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1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | /* | |
4 | * Ceph - scalable distributed file system | |
5 | * | |
6 | * Copyright (C) 2017 Red Hat Ltd | |
7 | * | |
8 | * This is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License version 2.1, as published by the Free Software | |
11 | * Foundation. See file COPYING. | |
12 | * | |
13 | */ | |
14 | ||
15 | ||
16 | #include "OSDMonitor.h" | |
17 | #include "PGMonitor.h" | |
18 | ||
19 | #include "FSCommands.h" | |
20 | #include "MDSMonitor.h" | |
21 | ||
22 | ||
23 | ||
24 | static const string EXPERIMENTAL_WARNING("Warning! This feature is experimental." | |
25 | "It may cause problems up to and including data loss." | |
26 | "Consult the documentation at ceph.com, and if unsure, do not proceed." | |
27 | "Add --yes-i-really-mean-it if you are certain."); | |
28 | ||
29 | ||
30 | ||
31 | class FlagSetHandler : public FileSystemCommandHandler | |
32 | { | |
33 | public: | |
34 | FlagSetHandler() | |
35 | : FileSystemCommandHandler("fs flag set") | |
36 | { | |
37 | } | |
38 | ||
39 | int handle( | |
40 | Monitor *mon, | |
41 | FSMap &fsmap, | |
42 | MonOpRequestRef op, | |
43 | map<string, cmd_vartype> &cmdmap, | |
44 | std::stringstream &ss) override | |
45 | { | |
46 | string flag_name; | |
47 | cmd_getval(g_ceph_context, cmdmap, "flag_name", flag_name); | |
48 | ||
49 | string flag_val; | |
50 | cmd_getval(g_ceph_context, cmdmap, "val", flag_val); | |
51 | ||
52 | string confirm; | |
53 | cmd_getval(g_ceph_context, cmdmap, "confirm", confirm); | |
54 | ||
55 | if (flag_name == "enable_multiple") { | |
56 | bool flag_bool = false; | |
57 | int r = parse_bool(flag_val, &flag_bool, ss); | |
58 | if (r != 0) { | |
59 | ss << "Invalid boolean value '" << flag_val << "'"; | |
60 | return r; | |
61 | } | |
62 | ||
63 | bool jewel = mon->get_quorum_con_features() & CEPH_FEATURE_SERVER_JEWEL; | |
64 | if (flag_bool && !jewel) { | |
65 | ss << "Multiple-filesystems are forbidden until all mons are updated"; | |
66 | return -EINVAL; | |
67 | } | |
68 | if (confirm != "--yes-i-really-mean-it") { | |
69 | ss << EXPERIMENTAL_WARNING; | |
70 | } | |
71 | fsmap.set_enable_multiple(flag_bool); | |
72 | return 0; | |
73 | } else { | |
74 | ss << "Unknown flag '" << flag_name << "'"; | |
75 | return -EINVAL; | |
76 | } | |
77 | } | |
78 | }; | |
79 | ||
80 | class FsNewHandler : public FileSystemCommandHandler | |
81 | { | |
82 | public: | |
83 | FsNewHandler() | |
84 | : FileSystemCommandHandler("fs new") | |
85 | { | |
86 | } | |
87 | ||
88 | int handle( | |
89 | Monitor *mon, | |
90 | FSMap &fsmap, | |
91 | MonOpRequestRef op, | |
92 | map<string, cmd_vartype> &cmdmap, | |
93 | std::stringstream &ss) | |
94 | { | |
95 | string metadata_name; | |
96 | cmd_getval(g_ceph_context, cmdmap, "metadata", metadata_name); | |
97 | int64_t metadata = mon->osdmon()->osdmap.lookup_pg_pool_name(metadata_name); | |
98 | if (metadata < 0) { | |
99 | ss << "pool '" << metadata_name << "' does not exist"; | |
100 | return -ENOENT; | |
101 | } | |
102 | ||
103 | string force; | |
104 | cmd_getval(g_ceph_context,cmdmap, "force", force); | |
105 | int64_t metadata_num_objects = mon->pgmon()->pg_map.pg_pool_sum[metadata].stats.sum.num_objects; | |
106 | if (force != "--force" && metadata_num_objects > 0) { | |
107 | ss << "pool '" << metadata_name | |
108 | << "' already contains some objects. Use an empty pool instead."; | |
109 | return -EINVAL; | |
110 | } | |
111 | ||
112 | string data_name; | |
113 | cmd_getval(g_ceph_context, cmdmap, "data", data_name); | |
114 | int64_t data = mon->osdmon()->osdmap.lookup_pg_pool_name(data_name); | |
115 | if (data < 0) { | |
116 | ss << "pool '" << data_name << "' does not exist"; | |
