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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, | |
31f18b77 | 93 | std::stringstream &ss) override |
7c673cae FG |
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); | |
31f18b77 FG |
105 | const pool_stat_t *stat = mon->pgservice->get_pool_stat(metadata); |
106 | if (stat) { | |
107 | int64_t metadata_num_objects = stat->stats.sum.num_objects; | |
108 | if (force != "--force" && metadata_num_objects > 0) { | |
109 | ss << "pool '" << metadata_name | |
110 | << "' already contains some objects. Use an empty pool instead."; | |
111 | return -EINVAL; | |
112 | } | |
7c673cae FG |
113 | } |
114 | ||
115 | string data_name; | |
116 | cmd_getval(g_ceph_context, cmdmap, "data", data_name); | |
117 | int64_t data = mon->osdmon()->osdmap.lookup_pg_pool_name(data_name); | |
118 | if (data < 0) { | |
119 | ss << "pool '" << data_name << "' does not exist"; | |
120 | return -ENOENT; | |
121 | } | |
122 | if (data == 0) { | |
123 | 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."; | |
124 | return -EINVAL; | |
125 | } | |
126 | ||
127 | string fs_name; | |
128 | cmd_getval(g_ceph_context, cmdmap, "fs_name", fs_name); | |
129 | if (fs_name.empty()) { | |
130 | // Ensure fs name is not empty so that we can implement | |
131 | // commmands that refer to FS by name in future. | |
132 | ss << "Filesystem name may not be empty"; | |
133 | return -EINVAL; | |
134 | } | |
135 | ||
136 | if (fsmap.get_filesystem(fs_name)) { | |
137 | auto fs = fsmap.get_filesystem(fs_name); | |
138 | if (*(fs->mds_map.get_data_pools().begin()) == data | |
139 | && fs->mds_map.get_metadata_pool() == metadata) { | |
140 | // Identical FS created already, this is a no-op | |
141 | ss << "filesystem '" << fs_name << "' already exists"; | |
142 | return 0; | |
143 | } else { | |
144 | ss << "filesystem already exists with name '" << fs_name << "'"; | |
145 | return -EINVAL; | |
146 | } | |
147 | } | |
148 | ||
149 | if (fsmap.filesystem_count() > 0 | |
150 | && !fsmap.get_enable_multiple()) { | |
151 | ss << "Creation of multiple filesystems is disabled. To enable " | |
152 | "this experimental feature, use 'ceph fs flag set enable_multiple " | |
153 | "true'"; | |
154 | return -EINVAL; | |
155 | } | |
156 | ||
157 | for (auto fs : fsmap.get_filesystems()) { | |
31f18b77 | 158 | const std::vector<int64_t> &data_pools = fs->mds_map.get_data_pools(); |
7c673cae | 159 | string sure; |
31f18b77 | 160 | if ((std::find(data_pools.begin(), data_pools.end(), data) != data_pools.end() |
7c673cae FG |
161 | || fs->mds_map.get_metadata_pool() == metadata) |
162 | && ((!cmd_getval(g_ceph_context, cmdmap, "sure", sure) | |
163 | || sure != "--allow-dangerous-metadata-overlay"))) { | |
164 | ss << "Filesystem '" << fs_name | |
165 | << "' 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."; | |
166 | return -EEXIST; | |
167 | } | |
168 | } | |
169 | ||
170 | pg_pool_t const *data_pool = mon->osdmon()->osdmap.get_pg_pool(data); | |
171 | assert(data_pool != NULL); // Checked it existed above | |
172 | pg_pool_t const *metadata_pool = mon->osdmon()->osdmap.get_pg_pool(metadata); | |
173 | assert(metadata_pool != NULL); // Checked it existed above | |
174 | ||
