = NULL; | |
524 | char *options = NULL; | |
525 | Error *local_err = NULL; | |
526 | bool quiet = false; | |
527 | int flags = 0; | |
528 | ||
529 | for(;;) { | |
530 | static const struct option long_options[] = { | |
531 | {"help", no_argument, 0, 'h'}, | |
532 | {"object", required_argument, 0, OPTION_OBJECT}, | |
533 | {0, 0, 0, 0} | |
534 | }; | |
535 | c = getopt_long(argc, argv, ":F:b:f:ho:qu", | |
536 | long_options, NULL); | |
537 | if (c == -1) { | |
538 | break; | |
539 | } | |
540 | switch(c) { | |
541 | case ':': | |
542 | missing_argument(argv[optind - 1]); | |
543 | break; | |
544 | case '?': | |
545 | unrecognized_option(argv[optind - 1]); | |
546 | break; | |
547 | case 'h': | |
548 | help(); | |
549 | break; | |
550 | case 'F': | |
551 | base_fmt = optarg; | |
552 | break; | |
553 | case 'b': | |
554 | base_filename = optarg; | |
555 | break; | |
556 | case 'f': | |
557 | fmt = optarg; | |
558 | break; | |
559 | case 'o': | |
560 | if (accumulate_options(&options, optarg) < 0) { | |
561 | goto fail; | |
562 | } | |
563 | break; | |
564 | case 'q': | |
565 | quiet = true; | |
566 | break; | |
567 | case 'u': | |
568 | flags |= BDRV_O_NO_BACKING; | |
569 | break; | |
570 | case OPTION_OBJECT: { | |
571 | QemuOpts *opts; | |
572 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
573 | optarg, true); | |
574 | if (!opts) { | |
575 | goto fail; | |
576 | } | |
577 | } break; | |
578 | } | |
579 | } | |
580 | ||
581 | /* Get the filename */ | |
582 | filename = (optind < argc) ? argv[optind] : NULL; | |
583 | if (options && has_help_option(options)) { | |
584 | g_free(options); | |
585 | return print_block_option_help(filename, fmt); | |
586 | } | |
587 | ||
588 | if (optind >= argc) { | |
589 | error_exit("Expecting image file name"); | |
590 | } | |
591 | optind++; | |
592 | ||
593 | if (qemu_opts_foreach(&qemu_object_opts, | |
594 | user_creatable_add_opts_foreach, | |
595 | qemu_img_object_print_help, &error_fatal)) { | |
596 | goto fail; | |
597 | } | |
598 | ||
599 | /* Get image size, if specified */ | |
600 | if (optind < argc) { | |
601 | int64_t sval; | |
602 | ||
603 | sval = cvtnum("image size", argv[optind++]); | |
604 | if (sval < 0) { | |
605 | goto fail; | |
606 | } | |
607 | img_size = (uint64_t)sval; | |
608 | } | |
609 | if (optind != argc) { | |
610 | error_exit("Unexpected argument: %s", argv[optind]); | |
611 | } | |
612 | ||
613 | bdrv_img_create(filename, fmt, base_filename, base_fmt, | |
614 | options, img_size, flags, quiet, &local_err); | |
615 | if (local_err) { | |
616 | error_reportf_err(local_err, "%s: ", filename); | |
617 | goto fail; | |
618 | } | |
619 | ||
620 | g_free(options); | |
621 | return 0; | |
622 | ||
623 | fail: | |
624 | g_free(options); | |
625 | return 1; | |
626 | } | |
627 | ||
628 | static void dump_json_image_check(ImageCheck *check, bool quiet) | |
629 | { | |
630 | QString *str; | |
631 | QObject *obj; | |
632 | Visitor *v = qobject_output_visitor_new(&obj); | |
633 | ||
634 | visit_type_ImageCheck(v, NULL, &check, &error_abort); | |
635 | visit_complete(v, &obj); | |
636 | str = qobject_to_json_pretty(obj); | |
637 | assert(str != NULL); | |
638 | qprintf(quiet, "%s\n", qstring_get_str(str)); | |
639 | qobject_unref(obj); | |
640 | visit_free(v); | |
641 | qobject_unref(str); | |
642 | } | |
643 | ||
644 | static void dump_human_image_check(ImageCheck *check, bool quiet) | |
645 | { | |
646 | if (!(check->corruptions || check->leaks || check->check_errors)) { | |
647 | qprintf(quiet, "No errors were found on the image.\n"); | |
648 | } else { | |
649 | if (check->corruptions) { | |
650 | qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n" | |
651 | "Data may be corrupted, or further writes to the image " | |
652 | "may corrupt it.\n", | |
653 | check->corruptions); | |
654 | } | |
655 | ||
656 | if (check->leaks) { | |
657 | qprintf(quiet, | |
658 | "\n%" PRId64 " leaked clusters were found on the image.\n" | |
659 | "This means waste of disk space, but no harm to data.\n", | |
660 | check->leaks); | |
661 | } | |
662 | ||
663 | if (check->check_errors) { | |
664 | qprintf(quiet, | |
665 | "\n%" PRId64 | |
666 | " internal errors have occurred during the check.\n", | |
667 | check->check_errors); | |
668 | } | |
669 | } | |
670 | ||
671 | if (check->total_clusters != 0 && check->allocated_clusters != 0) { | |
672 | qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, " | |
673 | "%0.2f%% fragmented, %0.2f%% compressed clusters\n", | |
674 | check->allocated_clusters, check->total_clusters, | |
675 | check->allocated_clusters * 100.0 / check->total_clusters, | |
676 | check->fragmented_clusters * 100.0 / check->allocated_clusters, | |
677 | check->compressed_clusters * 100.0 / | |
678 | check->allocated_clusters); | |
679 | } | |
680 | ||
681 | if (check->image_end_offset) { | |
682 | qprintf(quiet, | |
683 | "Image end offset: %" PRId64 "\n", check->image_end_offset); | |
684 | } | |
685 | } | |
686 | ||
687 | static int collect_image_check(BlockDriverState *bs, | |
688 | ImageCheck *check, | |
689 | const char *filename, | |
690 | const char *fmt, | |
691 | int fix) | |
692 | { | |
693 | int ret; | |
694 | BdrvCheckResult result; | |
695 | ||
696 | ret = bdrv_check(bs, &result, fix); | |
697 | if (ret < 0) { | |
698 | return ret; | |
699 | } | |
700 | ||
701 | check->filename = g_strdup(filename); | |
702 | check->format = g_strdup(bdrv_get_format_name(bs)); | |
703 | check->check_errors = result.check_errors; | |
704 | check->corruptions = result.corruptions; | |
705 | check->has_corruptions = result.corruptions != 0; | |
706 | check->leaks = result.leaks; | |
707 | check->has_leaks = result.leaks != 0; | |
708 | check->corruptions_fixed = result.corruptions_fixed; | |
709 | check->has_corruptions_fixed = result.corruptions_fixed != 0; | |
710 | check->leaks_fixed = result.leaks_fixed; | |
711 | check->has_leaks_fixed = result.leaks_fixed != 0; | |
712 | check->image_end_offset = result.image_end_offset; | |
713 | check->has_image_end_offset = result.image_end_offset != 0; | |
714 | check->total_clusters = result.bfi.total_clusters; | |
715 | check->has_total_clusters = result.bfi.total_clusters != 0; | |
716 | check->allocated_clusters = result.bfi.allocated_clusters; | |
717 | check->has_allocated_clusters = result.bfi.allocated_clusters != 0; | |
718 | check->fragmented_clusters = result.bfi.fragmented_clusters; | |
719 | check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0; | |
720 | check->compressed_clusters = result.bfi.compressed_clusters; | |
721 | check->has_compressed_clusters = result.bfi.compressed_clusters != 0; | |
722 | ||
723 | return 0; | |
724 | } | |
725 | ||
726 | /* | |
727 | * Checks an image for consistency. Exit codes: | |
728 | * | |
729 | * 0 - Check completed, image is good | |
730 | * 1 - Check not completed because of internal errors | |
731 | * 2 - Check completed, image is corrupted | |
732 | * 3 - Check completed, image has leaked clusters, but is good otherwise | |
733 | * 63 - Checks are not supported by the image format | |
734 | */ | |
735 | static int img_check(int argc, char **argv) | |
736 | { | |
737 | int c, ret; | |
738 | OutputFormat output_format = OFORMAT_HUMAN; | |
739 | const char *filename, *fmt, *output, *cache; | |
740 | BlockBackend *blk; | |
741 | BlockDriverState *bs; | |
742 | int fix = 0; | |
743 | int flags = BDRV_O_CHECK; | |
744 | bool writethrough; | |
745 | ImageCheck *check; | |
746 | bool quiet = false; | |
747 | bool image_opts = false; | |
748 | bool force_share = false; | |
749 | ||
750 | fmt = NULL; | |
751 | output = NULL; | |
752 | cache = BDRV_DEFAULT_CACHE; | |
753 | ||
754 | for(;;) { | |
755 | int option_index = 0; | |
756 | static const struct option long_options[] = { | |
757 | {"help", no_argument, 0, 'h'}, | |
758 | {"format", required_argument, 0, 'f'}, | |
759 | {"repair", required_argument, 0, 'r'}, | |
760 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
761 | {"object", required_argument, 0, OPTION_OBJECT}, | |
762 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
763 | {"force-share", no_argument, 0, 'U'}, | |
764 | {0, 0, 0, 0} | |
765 | }; | |
766 | c = getopt_long(argc, argv, ":hf:r:T:qU", | |
767 | long_options, &option_index); | |
768 | if (c == -1) { | |
769 | break; | |
770 | } | |
771 | switch(c) { | |
772 | case ':': | |
773 | missing_argument(argv[optind - 1]); | |
774 | break; | |
775 | case '?': | |
776 | unrecognized_option(argv[optind - 1]); | |
777 | break; | |
778 | case 'h': | |
779 | help(); | |
780 | break; | |
781 | case 'f': | |
782 | fmt = optarg; | |
783 | break; | |
784 | case 'r': | |
785 | flags |= BDRV_O_RDWR; | |
786 | ||
787 | if (!strcmp(optarg, "leaks")) { | |
788 | fix = BDRV_FIX_LEAKS; | |
789 | } else if (!strcmp(optarg, "all")) { | |
790 | fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; | |
791 | } else { | |
792 | error_exit("Unknown option value for -r " | |
793 | "(expecting 'leaks' or 'all'): %s", optarg); | |
794 | } | |
795 | break; | |
796 | case OPTION_OUTPUT: | |
797 | output = optarg; | |
798 | break; | |
799 | case 'T': | |
800 | cache = optarg; | |
801 | break; | |
802 | case 'q': | |
803 | quiet = true; | |
804 | break; | |
805 | case 'U': | |
806 | force_share = true; | |
807 | break; | |
808 | case OPTION_OBJECT: { | |
809 | QemuOpts *opts; | |
810 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
811 | optarg, true); | |
812 | if (!opts) { | |
813 | return 1; | |
814 | } | |
815 | } break; | |
816 | case OPTION_IMAGE_OPTS: | |
817 | image_opts = true; | |
818 | break; | |
819 | } | |
820 | } | |
821 | if (optind != argc - 1) { | |
822 | error_exit("Expecting one image file name"); | |
823 | } | |
824 | filename = argv[optind++]; | |
825 | ||
826 | if (output && !strcmp(output, "json")) { | |
827 | output_format = OFORMAT_JSON; | |
828 | } else if (output && !strcmp(output, "human")) { | |
829 | output_format = OFORMAT_HUMAN; | |
830 | } else if (output) { | |
831 | error_report("--output must be used with human or json as argument."); | |
832 | return 1; | |
833 | } | |
834 | ||
835 | if (qemu_opts_foreach(&qemu_object_opts, | |
836 | user_creatable_add_opts_foreach, | |
837 | qemu_img_object_print_help, &error_fatal)) { | |
838 | return 1; | |
839 | } | |
840 | ||
841 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
842 | if (ret < 0) { | |
843 | error_report("Invalid source cache option: %s", cache); | |
844 | return 1; | |
845 | } | |
846 | ||
847 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, | |
848 | force_share); | |
849 | if (!blk) { | |
850 | return 1; | |
851 | } | |
852 | bs = blk_bs(blk); | |
853 | ||
854 | check = g_new0(ImageCheck, 1); | |
855 | ret = collect_image_check(bs, check, filename, fmt, fix); | |
856 | ||
857 | if (ret == -ENOTSUP) { | |
858 | error_report("This image format does not support checks"); | |
859 | ret = 63; | |
860 | goto fail; | |
861 | } | |
862 | ||
863 | if (check->corruptions_fixed || check->leaks_fixed) { | |
864 | int corruptions_fixed, leaks_fixed; | |
865 | bool has_leaks_fixed, has_corruptions_fixed; | |
866 | ||
867 | leaks_fixed = check->leaks_fixed; | |
868 | has_leaks_fixed = check->has_leaks_fixed; | |
869 | corruptions_fixed = check->corruptions_fixed; | |
870 | has_corruptions_fixed = check->has_corruptions_fixed; | |
871 | ||
872 | if (output_format == OFORMAT_HUMAN) { | |
873 | qprintf(quiet, | |
874 | "The following inconsistencies were found and repaired:\n\n" | |
875 | " %" PRId64 " leaked clusters\n" | |
876 | " %" PRId64 " corruptions\n\n" | |
877 | "Double checking the fixed image now...\n", | |
878 | check->leaks_fixed, | |
879 | check->corruptions_fixed); | |
880 | } | |
881 | ||
882 | qapi_free_ImageCheck(check); | |
883 | check = g_new0(ImageCheck, 1); | |
884 | ret = collect_image_check(bs, check, filename, fmt, 0); | |
885 | ||
886 | check->leaks_fixed = leaks_fixed; | |
887 | check->has_leaks_fixed = has_leaks_fixed; | |
888 | check->corruptions_fixed = corruptions_fixed; | |
889 | check->has_corruptions_fixed = has_corruptions_fixed; | |
890 | } | |
891 | ||
892 | if (!ret) { | |
893 | switch (output_format) { | |
894 | case OFORMAT_HUMAN: | |
895 | dump_human_image_check(check, quiet); | |
896 | break; | |
897 | case OFORMAT_JSON: | |
898 | dump_json_image_check(check, quiet); | |
899 | break; | |
900 | } | |
901 | } | |
902 | ||
903 | if (ret || check->check_errors) { | |
904 | if (ret) { | |
905 | error_report("Check failed: %s", strerror(-ret)); | |
906 | } else { | |
907 | error_report("Check failed"); | |
908 | } | |
909 | ret = 1; | |
910 | goto fail; | |
911 | } | |
912 | ||
913 | if (check->corruptions) { | |
914 | ret = 2; | |
915 | } else if (check->leaks) { | |
916 | ret = 3; | |
917 | } else { | |
918 | ret = 0; | |
919 | } | |
920 | ||
921 | fail: | |
922 | qapi_free_ImageCheck(check); | |
923 | blk_unref(blk); | |
924 | return ret; | |
925 | } | |
926 | ||
927 | typedef struct CommonBlockJobCBInfo { | |
928 | BlockDriverState *bs; | |
929 | Error **errp; | |
930 | } CommonBlockJobCBInfo; | |
931 | ||
932 | static void common_block_job_cb(void *opaque, int ret) | |
933 | { | |
934 | CommonBlockJobCBInfo *cbi = opaque; | |
935 | ||
936 | if (ret < 0) { | |
937 | error_setg_errno(cbi->errp, -ret, "Block job failed"); | |
938 | } | |
939 | } | |
940 | ||
941 | static void run_block_job(BlockJob *job, Error **errp) | |
942 | { | |
943 | AioContext *aio_context = blk_get_aio_context(job->blk); | |
944 | int ret = 0; | |
945 | ||
946 | aio_context_acquire(aio_context); | |
947 | job_ref(&job->job); | |
948 | do { | |
949 | float progress = 0.0f; | |
950 | aio_poll(aio_context, true); | |
951 | if (job->job.progress.total) { | |
952 | progress = (float)job->job.progress.current / | |
953 | job->job.progress.total * 100.f; | |
954 | } | |
955 | qemu_progress_print(progress, 0); | |
956 | } while (!job_is_ready(&job->job) && !job_is_completed(&job->job)); | |
957 | ||
958 | if (!job_is_completed(&job->job)) { | |
959 | ret = job_complete_sync(&job->job, errp); | |
960 | } else { | |
961 | ret = job->job.ret; | |
962 | } | |
963 | job_unref(&job->job); | |
964 | aio_context_release(aio_context); | |
965 | ||
966 | /* publish completion progress only when success */ | |
967 | if (!ret) { | |
968 | qemu_progress_print(100.f, 0); | |
969 | } | |
970 | } | |
971 | ||
972 | static int img_commit(int argc, char **argv) | |
973 | { | |
974 | int c, ret, flags; | |
975 | const char *filename, *fmt, *cache, *base; | |
976 | BlockBackend *blk; | |
977 | BlockDriverState *bs, *base_bs; | |
978 | BlockJob *job; | |
979 | bool progress = false, quiet = false, drop = false; | |
980 | bool writethrough; | |
981 | Error *local_err = NULL; | |
982 | CommonBlockJobCBInfo cbi; | |
983 | bool image_opts = false; | |
984 | AioContext *aio_context; | |
985 | int64_t rate_limit = 0; | |
986 | ||
987 | fmt = NULL; | |
988 | cache = BDRV_DEFAULT_CACHE; | |
989 | base = NULL; | |
990 | for(;;) { | |
991 | static const struct option long_options[] = { | |
992 | {"help", no_argument, 0, 'h'}, | |
993 | {"object", required_argument, 0, OPTION_OBJECT}, | |
994 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
995 | {0, 0, 0, 0} | |
996 | }; | |
997 | c = getopt_long(argc, argv, ":f:ht:b:dpqr:", | |
998 | long_options, NULL); | |
999 | if (c == -1) { | |
1000 | break; | |
1001 | } | |
1002 | switch(c) { | |
1003 | case ':': | |
1004 | missing_argument(argv[optind - 1]); | |
1005 | break; | |
1006 | case '?': | |
1007 | unrecognized_option(argv[optind - 1]); | |
1008 | break; | |
1009 | case 'h': | |
1010 | help(); | |
1011 | break; | |
1012 | case 'f': | |
1013 | fmt = optarg; | |
1014 | break; | |
1015 | case 't': | |
1016 | cache = optarg; | |
1017 | break; | |
1018 | case 'b': | |
1019 | base = optarg; | |
1020 | /* -b implies -d */ | |
1021 | drop = true; | |
1022 | break; | |
1023 | case 'd': | |
1024 | drop = true; | |
1025 | break; | |
1026 | case 'p': | |
1027 | progress = true; | |
1028 | break; | |
1029 | case 'q': | |
1030 | quiet = true; | |
1031 | break; | |
1032 | case 'r': | |
1033 | rate_limit = cvtnum("rate limit", optarg); | |
1034 | if (rate_limit < 0) { | |
1035 | return 1; | |
1036 | } | |
1037 | break; | |
1038 | case OPTION_OBJECT: { | |
1039 | QemuOpts *opts; | |
1040 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
1041 | optarg, true); | |
1042 | if (!opts) { | |
1043 | return 1; | |
1044 | } | |
1045 | } break; | |
1046 | case OPTION_IMAGE_OPTS: | |
1047 | image_opts = true; | |
1048 | break; | |
1049 | } | |
1050 | } | |
1051 | ||
1052 | /* Progress is not shown in Quiet mode */ | |
1053 | if (quiet) { | |
1054 | progress = false; | |
1055 | } | |
1056 | ||
1057 | if (optind != argc - 1) { | |
1058 | error_exit("Expecting one image file name"); | |
1059 | } | |
1060 | filename = argv[optind++]; | |
1061 | ||
1062 | if (qemu_opts_foreach(&qemu_object_opts, | |
1063 | user_creatable_add_opts_foreach, | |
1064 | qemu_img_object_print_help, &error_fatal)) { | |
1065 | return 1; | |
1066 | } | |
1067 | ||
1068 | flags = BDRV_O_RDWR | BDRV_O_UNMAP; | |
1069 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
1070 | if (ret < 0) { | |
1071 | error_report("Invalid cache option: %s", cache); | |
1072 | return 1; | |
1073 | } | |
1074 | ||
1075 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, | |
1076 | false); | |
1077 | if (!blk) { | |
1078 | return 1; | |
1079 | } | |
1080 | bs = blk_bs(blk); | |
1081 | ||
1082 | qemu_progress_init(progress, 1.f); | |
1083 | qemu_progress_print(0.f, 100); | |
1084 | ||
1085 | if (base) { | |
1086 | base_bs = bdrv_find_backing_image(bs, base); | |
1087 | if (!base_bs) { | |
1088 | error_setg(&local_err, | |
1089 | "Did not find '%s' in the backing chain of '%s'", | |
1090 | base, filename); | |
1091 | goto done; | |
1092 | } | |
1093 | } else { | |
1094 | /* This is different from QMP, which by default uses the deepest file in | |
1095 | * the backing chain (i.e., the very base); however, the traditional | |
1096 | * behavior of qemu-img commit is using the immediate backing file. */ | |
1097 | base_bs = bdrv_backing_chain_next(bs); | |
1098 | if (!base_bs) { | |
1099 | error_setg(&local_err, "Image does not have a backing file"); | |
1100 | goto done; | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | cbi = (CommonBlockJobCBInfo){ | |
1105 | .errp = &local_err, | |
1106 | .bs = bs, | |
1107 | }; | |
1108 | ||
1109 | aio_context = bdrv_get_aio_context(bs); | |
1110 | aio_context_acquire(aio_context); | |
1111 | commit_active_start("commit", bs, base_bs, JOB_DEFAULT, rate_limit, | |
1112 | BLOCKDEV_ON_ERROR_REPORT, NULL, common_block_job_cb, | |
1113 | &cbi, false, &local_err); | |
1114 | aio_context_release(aio_context); | |
1115 | if (local_err) { | |
1116 | goto done; | |
1117 | } | |
1118 | ||
1119 | /* When the block job completes, the BlockBackend reference will point to | |
1120 | * the old backing file. In order to avoid that the top image is already | |
1121 | * deleted, so we can still empty it afterwards, increment the reference | |
1122 | * counter here preemptively. */ | |
1123 | if (!drop) { | |
1124 | bdrv_ref(bs); | |
1125 | } | |
1126 | ||
1127 | job = block_job_get("commit"); | |
1128 | assert(job); | |
1129 | run_block_job(job, &local_err); | |
1130 | if (local_err) { | |
1131 | goto unref_backing; | |
