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7c673cae FG |
1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | ||
4 | #include "include/compat.h" | |
5 | #include "tools/rbd/ArgumentTypes.h" | |
6 | #include "tools/rbd/Shell.h" | |
7 | #include "tools/rbd/Utils.h" | |
8 | #include "include/Context.h" | |
9 | #include "common/errno.h" | |
10 | #include "common/Throttle.h" | |
11 | #include "include/encoding.h" | |
12 | #include <iostream> | |
13 | #include <fcntl.h> | |
14 | #include <stdlib.h> | |
15 | #include <boost/program_options.hpp> | |
16 | #include <boost/scope_exit.hpp> | |
17 | ||
18 | namespace rbd { | |
19 | namespace action { | |
20 | namespace export_full { | |
21 | ||
22 | struct ExportDiffContext { | |
23 | librbd::Image *image; | |
24 | int fd; | |
25 | int export_format; | |
26 | uint64_t totalsize; | |
27 | utils::ProgressContext pc; | |
28 | OrderedThrottle throttle; | |
29 | ||
30 | ExportDiffContext(librbd::Image *i, int f, uint64_t t, int max_ops, | |
31 | bool no_progress, int eformat) : | |
32 | image(i), fd(f), export_format(eformat), totalsize(t), pc("Exporting image", no_progress), | |
33 | throttle(max_ops, true) { | |
34 | } | |
35 | }; | |
36 | ||
37 | class C_ExportDiff : public Context { | |
38 | public: | |
39 | C_ExportDiff(ExportDiffContext *edc, uint64_t offset, uint64_t length, | |
40 | bool exists, int export_format) | |
41 | : m_export_diff_context(edc), m_offset(offset), m_length(length), | |
42 | m_exists(exists), m_export_format(export_format) { | |
43 | } | |
44 | ||
45 | int send() { | |
46 | if (m_export_diff_context->throttle.pending_error()) { | |
47 | return m_export_diff_context->throttle.wait_for_ret(); | |
48 | } | |
49 | ||
50 | C_OrderedThrottle *ctx = m_export_diff_context->throttle.start_op(this); | |
51 | if (m_exists) { | |
52 | librbd::RBD::AioCompletion *aio_completion = | |
53 | new librbd::RBD::AioCompletion(ctx, &utils::aio_context_callback); | |
54 | ||
55 | int op_flags = LIBRADOS_OP_FLAG_FADVISE_NOCACHE; | |
56 | int r = m_export_diff_context->image->aio_read2( | |
57 | m_offset, m_length, m_read_data, aio_completion, op_flags); | |
58 | if (r < 0) { | |
59 | aio_completion->release(); | |
60 | ctx->complete(r); | |
61 | } | |
62 | } else { | |
63 | ctx->complete(0); | |
64 | } | |
65 | return 0; | |
66 | } | |
67 | ||
68 | static int export_diff_cb(uint64_t offset, size_t length, int exists, | |
69 | void *arg) { | |
70 | ExportDiffContext *edc = reinterpret_cast<ExportDiffContext *>(arg); | |
71 | ||
72 | C_ExportDiff *context = new C_ExportDiff(edc, offset, length, exists, edc->export_format); | |
73 | return context->send(); | |
74 | } | |
75 | ||
76 | protected: | |
77 | void finish(int r) override { | |
78 | if (r >= 0) { | |
79 | if (m_exists) { | |
80 | m_exists = !m_read_data.is_zero(); | |
81 | } | |
82 | r = write_extent(m_export_diff_context, m_offset, m_length, m_exists, m_export_format); | |
83 | if (r == 0 && m_exists) { | |
84 | r = m_read_data.write_fd(m_export_diff_context->fd); | |