117 | return -ENOENT; | |
118 | } | |
119 | if (data == 0) { | |
120 | ss << "pool '" << data_name << "' has id 0, which CephFS does not allow. Use another pool or recreate it to get a non-zero pool id."; | |
121 | return -EINVAL; | |
122 | } | |
123 | ||
124 | string fs_name; | |
125 | cmd_getval(g_ceph_context, cmdmap, "fs_name", fs_name); | |
126 | if (fs_name.empty()) { | |
127 | // Ensure fs name is not empty so that we can implement | |
128 | // commmands that refer to FS by name in future. | |
129 | ss << "Filesystem name may not be empty"; | |
130 | return -EINVAL; | |
131 | } | |
132 | ||
133 | if (fsmap.get_filesystem(fs_name)) { | |
134 | auto fs = fsmap.get_filesystem(fs_name); | |
135 | if (*(fs->mds_map.get_data_pools().begin()) == data | |
136 | && fs->mds_map.get_metadata_pool() == metadata) { | |
137 | // Identical FS created already, this is a no-op | |
138 | ss << "filesystem '" << fs_name << "' already exists"; | |
139 | return 0; | |
140 | } else { | |
141 | ss << "filesystem already exists with name '" << fs_name << "'"; | |
142 | return -EINVAL; | |
143 | } | |
144 | } | |
145 | ||
146 | if (fsmap.filesystem_count() > 0 | |
147 | && !fsmap.get_enable_multiple()) { | |
148 | ss << "Creation of multiple filesystems is disabled. To enable " | |
149 | "this experimental feature, use 'ceph fs flag set enable_multiple " | |
150 | "true'"; | |
151 | return -EINVAL; | |
152 | } | |
153 | ||
154 | for (auto fs : fsmap.get_filesystems()) { | |
155 | const set<int64_t>& data_pools = fs->mds_map.get_data_pools(); | |
156 | string sure; | |
157 | if ((data_pools.find(data) != data_pools.end() | |
158 | || fs->mds_map.get_metadata_pool() == metadata) | |
159 | && ((!cmd_getval(g_ceph_context, cmdmap, "sure", sure) | |
160 | || sure != "--allow-dangerous-metadata-overlay"))) { | |
161 | ss << "Filesystem '" << fs_name | |
162 | << "' is already using one of the specified RADOS pools. This should ONLY be done in emergencies and after careful reading of the documentation. Pass --allow-dangerous-metadata-overlay to permit this."; | |
163 | return -EEXIST; | |
164 | } | |
165 | } | |
166 | ||
167 | pg_pool_t const *data_pool = mon->osdmon()->osdmap.get_pg_pool(data); | |
168 | assert(data_pool != NULL); // Checked it existed above | |
169 | pg_pool_t const *metadata_pool = mon->osdmon()->osdmap.get_pg_pool(metadata); | |
170 | assert(metadata_pool != NULL); // Checked it existed above | |
171 | ||
172 | // we must make these checks before we even allow ourselves to *think* | |
173 | // about requesting a proposal to the osdmonitor and bail out now if | |
174 | // we believe we must. bailing out *after* we request the proposal is | |
175 | // bad business as we could have changed the osdmon's state and ending up | |
176 | // returning an error to the user. | |
177 | int r = _check_pool(mon->osdmon()->osdmap, data, false, &ss); | |
178 | if (r < 0) { | |
179 | return r; | |
180 | } | |
181 | ||
182 | r = _check_pool(mon->osdmon()->osdmap, metadata, true, &ss); | |
183 | if (r < 0) { | |
184 | return r; | |
185 | } | |
186 | ||
187 | // All checks passed, go ahead and create. | |
188 | fsmap.create_filesystem(fs_name, metadata, data, | |
189 | mon->get_quorum_con_features()); | |
190 | ss << "new fs with metadata pool " << metadata << " and data pool " << data; | |
191 | return 0; | |
192 | } | |
193 | }; | |
194 | ||
195 | class SetHandler : public FileSystemCommandHandler | |
196 | { | |
197 | public: | |
198 | SetHandler() | |
199 | : FileSystemCommandHandler("fs set") | |
200 | {} | |
201 | ||
202 | int handle( | |
203 | Monitor *mon, | |
204 | FSMap &fsmap, | |
205 | MonOpRequestRef op, | |
206 | map<string, cmd_vartype> &cmdmap, | |