1132 | } | |
1133 | ||
1134 | if (!drop) { | |
1135 | BlockBackend *old_backing_blk; | |
1136 | ||
1137 | old_backing_blk = blk_new_with_bs(bs, BLK_PERM_WRITE, BLK_PERM_ALL, | |
1138 | &local_err); | |
1139 | if (!old_backing_blk) { | |
1140 | goto unref_backing; | |
1141 | } | |
1142 | ret = blk_make_empty(old_backing_blk, &local_err); | |
1143 | blk_unref(old_backing_blk); | |
1144 | if (ret == -ENOTSUP) { | |
1145 | error_free(local_err); | |
1146 | local_err = NULL; | |
1147 | } else if (ret < 0) { | |
1148 | goto unref_backing; | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | unref_backing: | |
1153 | if (!drop) { | |
1154 | bdrv_unref(bs); | |
1155 | } | |
1156 | ||
1157 | done: | |
1158 | qemu_progress_end(); | |
1159 | ||
1160 | blk_unref(blk); | |
1161 | ||
1162 | if (local_err) { | |
1163 | error_report_err(local_err); | |
1164 | return 1; | |
1165 | } | |
1166 | ||
1167 | qprintf(quiet, "Image committed.\n"); | |
1168 | return 0; | |
1169 | } | |
1170 | ||
1171 | /* | |
1172 | * Returns -1 if 'buf' contains only zeroes, otherwise the byte index | |
1173 | * of the first sector boundary within buf where the sector contains a | |
1174 | * non-zero byte. This function is robust to a buffer that is not | |
1175 | * sector-aligned. | |
1176 | */ | |
1177 | static int64_t find_nonzero(const uint8_t *buf, int64_t n) | |
1178 | { | |
1179 | int64_t i; | |
1180 | int64_t end = QEMU_ALIGN_DOWN(n, BDRV_SECTOR_SIZE); | |
1181 | ||
1182 | for (i = 0; i < end; i += BDRV_SECTOR_SIZE) { | |
1183 | if (!buffer_is_zero(buf + i, BDRV_SECTOR_SIZE)) { | |
1184 | return i; | |
1185 | } | |
1186 | } | |
1187 | if (i < n && !buffer_is_zero(buf + i, n - end)) { | |
1188 | return i; | |
1189 | } | |
1190 | return -1; | |
1191 | } | |
1192 | ||
1193 | /* | |
1194 | * Returns true iff the first sector pointed to by 'buf' contains at least | |
1195 | * a non-NUL byte. | |
1196 | * | |
1197 | * 'pnum' is set to the number of sectors (including and immediately following | |
1198 | * the first one) that are known to be in the same allocated/unallocated state. | |
1199 | * The function will try to align the end offset to alignment boundaries so | |
1200 | * that the request will at least end aligned and consecutive requests will | |
1201 | * also start at an aligned offset. | |
1202 | */ | |
1203 | static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum, | |
1204 | int64_t sector_num, int alignment) | |
1205 | { | |
1206 | bool is_zero; | |
1207 | int i, tail; | |
1208 | ||
1209 | if (n <= 0) { | |
1210 | *pnum = 0; | |
1211 | return 0; | |
1212 | } | |
1213 | is_zero = buffer_is_zero(buf, BDRV_SECTOR_SIZE); | |
1214 | for(i = 1; i < n; i++) { | |
1215 | buf += BDRV_SECTOR_SIZE; | |
1216 | if (is_zero != buffer_is_zero(buf, BDRV_SECTOR_SIZE)) { | |
1217 | break; | |
1218 | } | |
1219 | } | |
1220 | ||
1221 | tail = (sector_num + i) & (alignment - 1); | |
1222 | if (tail) { | |
1223 | if (is_zero && i <= tail) { | |
1224 | /* treat unallocated areas which only consist | |
1225 | * of a small tail as allocated. */ | |
1226 | is_zero = false; | |
1227 | } | |
1228 | if (!is_zero) { | |
1229 | /* align up end offset of allocated areas. */ | |
1230 | i += alignment - tail; | |
1231 | i = MIN(i, n); | |
1232 | } else { | |
1233 | /* align down end offset of zero areas. */ | |
1234 | i -= tail; | |
1235 | } | |
1236 | } | |
1237 | *pnum = i; | |
1238 | return !is_zero; | |
1239 | } | |
1240 | ||
1241 | /* | |
1242 | * Like is_allocated_sectors, but if the buffer starts with a used sector, | |
1243 | * up to 'min' consecutive sectors containing zeros are ignored. This avoids | |
1244 | * breaking up write requests for only small sparse areas. | |
1245 | */ | |
1246 | static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, | |
1247 | int min, int64_t sector_num, int alignment) | |
1248 | { | |
1249 | int ret; | |
1250 | int num_checked, num_used; | |
1251 | ||
1252 | if (n < min) { | |
1253 | min = n; | |
1254 | } | |
1255 | ||
1256 | ret = is_allocated_sectors(buf, n, pnum, sector_num, alignment); | |
1257 | if (!ret) { | |
1258 | return ret; | |
1259 | } | |
1260 | ||
1261 | num_used = *pnum; | |
1262 | buf += BDRV_SECTOR_SIZE * *pnum; | |
1263 | n -= *pnum; | |
1264 | sector_num += *pnum; | |
1265 | num_checked = num_used; | |
1266 | ||
1267 | while (n > 0) { | |
1268 | ret = is_allocated_sectors(buf, n, pnum, sector_num, alignment); | |
1269 | ||
1270 | buf += BDRV_SECTOR_SIZE * *pnum; | |
1271 | n -= *pnum; | |
1272 | sector_num += *pnum; | |
1273 | num_checked += *pnum; | |
1274 | if (ret) { | |
1275 | num_used = num_checked; | |
1276 | } else if (*pnum >= min) { | |
1277 | break; | |
1278 | } | |
1279 | } | |
1280 | ||
1281 | *pnum = num_used; | |
1282 | return 1; | |
1283 | } | |
1284 | ||
1285 | /* | |
1286 | * Compares two buffers sector by sector. Returns 0 if the first | |
1287 | * sector of each buffer matches, non-zero otherwise. | |
1288 | * | |
1289 | * pnum is set to the sector-aligned size of the buffer prefix that | |
1290 | * has the same matching status as the first sector. | |
1291 | */ | |
1292 | static int compare_buffers(const uint8_t *buf1, const uint8_t *buf2, | |
1293 | int64_t bytes, int64_t *pnum) | |
1294 | { | |
1295 | bool res; | |
1296 | int64_t i = MIN(bytes, BDRV_SECTOR_SIZE); | |
1297 | ||
1298 | assert(bytes > 0); | |
1299 | ||
1300 | res = !!memcmp(buf1, buf2, i); | |
1301 | while (i < bytes) { | |
1302 | int64_t len = MIN(bytes - i, BDRV_SECTOR_SIZE); | |
1303 | ||
1304 | if (!!memcmp(buf1 + i, buf2 + i, len) != res) { | |
1305 | break; | |
1306 | } | |
1307 | i += len; | |
1308 | } | |
1309 | ||
1310 | *pnum = i; | |
1311 | return res; | |
1312 | } | |
1313 | ||
1314 | #define IO_BUF_SIZE (2 * MiB) | |
1315 | ||
1316 | /* | |
1317 | * Check if passed sectors are empty (not allocated or contain only 0 bytes) | |
1318 | * | |
1319 | * Intended for use by 'qemu-img compare': Returns 0 in case sectors are | |
1320 | * filled with 0, 1 if sectors contain non-zero data (this is a comparison | |
1321 | * failure), and 4 on error (the exit status for read errors), after emitting | |
1322 | * an error message. | |
1323 | * | |
1324 | * @param blk: BlockBackend for the image | |
1325 | * @param offset: Starting offset to check | |
1326 | * @param bytes: Number of bytes to check | |
1327 | * @param filename: Name of disk file we are checking (logging purpose) | |
1328 | * @param buffer: Allocated buffer for storing read data | |
1329 | * @param quiet: Flag for quiet mode | |
1330 | */ | |
1331 | static int check_empty_sectors(BlockBackend *blk, int64_t offset, | |
1332 | int64_t bytes, const char *filename, | |
1333 | uint8_t *buffer, bool quiet) | |
1334 | { | |
1335 | int ret = 0; | |
1336 | int64_t idx; | |
1337 | ||
1338 | ret = blk_pread(blk, offset, buffer, bytes); | |
1339 | if (ret < 0) { | |
1340 | error_report("Error while reading offset %" PRId64 " of %s: %s", | |
1341 | offset, filename, strerror(-ret)); | |
1342 | return 4; | |
1343 | } | |
1344 | idx = find_nonzero(buffer, bytes); | |
1345 | if (idx >= 0) { | |
1346 | qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", | |
1347 | offset + idx); | |
1348 | return 1; | |
1349 | } | |
1350 | ||
1351 | return 0; | |
1352 | } | |
1353 | ||
1354 | /* | |
1355 | * Compares two images. Exit codes: | |
1356 | * | |
1357 | * 0 - Images are identical | |
1358 | * 1 - Images differ | |
1359 | * >1 - Error occurred | |
1360 | */ | |
1361 | static int img_compare(int argc, char **argv) | |
1362 | { | |
1363 | const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2; | |
1364 | BlockBackend *blk1, *blk2; | |
1365 | BlockDriverState *bs1, *bs2; | |
1366 | int64_t total_size1, total_size2; | |
1367 | uint8_t *buf1 = NULL, *buf2 = NULL; | |
1368 | int64_t pnum1, pnum2; | |
1369 | int allocated1, allocated2; | |
1370 | int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */ | |
1371 | bool progress = false, quiet = false, strict = false; | |
1372 | int flags; | |
1373 | bool writethrough; | |
1374 | int64_t total_size; | |
1375 | int64_t offset = 0; | |
1376 | int64_t chunk; | |
1377 | int c; | |
1378 | uint64_t progress_base; | |
1379 | bool image_opts = false; | |
1380 | bool force_share = false; | |
1381 | ||
1382 | cache = BDRV_DEFAULT_CACHE; | |
1383 | for (;;) { | |
1384 | static const struct option long_options[] = { | |
1385 | {"help", no_argument, 0, 'h'}, | |
1386 | {"object", required_argument, 0, OPTION_OBJECT}, | |
1387 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
1388 | {"force-share", no_argument, 0, 'U'}, | |
1389 | {0, 0, 0, 0} | |
1390 | }; | |
1391 | c = getopt_long(argc, argv, ":hf:F:T:pqsU", | |
1392 | long_options, NULL); | |
1393 | if (c == -1) { | |
1394 | break; | |
1395 | } | |
1396 | switch (c) { | |
1397 | case ':': | |
1398 | missing_argument(argv[optind - 1]); | |
1399 | break; | |
1400 | case '?': | |
1401 | unrecognized_option(argv[optind - 1]); | |
1402 | break; | |
1403 | case 'h': | |
1404 | help(); | |
1405 | break; | |
1406 | case 'f': | |
1407 | fmt1 = optarg; | |
1408 | break; | |
1409 | case 'F': | |
1410 | fmt2 = optarg; | |
1411 | break; | |
1412 | case 'T': | |
1413 | cache = optarg; | |
1414 | break; | |
1415 | case 'p': | |
1416 | progress = true; | |
1417 | break; | |
1418 | case 'q': | |
1419 | quiet = true; | |
1420 | break; | |
1421 | case 's': | |
1422 | strict = true; | |
1423 | break; | |
1424 | case 'U': | |
1425 | force_share = true; | |
1426 | break; | |
1427 | case OPTION_OBJECT: { | |
1428 | QemuOpts *opts; | |
1429 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
1430 | optarg, true); | |
1431 | if (!opts) { | |
1432 | ret = 2; | |
1433 | goto out4; | |
1434 | } | |
1435 | } break; | |
1436 | case OPTION_IMAGE_OPTS: | |
1437 | image_opts = true; | |
1438 | break; | |
1439 | } | |
1440 | } | |
1441 | ||
1442 | /* Progress is not shown in Quiet mode */ | |
1443 | if (quiet) { | |
1444 | progress = false; | |
1445 | } | |
1446 | ||
1447 | ||
1448 | if (optind != argc - 2) { | |
1449 | error_exit("Expecting two image file names"); | |
1450 | } | |
1451 | filename1 = argv[optind++]; | |
1452 | filename2 = argv[optind++]; | |
1453 | ||
1454 | if (qemu_opts_foreach(&qemu_object_opts, | |
1455 | user_creatable_add_opts_foreach, | |
1456 | qemu_img_object_print_help, &error_fatal)) { | |
1457 | ret = 2; | |
1458 | goto out4; | |
1459 | } | |
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, buf1, chunk); | |
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, buf2, chunk); | |
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, &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 | out4: | |
1646 | return ret; | |
1647 | } | |
1648 | ||
1649 | /* Convenience wrapper around qmp_block_dirty_bitmap_merge */ | |
1650 | static void do_dirty_bitmap_merge(const char *dst_node, const char *dst_name, | |
1651 | const char *src_node, const char *src_name, | |
1652 | Error **errp) | |
1653 | { | |
1654 | BlockDirtyBitmapMergeSource *merge_src; | |
1655 | BlockDirtyBitmapMergeSourceList *list; | |
1656 | ||
1657 | merge_src = g_new0(BlockDirtyBitmapMergeSource, 1); | |
1658 | merge_src->type = QTYPE_QDICT; | |
1659 | merge_src->u.external.node = g_strdup(src_node); | |
1660 | merge_src->u.external.name = g_strdup(src_name); | |
1661 | list = g_new0(BlockDirtyBitmapMergeSourceList, 1); | |
1662 | list->value = merge_src; | |
1663 | qmp_block_dirty_bitmap_merge(dst_node, dst_name, list, errp); | |
1664 | qapi_free_BlockDirtyBitmapMergeSourceList(list); | |
1665 | } | |
1666 | ||
1667 | enum ImgConvertBlockStatus { | |
1668 | BLK_DATA, | |
1669 | BLK_ZERO, | |
1670 | BLK_BACKING_FILE, | |
1671 | }; | |
1672 | ||
1673 | #define MAX_COROUTINES 16 | |
1674 | #define CONVERT_THROTTLE_GROUP "img_convert" | |
1675 | ||
1676 | typedef struct ImgConvertState { | |
1677 | BlockBackend **src; | |
1678 | int64_t *src_sectors; | |
1679 | int *src_alignment; | |
1680 | int src_num; | |
1681 | int64_t total_sectors; | |
1682 | int64_t allocated_sectors; | |
1683 | int64_t allocated_done; | |
1684 | int64_t sector_num; | |
1685 | int64_t wr_offs; | |
1686 | enum ImgConvertBlockStatus status; | |
1687 | int64_t sector_next_status; | |
1688 | BlockBackend *target; | |
1689 | bool has_zero_init; | |
1690 | bool compressed; | |
1691 | bool target_is_new; | |
1692 | bool target_has_backing; | |
1693 | int64_t target_backing_sectors; /* negative if unknown */ | |
1694 | bool wr_in_order; | |
1695 | bool copy_range; | |
1696 | bool salvage; | |
1697 | bool quiet; | |
1698 | int min_sparse; | |
1699 | int alignment; | |
1700 | size_t cluster_sectors; | |
1701 | size_t buf_sectors; | |
1702 | long num_coroutines; | |
1703 | int running_coroutines; | |
1704 | Coroutine *co[MAX_COROUTINES]; | |
1705 | int64_t wait_sector_num[MAX_COROUTINES]; | |
1706 | CoMutex lock; | |
1707 | int ret; | |
1708 | } ImgConvertState; | |
1709 | ||
1710 | static void convert_select_part(ImgConvertState *s, int64_t sector_num, | |
1711 | int *src_cur, int64_t *src_cur_offset) | |
1712 | { | |
1713 | *src_cur = 0; | |
1714 | *src_cur_offset = 0; | |
1715 | while (sector_num - *src_cur_offset >= s->src_sectors[*src_cur]) { | |
1716 | *src_cur_offset += s->src_sectors[*src_cur]; | |
1717 | (*src_cur)++; | |
1718 | assert(*src_cur < s->src_num); | |
1719 | } | |
1720 | } | |
1721 | ||
1722 | static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num) | |
1723 | { | |
1724 | int64_t src_cur_offset; | |
1725 | int ret, n, src_cur; | |
1726 | bool post_backing_zero = false; | |
1727 | ||
1728 | convert_select_part(s, sector_num, &src_cur, &src_cur_offset); | |
1729 | ||
1730 | assert(s->total_sectors > sector_num); | |
1731 | n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS); | |
1732 | ||
1733 | if (s->target_backing_sectors >= 0) { | |
1734 | if (sector_num >= s->target_backing_sectors) { | |
1735 | post_backing_zero = true; | |
1736 | } else if (sector_num + n > s->target_backing_sectors) { | |
1737 | /* Split requests around target_backing_sectors (because | |
1738 | * starting from there, zeros are handled differently) */ | |
1739 | n = s->target_backing_sectors - sector_num; | |
1740 | } | |
1741 | } | |
1742 | ||
1743 | if (s->sector_next_status <= sector_num) { | |
1744 | uint64_t offset = (sector_num - src_cur_offset) * BDRV_SECTOR_SIZE; | |
1745 | int64_t count; | |
1746 | int tail; | |
1747 | BlockDriverState *src_bs = blk_bs(s->src[src_cur]); | |
1748 | BlockDriverState *base; | |
1749 | ||
1750 | if (s->target_has_backing) { | |
1751 | base = bdrv_cow_bs(bdrv_skip_filters(src_bs)); | |
1752 | } else { | |
1753 | base = NULL; | |
1754 | } | |
1755 | ||
1756 | do { | |
1757 | count = n * BDRV_SECTOR_SIZE; | |
1758 | ||
1759 | ret = bdrv_block_status_above(src_bs, base, offset, count, &count, | |
1760 | NULL, NULL); | |
1761 | ||
1762 | if (ret < 0) { | |
1763 | if (s->salvage) { | |
1764 | if (n == 1) { | |
1765 | if (!s->quiet) { | |
1766 | warn_report("error while reading block status at " | |
1767 | "offset %" PRIu64 ": %s", offset, | |
1768 | strerror(-ret)); | |
1769 | } | |
1770 | /* Just try to read the data, then */ | |
1771 | ret = BDRV_BLOCK_DATA; | |
1772 | count = BDRV_SECTOR_SIZE; | |
1773 | } else { | |
1774 | /* Retry on a shorter range */ | |
1775 | n = DIV_ROUND_UP(n, 4); | |
1776 | } | |
1777 | } else { | |
1778 | error_report("error while reading block status at offset " | |
1779 | "%" PRIu64 ": %s", offset, strerror(-ret)); | |
1780 | return ret; | |
1781 | } | |
1782 | } | |
1783 | } while (ret < 0); | |
1784 | ||
1785 | n = DIV_ROUND_UP(count, BDRV_SECTOR_SIZE); | |
1786 | ||
1787 | /* | |
1788 | * Avoid that s->sector_next_status becomes unaligned to the source | |
1789 | * request alignment and/or cluster size to avoid unnecessary read | |
1790 | * cycles. | |
1791 | */ | |
1792 | tail = (sector_num - src_cur_offset + n) % s->src_alignment[src_cur]; | |
1793 | if (n > tail) { | |
1794 | n -= tail; | |
1795 | } | |
1796 | ||
1797 | if (ret & BDRV_BLOCK_ZERO) { | |
1798 | s->status = post_backing_zero ? BLK_BACKING_FILE : BLK_ZERO; | |
1799 | } else if (ret & BDRV_BLOCK_DATA) { | |
1800 | s->status = BLK_DATA; | |
1801 | } else { | |
1802 | s->status = s->target_has_backing ? BLK_BACKING_FILE : BLK_DATA; | |
1803 | } | |
1804 | ||
1805 | s->sector_next_status = sector_num + n; | |
1806 | } | |
1807 | ||
1808 | n = MIN(n, s->sector_next_status - sector_num); | |
1809 | if (s->status == BLK_DATA) { | |
1810 | n = MIN(n, s->buf_sectors); | |
1811 | } | |
1812 | ||
1813 | /* We need to write complete clusters for compressed images, so if an | |
1814 | * unallocated area is shorter than that, we must consider the whole | |
1815 | * cluster allocated. */ | |
1816 | if (s->compressed) { | |
1817 | if (n < s->cluster_sectors) { | |
1818 | n = MIN(s->cluster_sectors, s->total_sectors - sector_num); | |
1819 | s->status = BLK_DATA; | |
1820 | } else { | |
1821 | n = QEMU_ALIGN_DOWN(n, s->cluster_sectors); | |
1822 | } | |
1823 | } | |
1824 | ||
1825 | return n; | |
1826 | } | |
1827 | ||
1828 | static int coroutine_fn convert_co_read(ImgConvertState *s, int64_t sector_num, | |
1829 | int nb_sectors, uint8_t *buf) | |
1830 | { | |
1831 | uint64_t single_read_until = 0; | |
1832 | int n, ret; | |
1833 | ||
1834 | assert(nb_sectors <= s->buf_sectors); | |
1835 | while (nb_sectors > 0) { | |
1836 | BlockBackend *blk; | |
1837 | int src_cur; | |
1838 | int64_t bs_sectors, src_cur_offset; | |
1839 | uint64_t offset; | |
1840 | ||
1841 | /* In the case of compression with multiple source files, we can get a | |
1842 | * nb_sectors that spreads into the next part. So we must be able to | |
1843 | * read across multiple BDSes for one convert_read() call. */ | |
1844 | convert_select_part(s, sector_num, &src_cur, &src_cur_offset); | |
1845 | blk = s->src[src_cur]; | |
1846 | bs_sectors = s->src_sectors[src_cur]; | |
1847 | ||
1848 | offset = (sector_num - src_cur_offset) << BDRV_SECTOR_BITS; | |
1849 | ||
1850 | n = MIN(nb_sectors, bs_sectors - (sector_num - src_cur_offset)); | |
1851 | if (single_read_until > offset) { | |
1852 | n = 1; | |
1853 | } | |
1854 | ||
1855 | ret = blk_co_pread(blk, offset, n << BDRV_SECTOR_BITS, buf, 0); | |
1856 | if (ret < 0) { | |
1857 | if (s->salvage) { | |
1858 | if (n > 1) { | |
1859 | single_read_until = offset + (n << BDRV_SECTOR_BITS); | |
1860 | continue; | |
1861 | } else { | |
1862 | if (!s->quiet) { | |
1863 | warn_report("error while reading offset %" PRIu64 | |
1864 | ": %s", offset, strerror(-ret)); | |
1865 | } | |
1866 | memset(buf, 0, BDRV_SECTOR_SIZE); | |
1867 | } | |
1868 | } else { | |
1869 | return ret; | |
1870 | } | |
1871 | } | |
1872 | ||
1873 | sector_num += n; | |
1874 | nb_sectors -= n; | |
1875 | buf += n * BDRV_SECTOR_SIZE; | |
1876 | } | |
1877 | ||
1878 | return 0; | |
1879 | } | |
1880 | ||
1881 | ||
1882 | static int coroutine_fn convert_co_write(ImgConvertState *s, int64_t sector_num, | |
1883 | int nb_sectors, uint8_t *buf, | |
1884 | enum ImgConvertBlockStatus status) | |
1885 | { | |
1886 | int ret; | |
1887 | ||
1888 | while (nb_sectors > 0) { | |
1889 | int n = nb_sectors; | |
1890 | BdrvRequestFlags flags = s->compressed ? BDRV_REQ_WRITE_COMPRESSED : 0; | |
1891 | ||
1892 | switch (status) { | |
1893 | case BLK_BACKING_FILE: | |
1894 | /* If we have a backing file, leave clusters unallocated that are | |