85 | } | |
86 | } | |
87 | m_export_diff_context->throttle.end_op(r); | |
88 | } | |
89 | ||
90 | private: | |
91 | ExportDiffContext *m_export_diff_context; | |
92 | uint64_t m_offset; | |
93 | uint64_t m_length; | |
94 | bool m_exists; | |
95 | int m_export_format; | |
96 | bufferlist m_read_data; | |
97 | ||
98 | static int write_extent(ExportDiffContext *edc, uint64_t offset, | |
99 | uint64_t length, bool exists, int export_format) { | |
100 | // extent | |
101 | bufferlist bl; | |
102 | __u8 tag = exists ? RBD_DIFF_WRITE : RBD_DIFF_ZERO; | |
103 | uint64_t len = 0; | |
104 | ::encode(tag, bl); | |
105 | if (export_format == 2) { | |
106 | if (tag == RBD_DIFF_WRITE) | |
107 | len = 8 + 8 + length; | |
108 | else | |
109 | len = 8 + 8; | |
110 | ::encode(len, bl); | |
111 | } | |
112 | ::encode(offset, bl); | |
113 | ::encode(length, bl); | |
114 | int r = bl.write_fd(edc->fd); | |
115 | ||
116 | edc->pc.update_progress(offset, edc->totalsize); | |
117 | return r; | |
118 | } | |
119 | }; | |
120 | ||
121 | ||
122 | int do_export_diff_fd(librbd::Image& image, const char *fromsnapname, | |
123 | const char *endsnapname, bool whole_object, | |
124 | int fd, bool no_progress, int export_format) | |
125 | { | |
126 | int r; | |
127 | librbd::image_info_t info; | |
128 | ||
129 | r = image.stat(info, sizeof(info)); | |
130 | if (r < 0) | |
131 | return r; | |
132 | ||
133 | { | |
134 | // header | |
135 | bufferlist bl; | |
136 | if (export_format == 1) | |
137 | bl.append(utils::RBD_DIFF_BANNER); | |
138 | else | |
139 | bl.append(utils::RBD_DIFF_BANNER_V2); | |
140 | ||
141 | __u8 tag; | |
142 | uint64_t len = 0; | |
143 | if (fromsnapname) { | |
144 | tag = RBD_DIFF_FROM_SNAP; | |
145 | ::encode(tag, bl); | |
146 | std::string from(fromsnapname); | |
147 | if (export_format == 2) { | |
148 | len = from.length() + 4; | |
149 | ::encode(len, bl); | |
150 | } | |
151 | ::encode(from, bl); | |
152 | } | |
153 | ||
154 | if (endsnapname) { | |
155 | tag = RBD_DIFF_TO_SNAP; | |
156 | ::encode(tag, bl); | |
157 | std::string to(endsnapname); | |
158 | if (export_format == 2) { | |
28e407b8 AA |
159 | len = to.length() + 4; |
160 | ::encode(len, bl); | |
7c673cae FG |
161 | } |
162 | ::encode(to, bl); | |
163 | } | |
164 | ||
28e407b8 AA |
165 | if (endsnapname && export_format == 2) { |
166 | tag = RBD_SNAP_PROTECTION_STATUS; | |
167 | encode(tag, bl); | |
168 | bool is_protected = false; | |
169 | r = image.snap_is_protected(endsnapname, &is_protected); | |
170 | if (r < 0) { | |
171 | return r; | |
172 | } | |
173 | len = 8; | |
174 | encode(len, bl); | |
175 | encode(is_protected, bl); | |
176 | } | |
177 | ||
7c673cae FG |
178 | tag = RBD_DIFF_IMAGE_SIZE; |
179 | ::encode(tag, bl); | |
180 | uint64_t endsize = info.size; | |
181 | if (export_format == 2) { | |
182 | len = 8; | |
183 | ::encode(len, bl); | |
184 | } | |
185 | ::encode(endsize, bl); | |
186 | ||
187 | r = bl.write_fd(fd); | |
188 | if (r < 0) { | |
189 | return r; | |
190 | } | |