207 | std::stringstream &ss) override | |
208 | { | |
209 | std::string fs_name; | |
210 | if (!cmd_getval(g_ceph_context, cmdmap, "fs_name", fs_name) || fs_name.empty()) { | |
211 | ss << "Missing filesystem name"; | |
212 | return -EINVAL; | |
213 | } | |
214 | ||
215 | auto fs = fsmap.get_filesystem(fs_name); | |
216 | if (fs == nullptr) { | |
217 | ss << "Not found: '" << fs_name << "'"; | |
218 | return -ENOENT; | |
219 | } | |
220 | ||
221 | string var; | |
222 | if (!cmd_getval(g_ceph_context, cmdmap, "var", var) || var.empty()) { | |
223 | ss << "Invalid variable"; | |
224 | return -EINVAL; | |
225 | } | |
226 | string val; | |
227 | string interr; | |
228 | int64_t n = 0; | |
229 | if (!cmd_getval(g_ceph_context, cmdmap, "val", val)) { | |
230 | return -EINVAL; | |
231 | } | |
232 | // we got a string. see if it contains an int. | |
233 | n = strict_strtoll(val.c_str(), 10, &interr); | |
234 | if (var == "max_mds") { | |
235 | // NOTE: see also "mds set_max_mds", which can modify the same field. | |
236 | if (interr.length()) { | |
237 | ss << interr; | |
238 | return -EINVAL; | |
239 | } | |
240 | ||
241 | if (n <= 0) { | |
242 | ss << "You must specify at least one MDS"; | |
243 | return -EINVAL; | |
244 | } | |
245 | ||
246 | if (!fs->mds_map.allows_multimds() && n > fs->mds_map.get_max_mds() && | |
247 | n > 1) { | |
248 | ss << "multi-MDS clusters are not enabled; set 'allow_multimds' to enable"; | |
249 | return -EINVAL; | |
250 | } | |
251 | if (n > MAX_MDS) { | |
252 | ss << "may not have more than " << MAX_MDS << " MDS ranks"; | |
253 | return -EINVAL; | |
254 | } | |
255 | fsmap.modify_filesystem( | |
256 | fs->fscid, | |
257 | [n](std::shared_ptr<Filesystem> fs) | |
258 | { | |
259 | fs->mds_map.set_max_mds(n); | |
260 | }); | |
261 | } else if (var == "inline_data") { | |
262 | bool enable_inline = false; | |
263 | int r = parse_bool(val, &enable_inline, ss); | |
264 | if (r != 0) { | |
265 | return r; | |
266 | } | |
267 | ||
268 | if (enable_inline) { | |
269 | string confirm; | |
270 | if (!cmd_getval(g_ceph_context, cmdmap, "confirm", confirm) || | |
271 | confirm != "--yes-i-really-mean-it") { | |
272 | ss << EXPERIMENTAL_WARNING; | |
273 | return -EPERM; | |
274 | } | |
275 | ss << "inline data enabled"; | |
276 | ||
277 | fsmap.modify_filesystem( | |
278 | fs->fscid, | |
279 | [](std::shared_ptr<Filesystem> fs) | |
280 | { | |
281 | fs->mds_map.set_inline_data_enabled(true); | |
282 | }); | |
283 | ||
284 | // Update `compat` | |
285 | CompatSet c = fsmap.get_compat(); | |
286 | c.incompat.insert(MDS_FEATURE_INCOMPAT_INLINE); | |
287 | fsmap.update_compat(c); | |
288 | } else { | |
289 | ss << "inline data disabled"; | |
290 | fsmap.modify_filesystem( | |
291 | fs->fscid, | |
292 | [](std::shared_ptr<Filesystem> fs) | |
293 | { | |
294 | fs->mds_map.set_inline_data_enabled(false); | |
295 | }); | |
296 | } | |
297 | } else if (var == "balancer") { | |
298 | ss << "setting the metadata load balancer to " << val; | |
299 | fsmap.modify_filesystem( | |
300 | fs->fscid, | |
301 | [val](std::shared_ptr<Filesystem> fs) | |
302 | { | |
303 | fs->mds_map.set_balancer(val); | |
304 | }); | |
305 | return true; | |
306 | } else if (var == "max_file_size") { | |
307 | if (interr.length()) { | |
308 | ss << var << " requires an integer value"; | |
309 | return -EINVAL; | |
310 | } | |
311 | if (n < CEPH_MIN_STRIPE_UNIT) { | |
312 | ss << var << " must at least " << CEPH_MIN_STRIPE_UNIT; | |
313 | return -ERANGE; | |
314 | } | |
315 | fsmap.modify_filesystem( | |
316 | fs->fscid, | |
317 | [n](std::shared_ptr<Filesystem> fs) | |
318 | { | |
319 | fs->mds_map.set_max_filesize(n); | |
320 | }); | |
321 | } else if (var == "allow_new_snaps") { | |
322 | bool enable_snaps = false; | |