175 | // we must make these checks before we even allow ourselves to *think* | |
176 | // about requesting a proposal to the osdmonitor and bail out now if | |
177 | // we believe we must. bailing out *after* we request the proposal is | |
178 | // bad business as we could have changed the osdmon's state and ending up | |
179 | // returning an error to the user. | |
180 | int r = _check_pool(mon->osdmon()->osdmap, data, false, &ss); | |
181 | if (r < 0) { | |
182 | return r; | |
183 | } | |
184 | ||
185 | r = _check_pool(mon->osdmon()->osdmap, metadata, true, &ss); | |
186 | if (r < 0) { | |
187 | return r; | |
188 | } | |
189 | ||
190 | // All checks passed, go ahead and create. | |
191 | fsmap.create_filesystem(fs_name, metadata, data, | |
192 | mon->get_quorum_con_features()); | |
193 | ss << "new fs with metadata pool " << metadata << " and data pool " << data; | |
194 | return 0; | |
195 | } | |
196 | }; | |
197 | ||
198 | class SetHandler : public FileSystemCommandHandler | |
199 | { | |
200 | public: | |
201 | SetHandler() | |
202 | : FileSystemCommandHandler("fs set") | |
203 | {} | |
204 | ||
205 | int handle( | |
206 | Monitor *mon, | |
207 | FSMap &fsmap, | |
208 | MonOpRequestRef op, | |
209 | map<string, cmd_vartype> &cmdmap, | |
210 | std::stringstream &ss) override | |
211 | { | |
212 | std::string fs_name; | |
213 | if (!cmd_getval(g_ceph_context, cmdmap, "fs_name", fs_name) || fs_name.empty()) { | |
214 | ss << "Missing filesystem name"; | |
215 | return -EINVAL; | |
216 | } | |
217 | ||
218 | auto fs = fsmap.get_filesystem(fs_name); | |
219 | if (fs == nullptr) { | |
220 | ss << "Not found: '" << fs_name << "'"; | |
221 | return -ENOENT; | |
222 | } | |
223 | ||
224 | string var; | |
225 | if (!cmd_getval(g_ceph_context, cmdmap, "var", var) || var.empty()) { | |
226 | ss << "Invalid variable"; | |
227 | return -EINVAL; | |
228 | } | |
229 | string val; | |
230 | string interr; | |
231 | int64_t n = 0; | |
232 | if (!cmd_getval(g_ceph_context, cmdmap, "val", val)) { | |
233 | return -EINVAL; | |
234 | } | |
235 | // we got a string. see if it contains an int. | |
236 | n = strict_strtoll(val.c_str(), 10, &interr); | |
237 | if (var == "max_mds") { | |
238 | // NOTE: see also "mds set_max_mds", which can modify the same field. | |
239 | if (interr.length()) { | |
240 | ss << interr; | |
241 | return -EINVAL; | |
242 | } | |
243 | ||
244 | if (n <= 0) { | |
245 | ss << "You must specify at least one MDS"; | |
246 | return -EINVAL; | |
247 | } | |
248 | ||
249 | if (!fs->mds_map.allows_multimds() && n > fs->mds_map.get_max_mds() && | |
250 | n > 1) { | |
251 | ss << "multi-MDS clusters are not enabled; set 'allow_multimds' to enable"; | |
252 | return -EINVAL; | |
253 | } | |
254 | if (n > MAX_MDS) { | |
255 | ss << "may not have more than " << MAX_MDS << " MDS ranks"; | |
256 | return -EINVAL; | |
257 | } | |
258 | fsmap.modify_filesystem( | |
259 | fs->fscid, | |
260 | [n](std::shared_ptr<Filesystem> fs) | |
261 | { | |
262 | fs->mds_map.set_max_mds(n); | |
263 | }); | |
264 | } else if (var == "inline_data") { | |
265 | bool enable_inline = false; | |
266 | int r = parse_bool(val, &enable_inline, ss); | |
267 | if (r != 0) { | |
268 | return r; | |
269 | } | |
270 | ||
271 | if (enable_inline) { | |
272 | string confirm; | |