191 | } | |
192 | ExportDiffContext edc(&image, fd, info.size, | |
181888fb FG |
193 | g_conf->get_val<int64_t>("rbd_concurrent_management_ops"), |
194 | no_progress, export_format); | |
7c673cae FG |
195 | r = image.diff_iterate2(fromsnapname, 0, info.size, true, whole_object, |
196 | &C_ExportDiff::export_diff_cb, (void *)&edc); | |
197 | if (r < 0) { | |
198 | goto out; | |
199 | } | |
200 | ||
201 | r = edc.throttle.wait_for_ret(); | |
202 | if (r < 0) { | |
203 | goto out; | |
204 | } | |
205 | ||
206 | { | |
207 | __u8 tag = RBD_DIFF_END; | |
208 | bufferlist bl; | |
209 | ::encode(tag, bl); | |
210 | r = bl.write_fd(fd); | |
211 | } | |
212 | ||
213 | out: | |
214 | if (r < 0) | |
215 | edc.pc.fail(); | |
216 | else | |
217 | edc.pc.finish(); | |
218 | ||
219 | return r; | |
220 | } | |
221 | ||
222 | int do_export_diff(librbd::Image& image, const char *fromsnapname, | |
223 | const char *endsnapname, bool whole_object, | |
224 | const char *path, bool no_progress) | |
225 | { | |
226 | int r; | |
227 | int fd; | |
228 | ||
229 | if (strcmp(path, "-") == 0) | |
230 | fd = STDOUT_FILENO; | |
231 | else | |
232 | fd = open(path, O_WRONLY | O_CREAT | O_EXCL, 0644); | |
233 | if (fd < 0) | |
234 | return -errno; | |
235 | ||
236 | r = do_export_diff_fd(image, fromsnapname, endsnapname, whole_object, fd, no_progress, 1); | |
237 | ||
238 | if (fd != 1) | |
239 | close(fd); | |
240 | if (r < 0 && fd != 1) { | |
241 | remove(path); | |
242 | } | |
243 | ||
244 | return r; | |
245 | } | |
246 | ||
247 | ||
248 | namespace at = argument_types; | |
249 | namespace po = boost::program_options; | |
250 | ||
251 | void get_arguments_diff(po::options_description *positional, | |
252 | po::options_description *options) { | |
253 | at::add_image_or_snap_spec_options(positional, options, | |
254 | at::ARGUMENT_MODIFIER_SOURCE); | |
255 | at::add_path_options(positional, options, | |
256 | "export file (or '-' for stdout)"); | |
257 | options->add_options() | |
258 | (at::FROM_SNAPSHOT_NAME.c_str(), po::value<std::string>(), | |
259 | "snapshot starting point") | |
260 | (at::WHOLE_OBJECT.c_str(), po::bool_switch(), "compare whole object"); | |
261 | at::add_no_progress_option(options); | |
262 | } | |
263 | ||
264 | int execute_diff(const po::variables_map &vm) { | |
265 | size_t arg_index = 0; | |
266 | std::string pool_name; | |
267 | std::string image_name; | |
268 | std::string snap_name; | |
269 | int r = utils::get_pool_image_snapshot_names( | |
270 | vm, at::ARGUMENT_MODIFIER_SOURCE, &arg_index, &pool_name, &image_name, | |
271 | &snap_name, utils::SNAPSHOT_PRESENCE_PERMITTED, | |
272 | utils::SPEC_VALIDATION_NONE); | |
273 | if (r < 0) { | |
274 | return r; | |
275 | } | |
276 | ||
277 | std::string path; | |
278 | r = utils::get_path(vm, utils::get_positional_argument(vm, 1), &path); | |
279 | if (r < 0) { | |
280 | return r; | |
281 | } | |
282 | ||
283 | std::string from_snap_name; | |
284 | if (vm.count(at::FROM_SNAPSHOT_NAME)) { | |