323 | int r = parse_bool(val, &enable_snaps, ss); | |
324 | if (r != 0) { | |
325 | return r; | |
326 | } | |
327 | ||
328 | if (!enable_snaps) { | |
329 | fsmap.modify_filesystem( | |
330 | fs->fscid, | |
331 | [](std::shared_ptr<Filesystem> fs) | |
332 | { | |
333 | fs->mds_map.clear_snaps_allowed(); | |
334 | }); | |
335 | ss << "disabled new snapshots"; | |
336 | } else { | |
337 | string confirm; | |
338 | if (!cmd_getval(g_ceph_context, cmdmap, "confirm", confirm) || | |
339 | confirm != "--yes-i-really-mean-it") { | |
340 | ss << EXPERIMENTAL_WARNING; | |
341 | return -EPERM; | |
342 | } | |
343 | fsmap.modify_filesystem( | |
344 | fs->fscid, | |
345 | [](std::shared_ptr<Filesystem> fs) | |
346 | { | |
347 | fs->mds_map.set_snaps_allowed(); | |
348 | }); | |
349 | ss << "enabled new snapshots"; | |
350 | } | |
351 | } else if (var == "allow_multimds") { | |
352 | bool enable_multimds = false; | |
353 | int r = parse_bool(val, &enable_multimds, ss); | |
354 | if (r != 0) { | |
355 | return r; | |
356 | } | |
357 | ||
358 | if (!enable_multimds) { | |
359 | fsmap.modify_filesystem(fs->fscid, | |
360 | [](std::shared_ptr<Filesystem> fs) | |
361 | { | |
362 | fs->mds_map.clear_multimds_allowed(); | |
363 | }); | |
364 | ss << "disallowed increasing the cluster size past 1"; | |
365 | } else { | |
366 | string confirm; | |
367 | if (!cmd_getval(g_ceph_context, cmdmap, "confirm", confirm) || | |
368 | confirm != "--yes-i-really-mean-it") { | |
369 | ss << EXPERIMENTAL_WARNING; | |
370 | return -EPERM; | |
371 | } | |
372 | fsmap.modify_filesystem( | |
373 | fs->fscid, | |
374 | [](std::shared_ptr<Filesystem> fs) | |
375 | { | |
376 | fs->mds_map.set_multimds_allowed(); | |
377 | }); | |
378 | ss << "enabled creation of more than 1 active MDS"; | |
379 | } | |
380 | } else if (var == "allow_dirfrags") { | |
381 | bool enable_dirfrags = false; | |
382 | int r = parse_bool(val, &enable_dirfrags, ss); | |
383 | if (r != 0) { | |
384 | return r; | |
385 | } | |
386 | ||
387 | if (!enable_dirfrags) { | |
388 | fsmap.modify_filesystem(fs->fscid, | |
389 | [](std::shared_ptr<Filesystem> fs) | |
390 | { | |
391 | fs->mds_map.clear_dirfrags_allowed(); | |
392 | }); | |
393 | ss << "disallowed new directory fragmentation"; | |
394 | } else { | |
395 | fsmap.modify_filesystem( | |
396 | fs->fscid, | |
397 | [](std::shared_ptr<Filesystem> fs) | |
398 | { | |
399 | fs->mds_map.set_dirfrags_allowed(); | |
400 | }); | |
401 | ss << "enabled directory fragmentation"; | |
402 | } | |
403 | } else if (var == "cluster_down") { | |
404 | bool is_down = false; | |
405 | int r = parse_bool(val, &is_down, ss); | |
406 | if (r != 0) { | |
407 | return r; | |
408 | } | |
409 | ||
410 | fsmap.modify_filesystem( | |
411 | fs->fscid, | |
412 | [is_down](std::shared_ptr<Filesystem> fs) | |
413 | { | |
414 | if (is_down) { | |
415 | fs->mds_map.set_flag(CEPH_MDSMAP_DOWN); | |
416 | } else { | |
417 | fs->mds_map.clear_flag(CEPH_MDSMAP_DOWN); | |
418 | } | |
419 | }); | |
420 | ||
421 | ss << "marked " << (is_down ? "down" : "up"); | |
422 | } else if (var == "standby_count_wanted") { | |
423 | if (interr.length()) { | |
424 | ss << var << " requires an integer value"; | |
425 | return -EINVAL; | |
426 | } | |
427 | if (n < 0) { | |
428 | ss << var << " must be non-negative"; | |
429 | return -ERANGE; | |
430 | } | |
431 | fsmap.modify_filesystem( | |
432 | fs->fscid, | |
433 | [n](std::shared_ptr<Filesystem> fs) | |
434 | { | |
435 | fs->mds_map.set_standby_count_wanted(n); | |
436 | }); | |
437 | } else { | |
438 | ss << "unknown variable " << var; | |
439 | return -EINVAL; | |
440 | } | |
441 | ||
442 | return 0; | |
443 | } | |
444 | }; | |
445 | ||
446 | class AddDataPoolHandler : public FileSystemCommandHandler | |