273 | if (!cmd_getval(g_ceph_context, cmdmap, "confirm", confirm) || | |
274 | confirm != "--yes-i-really-mean-it") { | |
275 | ss << EXPERIMENTAL_WARNING; | |
276 | return -EPERM; | |
277 | } | |
278 | ss << "inline data enabled"; | |
279 | ||
280 | fsmap.modify_filesystem( | |
281 | fs->fscid, | |
282 | [](std::shared_ptr<Filesystem> fs) | |
283 | { | |
284 | fs->mds_map.set_inline_data_enabled(true); | |
285 | }); | |
286 | ||
287 | // Update `compat` | |
288 | CompatSet c = fsmap.get_compat(); | |
289 | c.incompat.insert(MDS_FEATURE_INCOMPAT_INLINE); | |
290 | fsmap.update_compat(c); | |
291 | } else { | |
292 | ss << "inline data disabled"; | |
293 | fsmap.modify_filesystem( | |
294 | fs->fscid, | |
295 | [](std::shared_ptr<Filesystem> fs) | |
296 | { | |
297 | fs->mds_map.set_inline_data_enabled(false); | |
298 | }); | |
299 | } | |
300 | } else if (var == "balancer") { | |
31f18b77 FG |
301 | if (val.empty()) { |
302 | ss << "unsetting the metadata load balancer"; | |
303 | } else { | |
304 | ss << "setting the metadata load balancer to " << val; | |
305 | } | |
306 | fsmap.modify_filesystem( | |
307 | fs->fscid, | |
308 | [val](std::shared_ptr<Filesystem> fs) | |
7c673cae FG |
309 | { |
310 | fs->mds_map.set_balancer(val); | |
311 | }); | |
312 | return true; | |
313 | } else if (var == "max_file_size") { | |
314 | if (interr.length()) { | |
315 | ss << var << " requires an integer value"; | |
316 | return -EINVAL; | |
317 | } | |
318 | if (n < CEPH_MIN_STRIPE_UNIT) { | |
319 | ss << var << " must at least " << CEPH_MIN_STRIPE_UNIT; | |
320 | return -ERANGE; | |
321 | } | |
322 | fsmap.modify_filesystem( | |
323 | fs->fscid, | |
324 | [n](std::shared_ptr<Filesystem> fs) | |
325 | { | |
326 | fs->mds_map.set_max_filesize(n); | |
327 | }); | |
328 | } else if (var == "allow_new_snaps") { | |
329 | bool enable_snaps = false; | |
330 | int r = parse_bool(val, &enable_snaps, ss); | |
331 | if (r != 0) { | |
332 | return r; | |
333 | } | |
334 | ||
335 | if (!enable_snaps) { | |
336 | fsmap.modify_filesystem( | |
337 | fs->fscid, | |
338 | [](std::shared_ptr<Filesystem> fs) | |
339 | { | |
340 | fs->mds_map.clear_snaps_allowed(); | |
341 | }); | |
342 | ss << "disabled new snapshots"; | |
343 | } else { | |
344 | string confirm; | |
345 | if (!cmd_getval(g_ceph_context, cmdmap, "confirm", confirm) || | |
346 | confirm != "--yes-i-really-mean-it") { | |
347 | ss << EXPERIMENTAL_WARNING; | |
348 | return -EPERM; | |
349 | } | |
350 | fsmap.modify_filesystem( | |
351 | fs->fscid, | |
352 | [](std::shared_ptr<Filesystem> fs) | |
353 | { | |
354 | fs->mds_map.set_snaps_allowed(); | |
355 | }); | |
356 | ss << "enabled new snapshots"; | |
357 | } | |
358 | } else if (var == "allow_multimds") { | |
359 | bool enable_multimds = false; | |
360 | int r = parse_bool(val, &enable_multimds, ss); | |
361 | if (r != 0) { | |
362 | return r; | |
363 | } | |
364 | ||
365 | if (!enable_multimds) { | |
366 | fsmap.modify_filesystem(fs->fscid, | |
367 | [](std::shared_ptr<Filesystem> fs) | |
368 | { | |
369 | fs->mds_map.clear_multimds_allowed(); | |
370 | }); | |
371 | ss << "disallowed increasing the cluster size past 1"; | |
372 | } else { | |
7c673cae FG |
373 | fsmap.modify_filesystem( |
374 | fs->fscid, | |