1895 | * unallocated in the source image, so that the backing file is | |
1896 | * visible at the respective offset. */ | |
1897 | assert(s->target_has_backing); | |
1898 | break; | |
1899 | ||
1900 | case BLK_DATA: | |
1901 | /* If we're told to keep the target fully allocated (-S 0) or there | |
1902 | * is real non-zero data, we must write it. Otherwise we can treat | |
1903 | * it as zero sectors. | |
1904 | * Compressed clusters need to be written as a whole, so in that | |
1905 | * case we can only save the write if the buffer is completely | |
1906 | * zeroed. */ | |
1907 | if (!s->min_sparse || | |
1908 | (!s->compressed && | |
1909 | is_allocated_sectors_min(buf, n, &n, s->min_sparse, | |
1910 | sector_num, s->alignment)) || | |
1911 | (s->compressed && | |
1912 | !buffer_is_zero(buf, n * BDRV_SECTOR_SIZE))) | |
1913 | { | |
1914 | ret = blk_co_pwrite(s->target, sector_num << BDRV_SECTOR_BITS, | |
1915 | n << BDRV_SECTOR_BITS, buf, flags); | |
1916 | if (ret < 0) { | |
1917 | return ret; | |
1918 | } | |
1919 | break; | |
1920 | } | |
1921 | /* fall-through */ | |
1922 | ||
1923 | case BLK_ZERO: | |
1924 | if (s->has_zero_init) { | |
1925 | assert(!s->target_has_backing); | |
1926 | break; | |
1927 | } | |
1928 | ret = blk_co_pwrite_zeroes(s->target, | |
1929 | sector_num << BDRV_SECTOR_BITS, | |
1930 | n << BDRV_SECTOR_BITS, | |
1931 | BDRV_REQ_MAY_UNMAP); | |
1932 | if (ret < 0) { | |
1933 | return ret; | |
1934 | } | |
1935 | break; | |
1936 | } | |
1937 | ||
1938 | sector_num += n; | |
1939 | nb_sectors -= n; | |
1940 | buf += n * BDRV_SECTOR_SIZE; | |
1941 | } | |
1942 | ||
1943 | return 0; | |
1944 | } | |
1945 | ||
1946 | static int coroutine_fn convert_co_copy_range(ImgConvertState *s, int64_t sector_num, | |
1947 | int nb_sectors) | |
1948 | { | |
1949 | int n, ret; | |
1950 | ||
1951 | while (nb_sectors > 0) { | |
1952 | BlockBackend *blk; | |
1953 | int src_cur; | |
1954 | int64_t bs_sectors, src_cur_offset; | |
1955 | int64_t offset; | |
1956 | ||
1957 | convert_select_part(s, sector_num, &src_cur, &src_cur_offset); | |
1958 | offset = (sector_num - src_cur_offset) << BDRV_SECTOR_BITS; | |
1959 | blk = s->src[src_cur]; | |
1960 | bs_sectors = s->src_sectors[src_cur]; | |
1961 | ||
1962 | n = MIN(nb_sectors, bs_sectors - (sector_num - src_cur_offset)); | |
1963 | ||
1964 | ret = blk_co_copy_range(blk, offset, s->target, | |
1965 | sector_num << BDRV_SECTOR_BITS, | |
1966 | n << BDRV_SECTOR_BITS, 0, 0); | |
1967 | if (ret < 0) { | |
1968 | return ret; | |
1969 | } | |
1970 | ||
1971 | sector_num += n; | |
1972 | nb_sectors -= n; | |
1973 | } | |
1974 | return 0; | |
1975 | } | |
1976 | ||
1977 | static void coroutine_fn convert_co_do_copy(void *opaque) | |
1978 | { | |
1979 | ImgConvertState *s = opaque; | |
1980 | uint8_t *buf = NULL; | |
1981 | int ret, i; | |
1982 | int index = -1; | |
1983 | ||
1984 | for (i = 0; i < s->num_coroutines; i++) { | |
1985 | if (s->co[i] == qemu_coroutine_self()) { | |
1986 | index = i; | |
1987 | break; | |
1988 | } | |
1989 | } | |
1990 | assert(index >= 0); | |
1991 | ||
1992 | s->running_coroutines++; | |
1993 | buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE); | |
1994 | ||
1995 | while (1) { | |
1996 | int n; | |
1997 | int64_t sector_num; | |
1998 | enum ImgConvertBlockStatus status; | |
1999 | bool copy_range; | |
2000 | ||
2001 | qemu_co_mutex_lock(&s->lock); | |
2002 | if (s->ret != -EINPROGRESS || s->sector_num >= s->total_sectors) { | |
2003 | qemu_co_mutex_unlock(&s->lock); | |
2004 | break; | |
2005 | } | |
2006 | n = convert_iteration_sectors(s, s->sector_num); | |
2007 | if (n < 0) { | |
2008 | qemu_co_mutex_unlock(&s->lock); | |
2009 | s->ret = n; | |
2010 | break; | |
2011 | } | |
2012 | /* save current sector and allocation status to local variables */ | |
2013 | sector_num = s->sector_num; | |
2014 | status = s->status; | |
2015 | if (!s->min_sparse && s->status == BLK_ZERO) { | |
2016 | n = MIN(n, s->buf_sectors); | |
2017 | } | |
2018 | /* increment global sector counter so that other coroutines can | |
2019 | * already continue reading beyond this request */ | |
2020 | s->sector_num += n; | |
2021 | qemu_co_mutex_unlock(&s->lock); | |
2022 | ||
2023 | if (status == BLK_DATA || (!s->min_sparse && status == BLK_ZERO)) { | |
2024 | s->allocated_done += n; | |
2025 | qemu_progress_print(100.0 * s->allocated_done / | |
2026 | s->allocated_sectors, 0); | |
2027 | } | |
2028 | ||
2029 | retry: | |
2030 | copy_range = s->copy_range && s->status == BLK_DATA; | |
2031 | if (status == BLK_DATA && !copy_range) { | |
2032 | ret = convert_co_read(s, sector_num, n, buf); | |
2033 | if (ret < 0) { | |
2034 | error_report("error while reading at byte %lld: %s", | |
2035 | sector_num * BDRV_SECTOR_SIZE, strerror(-ret)); | |
2036 | s->ret = ret; | |
2037 | } | |
2038 | } else if (!s->min_sparse && status == BLK_ZERO) { | |
2039 | status = BLK_DATA; | |
2040 | memset(buf, 0x00, n * BDRV_SECTOR_SIZE); | |
2041 | } | |
2042 | ||
2043 | if (s->wr_in_order) { | |
2044 | /* keep writes in order */ | |
2045 | while (s->wr_offs != sector_num && s->ret == -EINPROGRESS) { | |
2046 | s->wait_sector_num[index] = sector_num; | |
2047 | qemu_coroutine_yield(); | |
2048 | } | |
2049 | s->wait_sector_num[index] = -1; | |
2050 | } | |
2051 | ||
2052 | if (s->ret == -EINPROGRESS) { | |
2053 | if (copy_range) { | |
2054 | ret = convert_co_copy_range(s, sector_num, n); | |
2055 | if (ret) { | |
2056 | s->copy_range = false; | |
2057 | goto retry; | |
2058 | } | |
2059 | } else { | |
2060 | ret = convert_co_write(s, sector_num, n, buf, status); | |
2061 | } | |
2062 | if (ret < 0) { | |
2063 | error_report("error while writing at byte %lld: %s", | |
2064 | sector_num * BDRV_SECTOR_SIZE, strerror(-ret)); | |
2065 | s->ret = ret; | |
2066 | } | |
2067 | } | |
2068 | ||
2069 | if (s->wr_in_order) { | |
2070 | /* reenter the coroutine that might have waited | |
2071 | * for this write to complete */ | |
2072 | s->wr_offs = sector_num + n; | |
2073 | for (i = 0; i < s->num_coroutines; i++) { | |
2074 | if (s->co[i] && s->wait_sector_num[i] == s->wr_offs) { | |
2075 | /* | |
2076 | * A -> B -> A cannot occur because A has | |
2077 | * s->wait_sector_num[i] == -1 during A -> B. Therefore | |
2078 | * B will never enter A during this time window. | |
2079 | */ | |
2080 | qemu_coroutine_enter(s->co[i]); | |
2081 | break; | |
2082 | } | |
2083 | } | |
2084 | } | |
2085 | } | |
2086 | ||
2087 | qemu_vfree(buf); | |
2088 | s->co[index] = NULL; | |
2089 | s->running_coroutines--; | |
2090 | if (!s->running_coroutines && s->ret == -EINPROGRESS) { | |
2091 | /* the convert job finished successfully */ | |
2092 | s->ret = 0; | |
2093 | } | |
2094 | } | |
2095 | ||
2096 | static int convert_do_copy(ImgConvertState *s) | |
2097 | { | |
2098 | int ret, i, n; | |
2099 | int64_t sector_num = 0; | |
2100 | ||
2101 | /* Check whether we have zero initialisation or can get it efficiently */ | |
2102 | if (!s->has_zero_init && s->target_is_new && s->min_sparse && | |
2103 | !s->target_has_backing) { | |
2104 | s->has_zero_init = bdrv_has_zero_init(blk_bs(s->target)); | |
2105 | } | |
2106 | ||
2107 | /* Allocate buffer for copied data. For compressed images, only one cluster | |
2108 | * can be copied at a time. */ | |
2109 | if (s->compressed) { | |
2110 | if (s->cluster_sectors <= 0 || s->cluster_sectors > s->buf_sectors) { | |
2111 | error_report("invalid cluster size"); | |
2112 | return -EINVAL; | |
2113 | } | |
2114 | s->buf_sectors = s->cluster_sectors; | |
2115 | } | |
2116 | ||
2117 | while (sector_num < s->total_sectors) { | |
2118 | n = convert_iteration_sectors(s, sector_num); | |
2119 | if (n < 0) { | |
2120 | return n; | |
2121 | } | |
2122 | if (s->status == BLK_DATA || (!s->min_sparse && s->status == BLK_ZERO)) | |
2123 | { | |
2124 | s->allocated_sectors += n; | |
2125 | } | |
2126 | sector_num += n; | |
2127 | } | |
2128 | ||
2129 | /* Do the copy */ | |
2130 | s->sector_next_status = 0; | |
2131 | s->ret = -EINPROGRESS; | |
2132 | ||
2133 | qemu_co_mutex_init(&s->lock); | |
2134 | for (i = 0; i < s->num_coroutines; i++) { | |
2135 | s->co[i] = qemu_coroutine_create(convert_co_do_copy, s); | |
2136 | s->wait_sector_num[i] = -1; | |
2137 | qemu_coroutine_enter(s->co[i]); | |
2138 | } | |
2139 | ||
2140 | while (s->running_coroutines) { | |
2141 | main_loop_wait(false); | |
2142 | } | |
2143 | ||
2144 | if (s->compressed && !s->ret) { | |
2145 | /* signal EOF to align */ | |
2146 | ret = blk_pwrite_compressed(s->target, 0, NULL, 0); | |
2147 | if (ret < 0) { | |
2148 | return ret; | |
2149 | } | |
2150 | } | |
2151 | ||
2152 | return s->ret; | |
2153 | } | |
2154 | ||
2155 | static int convert_copy_bitmaps(BlockDriverState *src, BlockDriverState *dst) | |
2156 | { | |
2157 | BdrvDirtyBitmap *bm; | |
2158 | Error *err = NULL; | |
2159 | ||
2160 | FOR_EACH_DIRTY_BITMAP(src, bm) { | |
2161 | const char *name; | |
2162 | ||
2163 | if (!bdrv_dirty_bitmap_get_persistence(bm)) { | |
2164 | continue; | |
2165 | } | |
2166 | name = bdrv_dirty_bitmap_name(bm); | |
2167 | qmp_block_dirty_bitmap_add(dst->node_name, name, | |
2168 | true, bdrv_dirty_bitmap_granularity(bm), | |
2169 | true, true, | |
2170 | true, !bdrv_dirty_bitmap_enabled(bm), | |
2171 | &err); | |
2172 | if (err) { | |
2173 | error_reportf_err(err, "Failed to create bitmap %s: ", name); | |
2174 | return -1; | |
2175 | } | |
2176 | ||
2177 | do_dirty_bitmap_merge(dst->node_name, name, src->node_name, name, | |
2178 | &err); | |
2179 | if (err) { | |
2180 | error_reportf_err(err, "Failed to populate bitmap %s: ", name); | |
2181 | return -1; | |
2182 | } | |
2183 | } | |
2184 | ||
2185 | return 0; | |
2186 | } | |
2187 | ||
2188 | #define MAX_BUF_SECTORS 32768 | |
2189 | ||
2190 | static void set_rate_limit(BlockBackend *blk, int64_t rate_limit) | |
2191 | { | |
2192 | ThrottleConfig cfg; | |
2193 | ||
2194 | throttle_config_init(&cfg); | |
2195 | cfg.buckets[THROTTLE_BPS_WRITE].avg = rate_limit; | |
2196 | ||
2197 | blk_io_limits_enable(blk, CONVERT_THROTTLE_GROUP); | |
2198 | blk_set_io_limits(blk, &cfg); | |
2199 | } | |
2200 | ||
2201 | static int img_convert(int argc, char **argv) | |
2202 | { | |
2203 | int c, bs_i, flags, src_flags = 0; | |
2204 | const char *fmt = NULL, *out_fmt = NULL, *cache = "unsafe", | |
2205 | *src_cache = BDRV_DEFAULT_CACHE, *out_baseimg = NULL, | |
2206 | *out_filename, *out_baseimg_param, *snapshot_name = NULL; | |
2207 | BlockDriver *drv = NULL, *proto_drv = NULL; | |
2208 | BlockDriverInfo bdi; | |
2209 | BlockDriverState *out_bs; | |
2210 | QemuOpts *opts = NULL, *sn_opts = NULL; | |
2211 | QemuOptsList *create_opts = NULL; | |
2212 | QDict *open_opts = NULL; | |
2213 | char *options = NULL; | |
2214 | Error *local_err = NULL; | |
2215 | bool writethrough, src_writethrough, image_opts = false, | |
2216 | skip_create = false, progress = false, tgt_image_opts = false; | |
2217 | int64_t ret = -EINVAL; | |
2218 | bool force_share = false; | |
2219 | bool explict_min_sparse = false; | |
2220 | bool bitmaps = false; | |
2221 | int64_t rate_limit = 0; | |
2222 | ||
2223 | ImgConvertState s = (ImgConvertState) { | |
2224 | /* Need at least 4k of zeros for sparse detection */ | |
2225 | .min_sparse = 8, | |
2226 | .copy_range = false, | |
2227 | .buf_sectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE, | |
2228 | .wr_in_order = true, | |
2229 | .num_coroutines = 8, | |
2230 | }; | |
2231 | ||
2232 | for(;;) { | |
2233 | static const struct option long_options[] = { | |
2234 | {"help", no_argument, 0, 'h'}, | |
2235 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2236 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2237 | {"force-share", no_argument, 0, 'U'}, | |
2238 | {"target-image-opts", no_argument, 0, OPTION_TARGET_IMAGE_OPTS}, | |
2239 | {"salvage", no_argument, 0, OPTION_SALVAGE}, | |
2240 | {"target-is-zero", no_argument, 0, OPTION_TARGET_IS_ZERO}, | |
2241 | {"bitmaps", no_argument, 0, OPTION_BITMAPS}, | |
2242 | {0, 0, 0, 0} | |
2243 | }; | |
2244 | c = getopt_long(argc, argv, ":hf:O:B:Cco:l:S:pt:T:qnm:WUr:", | |
2245 | long_options, NULL); | |
2246 | if (c == -1) { | |
2247 | break; | |
2248 | } | |
2249 | switch(c) { | |
2250 | case ':': | |
2251 | missing_argument(argv[optind - 1]); | |
2252 | break; | |
2253 | case '?': | |
2254 | unrecognized_option(argv[optind - 1]); | |
2255 | break; | |
2256 | case 'h': | |
2257 | help(); | |
2258 | break; | |
2259 | case 'f': | |
2260 | fmt = optarg; | |
2261 | break; | |
2262 | case 'O': | |
2263 | out_fmt = optarg; | |
2264 | break; | |
2265 | case 'B': | |
2266 | out_baseimg = optarg; | |
2267 | break; | |
2268 | case 'C': | |
2269 | s.copy_range = true; | |
2270 | break; | |
2271 | case 'c': | |
2272 | s.compressed = true; | |
2273 | break; | |
2274 | case 'o': | |
2275 | if (accumulate_options(&options, optarg) < 0) { | |
2276 | goto fail_getopt; | |
2277 | } | |
2278 | break; | |
2279 | case 'l': | |
2280 | if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { | |
2281 | sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, | |
2282 | optarg, false); | |
2283 | if (!sn_opts) { | |
2284 | error_report("Failed in parsing snapshot param '%s'", | |
2285 | optarg); | |
2286 | goto fail_getopt; | |
2287 | } | |
2288 | } else { | |
2289 | snapshot_name = optarg; | |
2290 | } | |
2291 | break; | |
2292 | case 'S': | |
2293 | { | |
2294 | int64_t sval; | |
2295 | ||
2296 | sval = cvtnum("buffer size for sparse output", optarg); | |
2297 | if (sval < 0) { | |
2298 | goto fail_getopt; | |
2299 | } else if (!QEMU_IS_ALIGNED(sval, BDRV_SECTOR_SIZE) || | |
2300 | sval / BDRV_SECTOR_SIZE > MAX_BUF_SECTORS) { | |
2301 | error_report("Invalid buffer size for sparse output specified. " | |
2302 | "Valid sizes are multiples of %llu up to %llu. Select " | |
2303 | "0 to disable sparse detection (fully allocates output).", | |
2304 | BDRV_SECTOR_SIZE, MAX_BUF_SECTORS * BDRV_SECTOR_SIZE); | |
2305 | goto fail_getopt; | |
2306 | } | |
2307 | ||
2308 | s.min_sparse = sval / BDRV_SECTOR_SIZE; | |
2309 | explict_min_sparse = true; | |
2310 | break; | |
2311 | } | |
2312 | case 'p': | |
2313 | progress = true; | |
2314 | break; | |
2315 | case 't': | |
2316 | cache = optarg; | |
2317 | break; | |
2318 | case 'T': | |
2319 | src_cache = optarg; | |
2320 | break; | |
2321 | case 'q': | |
2322 | s.quiet = true; | |
2323 | break; | |
2324 | case 'n': | |
2325 | skip_create = true; | |
2326 | break; | |
2327 | case 'm': | |
2328 | if (qemu_strtol(optarg, NULL, 0, &s.num_coroutines) || | |
2329 | s.num_coroutines < 1 || s.num_coroutines > MAX_COROUTINES) { | |
2330 | error_report("Invalid number of coroutines. Allowed number of" | |
2331 | " coroutines is between 1 and %d", MAX_COROUTINES); | |
2332 | goto fail_getopt; | |
2333 | } | |
2334 | break; | |
2335 | case 'W': | |
2336 | s.wr_in_order = false; | |
2337 | break; | |
2338 | case 'U': | |
2339 | force_share = true; | |
2340 | break; | |
2341 | case 'r': | |
2342 | rate_limit = cvtnum("rate limit", optarg); | |
2343 | if (rate_limit < 0) { | |
2344 | goto fail_getopt; | |
2345 | } | |
2346 | break; | |
2347 | case OPTION_OBJECT: { | |
2348 | QemuOpts *object_opts; | |
2349 | object_opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
2350 | optarg, true); | |
2351 | if (!object_opts) { | |
2352 | goto fail_getopt; | |
2353 | } | |
2354 | break; | |
2355 | } | |
2356 | case OPTION_IMAGE_OPTS: | |
2357 | image_opts = true; | |
2358 | break; | |
2359 | case OPTION_SALVAGE: | |
2360 | s.salvage = true; | |
2361 | break; | |
2362 | case OPTION_TARGET_IMAGE_OPTS: | |
2363 | tgt_image_opts = true; | |
2364 | break; | |
2365 | case OPTION_TARGET_IS_ZERO: | |
2366 | /* | |
2367 | * The user asserting that the target is blank has the | |
2368 | * same effect as the target driver supporting zero | |
2369 | * initialisation. | |
2370 | */ | |
2371 | s.has_zero_init = true; | |
2372 | break; | |
2373 | case OPTION_BITMAPS: | |
2374 | bitmaps = true; | |
2375 | break; | |
2376 | } | |
2377 | } | |
2378 | ||
2379 | if (!out_fmt && !tgt_image_opts) { | |
2380 | out_fmt = "raw"; | |
2381 | } | |
2382 | ||
2383 | if (qemu_opts_foreach(&qemu_object_opts, | |
2384 | user_creatable_add_opts_foreach, | |
2385 | qemu_img_object_print_help, &error_fatal)) { | |
2386 | goto fail_getopt; | |
2387 | } | |
2388 | ||
2389 | if (s.compressed && s.copy_range) { | |
2390 | error_report("Cannot enable copy offloading when -c is used"); | |
2391 | goto fail_getopt; | |
2392 | } | |
2393 | ||
2394 | if (explict_min_sparse && s.copy_range) { | |
2395 | error_report("Cannot enable copy offloading when -S is used"); | |
2396 | goto fail_getopt; | |
2397 | } | |
2398 | ||
2399 | if (s.copy_range && s.salvage) { | |
2400 | error_report("Cannot use copy offloading in salvaging mode"); | |
2401 | goto fail_getopt; | |
2402 | } | |
2403 | ||
2404 | if (tgt_image_opts && !skip_create) { | |
2405 | error_report("--target-image-opts requires use of -n flag"); | |
2406 | goto fail_getopt; | |
2407 | } | |
2408 | ||
2409 | if (skip_create && options) { | |
2410 | error_report("-o has no effect when skipping image creation"); | |
2411 | goto fail_getopt; | |
2412 | } | |
2413 | ||
2414 | if (s.has_zero_init && !skip_create) { | |
2415 | error_report("--target-is-zero requires use of -n flag"); | |
2416 | goto fail_getopt; | |
2417 | } | |
2418 | ||
2419 | s.src_num = argc - optind - 1; | |
2420 | out_filename = s.src_num >= 1 ? argv[argc - 1] : NULL; | |
2421 | ||
2422 | if (options && has_help_option(options)) { | |
2423 | if (out_fmt) { | |
2424 | ret = print_block_option_help(out_filename, out_fmt); | |
2425 | goto fail_getopt; | |
2426 | } else { | |
2427 | error_report("Option help requires a format be specified"); | |
2428 | goto fail_getopt; | |
2429 | } | |
2430 | } | |
2431 | ||
2432 | if (s.src_num < 1) { | |
2433 | error_report("Must specify image file name"); | |
2434 | goto fail_getopt; | |
2435 | } | |
2436 | ||
2437 | /* ret is still -EINVAL until here */ | |
2438 | ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough); | |
2439 | if (ret < 0) { | |
2440 | error_report("Invalid source cache option: %s", src_cache); | |
2441 | goto fail_getopt; | |
2442 | } | |
2443 | ||
2444 | /* Initialize before goto out */ | |
2445 | if (s.quiet) { | |
2446 | progress = false; | |
2447 | } | |
2448 | qemu_progress_init(progress, 1.0); | |
2449 | qemu_progress_print(0, 100); | |
2450 | ||
2451 | s.src = g_new0(BlockBackend *, s.src_num); | |
2452 | s.src_sectors = g_new(int64_t, s.src_num); | |
2453 | s.src_alignment = g_new(int, s.src_num); | |
2454 | ||
2455 | for (bs_i = 0; bs_i < s.src_num; bs_i++) { | |
2456 | BlockDriverState *src_bs; | |
2457 | s.src[bs_i] = img_open(image_opts, argv[optind + bs_i], | |
2458 | fmt, src_flags, src_writethrough, s.quiet, | |
2459 | force_share); | |
2460 | if (!s.src[bs_i]) { | |
2461 | ret = -1; | |
2462 | goto out; | |
2463 | } | |
2464 | s.src_sectors[bs_i] = blk_nb_sectors(s.src[bs_i]); | |
2465 | if (s.src_sectors[bs_i] < 0) { | |
2466 | error_report("Could not get size of %s: %s", | |
2467 | argv[optind + bs_i], strerror(-s.src_sectors[bs_i])); | |
2468 | ret = -1; | |
2469 | goto out; | |
2470 | } | |
2471 | src_bs = blk_bs(s.src[bs_i]); | |
2472 | s.src_alignment[bs_i] = DIV_ROUND_UP(src_bs->bl.request_alignment, | |
2473 | BDRV_SECTOR_SIZE); | |
2474 | if (!bdrv_get_info(src_bs, &bdi)) { | |