447 | { | |
448 | public: | |
449 | AddDataPoolHandler() | |
450 | : FileSystemCommandHandler("fs add_data_pool") | |
451 | {} | |
452 | ||
453 | int handle( | |
454 | Monitor *mon, | |
455 | FSMap &fsmap, | |
456 | MonOpRequestRef op, | |
457 | map<string, cmd_vartype> &cmdmap, | |
458 | std::stringstream &ss) override | |
459 | { | |
460 | string poolname; | |
461 | cmd_getval(g_ceph_context, cmdmap, "pool", poolname); | |
462 | ||
463 | std::string fs_name; | |
464 | if (!cmd_getval(g_ceph_context, cmdmap, "fs_name", fs_name) | |
465 | || fs_name.empty()) { | |
466 | ss << "Missing filesystem name"; | |
467 | return -EINVAL; | |
468 | } | |
469 | ||
470 | auto fs = fsmap.get_filesystem(fs_name); | |
471 | if (fs == nullptr) { | |
472 | ss << "Not found: '" << fs_name << "'"; | |
473 | return -ENOENT; | |
474 | } | |
475 | ||
476 | int64_t poolid = mon->osdmon()->osdmap.lookup_pg_pool_name(poolname); | |
477 | if (poolid < 0) { | |
478 | string err; | |
479 | poolid = strict_strtol(poolname.c_str(), 10, &err); | |
480 | if (err.length()) { | |
481 | ss << "pool '" << poolname << "' does not exist"; | |
482 | return -ENOENT; | |
483 | } | |
484 | } | |
485 | ||
486 | int r = _check_pool(mon->osdmon()->osdmap, poolid, false, &ss); | |
487 | if (r != 0) { | |
488 | return r; | |
489 | } | |
490 | ||
491 | fsmap.modify_filesystem( | |
492 | fs->fscid, | |
493 | [poolid](std::shared_ptr<Filesystem> fs) | |
494 | { | |
495 | fs->mds_map.add_data_pool(poolid); | |
496 | }); | |
497 | ||
498 | ss << "added data pool " << poolid << " to fsmap"; | |
499 | ||
500 | return 0; | |
501 | } | |
502 | }; | |
503 | ||
504 | class SetDefaultHandler : public FileSystemCommandHandler | |
505 | { | |
506 | public: | |
507 | SetDefaultHandler() | |
508 | : FileSystemCommandHandler("fs set-default") | |
509 | {} | |
510 | ||
511 | int handle( | |
512 | Monitor *mon, | |
513 | FSMap &fsmap, | |
514 | MonOpRequestRef op, | |
515 | map<string, cmd_vartype> &cmdmap, | |
516 | std::stringstream &ss) override | |
517 | { | |
518 | std::string fs_name; | |
519 | cmd_getval(g_ceph_context, cmdmap, "fs_name", fs_name); | |
520 | auto fs = fsmap.get_filesystem(fs_name); | |
521 | if (fs == nullptr) { | |
522 | ss << "filesystem '" << fs_name << "' does not exist"; | |
523 | return -ENOENT; | |
524 | } | |
525 | ||
526 | fsmap.set_legacy_client_fscid(fs->fscid); | |
527 | return 0; | |
528 | } | |
529 | }; | |
530 | ||
531 | class RemoveFilesystemHandler : public FileSystemCommandHandler | |
532 | { | |
533 | public: | |
534 | RemoveFilesystemHandler() | |
535 | : FileSystemCommandHandler("fs rm") | |
536 | {} | |
537 | ||
538 | int handle( | |
539 | Monitor *mon, | |
540 | FSMap &fsmap, | |
541 | MonOpRequestRef op, | |
542 | map<string, cmd_vartype> &cmdmap, | |
543 | std::stringstream &ss) override | |
544 | { | |
545 | // Check caller has correctly named the FS to delete | |
546 | // (redundant while there is only one FS, but command | |
547 | // syntax should apply to multi-FS future) | |
548 | string fs_name; | |
549 | cmd_getval(g_ceph_context, cmdmap, "fs_name", fs_name); | |
550 | auto fs = fsmap.get_filesystem(fs_name); | |
551 | if (fs == nullptr) { | |
552 | // Consider absence success to make deletes idempotent | |
553 | ss << "filesystem '" << fs_name << "' does not exist"; | |
554 | return 0; | |
555 | } | |
556 | ||
557 | // Check that no MDS daemons are active | |
558 | if (fs->mds_map.get_num_up_mds() > 0) { | |
559 | ss << "all MDS daemons must be inactive before removing filesystem"; | |
560 | return -EINVAL; | |
561 | } | |
562 | ||
563 | // Check for confirmation flag | |
564 | string sure; | |
565 | cmd_getval(g_ceph_context, cmdmap, "sure", sure); | |