375 | [](std::shared_ptr<Filesystem> fs) | |
376 | { | |
377 | fs->mds_map.set_multimds_allowed(); | |
378 | }); | |
379 | ss << "enabled creation of more than 1 active MDS"; | |
380 | } | |
381 | } else if (var == "allow_dirfrags") { | |
382 | bool enable_dirfrags = false; | |
383 | int r = parse_bool(val, &enable_dirfrags, ss); | |
384 | if (r != 0) { | |
385 | return r; | |
386 | } | |
387 | ||
388 | if (!enable_dirfrags) { | |
389 | fsmap.modify_filesystem(fs->fscid, | |
390 | [](std::shared_ptr<Filesystem> fs) | |
391 | { | |
392 | fs->mds_map.clear_dirfrags_allowed(); | |
393 | }); | |
394 | ss << "disallowed new directory fragmentation"; | |
395 | } else { | |
396 | fsmap.modify_filesystem( | |
397 | fs->fscid, | |
398 | [](std::shared_ptr<Filesystem> fs) | |
399 | { | |
400 | fs->mds_map.set_dirfrags_allowed(); | |
401 | }); | |
402 | ss << "enabled directory fragmentation"; | |
403 | } | |
404 | } else if (var == "cluster_down") { | |
405 | bool is_down = false; | |
406 | int r = parse_bool(val, &is_down, ss); | |
407 | if (r != 0) { | |
408 | return r; | |
409 | } | |
410 | ||
411 | fsmap.modify_filesystem( | |
412 | fs->fscid, | |
413 | [is_down](std::shared_ptr<Filesystem> fs) | |
414 | { | |
415 | if (is_down) { | |
416 | fs->mds_map.set_flag(CEPH_MDSMAP_DOWN); | |
417 | } else { | |
418 | fs->mds_map.clear_flag(CEPH_MDSMAP_DOWN); | |
419 | } | |
420 | }); | |
421 | ||
422 | ss << "marked " << (is_down ? "down" : "up"); | |
423 | } else if (var == "standby_count_wanted") { | |
424 | if (interr.length()) { | |
425 | ss << var << " requires an integer value"; | |
426 | return -EINVAL; | |
427 | } | |
428 | if (n < 0) { | |
429 | ss << var << " must be non-negative"; | |
430 | return -ERANGE; | |
431 | } | |
432 | fsmap.modify_filesystem( | |
433 | fs->fscid, | |
434 | [n](std::shared_ptr<Filesystem> fs) | |
435 | { | |
436 | fs->mds_map.set_standby_count_wanted(n); | |
437 | }); | |
438 | } else { | |
439 | ss << "unknown variable " << var; | |
440 | return -EINVAL; | |
441 | } | |
442 | ||
443 | return 0; | |
444 | } | |
445 | }; | |
446 | ||
447 | class AddDataPoolHandler : public FileSystemCommandHandler | |
448 | { | |
449 | public: | |
450 | AddDataPoolHandler() | |
451 | : FileSystemCommandHandler("fs add_data_pool") | |
452 | {} | |
453 | ||
454 | int handle( | |
455 | Monitor *mon, | |
456 | FSMap &fsmap, | |
457 | MonOpRequestRef op, | |
458 | map<string, cmd_vartype> &cmdmap, | |
459 | std::stringstream &ss) override | |
460 | { | |
461 | string poolname; | |
462 | cmd_getval(g_ceph_context, cmdmap, "pool", poolname); | |
463 | ||
464 | std::string fs_name; | |
465 | if (!cmd_getval(g_ceph_context, cmdmap, "fs_name", fs_name) | |
466 | || fs_name.empty()) { | |
467 | ss << "Missing filesystem name"; | |
468 | return -EINVAL; | |
469 | } | |
470 | ||
471 | auto fs = fsmap.get_filesystem(fs_name); | |
472 | if (fs == nullptr) { | |
473 | ss << "Not found: '" << fs_name << "'"; | |
474 | return -ENOENT; | |
475 | } | |
476 | ||
477 | int64_t poolid = mon->osdmon()->osdmap.lookup_pg_pool_name(poolname); | |
478 | if (poolid < 0) { | |
479 | string err; | |
480 | poolid = strict_strtol(poolname.c_str(), 10, &err); | |
481 | if (err.length()) { | |
482 | ss << "pool '" << poolname << "' does not exist"; | |