2475 | s.src_alignment[bs_i] = MAX(s.src_alignment[bs_i], | |
2476 | bdi.cluster_size / BDRV_SECTOR_SIZE); | |
2477 | } | |
2478 | s.total_sectors += s.src_sectors[bs_i]; | |
2479 | } | |
2480 | ||
2481 | if (sn_opts) { | |
2482 | bdrv_snapshot_load_tmp(blk_bs(s.src[0]), | |
2483 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), | |
2484 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), | |
2485 | &local_err); | |
2486 | } else if (snapshot_name != NULL) { | |
2487 | if (s.src_num > 1) { | |
2488 | error_report("No support for concatenating multiple snapshot"); | |
2489 | ret = -1; | |
2490 | goto out; | |
2491 | } | |
2492 | ||
2493 | bdrv_snapshot_load_tmp_by_id_or_name(blk_bs(s.src[0]), snapshot_name, | |
2494 | &local_err); | |
2495 | } | |
2496 | if (local_err) { | |
2497 | error_reportf_err(local_err, "Failed to load snapshot: "); | |
2498 | ret = -1; | |
2499 | goto out; | |
2500 | } | |
2501 | ||
2502 | if (!skip_create) { | |
2503 | /* Find driver and parse its options */ | |
2504 | drv = bdrv_find_format(out_fmt); | |
2505 | if (!drv) { | |
2506 | error_report("Unknown file format '%s'", out_fmt); | |
2507 | ret = -1; | |
2508 | goto out; | |
2509 | } | |
2510 | ||
2511 | proto_drv = bdrv_find_protocol(out_filename, true, &local_err); | |
2512 | if (!proto_drv) { | |
2513 | error_report_err(local_err); | |
2514 | ret = -1; | |
2515 | goto out; | |
2516 | } | |
2517 | ||
2518 | if (!drv->create_opts) { | |
2519 | error_report("Format driver '%s' does not support image creation", | |
2520 | drv->format_name); | |
2521 | ret = -1; | |
2522 | goto out; | |
2523 | } | |
2524 | ||
2525 | if (!proto_drv->create_opts) { | |
2526 | error_report("Protocol driver '%s' does not support image creation", | |
2527 | proto_drv->format_name); | |
2528 | ret = -1; | |
2529 | goto out; | |
2530 | } | |
2531 | ||
2532 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
2533 | create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); | |
2534 | ||
2535 | opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); | |
2536 | if (options) { | |
2537 | if (!qemu_opts_do_parse(opts, options, NULL, &local_err)) { | |
2538 | error_report_err(local_err); | |
2539 | ret = -1; | |
2540 | goto out; | |
2541 | } | |
2542 | } | |
2543 | ||
2544 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, | |
2545 | s.total_sectors * BDRV_SECTOR_SIZE, &error_abort); | |
2546 | ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL); | |
2547 | if (ret < 0) { | |
2548 | goto out; | |
2549 | } | |
2550 | } | |
2551 | ||
2552 | /* Get backing file name if -o backing_file was used */ | |
2553 | out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); | |
2554 | if (out_baseimg_param) { | |
2555 | out_baseimg = out_baseimg_param; | |
2556 | } | |
2557 | s.target_has_backing = (bool) out_baseimg; | |
2558 | ||
2559 | if (s.has_zero_init && s.target_has_backing) { | |
2560 | error_report("Cannot use --target-is-zero when the destination " | |
2561 | "image has a backing file"); | |
2562 | goto out; | |
2563 | } | |
2564 | ||
2565 | if (s.src_num > 1 && out_baseimg) { | |
2566 | error_report("Having a backing file for the target makes no sense when " | |
2567 | "concatenating multiple input images"); | |
2568 | ret = -1; | |
2569 | goto out; | |
2570 | } | |
2571 | ||
2572 | if (out_baseimg_param) { | |
2573 | if (!qemu_opt_get(opts, BLOCK_OPT_BACKING_FMT)) { | |
2574 | warn_report("Deprecated use of backing file without explicit " | |
2575 | "backing format"); | |
2576 | } | |
2577 | } | |
2578 | ||
2579 | /* Check if compression is supported */ | |
2580 | if (s.compressed) { | |
2581 | bool encryption = | |
2582 | qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); | |
2583 | const char *encryptfmt = | |
2584 | qemu_opt_get(opts, BLOCK_OPT_ENCRYPT_FORMAT); | |
2585 | const char *preallocation = | |
2586 | qemu_opt_get(opts, BLOCK_OPT_PREALLOC); | |
2587 | ||
2588 | if (drv && !block_driver_can_compress(drv)) { | |
2589 | error_report("Compression not supported for this file format"); | |
2590 | ret = -1; | |
2591 | goto out; | |
2592 | } | |
2593 | ||
2594 | if (encryption || encryptfmt) { | |
2595 | error_report("Compression and encryption not supported at " | |
2596 | "the same time"); | |
2597 | ret = -1; | |
2598 | goto out; | |
2599 | } | |
2600 | ||
2601 | if (preallocation | |
2602 | && strcmp(preallocation, "off")) | |
2603 | { | |
2604 | error_report("Compression and preallocation not supported at " | |
2605 | "the same time"); | |
2606 | ret = -1; | |
2607 | goto out; | |
2608 | } | |
2609 | } | |
2610 | ||
2611 | /* Determine if bitmaps need copying */ | |
2612 | if (bitmaps) { | |
2613 | if (s.src_num > 1) { | |
2614 | error_report("Copying bitmaps only possible with single source"); | |
2615 | ret = -1; | |
2616 | goto out; | |
2617 | } | |
2618 | if (!bdrv_supports_persistent_dirty_bitmap(blk_bs(s.src[0]))) { | |
2619 | error_report("Source lacks bitmap support"); | |
2620 | ret = -1; | |
2621 | goto out; | |
2622 | } | |
2623 | } | |
2624 | ||
2625 | /* | |
2626 | * The later open call will need any decryption secrets, and | |
2627 | * bdrv_create() will purge "opts", so extract them now before | |
2628 | * they are lost. | |
2629 | */ | |
2630 | if (!skip_create) { | |
2631 | open_opts = qdict_new(); | |
2632 | qemu_opt_foreach(opts, img_add_key_secrets, open_opts, &error_abort); | |
2633 | ||
2634 | /* Create the new image */ | |
2635 | ret = bdrv_create(drv, out_filename, opts, &local_err); | |
2636 | if (ret < 0) { | |
2637 | error_reportf_err(local_err, "%s: error while converting %s: ", | |
2638 | out_filename, out_fmt); | |
2639 | goto out; | |
2640 | } | |
2641 | } | |
2642 | ||
2643 | s.target_is_new = !skip_create; | |
2644 | ||
2645 | flags = s.min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; | |
2646 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
2647 | if (ret < 0) { | |
2648 | error_report("Invalid cache option: %s", cache); | |
2649 | goto out; | |
2650 | } | |
2651 | ||
2652 | if (skip_create) { | |
2653 | s.target = img_open(tgt_image_opts, out_filename, out_fmt, | |
2654 | flags, writethrough, s.quiet, false); | |
2655 | } else { | |
2656 | /* TODO ultimately we should allow --target-image-opts | |
2657 | * to be used even when -n is not given. | |
2658 | * That has to wait for bdrv_create to be improved | |
2659 | * to allow filenames in option syntax | |
2660 | */ | |
2661 | s.target = img_open_file(out_filename, open_opts, out_fmt, | |
2662 | flags, writethrough, s.quiet, false); | |
2663 | open_opts = NULL; /* blk_new_open will have freed it */ | |
2664 | } | |
2665 | if (!s.target) { | |
2666 | ret = -1; | |
2667 | goto out; | |
2668 | } | |
2669 | out_bs = blk_bs(s.target); | |
2670 | ||
2671 | if (bitmaps && !bdrv_supports_persistent_dirty_bitmap(out_bs)) { | |
2672 | error_report("Format driver '%s' does not support bitmaps", | |
2673 | out_bs->drv->format_name); | |
2674 | ret = -1; | |
2675 | goto out; | |
2676 | } | |
2677 | ||
2678 | if (s.compressed && !block_driver_can_compress(out_bs->drv)) { | |
2679 | error_report("Compression not supported for this file format"); | |
2680 | ret = -1; | |
2681 | goto out; | |
2682 | } | |
2683 | ||
2684 | /* increase bufsectors from the default 4096 (2M) if opt_transfer | |
2685 | * or discard_alignment of the out_bs is greater. Limit to | |
2686 | * MAX_BUF_SECTORS as maximum which is currently 32768 (16MB). */ | |
2687 | s.buf_sectors = MIN(MAX_BUF_SECTORS, | |
2688 | MAX(s.buf_sectors, | |
2689 | MAX(out_bs->bl.opt_transfer >> BDRV_SECTOR_BITS, | |
2690 | out_bs->bl.pdiscard_alignment >> | |
2691 | BDRV_SECTOR_BITS))); | |
2692 | ||
2693 | /* try to align the write requests to the destination to avoid unnecessary | |
2694 | * RMW cycles. */ | |
2695 | s.alignment = MAX(pow2floor(s.min_sparse), | |
2696 | DIV_ROUND_UP(out_bs->bl.request_alignment, | |
2697 | BDRV_SECTOR_SIZE)); | |
2698 | assert(is_power_of_2(s.alignment)); | |
2699 | ||
2700 | if (skip_create) { | |
2701 | int64_t output_sectors = blk_nb_sectors(s.target); | |
2702 | if (output_sectors < 0) { | |
2703 | error_report("unable to get output image length: %s", | |
2704 | strerror(-output_sectors)); | |
2705 | ret = -1; | |
2706 | goto out; | |
2707 | } else if (output_sectors < s.total_sectors) { | |
2708 | error_report("output file is smaller than input file"); | |
2709 | ret = -1; | |
2710 | goto out; | |
2711 | } | |
2712 | } | |
2713 | ||
2714 | if (s.target_has_backing && s.target_is_new) { | |
2715 | /* Errors are treated as "backing length unknown" (which means | |
2716 | * s.target_backing_sectors has to be negative, which it will | |
2717 | * be automatically). The backing file length is used only | |
2718 | * for optimizations, so such a case is not fatal. */ | |
2719 | s.target_backing_sectors = | |
2720 | bdrv_nb_sectors(bdrv_backing_chain_next(out_bs)); | |
2721 | } else { | |
2722 | s.target_backing_sectors = -1; | |
2723 | } | |
2724 | ||
2725 | ret = bdrv_get_info(out_bs, &bdi); | |
2726 | if (ret < 0) { | |
2727 | if (s.compressed) { | |
2728 | error_report("could not get block driver info"); | |
2729 | goto out; | |
2730 | } | |
2731 | } else { | |
2732 | s.compressed = s.compressed || bdi.needs_compressed_writes; | |
2733 | s.cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; | |
2734 | } | |
2735 | ||
2736 | if (rate_limit) { | |
2737 | set_rate_limit(s.target, rate_limit); | |
2738 | } | |
2739 | ||
2740 | ret = convert_do_copy(&s); | |
2741 | ||
2742 | /* Now copy the bitmaps */ | |
2743 | if (bitmaps && ret == 0) { | |
2744 | ret = convert_copy_bitmaps(blk_bs(s.src[0]), out_bs); | |
2745 | } | |
2746 | ||
2747 | out: | |
2748 | if (!ret) { | |
2749 | qemu_progress_print(100, 0); | |
2750 | } | |
2751 | qemu_progress_end(); | |
2752 | qemu_opts_del(opts); | |
2753 | qemu_opts_free(create_opts); | |
2754 | qemu_opts_del(sn_opts); | |
2755 | qobject_unref(open_opts); | |
2756 | blk_unref(s.target); | |
2757 | if (s.src) { | |
2758 | for (bs_i = 0; bs_i < s.src_num; bs_i++) { | |
2759 | blk_unref(s.src[bs_i]); | |
2760 | } | |
2761 | g_free(s.src); | |
2762 | } | |
2763 | g_free(s.src_sectors); | |
2764 | g_free(s.src_alignment); | |
2765 | fail_getopt: | |
2766 | g_free(options); | |
2767 | ||
2768 | return !!ret; | |
2769 | } | |
2770 | ||
2771 | ||
2772 | static void dump_snapshots(BlockDriverState *bs) | |
2773 | { | |
2774 | QEMUSnapshotInfo *sn_tab, *sn; | |
2775 | int nb_sns, i; | |
2776 | ||
2777 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2778 | if (nb_sns <= 0) | |
2779 | return; | |
2780 | printf("Snapshot list:\n"); | |
2781 | bdrv_snapshot_dump(NULL); | |
2782 | printf("\n"); | |
2783 | for(i = 0; i < nb_sns; i++) { | |
2784 | sn = &sn_tab[i]; | |
2785 | bdrv_snapshot_dump(sn); | |
2786 | printf("\n"); | |
2787 | } | |
2788 | g_free(sn_tab); | |
2789 | } | |
2790 | ||
2791 | static void dump_json_image_info_list(ImageInfoList *list) | |
2792 | { | |
2793 | QString *str; | |
2794 | QObject *obj; | |
2795 | Visitor *v = qobject_output_visitor_new(&obj); | |
2796 | ||
2797 | visit_type_ImageInfoList(v, NULL, &list, &error_abort); | |
2798 | visit_complete(v, &obj); | |
2799 | str = qobject_to_json_pretty(obj); | |
2800 | assert(str != NULL); | |
2801 | printf("%s\n", qstring_get_str(str)); | |
2802 | qobject_unref(obj); | |
2803 | visit_free(v); | |
2804 | qobject_unref(str); | |
2805 | } | |
2806 | ||
2807 | static void dump_json_image_info(ImageInfo *info) | |
2808 | { | |
2809 | QString *str; | |
2810 | QObject *obj; | |
2811 | Visitor *v = qobject_output_visitor_new(&obj); | |
2812 | ||
2813 | visit_type_ImageInfo(v, NULL, &info, &error_abort); | |
2814 | visit_complete(v, &obj); | |
2815 | str = qobject_to_json_pretty(obj); | |
2816 | assert(str != NULL); | |
2817 | printf("%s\n", qstring_get_str(str)); | |
2818 | qobject_unref(obj); | |
2819 | visit_free(v); | |
2820 | qobject_unref(str); | |
2821 | } | |
2822 | ||
2823 | static void dump_human_image_info_list(ImageInfoList *list) | |
2824 | { | |
2825 | ImageInfoList *elem; | |
2826 | bool delim = false; | |
2827 | ||
2828 | for (elem = list; elem; elem = elem->next) { | |
2829 | if (delim) { | |
2830 | printf("\n"); | |
2831 | } | |
2832 | delim = true; | |
2833 | ||
2834 | bdrv_image_info_dump(elem->value); | |
2835 | } | |
2836 | } | |
2837 | ||
2838 | static gboolean str_equal_func(gconstpointer a, gconstpointer b) | |
2839 | { | |
2840 | return strcmp(a, b) == 0; | |
2841 | } | |
2842 | ||
2843 | /** | |
2844 | * Open an image file chain and return an ImageInfoList | |
2845 | * | |
2846 | * @filename: topmost image filename | |
2847 | * @fmt: topmost image format (may be NULL to autodetect) | |
2848 | * @chain: true - enumerate entire backing file chain | |
2849 | * false - only topmost image file | |
2850 | * | |
2851 | * Returns a list of ImageInfo objects or NULL if there was an error opening an | |
2852 | * image file. If there was an error a message will have been printed to | |
2853 | * stderr. | |
2854 | */ | |
2855 | static ImageInfoList *collect_image_info_list(bool image_opts, | |
2856 | const char *filename, | |
2857 | const char *fmt, | |
2858 | bool chain, bool force_share) | |
2859 | { | |
2860 | ImageInfoList *head = NULL; | |
2861 | ImageInfoList **last = &head; | |
2862 | GHashTable *filenames; | |
2863 | Error *err = NULL; | |
2864 | ||
2865 | filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); | |
2866 | ||
2867 | while (filename) { | |
2868 | BlockBackend *blk; | |
2869 | BlockDriverState *bs; | |
2870 | ImageInfo *info; | |
2871 | ImageInfoList *elem; | |
2872 | ||
2873 | if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { | |
2874 | error_report("Backing file '%s' creates an infinite loop.", | |
2875 | filename); | |
2876 | goto err; | |
2877 | } | |
2878 | g_hash_table_insert(filenames, (gpointer)filename, NULL); | |
2879 | ||
2880 | blk = img_open(image_opts, filename, fmt, | |
2881 | BDRV_O_NO_BACKING | BDRV_O_NO_IO, false, false, | |
2882 | force_share); | |
2883 | if (!blk) { | |
2884 | goto err; | |
2885 | } | |
2886 | bs = blk_bs(blk); | |
2887 | ||
2888 | bdrv_query_image_info(bs, &info, &err); | |
2889 | if (err) { | |
2890 | error_report_err(err); | |
2891 | blk_unref(blk); | |
2892 | goto err; | |
2893 | } | |
2894 | ||
2895 | elem = g_new0(ImageInfoList, 1); | |
2896 | elem->value = info; | |
2897 | *last = elem; | |
2898 | last = &elem->next; | |
2899 | ||
2900 | blk_unref(blk); | |
2901 | ||
2902 | /* Clear parameters that only apply to the topmost image */ | |
2903 | filename = fmt = NULL; | |
2904 | image_opts = false; | |
2905 | ||
2906 | if (chain) { | |
2907 | if (info->has_full_backing_filename) { | |
2908 | filename = info->full_backing_filename; | |
2909 | } else if (info->has_backing_filename) { | |
2910 | error_report("Could not determine absolute backing filename," | |
2911 | " but backing filename '%s' present", | |
2912 | info->backing_filename); | |
2913 | goto err; | |
2914 | } | |
2915 | if (info->has_backing_filename_format) { | |
2916 | fmt = info->backing_filename_format; | |
2917 | } | |
2918 | } | |
2919 | } | |
2920 | g_hash_table_destroy(filenames); | |
2921 | return head; | |
2922 | ||
2923 | err: | |
2924 | qapi_free_ImageInfoList(head); | |
2925 | g_hash_table_destroy(filenames); | |
2926 | return NULL; | |
2927 | } | |
2928 | ||
2929 | static int img_info(int argc, char **argv) | |
2930 | { | |
2931 | int c; | |
2932 | OutputFormat output_format = OFORMAT_HUMAN; | |
2933 | bool chain = false; | |
2934 | const char *filename, *fmt, *output; | |
2935 | ImageInfoList *list; | |
2936 | bool image_opts = false; | |
2937 | bool force_share = false; | |
2938 | ||
2939 | fmt = NULL; | |
2940 | output = NULL; | |
2941 | for(;;) { | |
2942 | int option_index = 0; | |
2943 | static const struct option long_options[] = { | |
2944 | {"help", no_argument, 0, 'h'}, | |
2945 | {"format", required_argument, 0, 'f'}, | |
2946 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
2947 | {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, | |
2948 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2949 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2950 | {"force-share", no_argument, 0, 'U'}, | |
2951 | {0, 0, 0, 0} | |
2952 | }; | |
2953 | c = getopt_long(argc, argv, ":f:hU", | |
2954 | long_options, &option_index); | |
2955 | if (c == -1) { | |
2956 | break; | |
2957 | } | |
2958 | switch(c) { | |
2959 | case ':': | |
2960 | missing_argument(argv[optind - 1]); | |
2961 | break; | |
2962 | case '?': | |
2963 | unrecognized_option(argv[optind - 1]); | |
2964 | break; | |
2965 | case 'h': | |
2966 | help(); | |
2967 | break; | |
2968 | case 'f': | |
2969 | fmt = optarg; | |
2970 | break; | |
2971 | case 'U': | |
2972 | force_share = true; | |
2973 | break; | |
2974 | case OPTION_OUTPUT: | |
2975 | output = optarg; | |
2976 | break; | |
2977 | case OPTION_BACKING_CHAIN: | |
2978 | chain = true; | |
2979 | break; | |
2980 | case OPTION_OBJECT: { | |
2981 | QemuOpts *opts; | |
2982 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
2983 | optarg, true); | |
2984 | if (!opts) { | |
2985 | return 1; | |
2986 | } | |
2987 | } break; | |
2988 | case OPTION_IMAGE_OPTS: | |
2989 | image_opts = true; | |
2990 | break; | |
2991 | } | |
2992 | } | |
2993 | if (optind != argc - 1) { | |
2994 | error_exit("Expecting one image file name"); | |
2995 | } | |
2996 | filename = argv[optind++]; | |
2997 | ||
2998 | if (output && !strcmp(output, "json")) { | |
2999 | output_format = OFORMAT_JSON; | |
3000 | } else if (output && !strcmp(output, "human")) { | |
3001 | output_format = OFORMAT_HUMAN; | |
3002 | } else if (output) { | |
3003 | error_report("--output must be used with human or json as argument."); | |
3004 | return 1; | |
3005 | } | |
3006 | ||
3007 | if (qemu_opts_foreach(&qemu_object_opts, | |
3008 | user_creatable_add_opts_foreach, | |
3009 | qemu_img_object_print_help, &error_fatal)) { | |
3010 | return 1; | |
3011 | } | |
3012 | ||
3013 | list = collect_image_info_list(image_opts, filename, fmt, chain, | |
3014 | force_share); | |
3015 | if (!list) { | |
3016 | return 1; | |
3017 | } | |
3018 | ||
3019 | switch (output_format) { | |
3020 | case OFORMAT_HUMAN: | |
3021 | dump_human_image_info_list(list); | |
3022 | break; | |
3023 | case OFORMAT_JSON: | |
3024 | if (chain) { | |
3025 | dump_json_image_info_list(list); | |
3026 | } else { | |
3027 | dump_json_image_info(list->value); | |
3028 | } | |
3029 | break; | |
3030 | } | |
3031 | ||
3032 | qapi_free_ImageInfoList(list); | |
3033 | return 0; | |
3034 | } | |
3035 | ||
3036 | static int dump_map_entry(OutputFormat output_format, MapEntry *e, | |
3037 | MapEntry *next) | |
3038 | { | |
3039 | switch (output_format) { | |
3040 | case OFORMAT_HUMAN: | |
3041 | if (e->data && !e->has_offset) { | |
3042 | error_report("File contains external, encrypted or compressed clusters."); | |
3043 | return -1; | |
3044 | } | |
3045 | if (e->data && !e->zero) { | |
3046 | printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", | |
3047 | e->start, e->length, | |
3048 | e->has_offset ? e->offset : 0, | |
3049 | e->has_filename ? e->filename : ""); | |
3050 | } | |
3051 | /* This format ignores the distinction between 0, ZERO and ZERO|DATA. | |
3052 | * Modify the flags here to allow more coalescing. | |
3053 | */ | |