566 | if (sure != "--yes-i-really-mean-it") { | |
567 | ss << "this is a DESTRUCTIVE operation and will make data in your filesystem permanently" \ | |
568 | " inaccessible. Add --yes-i-really-mean-it if you are sure you wish to continue."; | |
569 | return -EPERM; | |
570 | } | |
571 | ||
572 | if (fsmap.get_legacy_client_fscid() == fs->fscid) { | |
573 | fsmap.set_legacy_client_fscid(FS_CLUSTER_ID_NONE); | |
574 | } | |
575 | ||
576 | std::vector<mds_gid_t> to_fail; | |
577 | // There may be standby_replay daemons left here | |
578 | for (const auto &i : fs->mds_map.get_mds_info()) { | |
579 | assert(i.second.state == MDSMap::STATE_STANDBY_REPLAY); | |
580 | to_fail.push_back(i.first); | |
581 | } | |
582 | ||
583 | for (const auto &gid : to_fail) { | |
584 | // Standby replays don't write, so it isn't important to | |
585 | // wait for an osdmap propose here: ignore return value. | |
586 | mon->mdsmon()->fail_mds_gid(gid); | |
587 | } | |
588 | ||
589 | fsmap.erase_filesystem(fs->fscid); | |
590 | ||
591 | return 0; | |
592 | } | |
593 | }; | |
594 | ||
595 | class ResetFilesystemHandler : public FileSystemCommandHandler | |
596 | { | |
597 | public: | |
598 | ResetFilesystemHandler() | |
599 | : FileSystemCommandHandler("fs reset") | |
600 | {} | |
601 | ||
602 | int handle( | |
603 | Monitor *mon, | |
604 | FSMap &fsmap, | |
605 | MonOpRequestRef op, | |
606 | map<string, cmd_vartype> &cmdmap, | |
607 | std::stringstream &ss) override | |
608 | { | |
609 | string fs_name; | |
610 | cmd_getval(g_ceph_context, cmdmap, "fs_name", fs_name); | |
611 | auto fs = fsmap.get_filesystem(fs_name); | |
612 | if (fs == nullptr) { | |
613 | ss << "filesystem '" << fs_name << "' does not exist"; | |
614 | // Unlike fs rm, we consider this case an error | |
615 | return -ENOENT; | |
616 | } | |
617 | ||
618 | // Check that no MDS daemons are active | |
619 | if (fs->mds_map.get_num_up_mds() > 0) { | |
620 | ss << "all MDS daemons must be inactive before resetting filesystem: set the cluster_down flag" | |
621 | " and use `ceph mds fail` to make this so"; | |
622 | return -EINVAL; | |
623 | } | |
624 | ||
625 | // Check for confirmation flag | |
626 | string sure; | |
627 | cmd_getval(g_ceph_context, cmdmap, "sure", sure); | |
628 | if (sure != "--yes-i-really-mean-it") { | |
629 | ss << "this is a potentially destructive operation, only for use by experts in disaster recovery. " | |
630 | "Add --yes-i-really-mean-it if you are sure you wish to continue."; | |
631 | return -EPERM; | |
632 | } | |
633 | ||
634 | fsmap.reset_filesystem(fs->fscid); | |
635 | ||
636 | return 0; | |
637 | } | |
638 | }; | |
639 | ||
640 | class RemoveDataPoolHandler : public FileSystemCommandHandler | |
641 | { | |
642 | public: | |
643 | RemoveDataPoolHandler() | |
644 | : FileSystemCommandHandler("fs rm_data_pool") | |
645 | {} | |
646 | ||
647 | int handle( | |
648 | Monitor *mon, | |
649 | FSMap &fsmap, | |
650 | MonOpRequestRef op, | |
651 | map<string, cmd_vartype> &cmdmap, | |
652 | std::stringstream &ss) override | |
653 | { | |
654 | string poolname; | |
655 | cmd_getval(g_ceph_context, cmdmap, "pool", poolname); | |
656 | ||
657 | std::string fs_name; | |
658 | if (!cmd_getval(g_ceph_context, cmdmap, "fs_name", fs_name) | |
659 | || fs_name.empty()) { | |
660 | ss << "Missing filesystem name"; | |
661 | return -EINVAL; | |
662 | } | |
663 | ||
664 | auto fs = fsmap.get_filesystem(fs_name); | |
665 | if (fs == nullptr) { | |
666 | ss << "Not found: '" << fs_name << "'"; | |
667 | return -ENOENT; | |
668 | } | |
669 | ||
670 | int64_t poolid = mon->osdmon()->osdmap.lookup_pg_pool_name(poolname); | |
671 | if (poolid < 0) { | |
672 | string err; | |
673 | poolid = strict_strtol(poolname.c_str(), 10, &err); | |
674 | if (err.length()) { | |