285 | from_snap_name = vm[at::FROM_SNAPSHOT_NAME].as<std::string>(); | |
286 | } | |
287 | ||
288 | librados::Rados rados; | |
289 | librados::IoCtx io_ctx; | |
290 | librbd::Image image; | |
291 | r = utils::init_and_open_image(pool_name, image_name, "", snap_name, true, | |
292 | &rados, &io_ctx, &image); | |
293 | if (r < 0) { | |
294 | return r; | |
295 | } | |
296 | ||
297 | r = do_export_diff(image, | |
298 | from_snap_name.empty() ? nullptr : from_snap_name.c_str(), | |
299 | snap_name.empty() ? nullptr : snap_name.c_str(), | |
300 | vm[at::WHOLE_OBJECT].as<bool>(), path.c_str(), | |
301 | vm[at::NO_PROGRESS].as<bool>()); | |
302 | if (r < 0) { | |
303 | std::cerr << "rbd: export-diff error: " << cpp_strerror(r) << std::endl; | |
304 | return r; | |
305 | } | |
306 | return 0; | |
307 | } | |
308 | ||
309 | Shell::SwitchArguments switched_arguments({at::WHOLE_OBJECT}); | |
310 | Shell::Action action_diff( | |
311 | {"export-diff"}, {}, "Export incremental diff to file.", "", | |
312 | &get_arguments_diff, &execute_diff); | |
313 | ||
314 | class C_Export : public Context | |
315 | { | |
316 | public: | |
317 | C_Export(SimpleThrottle &simple_throttle, librbd::Image &image, | |
318 | uint64_t fd_offset, uint64_t offset, uint64_t length, int fd) | |
319 | : m_aio_completion( | |
320 | new librbd::RBD::AioCompletion(this, &utils::aio_context_callback)), | |
321 | m_throttle(simple_throttle), m_image(image), m_dest_offset(fd_offset), | |
322 | m_offset(offset), m_length(length), m_fd(fd) | |
323 | { | |
324 | } | |
325 | ||
326 | void send() | |
327 | { | |
328 | m_throttle.start_op(); | |
329 | ||
330 | int op_flags = LIBRADOS_OP_FLAG_FADVISE_SEQUENTIAL | | |
331 | LIBRADOS_OP_FLAG_FADVISE_NOCACHE; | |
332 | int r = m_image.aio_read2(m_offset, m_length, m_bufferlist, | |
333 | m_aio_completion, op_flags); | |
334 | if (r < 0) { | |
335 | cerr << "rbd: error requesting read from source image" << std::endl; | |
336 | m_aio_completion->release(); | |
337 | m_throttle.end_op(r); | |
338 | } | |
339 | } | |
340 | ||
341 | void finish(int r) override | |
342 | { | |
343 | BOOST_SCOPE_EXIT((&m_throttle) (&r)) | |
344 | { | |
345 | m_throttle.end_op(r); | |
346 | } BOOST_SCOPE_EXIT_END | |
347 | ||
348 | if (r < 0) { | |
349 | cerr << "rbd: error reading from source image at offset " | |
350 | << m_offset << ": " << cpp_strerror(r) << std::endl; | |
351 | return; | |
352 | } | |
353 | ||
354 | assert(m_bufferlist.length() == static_cast<size_t>(r)); | |
355 | if (m_fd != STDOUT_FILENO) { | |
356 | if (m_bufferlist.is_zero()) { | |
357 | return; | |
358 | } | |
359 | ||
360 | uint64_t chkret = lseek64(m_fd, m_dest_offset, SEEK_SET); | |
361 | if (chkret != m_dest_offset) { | |
362 | cerr << "rbd: error seeking destination image to offset " | |
363 | << m_dest_offset << std::endl; | |
364 | r = -errno; | |
365 | return; | |
366 | } | |
367 | } | |
368 | ||
369 | r = m_bufferlist.write_fd(m_fd); | |
370 | if (r < 0) { | |
371 | cerr << "rbd: error writing to destination image at offset " | |