3054 | if (next && (!next->data || next->zero)) { | |
3055 | next->data = false; | |
3056 | next->zero = true; | |
3057 | } | |
3058 | break; | |
3059 | case OFORMAT_JSON: | |
3060 | printf("{ \"start\": %"PRId64", \"length\": %"PRId64"," | |
3061 | " \"depth\": %"PRId64", \"zero\": %s, \"data\": %s", | |
3062 | e->start, e->length, e->depth, | |
3063 | e->zero ? "true" : "false", | |
3064 | e->data ? "true" : "false"); | |
3065 | if (e->has_offset) { | |
3066 | printf(", \"offset\": %"PRId64"", e->offset); | |
3067 | } | |
3068 | putchar('}'); | |
3069 | ||
3070 | if (next) { | |
3071 | puts(","); | |
3072 | } | |
3073 | break; | |
3074 | } | |
3075 | return 0; | |
3076 | } | |
3077 | ||
3078 | static int get_block_status(BlockDriverState *bs, int64_t offset, | |
3079 | int64_t bytes, MapEntry *e) | |
3080 | { | |
3081 | int ret; | |
3082 | int depth; | |
3083 | BlockDriverState *file; | |
3084 | bool has_offset; | |
3085 | int64_t map; | |
3086 | char *filename = NULL; | |
3087 | ||
3088 | /* As an optimization, we could cache the current range of unallocated | |
3089 | * clusters in each file of the chain, and avoid querying the same | |
3090 | * range repeatedly. | |
3091 | */ | |
3092 | ||
3093 | depth = 0; | |
3094 | for (;;) { | |
3095 | bs = bdrv_skip_filters(bs); | |
3096 | ret = bdrv_block_status(bs, offset, bytes, &bytes, &map, &file); | |
3097 | if (ret < 0) { | |
3098 | return ret; | |
3099 | } | |
3100 | assert(bytes); | |
3101 | if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { | |
3102 | break; | |
3103 | } | |
3104 | bs = bdrv_cow_bs(bs); | |
3105 | if (bs == NULL) { | |
3106 | ret = 0; | |
3107 | break; | |
3108 | } | |
3109 | ||
3110 | depth++; | |
3111 | } | |
3112 | ||
3113 | has_offset = !!(ret & BDRV_BLOCK_OFFSET_VALID); | |
3114 | ||
3115 | if (file && has_offset) { | |
3116 | bdrv_refresh_filename(file); | |
3117 | filename = file->filename; | |
3118 | } | |
3119 | ||
3120 | *e = (MapEntry) { | |
3121 | .start = offset, | |
3122 | .length = bytes, | |
3123 | .data = !!(ret & BDRV_BLOCK_DATA), | |
3124 | .zero = !!(ret & BDRV_BLOCK_ZERO), | |
3125 | .offset = map, | |
3126 | .has_offset = has_offset, | |
3127 | .depth = depth, | |
3128 | .has_filename = filename, | |
3129 | .filename = filename, | |
3130 | }; | |
3131 | ||
3132 | return 0; | |
3133 | } | |
3134 | ||
3135 | static inline bool entry_mergeable(const MapEntry *curr, const MapEntry *next) | |
3136 | { | |
3137 | if (curr->length == 0) { | |
3138 | return false; | |
3139 | } | |
3140 | if (curr->zero != next->zero || | |
3141 | curr->data != next->data || | |
3142 | curr->depth != next->depth || | |
3143 | curr->has_filename != next->has_filename || | |
3144 | curr->has_offset != next->has_offset) { | |
3145 | return false; | |
3146 | } | |
3147 | if (curr->has_filename && strcmp(curr->filename, next->filename)) { | |
3148 | return false; | |
3149 | } | |
3150 | if (curr->has_offset && curr->offset + curr->length != next->offset) { | |
3151 | return false; | |
3152 | } | |
3153 | return true; | |
3154 | } | |
3155 | ||
3156 | static int img_map(int argc, char **argv) | |
3157 | { | |
3158 | int c; | |
3159 | OutputFormat output_format = OFORMAT_HUMAN; | |
3160 | BlockBackend *blk; | |
3161 | BlockDriverState *bs; | |
3162 | const char *filename, *fmt, *output; | |
3163 | int64_t length; | |
3164 | MapEntry curr = { .length = 0 }, next; | |
3165 | int ret = 0; | |
3166 | bool image_opts = false; | |
3167 | bool force_share = false; | |
3168 | int64_t start_offset = 0; | |
3169 | int64_t max_length = -1; | |
3170 | ||
3171 | fmt = NULL; | |
3172 | output = NULL; | |
3173 | for (;;) { | |
3174 | int option_index = 0; | |
3175 | static const struct option long_options[] = { | |
3176 | {"help", no_argument, 0, 'h'}, | |
3177 | {"format", required_argument, 0, 'f'}, | |
3178 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
3179 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3180 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3181 | {"force-share", no_argument, 0, 'U'}, | |
3182 | {"start-offset", required_argument, 0, 's'}, | |
3183 | {"max-length", required_argument, 0, 'l'}, | |
3184 | {0, 0, 0, 0} | |
3185 | }; | |
3186 | c = getopt_long(argc, argv, ":f:s:l:hU", | |
3187 | long_options, &option_index); | |
3188 | if (c == -1) { | |
3189 | break; | |
3190 | } | |
3191 | switch (c) { | |
3192 | case ':': | |
3193 | missing_argument(argv[optind - 1]); | |
3194 | break; | |
3195 | case '?': | |
3196 | unrecognized_option(argv[optind - 1]); | |
3197 | break; | |
3198 | case 'h': | |
3199 | help(); | |
3200 | break; | |
3201 | case 'f': | |
3202 | fmt = optarg; | |
3203 | break; | |
3204 | case 'U': | |
3205 | force_share = true; | |
3206 | break; | |
3207 | case OPTION_OUTPUT: | |
3208 | output = optarg; | |
3209 | break; | |
3210 | case 's': | |
3211 | start_offset = cvtnum("start offset", optarg); | |
3212 | if (start_offset < 0) { | |
3213 | return 1; | |
3214 | } | |
3215 | break; | |
3216 | case 'l': | |
3217 | max_length = cvtnum("max length", optarg); | |
3218 | if (max_length < 0) { | |
3219 | return 1; | |
3220 | } | |
3221 | break; | |
3222 | case OPTION_OBJECT: { | |
3223 | QemuOpts *opts; | |
3224 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
3225 | optarg, true); | |
3226 | if (!opts) { | |
3227 | return 1; | |
3228 | } | |
3229 | } break; | |
3230 | case OPTION_IMAGE_OPTS: | |
3231 | image_opts = true; | |
3232 | break; | |
3233 | } | |
3234 | } | |
3235 | if (optind != argc - 1) { | |
3236 | error_exit("Expecting one image file name"); | |
3237 | } | |
3238 | filename = argv[optind]; | |
3239 | ||
3240 | if (output && !strcmp(output, "json")) { | |
3241 | output_format = OFORMAT_JSON; | |
3242 | } else if (output && !strcmp(output, "human")) { | |
3243 | output_format = OFORMAT_HUMAN; | |
3244 | } else if (output) { | |
3245 | error_report("--output must be used with human or json as argument."); | |
3246 | return 1; | |
3247 | } | |
3248 | ||
3249 | if (qemu_opts_foreach(&qemu_object_opts, | |
3250 | user_creatable_add_opts_foreach, | |
3251 | qemu_img_object_print_help, &error_fatal)) { | |
3252 | return 1; | |
3253 | } | |
3254 | ||
3255 | blk = img_open(image_opts, filename, fmt, 0, false, false, force_share); | |
3256 | if (!blk) { | |
3257 | return 1; | |
3258 | } | |
3259 | bs = blk_bs(blk); | |
3260 | ||
3261 | if (output_format == OFORMAT_HUMAN) { | |
3262 | printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); | |
3263 | } else if (output_format == OFORMAT_JSON) { | |
3264 | putchar('['); | |
3265 | } | |
3266 | ||
3267 | length = blk_getlength(blk); | |
3268 | if (length < 0) { | |
3269 | error_report("Failed to get size for '%s'", filename); | |
3270 | return 1; | |
3271 | } | |
3272 | if (max_length != -1) { | |
3273 | length = MIN(start_offset + max_length, length); | |
3274 | } | |
3275 | ||
3276 | curr.start = start_offset; | |
3277 | while (curr.start + curr.length < length) { | |
3278 | int64_t offset = curr.start + curr.length; | |
3279 | int64_t n = length - offset; | |
3280 | ||
3281 | ret = get_block_status(bs, offset, n, &next); | |
3282 | if (ret < 0) { | |
3283 | error_report("Could not read file metadata: %s", strerror(-ret)); | |
3284 | goto out; | |
3285 | } | |
3286 | ||
3287 | if (entry_mergeable(&curr, &next)) { | |
3288 | curr.length += next.length; | |
3289 | continue; | |
3290 | } | |
3291 | ||
3292 | if (curr.length > 0) { | |
3293 | ret = dump_map_entry(output_format, &curr, &next); | |
3294 | if (ret < 0) { | |
3295 | goto out; | |
3296 | } | |
3297 | } | |
3298 | curr = next; | |
3299 | } | |
3300 | ||
3301 | ret = dump_map_entry(output_format, &curr, NULL); | |
3302 | if (output_format == OFORMAT_JSON) { | |
3303 | puts("]"); | |
3304 | } | |
3305 | ||
3306 | out: | |
3307 | blk_unref(blk); | |
3308 | return ret < 0; | |
3309 | } | |
3310 | ||
3311 | #define SNAPSHOT_LIST 1 | |
3312 | #define SNAPSHOT_CREATE 2 | |
3313 | #define SNAPSHOT_APPLY 3 | |
3314 | #define SNAPSHOT_DELETE 4 | |
3315 | ||
3316 | static int img_snapshot(int argc, char **argv) | |
3317 | { | |
3318 | BlockBackend *blk; | |
3319 | BlockDriverState *bs; | |
3320 | QEMUSnapshotInfo sn; | |
3321 | char *filename, *snapshot_name = NULL; | |
3322 | int c, ret = 0, bdrv_oflags; | |
3323 | int action = 0; | |
3324 | qemu_timeval tv; | |
3325 | bool quiet = false; | |
3326 | Error *err = NULL; | |
3327 | bool image_opts = false; | |
3328 | bool force_share = false; | |
3329 | ||
3330 | bdrv_oflags = BDRV_O_RDWR; | |
3331 | /* Parse commandline parameters */ | |
3332 | for(;;) { | |
3333 | static const struct option long_options[] = { | |
3334 | {"help", no_argument, 0, 'h'}, | |
3335 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3336 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3337 | {"force-share", no_argument, 0, 'U'}, | |
3338 | {0, 0, 0, 0} | |
3339 | }; | |
3340 | c = getopt_long(argc, argv, ":la:c:d:hqU", | |
3341 | long_options, NULL); | |
3342 | if (c == -1) { | |
3343 | break; | |
3344 | } | |
3345 | switch(c) { | |
3346 | case ':': | |
3347 | missing_argument(argv[optind - 1]); | |
3348 | break; | |
3349 | case '?': | |
3350 | unrecognized_option(argv[optind - 1]); | |
3351 | break; | |
3352 | case 'h': | |
3353 | help(); | |
3354 | return 0; | |
3355 | case 'l': | |
3356 | if (action) { | |
3357 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
3358 | return 0; | |
3359 | } | |
3360 | action = SNAPSHOT_LIST; | |
3361 | bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ | |
3362 | break; | |
3363 | case 'a': | |
3364 | if (action) { | |
3365 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
3366 | return 0; | |
3367 | } | |
3368 | action = SNAPSHOT_APPLY; | |
3369 | snapshot_name = optarg; | |
3370 | break; | |
3371 | case 'c': | |
3372 | if (action) { | |
3373 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
3374 | return 0; | |
3375 | } | |
3376 | action = SNAPSHOT_CREATE; | |
3377 | snapshot_name = optarg; | |
3378 | break; | |
3379 | case 'd': | |
3380 | if (action) { | |
3381 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
3382 | return 0; | |
3383 | } | |
3384 | action = SNAPSHOT_DELETE; | |
3385 | snapshot_name = optarg; | |
3386 | break; | |
3387 | case 'q': | |
3388 | quiet = true; | |
3389 | break; | |
3390 | case 'U': | |
3391 | force_share = true; | |
3392 | break; | |
3393 | case OPTION_OBJECT: { | |
3394 | QemuOpts *opts; | |
3395 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
3396 | optarg, true); | |
3397 | if (!opts) { | |
3398 | return 1; | |
3399 | } | |
3400 | } break; | |
3401 | case OPTION_IMAGE_OPTS: | |
3402 | image_opts = true; | |
3403 | break; | |
3404 | } | |
3405 | } | |
3406 | ||
3407 | if (optind != argc - 1) { | |
3408 | error_exit("Expecting one image file name"); | |
3409 | } | |
3410 | filename = argv[optind++]; | |
3411 | ||
3412 | if (qemu_opts_foreach(&qemu_object_opts, | |
3413 | user_creatable_add_opts_foreach, | |
3414 | qemu_img_object_print_help, &error_fatal)) { | |
3415 | return 1; | |
3416 | } | |
3417 | ||
3418 | /* Open the image */ | |
3419 | blk = img_open(image_opts, filename, NULL, bdrv_oflags, false, quiet, | |
3420 | force_share); | |
3421 | if (!blk) { | |
3422 | return 1; | |
3423 | } | |
3424 | bs = blk_bs(blk); | |
3425 | ||
3426 | /* Perform the requested action */ | |
3427 | switch(action) { | |
3428 | case SNAPSHOT_LIST: | |
3429 | dump_snapshots(bs); | |
3430 | break; | |
3431 | ||
3432 | case SNAPSHOT_CREATE: | |
3433 | memset(&sn, 0, sizeof(sn)); | |
3434 | pstrcpy(sn.name, sizeof(sn.name), snapshot_name); | |
3435 | ||
3436 | qemu_gettimeofday(&tv); | |
3437 | sn.date_sec = tv.tv_sec; | |
3438 | sn.date_nsec = tv.tv_usec * 1000; | |
3439 | ||
3440 | ret = bdrv_snapshot_create(bs, &sn); | |
3441 | if (ret) { | |
3442 | error_report("Could not create snapshot '%s': %d (%s)", | |
3443 | snapshot_name, ret, strerror(-ret)); | |
3444 | } | |
3445 | break; | |
3446 | ||
3447 | case SNAPSHOT_APPLY: | |
3448 | ret = bdrv_snapshot_goto(bs, snapshot_name, &err); | |
3449 | if (ret) { | |
3450 | error_reportf_err(err, "Could not apply snapshot '%s': ", | |
3451 | snapshot_name); | |
3452 | } | |
3453 | break; | |
3454 | ||
3455 | case SNAPSHOT_DELETE: | |
3456 | ret = bdrv_snapshot_find(bs, &sn, snapshot_name); | |
3457 | if (ret < 0) { | |
3458 | error_report("Could not delete snapshot '%s': snapshot not " | |
3459 | "found", snapshot_name); | |
3460 | ret = 1; | |
3461 | } else { | |
3462 | ret = bdrv_snapshot_delete(bs, sn.id_str, sn.name, &err); | |
3463 | if (ret < 0) { | |
3464 | error_reportf_err(err, "Could not delete snapshot '%s': ", | |
3465 | snapshot_name); | |
3466 | ret = 1; | |
3467 | } | |
3468 | } | |
3469 | break; | |
3470 | } | |
3471 | ||
3472 | /* Cleanup */ | |
3473 | blk_unref(blk); | |
3474 | if (ret) { | |
3475 | return 1; | |
3476 | } | |
3477 | return 0; | |
3478 | } | |
3479 | ||
3480 | static int img_rebase(int argc, char **argv) | |
3481 | { | |
3482 | BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL; | |
3483 | uint8_t *buf_old = NULL; | |
3484 | uint8_t *buf_new = NULL; | |
3485 | BlockDriverState *bs = NULL, *prefix_chain_bs = NULL; | |
3486 | BlockDriverState *unfiltered_bs; | |
3487 | char *filename; | |
3488 | const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; | |
3489 | int c, flags, src_flags, ret; | |
3490 | bool writethrough, src_writethrough; | |
3491 | int unsafe = 0; | |
3492 | bool force_share = false; | |
3493 | int progress = 0; | |
3494 | bool quiet = false; | |
3495 | Error *local_err = NULL; | |
3496 | bool image_opts = false; | |
3497 | ||
3498 | /* Parse commandline parameters */ | |
3499 | fmt = NULL; | |
3500 | cache = BDRV_DEFAULT_CACHE; | |
3501 | src_cache = BDRV_DEFAULT_CACHE; | |
3502 | out_baseimg = NULL; | |
3503 | out_basefmt = NULL; | |
3504 | for(;;) { | |
3505 | static const struct option long_options[] = { | |
3506 | {"help", no_argument, 0, 'h'}, | |
3507 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3508 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3509 | {"force-share", no_argument, 0, 'U'}, | |
3510 | {0, 0, 0, 0} | |
3511 | }; | |
3512 | c = getopt_long(argc, argv, ":hf:F:b:upt:T:qU", | |
3513 | long_options, NULL); | |
3514 | if (c == -1) { | |
3515 | break; | |
3516 | } | |
3517 | switch(c) { | |
3518 | case ':': | |
3519 | missing_argument(argv[optind - 1]); | |
3520 | break; | |
3521 | case '?': | |
3522 | unrecognized_option(argv[optind - 1]); | |
3523 | break; | |
3524 | case 'h': | |
3525 | help(); | |
3526 | return 0; | |
3527 | case 'f': | |
3528 | fmt = optarg; | |
3529 | break; | |
3530 | case 'F': | |
3531 | out_basefmt = optarg; | |
3532 | break; | |
3533 | case 'b': | |
3534 | out_baseimg = optarg; | |
3535 | break; | |
3536 | case 'u': | |
3537 | unsafe = 1; | |
3538 | break; | |
3539 | case 'p': | |
3540 | progress = 1; | |
3541 | break; | |
3542 | case 't': | |
3543 | cache = optarg; | |
3544 | break; | |
3545 | case 'T': | |
3546 | src_cache = optarg; | |
3547 | break; | |
3548 | case 'q': | |
3549 | quiet = true; | |
3550 | break; | |
3551 | case OPTION_OBJECT: { | |
3552 | QemuOpts *opts; | |
3553 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
3554 | optarg, true); | |
3555 | if (!opts) { | |
3556 | return 1; | |
3557 | } | |
3558 | } break; | |
3559 | case OPTION_IMAGE_OPTS: | |
3560 | image_opts = true; | |
3561 | break; | |
3562 | case 'U': | |
3563 | force_share = true; | |
3564 | break; | |
3565 | } | |
3566 | } | |
3567 | ||
3568 | if (quiet) { | |
3569 | progress = 0; | |
3570 | } | |
3571 | ||
3572 | if (optind != argc - 1) { | |
3573 | error_exit("Expecting one image file name"); | |
3574 | } | |
3575 | if (!unsafe && !out_baseimg) { | |
3576 | error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); | |
3577 | } | |
3578 | filename = argv[optind++]; | |
3579 | ||
3580 | if (qemu_opts_foreach(&qemu_object_opts, | |
3581 | user_creatable_add_opts_foreach, | |
3582 | qemu_img_object_print_help, &error_fatal)) { | |
3583 | return 1; | |
3584 | } | |
3585 | ||
3586 | qemu_progress_init(progress, 2.0); | |
3587 | qemu_progress_print(0, 100); | |
3588 | ||
3589 | flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); | |
3590 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
3591 | if (ret < 0) { | |
3592 | error_report("Invalid cache option: %s", cache); | |
3593 | goto out; | |
3594 | } | |
3595 | ||
3596 | src_flags = 0; | |
3597 | ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough); | |
3598 | if (ret < 0) { | |
3599 | error_report("Invalid source cache option: %s", src_cache); | |
3600 | goto out; | |
3601 | } | |
3602 | ||
3603 | /* The source files are opened read-only, don't care about WCE */ | |
3604 | assert((src_flags & BDRV_O_RDWR) == 0); | |
3605 | (void) src_writethrough; | |
3606 | ||
3607 | /* | |
3608 | * Open the images. | |
3609 | * | |
3610 | * Ignore the old backing file for unsafe rebase in case we want to correct | |
3611 | * the reference to a renamed or moved backing file. | |
3612 | */ | |
3613 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, | |
3614 | false); | |
3615 | if (!blk) { | |
3616 | ret = -1; | |
3617 | goto out; | |
3618 | } | |
3619 | bs = blk_bs(blk); | |
3620 | ||
3621 | unfiltered_bs = bdrv_skip_filters(bs); | |
3622 | ||
3623 | if (out_basefmt != NULL) { | |
3624 | if (bdrv_find_format(out_basefmt) == NULL) { | |
3625 | error_report("Invalid format name: '%s'", out_basefmt); | |
3626 | ret = -1; | |
3627 | goto out; | |
3628 | } | |
3629 | } | |
3630 | ||
3631 | /* For safe rebasing we need to compare old and new backing file */ | |
3632 | if (!unsafe) { | |
3633 | QDict *options = NULL; | |
3634 | BlockDriverState *base_bs = bdrv_cow_bs(unfiltered_bs); | |
3635 | ||
3636 | if (base_bs) { | |
3637 | blk_old_backing = blk_new(qemu_get_aio_context(), | |
3638 | BLK_PERM_CONSISTENT_READ, | |
3639 | BLK_PERM_ALL); | |
3640 | ret = blk_insert_bs(blk_old_backing, base_bs, | |
3641 | &local_err); | |
3642 | if (ret < 0) { | |
3643 | error_reportf_err(local_err, | |
3644 | "Could not reuse old backing file '%s': ", | |
3645 | base_bs->filename); | |
3646 | goto out; | |
3647 | } | |
3648 | } else { | |
3649 | blk_old_backing = NULL; | |
3650 | } | |
3651 | ||
3652 | if (out_baseimg[0]) { | |
3653 | const char *overlay_filename; | |
3654 | char *out_real_path; | |
3655 | ||
3656 | options = qdict_new(); | |
3657 | if (out_basefmt) { | |
3658 | qdict_put_str(options, "driver", out_basefmt); | |
3659 | } | |
3660 | if (force_share) { | |
3661 | qdict_put_bool(options, BDRV_OPT_FORCE_SHARE, true); | |
3662 | } | |
3663 | ||
3664 | bdrv_refresh_filename(bs); | |
3665 | overlay_filename = bs->exact_filename[0] ? bs->exact_filename | |
3666 | : bs->filename; | |
3667 | out_real_path = | |
3668 | bdrv_get_full_backing_filename_from_filename(overlay_filename, | |
3669 | out_baseimg, | |
3670 | &local_err); | |
3671 | if (local_err) { | |
3672 | qobject_unref(options); | |
3673 | error_reportf_err(local_err, | |
3674 | "Could not resolve backing filename: "); | |
3675 | ret = -1; | |
3676 | goto out; | |
3677 | } | |
3678 | ||
3679 | /* | |
3680 | * Find out whether we rebase an image on top of a previous image | |
3681 | * in its chain. | |
3682 | */ | |
3683 | prefix_chain_bs = bdrv_find_backing_image(bs, out_real_path); | |
3684 | if (prefix_chain_bs) { | |
3685 | qobject_unref(options); | |