483 | return -ENOENT; | |
484 | } | |
485 | } | |
486 | ||
487 | int r = _check_pool(mon->osdmon()->osdmap, poolid, false, &ss); | |
488 | if (r != 0) { | |
489 | return r; | |
490 | } | |
491 | ||
31f18b77 FG |
492 | // no-op when the data_pool already on fs |
493 | if (fs->mds_map.is_data_pool(poolid)) { | |
494 | ss << "data pool " << poolid << " is already on fs " << fs_name; | |
495 | return 0; | |
496 | } | |
497 | ||
7c673cae FG |
498 | fsmap.modify_filesystem( |
499 | fs->fscid, | |
500 | [poolid](std::shared_ptr<Filesystem> fs) | |
501 | { | |
502 | fs->mds_map.add_data_pool(poolid); | |
503 | }); | |
504 | ||
505 | ss << "added data pool " << poolid << " to fsmap"; | |
506 | ||
507 | return 0; | |
508 | } | |
509 | }; | |
510 | ||
511 | class SetDefaultHandler : public FileSystemCommandHandler | |
512 | { | |
513 | public: | |
514 | SetDefaultHandler() | |
515 | : FileSystemCommandHandler("fs set-default") | |
516 | {} | |
517 | ||
518 | int handle( | |
519 | Monitor *mon, | |
520 | FSMap &fsmap, | |
521 | MonOpRequestRef op, | |
522 | map<string, cmd_vartype> &cmdmap, | |
523 | std::stringstream &ss) override | |
524 | { | |
525 | std::string fs_name; | |
526 | cmd_getval(g_ceph_context, cmdmap, "fs_name", fs_name); | |
527 | auto fs = fsmap.get_filesystem(fs_name); | |
528 | if (fs == nullptr) { | |
529 | ss << "filesystem '" << fs_name << "' does not exist"; | |
530 | return -ENOENT; | |
531 | } | |
532 | ||
533 | fsmap.set_legacy_client_fscid(fs->fscid); | |
534 | return 0; | |
535 | } | |
536 | }; | |
537 | ||
538 | class RemoveFilesystemHandler : public FileSystemCommandHandler | |
539 | { | |
540 | public: | |
541 | RemoveFilesystemHandler() | |
542 | : FileSystemCommandHandler("fs rm") | |
543 | {} | |
544 | ||
545 | int handle( | |
546 | Monitor *mon, | |
547 | FSMap &fsmap, | |
548 | MonOpRequestRef op, | |
549 | map<string, cmd_vartype> &cmdmap, | |
550 | std::stringstream &ss) override | |
551 | { | |
552 | // Check caller has correctly named the FS to delete | |
553 | // (redundant while there is only one FS, but command | |
554 | // syntax should apply to multi-FS future) | |
555 | string fs_name; | |
556 | cmd_getval(g_ceph_context, cmdmap, "fs_name", fs_name); | |
557 | auto fs = fsmap.get_filesystem(fs_name); | |
558 | if (fs == nullptr) { | |
559 | // Consider absence success to make deletes idempotent | |
560 | ss << "filesystem '" << fs_name << "' does not exist"; | |
561 | return 0; | |
562 | } | |
563 | ||
564 | // Check that no MDS daemons are active | |
565 | if (fs->mds_map.get_num_up_mds() > 0) { | |
566 | ss << "all MDS daemons must be inactive before removing filesystem"; | |
567 | return -EINVAL; | |
568 | } | |
569 | ||
570 | // Check for confirmation flag | |
571 | string sure; | |
572 | cmd_getval(g_ceph_context, cmdmap, "sure", sure); | |
573 | if (sure != "--yes-i-really-mean-it") { | |
574 | ss << "this is a DESTRUCTIVE operation and will make data in your filesystem permanently" \ | |
575 | " inaccessible. Add --yes-i-really-mean-it if you are sure you wish to continue."; | |
576 | return -EPERM; | |
577 | } | |
578 | ||
579 | if (fsmap.get_legacy_client_fscid() == fs->fscid) { | |
580 | fsmap.set_legacy_client_fscid(FS_CLUSTER_ID_NONE); | |
581 | } | |
582 | ||