372 | << m_dest_offset << std::endl; | |
373 | } | |
374 | } | |
375 | ||
376 | private: | |
377 | librbd::RBD::AioCompletion *m_aio_completion; | |
378 | SimpleThrottle &m_throttle; | |
379 | librbd::Image &m_image; | |
380 | bufferlist m_bufferlist; | |
381 | uint64_t m_dest_offset; | |
382 | uint64_t m_offset; | |
383 | uint64_t m_length; | |
384 | int m_fd; | |
385 | }; | |
386 | ||
28e407b8 AA |
387 | const uint32_t MAX_KEYS = 64; |
388 | ||
7c673cae FG |
389 | static int do_export_v2(librbd::Image& image, librbd::image_info_t &info, int fd, |
390 | uint64_t period, int max_concurrent_ops, utils::ProgressContext &pc) | |
391 | { | |
392 | int r = 0; | |
393 | // header | |
394 | bufferlist bl; | |
395 | bl.append(utils::RBD_IMAGE_BANNER_V2); | |
396 | ||
397 | __u8 tag; | |
398 | uint64_t length; | |
399 | // encode order | |
400 | tag = RBD_EXPORT_IMAGE_ORDER; | |
401 | length = 8; | |
402 | ::encode(tag, bl); | |
403 | ::encode(length, bl); | |
404 | ::encode(uint64_t(info.order), bl); | |
405 | ||
406 | // encode features | |
407 | tag = RBD_EXPORT_IMAGE_FEATURES; | |
408 | uint64_t features; | |
409 | image.features(&features); | |
410 | length = 8; | |
411 | ::encode(tag, bl); | |
412 | ::encode(length, bl); | |
413 | ::encode(features, bl); | |
414 | ||
415 | // encode stripe_unit and stripe_count | |
416 | tag = RBD_EXPORT_IMAGE_STRIPE_UNIT; | |
417 | uint64_t stripe_unit; | |
418 | stripe_unit = image.get_stripe_unit(); | |
419 | length = 8; | |
420 | ::encode(tag, bl); | |
421 | ::encode(length, bl); | |
422 | ::encode(stripe_unit, bl); | |
423 | ||
424 | tag = RBD_EXPORT_IMAGE_STRIPE_COUNT; | |
425 | uint64_t stripe_count; | |
426 | stripe_count = image.get_stripe_count(); | |
427 | length = 8; | |
428 | ::encode(tag, bl); | |
429 | ::encode(length, bl); | |
430 | ::encode(stripe_count, bl); | |
431 | ||
28e407b8 AA |
432 | //retrieve metadata of image |
433 | std::map<std::string, string> imagemetas; | |
434 | std::string last_key; | |
435 | bool more_results = true; | |
436 | while (more_results) { | |
437 | std::map<std::string, bufferlist> pairs; | |
438 | r = image.metadata_list(last_key, MAX_KEYS, &pairs); | |
439 | if (r < 0) { | |
440 | std::cerr << "failed to retrieve metadata of image : " << cpp_strerror(r) | |
441 | << std::endl; | |
442 | return r; | |
443 | } | |
444 | ||
445 | if (!pairs.empty()) { | |
446 | last_key = pairs.rbegin()->first; | |
447 | ||
448 | for (auto kv : pairs) { | |
449 | std::string key = kv.first; | |
450 | std::string val(kv.second.c_str(), kv.second.length()); | |
451 | imagemetas[key] = val; | |
452 | } | |
453 | } | |
454 | more_results = (pairs.size() == MAX_KEYS); | |
455 | } | |
456 | ||
457 | //encode imageMeta key and value | |
458 | for (std::map<std::string, string>::iterator it = imagemetas.begin(); | |
459 | it != imagemetas.end(); ++it) { | |
460 | string key = it->first; | |
461 | string value = it->second; | |
462 | ||
463 | tag = RBD_EXPORT_IMAGE_META; | |
464 | length = key.length() + value.length() + 4 * 2; | |