3686 | g_free(out_real_path); | |
3687 | ||
3688 | blk_new_backing = blk_new(qemu_get_aio_context(), | |
3689 | BLK_PERM_CONSISTENT_READ, | |
3690 | BLK_PERM_ALL); | |
3691 | ret = blk_insert_bs(blk_new_backing, prefix_chain_bs, | |
3692 | &local_err); | |
3693 | if (ret < 0) { | |
3694 | error_reportf_err(local_err, | |
3695 | "Could not reuse backing file '%s': ", | |
3696 | out_baseimg); | |
3697 | goto out; | |
3698 | } | |
3699 | } else { | |
3700 | blk_new_backing = blk_new_open(out_real_path, NULL, | |
3701 | options, src_flags, &local_err); | |
3702 | g_free(out_real_path); | |
3703 | if (!blk_new_backing) { | |
3704 | error_reportf_err(local_err, | |
3705 | "Could not open new backing file '%s': ", | |
3706 | out_baseimg); | |
3707 | ret = -1; | |
3708 | goto out; | |
3709 | } | |
3710 | } | |
3711 | } | |
3712 | } | |
3713 | ||
3714 | /* | |
3715 | * Check each unallocated cluster in the COW file. If it is unallocated, | |
3716 | * accesses go to the backing file. We must therefore compare this cluster | |
3717 | * in the old and new backing file, and if they differ we need to copy it | |
3718 | * from the old backing file into the COW file. | |
3719 | * | |
3720 | * If qemu-img crashes during this step, no harm is done. The content of | |
3721 | * the image is the same as the original one at any time. | |
3722 | */ | |
3723 | if (!unsafe) { | |
3724 | int64_t size; | |
3725 | int64_t old_backing_size = 0; | |
3726 | int64_t new_backing_size = 0; | |
3727 | uint64_t offset; | |
3728 | int64_t n; | |
3729 | float local_progress = 0; | |
3730 | ||
3731 | buf_old = blk_blockalign(blk, IO_BUF_SIZE); | |
3732 | buf_new = blk_blockalign(blk, IO_BUF_SIZE); | |
3733 | ||
3734 | size = blk_getlength(blk); | |
3735 | if (size < 0) { | |
3736 | error_report("Could not get size of '%s': %s", | |
3737 | filename, strerror(-size)); | |
3738 | ret = -1; | |
3739 | goto out; | |
3740 | } | |
3741 | if (blk_old_backing) { | |
3742 | old_backing_size = blk_getlength(blk_old_backing); | |
3743 | if (old_backing_size < 0) { | |
3744 | char backing_name[PATH_MAX]; | |
3745 | ||
3746 | bdrv_get_backing_filename(bs, backing_name, | |
3747 | sizeof(backing_name)); | |
3748 | error_report("Could not get size of '%s': %s", | |
3749 | backing_name, strerror(-old_backing_size)); | |
3750 | ret = -1; | |
3751 | goto out; | |
3752 | } | |
3753 | } | |
3754 | if (blk_new_backing) { | |
3755 | new_backing_size = blk_getlength(blk_new_backing); | |
3756 | if (new_backing_size < 0) { | |
3757 | error_report("Could not get size of '%s': %s", | |
3758 | out_baseimg, strerror(-new_backing_size)); | |
3759 | ret = -1; | |
3760 | goto out; | |
3761 | } | |
3762 | } | |
3763 | ||
3764 | if (size != 0) { | |
3765 | local_progress = (float)100 / (size / MIN(size, IO_BUF_SIZE)); | |
3766 | } | |
3767 | ||
3768 | for (offset = 0; offset < size; offset += n) { | |
3769 | bool buf_old_is_zero = false; | |
3770 | ||
3771 | /* How many bytes can we handle with the next read? */ | |
3772 | n = MIN(IO_BUF_SIZE, size - offset); | |
3773 | ||
3774 | /* If the cluster is allocated, we don't need to take action */ | |
3775 | ret = bdrv_is_allocated(unfiltered_bs, offset, n, &n); | |
3776 | if (ret < 0) { | |
3777 | error_report("error while reading image metadata: %s", | |
3778 | strerror(-ret)); | |
3779 | goto out; | |
3780 | } | |
3781 | if (ret) { | |
3782 | continue; | |
3783 | } | |
3784 | ||
3785 | if (prefix_chain_bs) { | |
3786 | /* | |
3787 | * If cluster wasn't changed since prefix_chain, we don't need | |
3788 | * to take action | |
3789 | */ | |
3790 | ret = bdrv_is_allocated_above(bdrv_cow_bs(unfiltered_bs), | |
3791 | prefix_chain_bs, false, | |
3792 | offset, n, &n); | |
3793 | if (ret < 0) { | |
3794 | error_report("error while reading image metadata: %s", | |
3795 | strerror(-ret)); | |
3796 | goto out; | |
3797 | } | |
3798 | if (!ret) { | |
3799 | continue; | |
3800 | } | |
3801 | } | |
3802 | ||
3803 | /* | |
3804 | * Read old and new backing file and take into consideration that | |
3805 | * backing files may be smaller than the COW image. | |
3806 | */ | |
3807 | if (offset >= old_backing_size) { | |
3808 | memset(buf_old, 0, n); | |
3809 | buf_old_is_zero = true; | |
3810 | } else { | |
3811 | if (offset + n > old_backing_size) { | |
3812 | n = old_backing_size - offset; | |
3813 | } | |
3814 | ||
3815 | ret = blk_pread(blk_old_backing, offset, buf_old, n); | |
3816 | if (ret < 0) { | |
3817 | error_report("error while reading from old backing file"); | |
3818 | goto out; | |
3819 | } | |
3820 | } | |
3821 | ||
3822 | if (offset >= new_backing_size || !blk_new_backing) { | |
3823 | memset(buf_new, 0, n); | |
3824 | } else { | |
3825 | if (offset + n > new_backing_size) { | |
3826 | n = new_backing_size - offset; | |
3827 | } | |
3828 | ||
3829 | ret = blk_pread(blk_new_backing, offset, buf_new, n); | |
3830 | if (ret < 0) { | |
3831 | error_report("error while reading from new backing file"); | |
3832 | goto out; | |
3833 | } | |
3834 | } | |
3835 | ||
3836 | /* If they differ, we need to write to the COW file */ | |
3837 | uint64_t written = 0; | |
3838 | ||
3839 | while (written < n) { | |
3840 | int64_t pnum; | |
3841 | ||
3842 | if (compare_buffers(buf_old + written, buf_new + written, | |
3843 | n - written, &pnum)) | |
3844 | { | |
3845 | if (buf_old_is_zero) { | |
3846 | ret = blk_pwrite_zeroes(blk, offset + written, pnum, 0); | |
3847 | } else { | |
3848 | ret = blk_pwrite(blk, offset + written, | |
3849 | buf_old + written, pnum, 0); | |
3850 | } | |
3851 | if (ret < 0) { | |
3852 | error_report("Error while writing to COW image: %s", | |
3853 | strerror(-ret)); | |
3854 | goto out; | |
3855 | } | |
3856 | } | |
3857 | ||
3858 | written += pnum; | |
3859 | } | |
3860 | qemu_progress_print(local_progress, 100); | |
3861 | } | |
3862 | } | |
3863 | ||
3864 | /* | |
3865 | * Change the backing file. All clusters that are different from the old | |
3866 | * backing file are overwritten in the COW file now, so the visible content | |
3867 | * doesn't change when we switch the backing file. | |
3868 | */ | |
3869 | if (out_baseimg && *out_baseimg) { | |
3870 | ret = bdrv_change_backing_file(unfiltered_bs, out_baseimg, out_basefmt, | |
3871 | true); | |
3872 | } else { | |
3873 | ret = bdrv_change_backing_file(unfiltered_bs, NULL, NULL, false); | |
3874 | } | |
3875 | ||
3876 | if (ret == -ENOSPC) { | |
3877 | error_report("Could not change the backing file to '%s': No " | |
3878 | "space left in the file header", out_baseimg); | |
3879 | } else if (ret < 0) { | |
3880 | error_report("Could not change the backing file to '%s': %s", | |
3881 | out_baseimg, strerror(-ret)); | |
3882 | } | |
3883 | ||
3884 | qemu_progress_print(100, 0); | |
3885 | /* | |
3886 | * TODO At this point it is possible to check if any clusters that are | |
3887 | * allocated in the COW file are the same in the backing file. If so, they | |
3888 | * could be dropped from the COW file. Don't do this before switching the | |
3889 | * backing file, in case of a crash this would lead to corruption. | |
3890 | */ | |
3891 | out: | |
3892 | qemu_progress_end(); | |
3893 | /* Cleanup */ | |
3894 | if (!unsafe) { | |
3895 | blk_unref(blk_old_backing); | |
3896 | blk_unref(blk_new_backing); | |
3897 | } | |
3898 | qemu_vfree(buf_old); | |
3899 | qemu_vfree(buf_new); | |
3900 | ||
3901 | blk_unref(blk); | |
3902 | if (ret) { | |
3903 | return 1; | |
3904 | } | |
3905 | return 0; | |
3906 | } | |
3907 | ||
3908 | static int img_resize(int argc, char **argv) | |
3909 | { | |
3910 | Error *err = NULL; | |
3911 | int c, ret, relative; | |
3912 | const char *filename, *fmt, *size; | |
3913 | int64_t n, total_size, current_size; | |
3914 | bool quiet = false; | |
3915 | BlockBackend *blk = NULL; | |
3916 | PreallocMode prealloc = PREALLOC_MODE_OFF; | |
3917 | QemuOpts *param; | |
3918 | ||
3919 | static QemuOptsList resize_options = { | |
3920 | .name = "resize_options", | |
3921 | .head = QTAILQ_HEAD_INITIALIZER(resize_options.head), | |
3922 | .desc = { | |
3923 | { | |
3924 | .name = BLOCK_OPT_SIZE, | |
3925 | .type = QEMU_OPT_SIZE, | |
3926 | .help = "Virtual disk size" | |
3927 | }, { | |
3928 | /* end of list */ | |
3929 | } | |
3930 | }, | |
3931 | }; | |
3932 | bool image_opts = false; | |
3933 | bool shrink = false; | |
3934 | ||
3935 | /* Remove size from argv manually so that negative numbers are not treated | |
3936 | * as options by getopt. */ | |
3937 | if (argc < 3) { | |
3938 | error_exit("Not enough arguments"); | |
3939 | return 1; | |
3940 | } | |
3941 | ||
3942 | size = argv[--argc]; | |
3943 | ||
3944 | /* Parse getopt arguments */ | |
3945 | fmt = NULL; | |
3946 | for(;;) { | |
3947 | static const struct option long_options[] = { | |
3948 | {"help", no_argument, 0, 'h'}, | |
3949 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3950 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3951 | {"preallocation", required_argument, 0, OPTION_PREALLOCATION}, | |
3952 | {"shrink", no_argument, 0, OPTION_SHRINK}, | |
3953 | {0, 0, 0, 0} | |
3954 | }; | |
3955 | c = getopt_long(argc, argv, ":f:hq", | |
3956 | long_options, NULL); | |
3957 | if (c == -1) { | |
3958 | break; | |
3959 | } | |
3960 | switch(c) { | |
3961 | case ':': | |
3962 | missing_argument(argv[optind - 1]); | |
3963 | break; | |
3964 | case '?': | |
3965 | unrecognized_option(argv[optind - 1]); | |
3966 | break; | |
3967 | case 'h': | |
3968 | help(); | |
3969 | break; | |
3970 | case 'f': | |
3971 | fmt = optarg; | |
3972 | break; | |
3973 | case 'q': | |
3974 | quiet = true; | |
3975 | break; | |
3976 | case OPTION_OBJECT: { | |
3977 | QemuOpts *opts; | |
3978 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
3979 | optarg, true); | |
3980 | if (!opts) { | |
3981 | return 1; | |
3982 | } | |
3983 | } break; | |
3984 | case OPTION_IMAGE_OPTS: | |
3985 | image_opts = true; | |
3986 | break; | |
3987 | case OPTION_PREALLOCATION: | |
3988 | prealloc = qapi_enum_parse(&PreallocMode_lookup, optarg, | |
3989 | PREALLOC_MODE__MAX, NULL); | |
3990 | if (prealloc == PREALLOC_MODE__MAX) { | |
3991 | error_report("Invalid preallocation mode '%s'", optarg); | |
3992 | return 1; | |
3993 | } | |
3994 | break; | |
3995 | case OPTION_SHRINK: | |
3996 | shrink = true; | |
3997 | break; | |
3998 | } | |
3999 | } | |
4000 | if (optind != argc - 1) { | |
4001 | error_exit("Expecting image file name and size"); | |
4002 | } | |
4003 | filename = argv[optind++]; | |
4004 | ||
4005 | if (qemu_opts_foreach(&qemu_object_opts, | |
4006 | user_creatable_add_opts_foreach, | |
4007 | qemu_img_object_print_help, &error_fatal)) { | |
4008 | return 1; | |
4009 | } | |
4010 | ||
4011 | /* Choose grow, shrink, or absolute resize mode */ | |
4012 | switch (size[0]) { | |
4013 | case '+': | |
4014 | relative = 1; | |
4015 | size++; | |
4016 | break; | |
4017 | case '-': | |
4018 | relative = -1; | |
4019 | size++; | |
4020 | break; | |
4021 | default: | |
4022 | relative = 0; | |
4023 | break; | |
4024 | } | |
4025 | ||
4026 | /* Parse size */ | |
4027 | param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); | |
4028 | if (!qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err)) { | |
4029 | error_report_err(err); | |
4030 | ret = -1; | |
4031 | qemu_opts_del(param); | |
4032 | goto out; | |
4033 | } | |
4034 | n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); | |
4035 | qemu_opts_del(param); | |
4036 | ||
4037 | blk = img_open(image_opts, filename, fmt, | |
4038 | BDRV_O_RDWR | BDRV_O_RESIZE, false, quiet, | |
4039 | false); | |
4040 | if (!blk) { | |
4041 | ret = -1; | |
4042 | goto out; | |
4043 | } | |
4044 | ||
4045 | current_size = blk_getlength(blk); | |
4046 | if (current_size < 0) { | |
4047 | error_report("Failed to inquire current image length: %s", | |
4048 | strerror(-current_size)); | |
4049 | ret = -1; | |
4050 | goto out; | |
4051 | } | |
4052 | ||
4053 | if (relative) { | |
4054 | total_size = current_size + n * relative; | |
4055 | } else { | |
4056 | total_size = n; | |
4057 | } | |
4058 | if (total_size <= 0) { | |
4059 | error_report("New image size must be positive"); | |
4060 | ret = -1; | |
4061 | goto out; | |
4062 | } | |
4063 | ||
4064 | if (total_size <= current_size && prealloc != PREALLOC_MODE_OFF) { | |
4065 | error_report("Preallocation can only be used for growing images"); | |
4066 | ret = -1; | |
4067 | goto out; | |
4068 | } | |
4069 | ||
4070 | if (total_size < current_size && !shrink) { | |
4071 | error_report("Use the --shrink option to perform a shrink operation."); | |
4072 | warn_report("Shrinking an image will delete all data beyond the " | |
4073 | "shrunken image's end. Before performing such an " | |
4074 | "operation, make sure there is no important data there."); | |
4075 | ret = -1; | |
4076 | goto out; | |
4077 | } | |
4078 | ||
4079 | /* | |
4080 | * The user expects the image to have the desired size after | |
4081 | * resizing, so pass @exact=true. It is of no use to report | |
4082 | * success when the image has not actually been resized. | |
4083 | */ | |
4084 | ret = blk_truncate(blk, total_size, true, prealloc, 0, &err); | |
4085 | if (!ret) { | |
4086 | qprintf(quiet, "Image resized.\n"); | |
4087 | } else { | |
4088 | error_report_err(err); | |
4089 | } | |
4090 | out: | |
4091 | blk_unref(blk); | |
4092 | if (ret) { | |
4093 | return 1; | |
4094 | } | |
4095 | return 0; | |
4096 | } | |
4097 | ||
4098 | static void amend_status_cb(BlockDriverState *bs, | |
4099 | int64_t offset, int64_t total_work_size, | |
4100 | void *opaque) | |
4101 | { | |
4102 | qemu_progress_print(100.f * offset / total_work_size, 0); | |
4103 | } | |
4104 | ||
4105 | static int print_amend_option_help(const char *format) | |
4106 | { | |
4107 | BlockDriver *drv; | |
4108 | ||
4109 | /* Find driver and parse its options */ | |
4110 | drv = bdrv_find_format(format); | |
4111 | if (!drv) { | |
4112 | error_report("Unknown file format '%s'", format); | |
4113 | return 1; | |
4114 | } | |
4115 | ||
4116 | if (!drv->bdrv_amend_options) { | |
4117 | error_report("Format driver '%s' does not support option amendment", | |
4118 | format); | |
4119 | return 1; | |
4120 | } | |
4121 | ||
4122 | /* Every driver supporting amendment must have amend_opts */ | |
4123 | assert(drv->amend_opts); | |
4124 | ||
4125 | printf("Amend options for '%s':\n", format); | |
4126 | qemu_opts_print_help(drv->amend_opts, false); | |
4127 | return 0; | |
4128 | } | |
4129 | ||
4130 | static int img_amend(int argc, char **argv) | |
4131 | { | |
4132 | Error *err = NULL; | |
4133 | int c, ret = 0; | |
4134 | char *options = NULL; | |
4135 | QemuOptsList *amend_opts = NULL; | |
4136 | QemuOpts *opts = NULL; | |
4137 | const char *fmt = NULL, *filename, *cache; | |
4138 | int flags; | |
4139 | bool writethrough; | |
4140 | bool quiet = false, progress = false; | |
4141 | BlockBackend *blk = NULL; | |
4142 | BlockDriverState *bs = NULL; | |
4143 | bool image_opts = false; | |
4144 | bool force = false; | |
4145 | ||
4146 | cache = BDRV_DEFAULT_CACHE; | |
4147 | for (;;) { | |
4148 | static const struct option long_options[] = { | |
4149 | {"help", no_argument, 0, 'h'}, | |
4150 | {"object", required_argument, 0, OPTION_OBJECT}, | |
4151 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
4152 | {"force", no_argument, 0, OPTION_FORCE}, | |
4153 | {0, 0, 0, 0} | |
4154 | }; | |
4155 | c = getopt_long(argc, argv, ":ho:f:t:pq", | |
4156 | long_options, NULL); | |
4157 | if (c == -1) { | |
4158 | break; | |
4159 | } | |
4160 | ||
4161 | switch (c) { | |
4162 | case ':': | |
4163 | missing_argument(argv[optind - 1]); | |
4164 | break; | |
4165 | case '?': | |
4166 | unrecognized_option(argv[optind - 1]); | |
4167 | break; | |
4168 | case 'h': | |
4169 | help(); | |
4170 | break; | |
4171 | case 'o': | |
4172 | if (accumulate_options(&options, optarg) < 0) { | |
4173 | ret = -1; | |
4174 | goto out_no_progress; | |
4175 | } | |
4176 | break; | |
4177 | case 'f': | |
4178 | fmt = optarg; | |
4179 | break; | |
4180 | case 't': | |
4181 | cache = optarg; | |
4182 | break; | |
4183 | case 'p': | |
4184 | progress = true; | |
4185 | break; | |
4186 | case 'q': | |
4187 | quiet = true; | |
4188 | break; | |
4189 | case OPTION_OBJECT: | |
4190 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
4191 | optarg, true); | |
4192 | if (!opts) { | |
4193 | ret = -1; | |
4194 | goto out_no_progress; | |
4195 | } | |
4196 | break; | |
4197 | case OPTION_IMAGE_OPTS: | |
4198 | image_opts = true; | |
4199 | break; | |
4200 | case OPTION_FORCE: | |
4201 | force = true; | |
4202 | break; | |
4203 | } | |
4204 | } | |
4205 | ||
4206 | if (!options) { | |
4207 | error_exit("Must specify options (-o)"); | |
4208 | } | |
4209 | ||
4210 | if (qemu_opts_foreach(&qemu_object_opts, | |
4211 | user_creatable_add_opts_foreach, | |
4212 | qemu_img_object_print_help, &error_fatal)) { | |
4213 | ret = -1; | |
4214 | goto out_no_progress; | |
4215 | } | |
4216 | ||
4217 | if (quiet) { | |
4218 | progress = false; | |
4219 | } | |
4220 | qemu_progress_init(progress, 1.0); | |
4221 | ||
4222 | filename = (optind == argc - 1) ? argv[argc - 1] : NULL; | |
4223 | if (fmt && has_help_option(options)) { | |
4224 | /* If a format is explicitly specified (and possibly no filename is | |
4225 | * given), print option help here */ | |
4226 | ret = print_amend_option_help(fmt); | |
4227 | goto out; | |
4228 | } | |
4229 | ||
4230 | if (optind != argc - 1) { | |
4231 | error_report("Expecting one image file name"); | |
4232 | ret = -1; | |
4233 | goto out; | |
4234 | } | |
4235 | ||
4236 | flags = BDRV_O_RDWR; | |
4237 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
4238 | if (ret < 0) { | |
4239 | error_report("Invalid cache option: %s", cache); | |
4240 | goto out; | |
4241 | } | |
4242 | ||
4243 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, | |
4244 | false); | |
4245 | if (!blk) { | |
4246 | ret = -1; | |
4247 | goto out; | |
4248 | } | |
4249 | bs = blk_bs(blk); | |
4250 | ||
4251 | fmt = bs->drv->format_name; | |
4252 | ||
4253 | if (has_help_option(options)) { | |
4254 | /* If the format was auto-detected, print option help here */ | |
4255 | ret = print_amend_option_help(fmt); | |
4256 | goto out; | |
4257 | } | |
4258 | ||
4259 | if (!bs->drv->bdrv_amend_options) { | |
4260 | error_report("Format driver '%s' does not support option amendment", | |
4261 | fmt); | |
4262 | ret = -1; | |
4263 | goto out; | |
4264 | } | |
4265 | ||
4266 | /* Every driver supporting amendment must have amend_opts */ | |
4267 | assert(bs->drv->amend_opts); | |
4268 | ||
4269 | amend_opts = qemu_opts_append(amend_opts, bs->drv->amend_opts); | |
4270 | opts = qemu_opts_create(amend_opts, NULL, 0, &error_abort); | |
4271 | if (!qemu_opts_do_parse(opts, options, NULL, &err)) { | |
4272 | /* Try to parse options using the create options */ | |
4273 | amend_opts = qemu_opts_append(amend_opts, bs->drv->create_opts); | |
4274 | qemu_opts_del(opts); | |
4275 | opts = qemu_opts_create(amend_opts, NULL, 0, &error_abort); | |
4276 | if (qemu_opts_do_parse(opts, options, NULL, NULL)) { | |
4277 | error_append_hint(&err, | |
4278 | "This option is only supported for image creation\n"); | |
4279 | } | |
4280 | ||
4281 | error_report_err(err); | |
4282 | ret = -1; | |
4283 | goto out; | |
4284 | } | |
4285 | ||