583 | std::vector<mds_gid_t> to_fail; | |
584 | // There may be standby_replay daemons left here | |
585 | for (const auto &i : fs->mds_map.get_mds_info()) { | |
586 | assert(i.second.state == MDSMap::STATE_STANDBY_REPLAY); | |
587 | to_fail.push_back(i.first); | |
588 | } | |
589 | ||
590 | for (const auto &gid : to_fail) { | |
591 | // Standby replays don't write, so it isn't important to | |
592 | // wait for an osdmap propose here: ignore return value. | |
593 | mon->mdsmon()->fail_mds_gid(gid); | |
594 | } | |
595 | ||
596 | fsmap.erase_filesystem(fs->fscid); | |
597 | ||
598 | return 0; | |
599 | } | |
600 | }; | |
601 | ||
602 | class ResetFilesystemHandler : public FileSystemCommandHandler | |
603 | { | |
604 | public: | |
605 | ResetFilesystemHandler() | |
606 | : FileSystemCommandHandler("fs reset") | |
607 | {} | |
608 | ||
609 | int handle( | |
610 | Monitor *mon, | |
611 | FSMap &fsmap, | |
612 | MonOpRequestRef op, | |
613 | map<string, cmd_vartype> &cmdmap, | |
614 | std::stringstream &ss) override | |
615 | { | |
616 | string fs_name; | |
617 | cmd_getval(g_ceph_context, cmdmap, "fs_name", fs_name); | |
618 | auto fs = fsmap.get_filesystem(fs_name); | |
619 | if (fs == nullptr) { | |
620 | ss << "filesystem '" << fs_name << "' does not exist"; | |
621 | // Unlike fs rm, we consider this case an error | |
622 | return -ENOENT; | |
623 | } | |
624 | ||
625 | // Check that no MDS daemons are active | |
626 | if (fs->mds_map.get_num_up_mds() > 0) { | |
627 | ss << "all MDS daemons must be inactive before resetting filesystem: set the cluster_down flag" | |
628 | " and use `ceph mds fail` to make this so"; | |
629 | return -EINVAL; | |
630 | } | |
631 | ||
632 | // Check for confirmation flag | |
633 | string sure; | |
634 | cmd_getval(g_ceph_context, cmdmap, "sure", sure); | |
635 | if (sure != "--yes-i-really-mean-it") { | |
636 | ss << "this is a potentially destructive operation, only for use by experts in disaster recovery. " | |
637 | "Add --yes-i-really-mean-it if you are sure you wish to continue."; | |
638 | return -EPERM; | |
639 | } | |
640 | ||
641 | fsmap.reset_filesystem(fs->fscid); | |
642 | ||
643 | return 0; | |
644 | } | |
645 | }; | |
646 | ||
647 | class RemoveDataPoolHandler : public FileSystemCommandHandler | |
648 | { | |
649 | public: | |
650 | RemoveDataPoolHandler() | |
651 | : FileSystemCommandHandler("fs rm_data_pool") | |
652 | {} | |
653 | ||
654 | int handle( | |
655 | Monitor *mon, | |
656 | FSMap &fsmap, | |
657 | MonOpRequestRef op, | |
658 | map<string, cmd_vartype> &cmdmap, | |
659 | std::stringstream &ss) override | |
660 | { | |
661 | string poolname; | |
662 | cmd_getval(g_ceph_context, cmdmap, "pool", poolname); | |
663 | ||
664 | std::string fs_name; | |
665 | if (!cmd_getval(g_ceph_context, cmdmap, "fs_name", fs_name) | |
666 | || fs_name.empty()) { | |
667 | ss << "Missing filesystem name"; | |
668 | return -EINVAL; | |
669 | } | |
670 | ||
671 | auto fs = fsmap.get_filesystem(fs_name); | |
672 | if (fs == nullptr) { | |
673 | ss << "Not found: '" << fs_name << "'"; | |
674 | return -ENOENT; | |
675 | } | |
676 | ||
677 | int64_t poolid = mon->osdmon()->osdmap.lookup_pg_pool_name(poolname); | |
678 | if (poolid < 0) { | |
679 | string err; | |
680 | poolid = strict_strtol(poolname.c_str(), 10, &err); | |