465 | ::encode(tag, bl); | |
466 | ::encode(length, bl); | |
467 | ::encode(key, bl); | |
468 | ::encode(value, bl); | |
469 | } | |
470 | ||
7c673cae FG |
471 | // encode end tag |
472 | tag = RBD_EXPORT_IMAGE_END; | |
473 | ::encode(tag, bl); | |
474 | ||
475 | // write bl to fd. | |
476 | r = bl.write_fd(fd); | |
477 | if (r < 0) { | |
478 | return r; | |
479 | } | |
480 | ||
481 | // header for snapshots | |
482 | bl.clear(); | |
483 | bl.append(utils::RBD_IMAGE_DIFFS_BANNER_V2); | |
484 | ||
485 | std::vector<librbd::snap_info_t> snaps; | |
486 | r = image.snap_list(snaps); | |
487 | if (r < 0) { | |
488 | return r; | |
489 | } | |
490 | ||
491 | uint64_t diff_num = snaps.size() + 1; | |
492 | ::encode(diff_num, bl); | |
493 | ||
494 | r = bl.write_fd(fd); | |
495 | if (r < 0) { | |
496 | return r; | |
497 | } | |
498 | ||
499 | const char *last_snap = NULL; | |
500 | for (size_t i = 0; i < snaps.size(); ++i) { | |
501 | utils::snap_set(image, snaps[i].name.c_str()); | |
502 | r = do_export_diff_fd(image, last_snap, snaps[i].name.c_str(), false, fd, true, 2); | |
503 | if (r < 0) { | |
504 | return r; | |
505 | } | |
506 | pc.update_progress(i, snaps.size() + 1); | |
507 | last_snap = snaps[i].name.c_str(); | |
508 | } | |
509 | utils::snap_set(image, std::string("")); | |
510 | r = do_export_diff_fd(image, last_snap, nullptr, false, fd, true, 2); | |
511 | if (r < 0) { | |
512 | return r; | |
513 | } | |
514 | pc.update_progress(snaps.size() + 1, snaps.size() + 1); | |
515 | return r; | |
516 | } | |
517 | ||
518 | static int do_export_v1(librbd::Image& image, librbd::image_info_t &info, int fd, | |
519 | uint64_t period, int max_concurrent_ops, utils::ProgressContext &pc) | |
520 | { | |
521 | int r = 0; | |
522 | size_t file_size = 0; | |
523 | SimpleThrottle throttle(max_concurrent_ops, false); | |
524 | for (uint64_t offset = 0; offset < info.size; offset += period) { | |
525 | if (throttle.pending_error()) { | |
526 | break; | |
527 | } | |
528 | ||
529 | uint64_t length = min(period, info.size - offset); | |
530 | C_Export *ctx = new C_Export(throttle, image, file_size + offset, offset, length, fd); | |
531 | ctx->send(); | |
532 | ||
533 | pc.update_progress(offset, info.size); | |
534 | } | |
535 | ||
536 | file_size += info.size; | |
537 | r = throttle.wait_for_ret(); | |
538 | if (fd != 1) { | |
539 | if (r >= 0) { | |
540 | r = ftruncate(fd, file_size); | |
541 | if (r < 0) | |
542 | return r; | |
543 | ||
544 | uint64_t chkret = lseek64(fd, file_size, SEEK_SET); | |
545 | if (chkret != file_size) | |
546 | r = errno; | |
547 | } | |
548 | } | |
549 | return r; | |
550 | } | |
551 | ||
552 | static int do_export(librbd::Image& image, const char *path, bool no_progress, int export_format) | |
553 | { | |
554 | librbd::image_info_t info; | |
555 | int64_t r = image.stat(info, sizeof(info)); | |
556 | if (r < 0) | |
557 | return r; | |
558 | ||
559 | int fd; | |
560 | int max_concurrent_ops; | |
561 | bool to_stdout = (strcmp(path, "-") == 0); | |