675 | ss << "pool '" << poolname << "' does not exist"; | |
676 | return -ENOENT; | |
677 | } else if (poolid < 0) { | |
678 | ss << "invalid pool id '" << poolid << "'"; | |
679 | return -EINVAL; | |
680 | } | |
681 | } | |
682 | ||
683 | assert(poolid >= 0); // Checked by parsing code above | |
684 | ||
685 | if (fs->mds_map.get_first_data_pool() == poolid) { | |
686 | ss << "cannot remove default data pool"; | |
687 | return -EINVAL; | |
688 | } | |
689 | ||
690 | ||
691 | int r = 0; | |
692 | fsmap.modify_filesystem(fs->fscid, | |
693 | [&r, poolid](std::shared_ptr<Filesystem> fs) | |
694 | { | |
695 | r = fs->mds_map.remove_data_pool(poolid); | |
696 | }); | |
697 | if (r == -ENOENT) { | |
698 | // It was already removed, succeed in silence | |
699 | return 0; | |
700 | } else if (r == 0) { | |
701 | // We removed it, succeed | |
702 | ss << "removed data pool " << poolid << " from fsmap"; | |
703 | return 0; | |
704 | } else { | |
705 | // Unexpected error, bubble up | |
706 | return r; | |
707 | } | |
708 | } | |
709 | }; | |
710 | ||
711 | ||
712 | /** | |
713 | * For commands that refer to a particular filesystem, | |
714 | * enable wrapping to implement the legacy version of | |
715 | * the command (like "mds add_data_pool" vs "fs add_data_pool") | |
716 | * | |
717 | * The wrapped handler must expect a fs_name argument in | |
718 | * its command map. | |
719 | */ | |
720 | template<typename T> | |
721 | class LegacyHandler : public T | |
722 | { | |
723 | std::string legacy_prefix; | |
724 | ||
725 | public: | |
726 | LegacyHandler(const std::string &new_prefix) | |
727 | : T() | |
728 | { | |
729 | legacy_prefix = new_prefix; | |
730 | } | |
731 | ||
732 | std::string const &get_prefix() override {return legacy_prefix;} | |
733 | ||
734 | int handle( | |
735 | Monitor *mon, | |
736 | FSMap &fsmap, | |
737 | MonOpRequestRef op, | |
738 | map<string, cmd_vartype> &cmdmap, | |
739 | std::stringstream &ss) override | |
740 | { | |
741 | auto fs = fsmap.get_legacy_filesystem(); | |
742 | if (fs == nullptr) { | |
743 | ss << "No filesystem configured"; | |
744 | return -ENOENT; | |
745 | } | |
746 | std::map<string, cmd_vartype> modified = cmdmap; | |
747 | modified["fs_name"] = fs->mds_map.get_fs_name(); | |
748 | return T::handle(mon, fsmap, op, modified, ss); | |
749 | } | |
750 | }; | |
751 | ||
752 | /** | |
753 | * For commands with an alternative prefix | |
754 | */ | |
755 | template<typename T> | |
756 | class AliasHandler : public T | |
757 | { | |
758 | std::string alias_prefix; | |
759 | ||
760 | public: | |
761 | AliasHandler(const std::string &new_prefix) | |
762 | : T() | |
763 | { | |
764 | alias_prefix = new_prefix; | |
765 | } | |
766 | ||
767 | std::string const &get_prefix() override {return alias_prefix;} | |
768 | ||
769 | int handle( | |
770 | Monitor *mon, | |
771 | FSMap &fsmap, | |
772 | MonOpRequestRef op, | |
773 | map<string, cmd_vartype> &cmdmap, | |
774 | std::stringstream &ss) override | |
775 | { | |
776 | return T::handle(mon, fsmap, op, cmdmap, ss); | |
777 | } | |
778 | }; | |
779 | ||
780 | ||
781 | std::list<std::shared_ptr<FileSystemCommandHandler> > FileSystemCommandHandler::load() | |
782 | { | |
783 | std::list<std::shared_ptr<FileSystemCommandHandler> > handlers; | |
784 | ||
785 | handlers.push_back(std::make_shared<SetHandler>()); | |
786 | handlers.push_back(std::make_shared<LegacyHandler<SetHandler> >("mds set")); | |
787 | handlers.push_back(std::make_shared<FlagSetHandler>()); | |
788 | handlers.push_back(std::make_shared<AddDataPoolHandler>()); | |
789 | handlers.push_back(std::make_shared<LegacyHandler<AddDataPoolHandler> >( | |
790 | "mds add_data_pool")); | |
791 | handlers.push_back(std::make_shared<RemoveDataPoolHandler>()); | |