4286 | /* In case the driver does not call amend_status_cb() */ | |
4287 | qemu_progress_print(0.f, 0); | |
4288 | ret = bdrv_amend_options(bs, opts, &amend_status_cb, NULL, force, &err); | |
4289 | qemu_progress_print(100.f, 0); | |
4290 | if (ret < 0) { | |
4291 | error_report_err(err); | |
4292 | goto out; | |
4293 | } | |
4294 | ||
4295 | out: | |
4296 | qemu_progress_end(); | |
4297 | ||
4298 | out_no_progress: | |
4299 | blk_unref(blk); | |
4300 | qemu_opts_del(opts); | |
4301 | qemu_opts_free(amend_opts); | |
4302 | g_free(options); | |
4303 | ||
4304 | if (ret) { | |
4305 | return 1; | |
4306 | } | |
4307 | return 0; | |
4308 | } | |
4309 | ||
4310 | typedef struct BenchData { | |
4311 | BlockBackend *blk; | |
4312 | uint64_t image_size; | |
4313 | bool write; | |
4314 | int bufsize; | |
4315 | int step; | |
4316 | int nrreq; | |
4317 | int n; | |
4318 | int flush_interval; | |
4319 | bool drain_on_flush; | |
4320 | uint8_t *buf; | |
4321 | QEMUIOVector *qiov; | |
4322 | ||
4323 | int in_flight; | |
4324 | bool in_flush; | |
4325 | uint64_t offset; | |
4326 | } BenchData; | |
4327 | ||
4328 | static void bench_undrained_flush_cb(void *opaque, int ret) | |
4329 | { | |
4330 | if (ret < 0) { | |
4331 | error_report("Failed flush request: %s", strerror(-ret)); | |
4332 | exit(EXIT_FAILURE); | |
4333 | } | |
4334 | } | |
4335 | ||
4336 | static void bench_cb(void *opaque, int ret) | |
4337 | { | |
4338 | BenchData *b = opaque; | |
4339 | BlockAIOCB *acb; | |
4340 | ||
4341 | if (ret < 0) { | |
4342 | error_report("Failed request: %s", strerror(-ret)); | |
4343 | exit(EXIT_FAILURE); | |
4344 | } | |
4345 | ||
4346 | if (b->in_flush) { | |
4347 | /* Just finished a flush with drained queue: Start next requests */ | |
4348 | assert(b->in_flight == 0); | |
4349 | b->in_flush = false; | |
4350 | } else if (b->in_flight > 0) { | |
4351 | int remaining = b->n - b->in_flight; | |
4352 | ||
4353 | b->n--; | |
4354 | b->in_flight--; | |
4355 | ||
4356 | /* Time for flush? Drain queue if requested, then flush */ | |
4357 | if (b->flush_interval && remaining % b->flush_interval == 0) { | |
4358 | if (!b->in_flight || !b->drain_on_flush) { | |
4359 | BlockCompletionFunc *cb; | |
4360 | ||
4361 | if (b->drain_on_flush) { | |
4362 | b->in_flush = true; | |
4363 | cb = bench_cb; | |
4364 | } else { | |
4365 | cb = bench_undrained_flush_cb; | |
4366 | } | |
4367 | ||
4368 | acb = blk_aio_flush(b->blk, cb, b); | |
4369 | if (!acb) { | |
4370 | error_report("Failed to issue flush request"); | |
4371 | exit(EXIT_FAILURE); | |
4372 | } | |
4373 | } | |
4374 | if (b->drain_on_flush) { | |
4375 | return; | |
4376 | } | |
4377 | } | |
4378 | } | |
4379 | ||
4380 | while (b->n > b->in_flight && b->in_flight < b->nrreq) { | |
4381 | int64_t offset = b->offset; | |
4382 | /* blk_aio_* might look for completed I/Os and kick bench_cb | |
4383 | * again, so make sure this operation is counted by in_flight | |
4384 | * and b->offset is ready for the next submission. | |
4385 | */ | |
4386 | b->in_flight++; | |
4387 | b->offset += b->step; | |
4388 | b->offset %= b->image_size; | |
4389 | if (b->write) { | |
4390 | acb = blk_aio_pwritev(b->blk, offset, b->qiov, 0, bench_cb, b); | |
4391 | } else { | |
4392 | acb = blk_aio_preadv(b->blk, offset, b->qiov, 0, bench_cb, b); | |
4393 | } | |
4394 | if (!acb) { | |
4395 | error_report("Failed to issue request"); | |
4396 | exit(EXIT_FAILURE); | |
4397 | } | |
4398 | } | |
4399 | } | |
4400 | ||
4401 | static int img_bench(int argc, char **argv) | |
4402 | { | |
4403 | int c, ret = 0; | |
4404 | const char *fmt = NULL, *filename; | |
4405 | bool quiet = false; | |
4406 | bool image_opts = false; | |
4407 | bool is_write = false; | |
4408 | int count = 75000; | |
4409 | int depth = 64; | |
4410 | int64_t offset = 0; | |
4411 | size_t bufsize = 4096; | |
4412 | int pattern = 0; | |
4413 | size_t step = 0; | |
4414 | int flush_interval = 0; | |
4415 | bool drain_on_flush = true; | |
4416 | int64_t image_size; | |
4417 | BlockBackend *blk = NULL; | |
4418 | BenchData data = {}; | |
4419 | int flags = 0; | |
4420 | bool writethrough = false; | |
4421 | struct timeval t1, t2; | |
4422 | int i; | |
4423 | bool force_share = false; | |
4424 | size_t buf_size; | |
4425 | ||
4426 | for (;;) { | |
4427 | static const struct option long_options[] = { | |
4428 | {"help", no_argument, 0, 'h'}, | |
4429 | {"flush-interval", required_argument, 0, OPTION_FLUSH_INTERVAL}, | |
4430 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
4431 | {"pattern", required_argument, 0, OPTION_PATTERN}, | |
4432 | {"no-drain", no_argument, 0, OPTION_NO_DRAIN}, | |
4433 | {"force-share", no_argument, 0, 'U'}, | |
4434 | {0, 0, 0, 0} | |
4435 | }; | |
4436 | c = getopt_long(argc, argv, ":hc:d:f:ni:o:qs:S:t:wU", long_options, | |
4437 | NULL); | |
4438 | if (c == -1) { | |
4439 | break; | |
4440 | } | |
4441 | ||
4442 | switch (c) { | |
4443 | case ':': | |
4444 | missing_argument(argv[optind - 1]); | |
4445 | break; | |
4446 | case '?': | |
4447 | unrecognized_option(argv[optind - 1]); | |
4448 | break; | |
4449 | case 'h': | |
4450 | help(); | |
4451 | break; | |
4452 | case 'c': | |
4453 | { | |
4454 | unsigned long res; | |
4455 | ||
4456 | if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) { | |
4457 | error_report("Invalid request count specified"); | |
4458 | return 1; | |
4459 | } | |
4460 | count = res; | |
4461 | break; | |
4462 | } | |
4463 | case 'd': | |
4464 | { | |
4465 | unsigned long res; | |
4466 | ||
4467 | if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) { | |
4468 | error_report("Invalid queue depth specified"); | |
4469 | return 1; | |
4470 | } | |
4471 | depth = res; | |
4472 | break; | |
4473 | } | |
4474 | case 'f': | |
4475 | fmt = optarg; | |
4476 | break; | |
4477 | case 'n': | |
4478 | flags |= BDRV_O_NATIVE_AIO; | |
4479 | break; | |
4480 | case 'i': | |
4481 | ret = bdrv_parse_aio(optarg, &flags); | |
4482 | if (ret < 0) { | |
4483 | error_report("Invalid aio option: %s", optarg); | |
4484 | ret = -1; | |
4485 | goto out; | |
4486 | } | |
4487 | break; | |
4488 | case 'o': | |
4489 | { | |
4490 | offset = cvtnum("offset", optarg); | |
4491 | if (offset < 0) { | |
4492 | return 1; | |
4493 | } | |
4494 | break; | |
4495 | } | |
4496 | break; | |
4497 | case 'q': | |
4498 | quiet = true; | |
4499 | break; | |
4500 | case 's': | |
4501 | { | |
4502 | int64_t sval; | |
4503 | ||
4504 | sval = cvtnum_full("buffer size", optarg, 0, INT_MAX); | |
4505 | if (sval < 0) { | |
4506 | return 1; | |
4507 | } | |
4508 | ||
4509 | bufsize = sval; | |
4510 | break; | |
4511 | } | |
4512 | case 'S': | |
4513 | { | |
4514 | int64_t sval; | |
4515 | ||
4516 | sval = cvtnum_full("step_size", optarg, 0, INT_MAX); | |
4517 | if (sval < 0) { | |
4518 | return 1; | |
4519 | } | |
4520 | ||
4521 | step = sval; | |
4522 | break; | |
4523 | } | |
4524 | case 't': | |
4525 | ret = bdrv_parse_cache_mode(optarg, &flags, &writethrough); | |
4526 | if (ret < 0) { | |
4527 | error_report("Invalid cache mode"); | |
4528 | ret = -1; | |
4529 | goto out; | |
4530 | } | |
4531 | break; | |
4532 | case 'w': | |
4533 | flags |= BDRV_O_RDWR; | |
4534 | is_write = true; | |
4535 | break; | |
4536 | case 'U': | |
4537 | force_share = true; | |
4538 | break; | |
4539 | case OPTION_PATTERN: | |
4540 | { | |
4541 | unsigned long res; | |
4542 | ||
4543 | if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > 0xff) { | |
4544 | error_report("Invalid pattern byte specified"); | |
4545 | return 1; | |
4546 | } | |
4547 | pattern = res; | |
4548 | break; | |
4549 | } | |
4550 | case OPTION_FLUSH_INTERVAL: | |
4551 | { | |
4552 | unsigned long res; | |
4553 | ||
4554 | if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) { | |
4555 | error_report("Invalid flush interval specified"); | |
4556 | return 1; | |
4557 | } | |
4558 | flush_interval = res; | |
4559 | break; | |
4560 | } | |
4561 | case OPTION_NO_DRAIN: | |
4562 | drain_on_flush = false; | |
4563 | break; | |
4564 | case OPTION_IMAGE_OPTS: | |
4565 | image_opts = true; | |
4566 | break; | |
4567 | } | |
4568 | } | |
4569 | ||
4570 | if (optind != argc - 1) { | |
4571 | error_exit("Expecting one image file name"); | |
4572 | } | |
4573 | filename = argv[argc - 1]; | |
4574 | ||
4575 | if (!is_write && flush_interval) { | |
4576 | error_report("--flush-interval is only available in write tests"); | |
4577 | ret = -1; | |
4578 | goto out; | |
4579 | } | |
4580 | if (flush_interval && flush_interval < depth) { | |
4581 | error_report("Flush interval can't be smaller than depth"); | |
4582 | ret = -1; | |
4583 | goto out; | |
4584 | } | |
4585 | ||
4586 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet, | |
4587 | force_share); | |
4588 | if (!blk) { | |
4589 | ret = -1; | |
4590 | goto out; | |
4591 | } | |
4592 | ||
4593 | image_size = blk_getlength(blk); | |
4594 | if (image_size < 0) { | |
4595 | ret = image_size; | |
4596 | goto out; | |
4597 | } | |
4598 | ||
4599 | data = (BenchData) { | |
4600 | .blk = blk, | |
4601 | .image_size = image_size, | |
4602 | .bufsize = bufsize, | |
4603 | .step = step ?: bufsize, | |
4604 | .nrreq = depth, | |
4605 | .n = count, | |
4606 | .offset = offset, | |
4607 | .write = is_write, | |
4608 | .flush_interval = flush_interval, | |
4609 | .drain_on_flush = drain_on_flush, | |
4610 | }; | |
4611 | printf("Sending %d %s requests, %d bytes each, %d in parallel " | |
4612 | "(starting at offset %" PRId64 ", step size %d)\n", | |
4613 | data.n, data.write ? "write" : "read", data.bufsize, data.nrreq, | |
4614 | data.offset, data.step); | |
4615 | if (flush_interval) { | |
4616 | printf("Sending flush every %d requests\n", flush_interval); | |
4617 | } | |
4618 | ||
4619 | buf_size = data.nrreq * data.bufsize; | |
4620 | data.buf = blk_blockalign(blk, buf_size); | |
4621 | memset(data.buf, pattern, data.nrreq * data.bufsize); | |
4622 | ||
4623 | blk_register_buf(blk, data.buf, buf_size); | |
4624 | ||
4625 | data.qiov = g_new(QEMUIOVector, data.nrreq); | |
4626 | for (i = 0; i < data.nrreq; i++) { | |
4627 | qemu_iovec_init(&data.qiov[i], 1); | |
4628 | qemu_iovec_add(&data.qiov[i], | |
4629 | data.buf + i * data.bufsize, data.bufsize); | |
4630 | } | |
4631 | ||
4632 | gettimeofday(&t1, NULL); | |
4633 | bench_cb(&data, 0); | |
4634 | ||
4635 | while (data.n > 0) { | |
4636 | main_loop_wait(false); | |
4637 | } | |
4638 | gettimeofday(&t2, NULL); | |
4639 | ||
4640 | printf("Run completed in %3.3f seconds.\n", | |
4641 | (t2.tv_sec - t1.tv_sec) | |
4642 | + ((double)(t2.tv_usec - t1.tv_usec) / 1000000)); | |
4643 | ||
4644 | out: | |
4645 | if (data.buf) { | |
4646 | blk_unregister_buf(blk, data.buf); | |
4647 | } | |
4648 | qemu_vfree(data.buf); | |
4649 | blk_unref(blk); | |
4650 | ||
4651 | if (ret) { | |
4652 | return 1; | |
4653 | } | |
4654 | return 0; | |
4655 | } | |
4656 | ||
4657 | enum ImgBitmapAct { | |
4658 | BITMAP_ADD, | |
4659 | BITMAP_REMOVE, | |
4660 | BITMAP_CLEAR, | |
4661 | BITMAP_ENABLE, | |
4662 | BITMAP_DISABLE, | |
4663 | BITMAP_MERGE, | |
4664 | }; | |
4665 | typedef struct ImgBitmapAction { | |
4666 | enum ImgBitmapAct act; | |
4667 | const char *src; /* only used for merge */ | |
4668 | QSIMPLEQ_ENTRY(ImgBitmapAction) next; | |
4669 | } ImgBitmapAction; | |
4670 | ||
4671 | static int img_bitmap(int argc, char **argv) | |
4672 | { | |
4673 | Error *err = NULL; | |
4674 | int c, ret = 1; | |
4675 | QemuOpts *opts = NULL; | |
4676 | const char *fmt = NULL, *src_fmt = NULL, *src_filename = NULL; | |
4677 | const char *filename, *bitmap; | |
4678 | BlockBackend *blk = NULL, *src = NULL; | |
4679 | BlockDriverState *bs = NULL, *src_bs = NULL; | |
4680 | bool image_opts = false; | |
4681 | int64_t granularity = 0; | |
4682 | bool add = false, merge = false; | |
4683 | QSIMPLEQ_HEAD(, ImgBitmapAction) actions; | |
4684 | ImgBitmapAction *act, *act_next; | |
4685 | const char *op; | |
4686 | ||
4687 | QSIMPLEQ_INIT(&actions); | |
4688 | ||
4689 | for (;;) { | |
4690 | static const struct option long_options[] = { | |
4691 | {"help", no_argument, 0, 'h'}, | |
4692 | {"object", required_argument, 0, OPTION_OBJECT}, | |
4693 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
4694 | {"add", no_argument, 0, OPTION_ADD}, | |
4695 | {"remove", no_argument, 0, OPTION_REMOVE}, | |
4696 | {"clear", no_argument, 0, OPTION_CLEAR}, | |
4697 | {"enable", no_argument, 0, OPTION_ENABLE}, | |
4698 | {"disable", no_argument, 0, OPTION_DISABLE}, | |
4699 | {"merge", required_argument, 0, OPTION_MERGE}, | |
4700 | {"granularity", required_argument, 0, 'g'}, | |
4701 | {"source-file", required_argument, 0, 'b'}, | |
4702 | {"source-format", required_argument, 0, 'F'}, | |
4703 | {0, 0, 0, 0} | |
4704 | }; | |
4705 | c = getopt_long(argc, argv, ":b:f:F:g:h", long_options, NULL); | |
4706 | if (c == -1) { | |
4707 | break; | |
4708 | } | |
4709 | ||
4710 | switch (c) { | |
4711 | case ':': | |
4712 | missing_argument(argv[optind - 1]); | |
4713 | break; | |
4714 | case '?': | |
4715 | unrecognized_option(argv[optind - 1]); | |
4716 | break; | |
4717 | case 'h': | |
4718 | help(); | |
4719 | break; | |
4720 | case 'b': | |
4721 | src_filename = optarg; | |
4722 | break; | |
4723 | case 'f': | |
4724 | fmt = optarg; | |
4725 | break; | |
4726 | case 'F': | |
4727 | src_fmt = optarg; | |
4728 | break; | |
4729 | case 'g': | |
4730 | granularity = cvtnum("granularity", optarg); | |
4731 | if (granularity < 0) { | |
4732 | return 1; | |
4733 | } | |
4734 | break; | |
4735 | case OPTION_ADD: | |
4736 | act = g_new0(ImgBitmapAction, 1); | |
4737 | act->act = BITMAP_ADD; | |
4738 | QSIMPLEQ_INSERT_TAIL(&actions, act, next); | |
4739 | add = true; | |
4740 | break; | |
4741 | case OPTION_REMOVE: | |
4742 | act = g_new0(ImgBitmapAction, 1); | |
4743 | act->act = BITMAP_REMOVE; | |
4744 | QSIMPLEQ_INSERT_TAIL(&actions, act, next); | |
4745 | break; | |
4746 | case OPTION_CLEAR: | |
4747 | act = g_new0(ImgBitmapAction, 1); | |
4748 | act->act = BITMAP_CLEAR; | |
4749 | QSIMPLEQ_INSERT_TAIL(&actions, act, next); | |
4750 | break; | |
4751 | case OPTION_ENABLE: | |
4752 | act = g_new0(ImgBitmapAction, 1); | |
4753 | act->act = BITMAP_ENABLE; | |
4754 | QSIMPLEQ_INSERT_TAIL(&actions, act, next); | |
4755 | break; | |
4756 | case OPTION_DISABLE: | |
4757 | act = g_new0(ImgBitmapAction, 1); | |
4758 | act->act = BITMAP_DISABLE; | |
4759 | QSIMPLEQ_INSERT_TAIL(&actions, act, next); | |
4760 | break; | |
4761 | case OPTION_MERGE: | |
4762 | act = g_new0(ImgBitmapAction, 1); | |
4763 | act->act = BITMAP_MERGE; | |
4764 | act->src = optarg; | |
4765 | QSIMPLEQ_INSERT_TAIL(&actions, act, next); | |
4766 | merge = true; | |
4767 | break; | |
4768 | case OPTION_OBJECT: | |
4769 | opts = qemu_opts_parse_noisily(&qemu_object_opts, optarg, true); | |
4770 | if (!opts) { | |
4771 | goto out; | |
4772 | } | |
4773 | break; | |
4774 | case OPTION_IMAGE_OPTS: | |
4775 | image_opts = true; | |
4776 | break; | |
4777 | } | |
4778 | } | |
4779 | ||
4780 | if (qemu_opts_foreach(&qemu_object_opts, | |
4781 | user_creatable_add_opts_foreach, | |
4782 | qemu_img_object_print_help, &error_fatal)) { | |
4783 | goto out; | |
4784 | } | |
4785 | ||
4786 | if (QSIMPLEQ_EMPTY(&actions)) { | |
4787 | error_report("Need at least one of --add, --remove, --clear, " | |
4788 | "--enable, --disable, or --merge"); | |
4789 | goto out; | |
4790 | } | |
4791 | ||
4792 | if (granularity && !add) { | |
4793 | error_report("granularity only supported with --add"); | |
4794 | goto out; | |
4795 | } | |
4796 | if (src_fmt && !src_filename) { | |
4797 | error_report("-F only supported with -b"); | |
4798 | goto out; | |
4799 | } | |
4800 | if (src_filename && !merge) { | |
4801 | error_report("Merge bitmap source file only supported with " | |
4802 | "--merge"); | |
4803 | goto out; | |
4804 | } | |
4805 | ||
4806 | if (optind != argc - 2) { | |
4807 | error_report("Expecting filename and bitmap name"); | |
4808 | goto out; | |
4809 | } | |
4810 | ||
4811 | filename = argv[optind]; | |
4812 | bitmap = argv[optind + 1]; | |
4813 | ||
4814 | /* | |
4815 | * No need to open backing chains; we will be manipulating bitmaps | |
4816 | * directly in this image without reference to image contents. | |
4817 | */ | |
4818 | blk = img_open(image_opts, filename, fmt, BDRV_O_RDWR | BDRV_O_NO_BACKING, | |
4819 | false, false, false); | |
4820 | if (!blk) { | |
4821 | goto out; | |
4822 | } | |
4823 | bs = blk_bs(blk); | |
4824 | if (src_filename) { | |
4825 | src = img_open(false, src_filename, src_fmt, BDRV_O_NO_BACKING, | |
4826 | false, false, false); | |
4827 | if (!src) { | |
4828 | goto out; | |
4829 | } | |
4830 | src_bs = blk_bs(src); | |
4831 | } else { | |
4832 | src_bs = bs; | |
4833 | } | |
4834 | ||
4835 | QSIMPLEQ_FOREACH_SAFE(act, &actions, next, act_next) { | |
4836 | switch (act->act) { | |
4837 | case BITMAP_ADD: | |
4838 | qmp_block_dirty_bitmap_add(bs->node_name, bitmap, | |
4839 | !!granularity, granularity, true, true, | |
4840 | false, false, &err); | |
4841 | op = "add"; | |
4842 | break; | |
4843 | case BITMAP_REMOVE: | |
4844 | qmp_block_dirty_bitmap_remove(bs->node_name, bitmap, &err); | |
4845 | op = "remove"; | |
4846 | break; | |
4847 | case BITMAP_CLEAR: | |
4848 | qmp_block_dirty_bitmap_clear(bs->node_name, bitmap, &err); | |
4849 | op = "clear"; | |
4850 | break; | |
4851 | case BITMAP_ENABLE: | |
4852 | qmp_block_dirty_bitmap_enable(bs->node_name, bitmap, &err); | |
4853 | op = "enable"; | |
4854 | break; | |
4855 | case BITMAP_DISABLE: | |
4856 | qmp_block_dirty_bitmap_disable(bs->node_name, bitmap, &err); | |
4857 | op = "disable"; | |
4858 | break; | |
4859 | case BITMAP_MERGE: | |
4860 | do_dirty_bitmap_merge(bs->node_name, bitmap, src_bs->node_name, | |
4861 | act->src, &err); | |
4862 | op = "merge"; | |
4863 | break; | |
4864 | default: | |
4865 | g_assert_not_reached(); | |
4866 | } | |
4867 | ||
4868 | if (err) { | |
4869 | error_reportf_err(err, "Operation %s on bitmap %s failed: ", | |
4870 | op, bitmap); | |
4871 | goto out; | |
4872 | } | |
4873 | g_free(act); | |
4874 | } | |
4875 | ||
4876 | ret = 0; | |
4877 | ||
4878 | out: | |
4879 | blk_unref(src); | |
4880 | blk_unref(blk); | |
4881 | qemu_opts_del(opts); | |
4882 | return ret; | |
4883 | } | |
4884 | ||
4885 | #define C_BS 01 | |
4886 | #define C_COUNT 02 | |
4887 | #define C_IF 04 | |
4888 | #define C_OF 010 | |
4889 | #define C_SKIP 020 | |
4890 | ||
4891 | struct DdInfo { | |
4892 | unsigned int flags; | |
4893 | int64_t count; | |
4894 | }; | |
4895 | ||
4896 | struct DdIo { | |
4897 | int bsz; /* Block size */ | |
4898 | char *filename; | |
4899 | uint8_t *buf; | |
4900 | int64_t offset; | |
4901 | }; | |
4902 | ||
4903 | struct DdOpts { | |
4904 | const char *name; | |
4905 | int (*f)(const char *, struct DdIo *, struct DdIo *, struct DdInfo *); | |
4906 | unsigned int flag; | |
4907 | }; | |
4908 | ||
4909 | static int img_dd_bs(const char *arg, | |
4910 | struct DdIo *in, struct DdIo *out, | |
4911 | struct DdInfo *dd) | |
4912 | { | |
4913 | int64_t res; | |
4914 | ||
4915 | res = cvtnum_full("bs", arg, 1, INT_MAX); | |
4916 | ||
4917 | if (res < 0) { | |
4918 | return 1; | |
4919 | } | |
4920 | in->bsz = out->bsz = res; | |
4921 | ||
4922 | return 0; | |
4923 | } | |
4924 | ||
4925 | static int img_dd_count(const char *arg, | |
4926 | struct DdIo *in, struct DdIo *out, | |
4927 | struct DdInfo *dd) | |