562 | if (to_stdout) { | |
563 | fd = STDOUT_FILENO; | |
564 | max_concurrent_ops = 1; | |
565 | } else { | |
181888fb | 566 | max_concurrent_ops = g_conf->get_val<int64_t>("rbd_concurrent_management_ops"); |
7c673cae FG |
567 | fd = open(path, O_WRONLY | O_CREAT | O_EXCL, 0644); |
568 | if (fd < 0) { | |
569 | return -errno; | |
570 | } | |
571 | #ifdef HAVE_POSIX_FADVISE | |
572 | posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL); | |
573 | #endif | |
574 | } | |
575 | ||
576 | utils::ProgressContext pc("Exporting image", no_progress); | |
577 | uint64_t period = image.get_stripe_count() * (1ull << info.order); | |
578 | ||
579 | if (export_format == 1) | |
580 | r = do_export_v1(image, info, fd, period, max_concurrent_ops, pc); | |
581 | else | |
582 | r = do_export_v2(image, info, fd, period, max_concurrent_ops, pc); | |
583 | ||
584 | if (r < 0) | |
585 | pc.fail(); | |
586 | else | |
587 | pc.finish(); | |
588 | if (!to_stdout) | |
589 | close(fd); | |
590 | return r; | |
591 | } | |
592 | ||
593 | void get_arguments(po::options_description *positional, | |
594 | po::options_description *options) { | |
595 | at::add_image_or_snap_spec_options(positional, options, | |
596 | at::ARGUMENT_MODIFIER_SOURCE); | |
597 | at::add_path_options(positional, options, | |
598 | "export file (or '-' for stdout)"); | |
599 | at::add_no_progress_option(options); | |
600 | at::add_export_format_option(options); | |
601 | } | |
602 | ||
603 | int execute(const po::variables_map &vm) { | |
604 | size_t arg_index = 0; | |
605 | std::string pool_name; | |
606 | std::string image_name; | |
607 | std::string snap_name; | |
608 | int r = utils::get_pool_image_snapshot_names( | |
609 | vm, at::ARGUMENT_MODIFIER_SOURCE, &arg_index, &pool_name, &image_name, | |
610 | &snap_name, utils::SNAPSHOT_PRESENCE_PERMITTED, | |
611 | utils::SPEC_VALIDATION_NONE); | |
612 | if (r < 0) { | |
613 | return r; | |
614 | } | |
615 | ||
616 | std::string path; | |
617 | r = utils::get_path(vm, utils::get_positional_argument(vm, 1), &path); | |
618 | if (r < 0) { | |
619 | return r; | |
620 | } | |
621 | ||
622 | librados::Rados rados; | |
623 | librados::IoCtx io_ctx; | |
624 | librbd::Image image; | |
625 | r = utils::init_and_open_image(pool_name, image_name, "", snap_name, true, | |
626 | &rados, &io_ctx, &image); | |
627 | if (r < 0) { | |
628 | return r; | |
629 | } | |
630 | ||
631 | int format = 1; | |
632 | if (vm.count("export-format")) | |
633 | format = vm["export-format"].as<uint64_t>(); | |
634 | ||
635 | r = do_export(image, path.c_str(), vm[at::NO_PROGRESS].as<bool>(), format); | |
636 | if (r < 0) { | |
637 | std::cerr << "rbd: export error: " << cpp_strerror(r) << std::endl; | |
638 | return r; | |
639 | } | |
640 | return 0; | |
641 | } | |
642 | ||
643 | Shell::Action action( | |
644 | {"export"}, {}, "Export image to file.", "", &get_arguments, &execute); | |
645 | ||
646 | } // namespace export_full | |
647 | } // namespace action | |
648 | } // namespace rbd |