792 | handlers.push_back(std::make_shared<LegacyHandler<RemoveDataPoolHandler> >( | |
793 | "mds remove_data_pool")); | |
794 | handlers.push_back(std::make_shared<LegacyHandler<RemoveDataPoolHandler> >( | |
795 | "mds rm_data_pool")); | |
796 | handlers.push_back(std::make_shared<FsNewHandler>()); | |
797 | handlers.push_back(std::make_shared<RemoveFilesystemHandler>()); | |
798 | handlers.push_back(std::make_shared<ResetFilesystemHandler>()); | |
799 | ||
800 | handlers.push_back(std::make_shared<SetDefaultHandler>()); | |
801 | handlers.push_back(std::make_shared<AliasHandler<SetDefaultHandler> >( | |
802 | "fs set_default")); | |
803 | ||
804 | return handlers; | |
805 | } | |
806 | ||
807 | int FileSystemCommandHandler::parse_bool( | |
808 | const std::string &bool_str, | |
809 | bool *result, | |
810 | std::ostream &ss) | |
811 | { | |
812 | assert(result != nullptr); | |
813 | ||
814 | string interr; | |
815 | int64_t n = strict_strtoll(bool_str.c_str(), 10, &interr); | |
816 | ||
817 | if (bool_str == "false" || bool_str == "no" | |
818 | || (interr.length() == 0 && n == 0)) { | |
819 | *result = false; | |
820 | return 0; | |
821 | } else if (bool_str == "true" || bool_str == "yes" | |
822 | || (interr.length() == 0 && n == 1)) { | |
823 | *result = true; | |
824 | return 0; | |
825 | } else { | |
826 | ss << "value must be false|no|0 or true|yes|1"; | |
827 | return -EINVAL; | |
828 | } | |
829 | } | |
830 | ||
831 | int FileSystemCommandHandler::_check_pool( | |
832 | OSDMap &osd_map, | |
833 | const int64_t pool_id, | |
834 | bool metadata, | |
835 | std::stringstream *ss) const | |
836 | { | |
837 | assert(ss != NULL); | |
838 | ||
839 | const pg_pool_t *pool = osd_map.get_pg_pool(pool_id); | |
840 | if (!pool) { | |
841 | *ss << "pool id '" << pool_id << "' does not exist"; | |
842 | return -ENOENT; | |
843 | } | |
844 | ||
845 | const string& pool_name = osd_map.get_pool_name(pool_id); | |
846 | ||
847 | if (pool->is_erasure() && metadata) { | |
848 | *ss << "pool '" << pool_name << "' (id '" << pool_id << "')" | |
849 | << " is an erasure-coded pool. Use of erasure-coded pools" | |
850 | << " for CephFS metadata is not permitted"; | |
851 | return -EINVAL; | |
852 | } else if (pool->is_erasure() && !pool->allows_ecoverwrites()) { | |
853 | // non-overwriteable EC pools are only acceptable with a cache tier overlay | |
854 | if (!pool->has_tiers() || !pool->has_read_tier() || !pool->has_write_tier()) { | |
855 | *ss << "pool '" << pool_name << "' (id '" << pool_id << "')" | |
856 | << " is an erasure-coded pool, with no overwrite support"; | |
857 | return -EINVAL; | |
858 | } | |
859 | ||
860 | // That cache tier overlay must be writeback, not readonly (it's the | |
861 | // write operations like modify+truncate we care about support for) | |
862 | const pg_pool_t *write_tier = osd_map.get_pg_pool( | |
863 | pool->write_tier); | |
864 | assert(write_tier != NULL); // OSDMonitor shouldn't allow DNE tier | |
865 | if (write_tier->cache_mode == pg_pool_t::CACHEMODE_FORWARD | |
866 | || write_tier->cache_mode == pg_pool_t::CACHEMODE_READONLY) { | |
867 | *ss << "EC pool '" << pool_name << "' has a write tier (" | |
868 | << osd_map.get_pool_name(pool->write_tier) | |
869 | << ") that is configured " | |
870 | "to forward writes. Use a cache mode such as 'writeback' for " | |
871 | "CephFS"; | |
872 | return -EINVAL; | |
873 | } | |
874 | } | |
875 | ||
876 | if (pool->is_tier()) { | |
877 | *ss << " pool '" << pool_name << "' (id '" << pool_id | |
878 | << "') is already in use as a cache tier."; | |
879 | return -EINVAL; | |
880 | } | |
881 | ||
882 | // Nothing special about this pool, so it is permissible | |
883 | return 0; | |
884 | } | |
885 |