4928 | { | |
4929 | dd->count = cvtnum("count", arg); | |
4930 | ||
4931 | if (dd->count < 0) { | |
4932 | return 1; | |
4933 | } | |
4934 | ||
4935 | return 0; | |
4936 | } | |
4937 | ||
4938 | static int img_dd_if(const char *arg, | |
4939 | struct DdIo *in, struct DdIo *out, | |
4940 | struct DdInfo *dd) | |
4941 | { | |
4942 | in->filename = g_strdup(arg); | |
4943 | ||
4944 | return 0; | |
4945 | } | |
4946 | ||
4947 | static int img_dd_of(const char *arg, | |
4948 | struct DdIo *in, struct DdIo *out, | |
4949 | struct DdInfo *dd) | |
4950 | { | |
4951 | out->filename = g_strdup(arg); | |
4952 | ||
4953 | return 0; | |
4954 | } | |
4955 | ||
4956 | static int img_dd_skip(const char *arg, | |
4957 | struct DdIo *in, struct DdIo *out, | |
4958 | struct DdInfo *dd) | |
4959 | { | |
4960 | in->offset = cvtnum("skip", arg); | |
4961 | ||
4962 | if (in->offset < 0) { | |
4963 | return 1; | |
4964 | } | |
4965 | ||
4966 | return 0; | |
4967 | } | |
4968 | ||
4969 | static int img_dd(int argc, char **argv) | |
4970 | { | |
4971 | int ret = 0; | |
4972 | char *arg = NULL; | |
4973 | char *tmp; | |
4974 | BlockDriver *drv = NULL, *proto_drv = NULL; | |
4975 | BlockBackend *blk1 = NULL, *blk2 = NULL; | |
4976 | QemuOpts *opts = NULL; | |
4977 | QemuOptsList *create_opts = NULL; | |
4978 | Error *local_err = NULL; | |
4979 | bool image_opts = false; | |
4980 | int c, i; | |
4981 | const char *out_fmt = "raw"; | |
4982 | const char *fmt = NULL; | |
4983 | int64_t size = 0; | |
4984 | int64_t block_count = 0, out_pos, in_pos; | |
4985 | bool force_share = false; | |
4986 | struct DdInfo dd = { | |
4987 | .flags = 0, | |
4988 | .count = 0, | |
4989 | }; | |
4990 | struct DdIo in = { | |
4991 | .bsz = 512, /* Block size is by default 512 bytes */ | |
4992 | .filename = NULL, | |
4993 | .buf = NULL, | |
4994 | .offset = 0 | |
4995 | }; | |
4996 | struct DdIo out = { | |
4997 | .bsz = 512, | |
4998 | .filename = NULL, | |
4999 | .buf = NULL, | |
5000 | .offset = 0 | |
5001 | }; | |
5002 | ||
5003 | const struct DdOpts options[] = { | |
5004 | { "bs", img_dd_bs, C_BS }, | |
5005 | { "count", img_dd_count, C_COUNT }, | |
5006 | { "if", img_dd_if, C_IF }, | |
5007 | { "of", img_dd_of, C_OF }, | |
5008 | { "skip", img_dd_skip, C_SKIP }, | |
5009 | { NULL, NULL, 0 } | |
5010 | }; | |
5011 | const struct option long_options[] = { | |
5012 | { "help", no_argument, 0, 'h'}, | |
5013 | { "object", required_argument, 0, OPTION_OBJECT}, | |
5014 | { "image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
5015 | { "force-share", no_argument, 0, 'U'}, | |
5016 | { 0, 0, 0, 0 } | |
5017 | }; | |
5018 | ||
5019 | while ((c = getopt_long(argc, argv, ":hf:O:U", long_options, NULL))) { | |
5020 | if (c == EOF) { | |
5021 | break; | |
5022 | } | |
5023 | switch (c) { | |
5024 | case 'O': | |
5025 | out_fmt = optarg; | |
5026 | break; | |
5027 | case 'f': | |
5028 | fmt = optarg; | |
5029 | break; | |
5030 | case ':': | |
5031 | missing_argument(argv[optind - 1]); | |
5032 | break; | |
5033 | case '?': | |
5034 | unrecognized_option(argv[optind - 1]); | |
5035 | break; | |
5036 | case 'h': | |
5037 | help(); | |
5038 | break; | |
5039 | case 'U': | |
5040 | force_share = true; | |
5041 | break; | |
5042 | case OPTION_OBJECT: | |
5043 | if (!qemu_opts_parse_noisily(&qemu_object_opts, optarg, true)) { | |
5044 | ret = -1; | |
5045 | goto out; | |
5046 | } | |
5047 | break; | |
5048 | case OPTION_IMAGE_OPTS: | |
5049 | image_opts = true; | |
5050 | break; | |
5051 | } | |
5052 | } | |
5053 | ||
5054 | for (i = optind; i < argc; i++) { | |
5055 | int j; | |
5056 | arg = g_strdup(argv[i]); | |
5057 | ||
5058 | tmp = strchr(arg, '='); | |
5059 | if (tmp == NULL) { | |
5060 | error_report("unrecognized operand %s", arg); | |
5061 | ret = -1; | |
5062 | goto out; | |
5063 | } | |
5064 | ||
5065 | *tmp++ = '\0'; | |
5066 | ||
5067 | for (j = 0; options[j].name != NULL; j++) { | |
5068 | if (!strcmp(arg, options[j].name)) { | |
5069 | break; | |
5070 | } | |
5071 | } | |
5072 | if (options[j].name == NULL) { | |
5073 | error_report("unrecognized operand %s", arg); | |
5074 | ret = -1; | |
5075 | goto out; | |
5076 | } | |
5077 | ||
5078 | if (options[j].f(tmp, &in, &out, &dd) != 0) { | |
5079 | ret = -1; | |
5080 | goto out; | |
5081 | } | |
5082 | dd.flags |= options[j].flag; | |
5083 | g_free(arg); | |
5084 | arg = NULL; | |
5085 | } | |
5086 | ||
5087 | if (!(dd.flags & C_IF && dd.flags & C_OF)) { | |
5088 | error_report("Must specify both input and output files"); | |
5089 | ret = -1; | |
5090 | goto out; | |
5091 | } | |
5092 | ||
5093 | if (qemu_opts_foreach(&qemu_object_opts, | |
5094 | user_creatable_add_opts_foreach, | |
5095 | qemu_img_object_print_help, &error_fatal)) { | |
5096 | ret = -1; | |
5097 | goto out; | |
5098 | } | |
5099 | ||
5100 | blk1 = img_open(image_opts, in.filename, fmt, 0, false, false, | |
5101 | force_share); | |
5102 | ||
5103 | if (!blk1) { | |
5104 | ret = -1; | |
5105 | goto out; | |
5106 | } | |
5107 | ||
5108 | drv = bdrv_find_format(out_fmt); | |
5109 | if (!drv) { | |
5110 | error_report("Unknown file format"); | |
5111 | ret = -1; | |
5112 | goto out; | |
5113 | } | |
5114 | proto_drv = bdrv_find_protocol(out.filename, true, &local_err); | |
5115 | ||
5116 | if (!proto_drv) { | |
5117 | error_report_err(local_err); | |
5118 | ret = -1; | |
5119 | goto out; | |
5120 | } | |
5121 | if (!drv->create_opts) { | |
5122 | error_report("Format driver '%s' does not support image creation", | |
5123 | drv->format_name); | |
5124 | ret = -1; | |
5125 | goto out; | |
5126 | } | |
5127 | if (!proto_drv->create_opts) { | |
5128 | error_report("Protocol driver '%s' does not support image creation", | |
5129 | proto_drv->format_name); | |
5130 | ret = -1; | |
5131 | goto out; | |
5132 | } | |
5133 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
5134 | create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); | |
5135 | ||
5136 | opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); | |
5137 | ||
5138 | size = blk_getlength(blk1); | |
5139 | if (size < 0) { | |
5140 | error_report("Failed to get size for '%s'", in.filename); | |
5141 | ret = -1; | |
5142 | goto out; | |
5143 | } | |
5144 | ||
5145 | if (dd.flags & C_COUNT && dd.count <= INT64_MAX / in.bsz && | |
5146 | dd.count * in.bsz < size) { | |
5147 | size = dd.count * in.bsz; | |
5148 | } | |
5149 | ||
5150 | /* Overflow means the specified offset is beyond input image's size */ | |
5151 | if (dd.flags & C_SKIP && (in.offset > INT64_MAX / in.bsz || | |
5152 | size < in.bsz * in.offset)) { | |
5153 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, 0, &error_abort); | |
5154 | } else { | |
5155 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, | |
5156 | size - in.bsz * in.offset, &error_abort); | |
5157 | } | |
5158 | ||
5159 | ret = bdrv_create(drv, out.filename, opts, &local_err); | |
5160 | if (ret < 0) { | |
5161 | error_reportf_err(local_err, | |
5162 | "%s: error while creating output image: ", | |
5163 | out.filename); | |
5164 | ret = -1; | |
5165 | goto out; | |
5166 | } | |
5167 | ||
5168 | /* TODO, we can't honour --image-opts for the target, | |
5169 | * since it needs to be given in a format compatible | |
5170 | * with the bdrv_create() call above which does not | |
5171 | * support image-opts style. | |
5172 | */ | |
5173 | blk2 = img_open_file(out.filename, NULL, out_fmt, BDRV_O_RDWR, | |
5174 | false, false, false); | |
5175 | ||
5176 | if (!blk2) { | |
5177 | ret = -1; | |
5178 | goto out; | |
5179 | } | |
5180 | ||
5181 | if (dd.flags & C_SKIP && (in.offset > INT64_MAX / in.bsz || | |
5182 | size < in.offset * in.bsz)) { | |
5183 | /* We give a warning if the skip option is bigger than the input | |
5184 | * size and create an empty output disk image (i.e. like dd(1)). | |
5185 | */ | |
5186 | error_report("%s: cannot skip to specified offset", in.filename); | |
5187 | in_pos = size; | |
5188 | } else { | |
5189 | in_pos = in.offset * in.bsz; | |
5190 | } | |
5191 | ||
5192 | in.buf = g_new(uint8_t, in.bsz); | |
5193 | ||
5194 | for (out_pos = 0; in_pos < size; block_count++) { | |
5195 | int in_ret, out_ret; | |
5196 | ||
5197 | if (in_pos + in.bsz > size) { | |
5198 | in_ret = blk_pread(blk1, in_pos, in.buf, size - in_pos); | |
5199 | } else { | |
5200 | in_ret = blk_pread(blk1, in_pos, in.buf, in.bsz); | |
5201 | } | |
5202 | if (in_ret < 0) { | |
5203 | error_report("error while reading from input image file: %s", | |
5204 | strerror(-in_ret)); | |
5205 | ret = -1; | |
5206 | goto out; | |
5207 | } | |
5208 | in_pos += in_ret; | |
5209 | ||
5210 | out_ret = blk_pwrite(blk2, out_pos, in.buf, in_ret, 0); | |
5211 | ||
5212 | if (out_ret < 0) { | |
5213 | error_report("error while writing to output image file: %s", | |
5214 | strerror(-out_ret)); | |
5215 | ret = -1; | |
5216 | goto out; | |
5217 | } | |
5218 | out_pos += out_ret; | |
5219 | } | |
5220 | ||
5221 | out: | |
5222 | g_free(arg); | |
5223 | qemu_opts_del(opts); | |
5224 | qemu_opts_free(create_opts); | |
5225 | blk_unref(blk1); | |
5226 | blk_unref(blk2); | |
5227 | g_free(in.filename); | |
5228 | g_free(out.filename); | |
5229 | g_free(in.buf); | |
5230 | g_free(out.buf); | |
5231 | ||
5232 | if (ret) { | |
5233 | return 1; | |
5234 | } | |
5235 | return 0; | |
5236 | } | |
5237 | ||
5238 | static void dump_json_block_measure_info(BlockMeasureInfo *info) | |
5239 | { | |
5240 | QString *str; | |
5241 | QObject *obj; | |
5242 | Visitor *v = qobject_output_visitor_new(&obj); | |
5243 | ||
5244 | visit_type_BlockMeasureInfo(v, NULL, &info, &error_abort); | |
5245 | visit_complete(v, &obj); | |
5246 | str = qobject_to_json_pretty(obj); | |
5247 | assert(str != NULL); | |
5248 | printf("%s\n", qstring_get_str(str)); | |
5249 | qobject_unref(obj); | |
5250 | visit_free(v); | |
5251 | qobject_unref(str); | |
5252 | } | |
5253 | ||
5254 | static int img_measure(int argc, char **argv) | |
5255 | { | |
5256 | static const struct option long_options[] = { | |
5257 | {"help", no_argument, 0, 'h'}, | |
5258 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
5259 | {"object", required_argument, 0, OPTION_OBJECT}, | |
5260 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
5261 | {"size", required_argument, 0, OPTION_SIZE}, | |
5262 | {"force-share", no_argument, 0, 'U'}, | |
5263 | {0, 0, 0, 0} | |
5264 | }; | |
5265 | OutputFormat output_format = OFORMAT_HUMAN; | |
5266 | BlockBackend *in_blk = NULL; | |
5267 | BlockDriver *drv; | |
5268 | const char *filename = NULL; | |
5269 | const char *fmt = NULL; | |
5270 | const char *out_fmt = "raw"; | |
5271 | char *options = NULL; | |
5272 | char *snapshot_name = NULL; | |
5273 | bool force_share = false; | |
5274 | QemuOpts *opts = NULL; | |
5275 | QemuOpts *object_opts = NULL; | |
5276 | QemuOpts *sn_opts = NULL; | |
5277 | QemuOptsList *create_opts = NULL; | |
5278 | bool image_opts = false; | |
5279 | uint64_t img_size = UINT64_MAX; | |
5280 | BlockMeasureInfo *info = NULL; | |
5281 | Error *local_err = NULL; | |
5282 | int ret = 1; | |
5283 | int c; | |
5284 | ||
5285 | while ((c = getopt_long(argc, argv, "hf:O:o:l:U", | |
5286 | long_options, NULL)) != -1) { | |
5287 | switch (c) { | |
5288 | case '?': | |
5289 | case 'h': | |
5290 | help(); | |
5291 | break; | |
5292 | case 'f': | |
5293 | fmt = optarg; | |
5294 | break; | |
5295 | case 'O': | |
5296 | out_fmt = optarg; | |
5297 | break; | |
5298 | case 'o': | |
5299 | if (accumulate_options(&options, optarg) < 0) { | |
5300 | goto out; | |
5301 | } | |
5302 | break; | |
5303 | case 'l': | |
5304 | if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { | |
5305 | sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, | |
5306 | optarg, false); | |
5307 | if (!sn_opts) { | |
5308 | error_report("Failed in parsing snapshot param '%s'", | |
5309 | optarg); | |
5310 | goto out; | |
5311 | } | |
5312 | } else { | |
5313 | snapshot_name = optarg; | |
5314 | } | |
5315 | break; | |
5316 | case 'U': | |
5317 | force_share = true; | |
5318 | break; | |
5319 | case OPTION_OBJECT: | |
5320 | object_opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
5321 | optarg, true); | |
5322 | if (!object_opts) { | |
5323 | goto out; | |
5324 | } | |
5325 | break; | |
5326 | case OPTION_IMAGE_OPTS: | |
5327 | image_opts = true; | |
5328 | break; | |
5329 | case OPTION_OUTPUT: | |
5330 | if (!strcmp(optarg, "json")) { | |
5331 | output_format = OFORMAT_JSON; | |
5332 | } else if (!strcmp(optarg, "human")) { | |
5333 | output_format = OFORMAT_HUMAN; | |
5334 | } else { | |
5335 | error_report("--output must be used with human or json " | |
5336 | "as argument."); | |
5337 | goto out; | |
5338 | } | |
5339 | break; | |
5340 | case OPTION_SIZE: | |
5341 | { | |
5342 | int64_t sval; | |
5343 | ||
5344 | sval = cvtnum("image size", optarg); | |
5345 | if (sval < 0) { | |
5346 | goto out; | |
5347 | } | |
5348 | img_size = (uint64_t)sval; | |
5349 | } | |
5350 | break; | |
5351 | } | |
5352 | } | |
5353 | ||
5354 | if (qemu_opts_foreach(&qemu_object_opts, | |
5355 | user_creatable_add_opts_foreach, | |
5356 | qemu_img_object_print_help, &error_fatal)) { | |
5357 | goto out; | |
5358 | } | |
5359 | ||
5360 | if (argc - optind > 1) { | |
5361 | error_report("At most one filename argument is allowed."); | |
5362 | goto out; | |
5363 | } else if (argc - optind == 1) { | |
5364 | filename = argv[optind]; | |
5365 | } | |
5366 | ||
5367 | if (!filename && (image_opts || fmt || snapshot_name || sn_opts)) { | |
5368 | error_report("--image-opts, -f, and -l require a filename argument."); | |
5369 | goto out; | |
5370 | } | |
5371 | if (filename && img_size != UINT64_MAX) { | |
5372 | error_report("--size N cannot be used together with a filename."); | |
5373 | goto out; | |
5374 | } | |
5375 | if (!filename && img_size == UINT64_MAX) { | |
5376 | error_report("Either --size N or one filename must be specified."); | |
5377 | goto out; | |
5378 | } | |
5379 | ||
5380 | if (filename) { | |
5381 | in_blk = img_open(image_opts, filename, fmt, 0, | |
5382 | false, false, force_share); | |
5383 | if (!in_blk) { | |
5384 | goto out; | |
5385 | } | |
5386 | ||
5387 | if (sn_opts) { | |
5388 | bdrv_snapshot_load_tmp(blk_bs(in_blk), | |
5389 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), | |
5390 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), | |
5391 | &local_err); | |
5392 | } else if (snapshot_name != NULL) { | |
5393 | bdrv_snapshot_load_tmp_by_id_or_name(blk_bs(in_blk), | |
5394 | snapshot_name, &local_err); | |
5395 | } | |
5396 | if (local_err) { | |
5397 | error_reportf_err(local_err, "Failed to load snapshot: "); | |
5398 | goto out; | |
5399 | } | |
5400 | } | |
5401 | ||
5402 | drv = bdrv_find_format(out_fmt); | |
5403 | if (!drv) { | |
5404 | error_report("Unknown file format '%s'", out_fmt); | |
5405 | goto out; | |
5406 | } | |
5407 | if (!drv->create_opts) { | |
5408 | error_report("Format driver '%s' does not support image creation", | |
5409 | drv->format_name); | |
5410 | goto out; | |
5411 | } | |
5412 | ||
5413 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
5414 | create_opts = qemu_opts_append(create_opts, bdrv_file.create_opts); | |
5415 | opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); | |
5416 | if (options) { | |
5417 | if (!qemu_opts_do_parse(opts, options, NULL, &local_err)) { | |
5418 | error_report_err(local_err); | |
5419 | error_report("Invalid options for file format '%s'", out_fmt); | |
5420 | goto out; | |
5421 | } | |
5422 | } | |
5423 | if (img_size != UINT64_MAX) { | |
5424 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, img_size, &error_abort); | |
5425 | } | |
5426 | ||
5427 | info = bdrv_measure(drv, opts, in_blk ? blk_bs(in_blk) : NULL, &local_err); | |
5428 | if (local_err) { | |
5429 | error_report_err(local_err); | |
5430 | goto out; | |
5431 | } | |
5432 | ||
5433 | if (output_format == OFORMAT_HUMAN) { | |
5434 | printf("required size: %" PRIu64 "\n", info->required); | |
5435 | printf("fully allocated size: %" PRIu64 "\n", info->fully_allocated); | |
5436 | if (info->has_bitmaps) { | |
5437 | printf("bitmaps size: %" PRIu64 "\n", info->bitmaps); | |
5438 | } | |
5439 | } else { | |
5440 | dump_json_block_measure_info(info); | |
5441 | } | |
5442 | ||
5443 | ret = 0; | |
5444 | ||
5445 | out: | |
5446 | qapi_free_BlockMeasureInfo(info); | |
5447 | qemu_opts_del(object_opts); | |
5448 | qemu_opts_del(opts); | |
5449 | qemu_opts_del(sn_opts); | |
5450 | qemu_opts_free(create_opts); | |
5451 | g_free(options); | |
5452 | blk_unref(in_blk); | |
5453 | return ret; | |
5454 | } | |
5455 | ||
5456 | static const img_cmd_t img_cmds[] = { | |
5457 | #define DEF(option, callback, arg_string) \ | |
5458 | { option, callback }, | |
5459 | #include "qemu-img-cmds.h" | |
5460 | #undef DEF | |
5461 | { NULL, NULL, }, | |
5462 | }; | |
5463 | ||
5464 | int main(int argc, char **argv) | |
5465 | { | |
5466 | const img_cmd_t *cmd; | |
5467 | const char *cmdname; | |
5468 | Error *local_error = NULL; | |
5469 | char *trace_file = NULL; | |
5470 | int c; | |
5471 | static const struct option long_options[] = { | |
5472 | {"help", no_argument, 0, 'h'}, | |
5473 | {"version", no_argument, 0, 'V'}, | |
5474 | {"trace", required_argument, NULL, 'T'}, | |
5475 | {0, 0, 0, 0} | |
5476 | }; | |
5477 | ||
5478 | #ifdef CONFIG_POSIX | |
5479 | signal(SIGPIPE, SIG_IGN); | |
5480 | #endif | |
5481 | ||
5482 | socket_init(); | |
5483 | error_init(argv[0]); | |
5484 | module_call_init(MODULE_INIT_TRACE); | |
5485 | qemu_init_exec_dir(argv[0]); | |
5486 | ||
5487 | if (qemu_init_main_loop(&local_error)) { | |
5488 | error_report_err(local_error); | |
5489 | exit(EXIT_FAILURE); | |
5490 | } | |
5491 | ||
5492 | qcrypto_init(&error_fatal); | |
5493 | ||
5494 | module_call_init(MODULE_INIT_QOM); | |
5495 | bdrv_init(); | |
5496 | if (argc < 2) { | |
5497 | error_exit("Not enough arguments"); | |
5498 | } | |
5499 | ||
5500 | qemu_add_opts(&qemu_object_opts); | |
5501 | qemu_add_opts(&qemu_source_opts); | |
5502 | qemu_add_opts(&qemu_trace_opts); | |
5503 | ||
5504 | while ((c = getopt_long(argc, argv, "+:hVT:", long_options, NULL)) != -1) { | |
5505 | switch (c) { | |
5506 | case ':': | |
5507 | missing_argument(argv[optind - 1]); | |
5508 | return 0; | |
5509 | case '?': | |
5510 | unrecognized_option(argv[optind - 1]); | |
5511 | return 0; | |
5512 | case 'h': | |
5513 | help(); | |
5514 | return 0; | |
5515 | case 'V': | |
5516 | printf(QEMU_IMG_VERSION); | |
5517 | return 0; | |
5518 | case 'T': | |
5519 | g_free(trace_file); | |
5520 | trace_file = trace_opt_parse(optarg); | |
5521 | break; | |
5522 | } | |
5523 | } | |
5524 | ||
5525 | cmdname = argv[optind]; | |
5526 | ||
5527 | /* reset getopt_long scanning */ | |
5528 | argc -= optind; | |
5529 | if (argc < 1) { | |
5530 | return 0; | |
5531 | } | |
5532 | argv += optind; | |
5533 | qemu_reset_optind(); | |
5534 | ||
5535 | if (!trace_init_backends()) { | |
5536 | exit(1); | |
5537 | } | |
5538 | trace_init_file(trace_file); | |
5539 | qemu_set_log(LOG_TRACE); | |
5540 | ||
5541 | /* find the command */ | |
5542 | for (cmd = img_cmds; cmd->name != NULL; cmd++) { | |
5543 | if (!strcmp(cmdname, cmd->name)) { | |
5544 | return cmd->handler(argc, argv); | |
5545 | } | |
5546 | } | |
5547 | ||
5548 | /* not found */ | |
5549 | error_exit("Command not found: %s", cmdname); | |
5550 | } |