681 | if (err.length()) { | |
682 | ss << "pool '" << poolname << "' does not exist"; | |
683 | return -ENOENT; | |
684 | } else if (poolid < 0) { | |
685 | ss << "invalid pool id '" << poolid << "'"; | |
686 | return -EINVAL; | |
687 | } | |
688 | } | |
689 | ||
690 | assert(poolid >= 0); // Checked by parsing code above | |
691 | ||
692 | if (fs->mds_map.get_first_data_pool() == poolid) { | |
693 | ss << "cannot remove default data pool"; | |
694 | return -EINVAL; | |
695 | } | |
696 | ||
697 | ||
698 | int r = 0; | |
699 | fsmap.modify_filesystem(fs->fscid, | |
700 | [&r, poolid](std::shared_ptr<Filesystem> fs) | |
701 | { | |
702 | r = fs->mds_map.remove_data_pool(poolid); | |
703 | }); | |
704 | if (r == -ENOENT) { | |
705 | // It was already removed, succeed in silence | |
706 | return 0; | |
707 | } else if (r == 0) { | |
708 | // We removed it, succeed | |
709 | ss << "removed data pool " << poolid << " from fsmap"; | |
710 | return 0; | |
711 | } else { | |
712 | // Unexpected error, bubble up | |
713 | return r; | |
714 | } | |
715 | } | |
716 | }; | |
717 | ||
718 | ||
719 | /** | |
720 | * For commands that refer to a particular filesystem, | |
721 | * enable wrapping to implement the legacy version of | |
722 | * the command (like "mds add_data_pool" vs "fs add_data_pool") | |
723 | * | |
724 | * The wrapped handler must expect a fs_name argument in | |
725 | * its command map. | |
726 | */ | |
727 | template<typename T> | |
728 | class LegacyHandler : public T | |
729 | { | |
730 | std::string legacy_prefix; | |
731 | ||
732 | public: | |
733 | LegacyHandler(const std::string &new_prefix) | |
734 | : T() | |
735 | { | |
736 | legacy_prefix = new_prefix; | |
737 | } | |
738 | ||
739 | std::string const &get_prefix() override {return legacy_prefix;} | |
740 | ||
741 | int handle( | |
742 | Monitor *mon, | |
743 | FSMap &fsmap, | |
744 | MonOpRequestRef op, | |
745 | map<string, cmd_vartype> &cmdmap, | |
746 | std::stringstream &ss) override | |
747 | { | |
748 | auto fs = fsmap.get_legacy_filesystem(); | |
749 | if (fs == nullptr) { | |
750 | ss << "No filesystem configured"; | |
751 | return -ENOENT; | |
752 | } | |
753 | std::map<string, cmd_vartype> modified = cmdmap; | |
754 | modified["fs_name"] = fs->mds_map.get_fs_name(); | |
755 | return T::handle(mon, fsmap, op, modified, ss); | |
756 | } | |
757 | }; | |
758 | ||
759 | /** | |
760 | * For commands with an alternative prefix | |
761 | */ | |
762 | template<typename T> | |
763 | class AliasHandler : public T | |
764 | { | |
765 | std::string alias_prefix; | |
766 | ||
767 | public: | |
768 | AliasHandler(const std::string &new_prefix) | |
769 | : T() | |
770 | { | |
771 | alias_prefix = new_prefix; | |
772 | } | |
773 | ||
774 | std::string const &get_prefix() override {return alias_prefix;} | |
775 | ||
776 | int handle( | |
777 | Monitor *mon, | |
778 | FSMap &fsmap, | |
779 | MonOpRequestRef op, | |
780 | map<string, cmd_vartype> &cmdmap, | |
781 | std::stringstream &ss) override | |
782 | { | |
783 | return T::handle(mon, fsmap, op, cmdmap, ss); | |
784 | } | |
785 | }; | |
786 | ||
787 | ||
788 | std::list<std::shared_ptr<FileSystemCommandHandler> > FileSystemCommandHandler::load() | |
789 | { | |
790 | std::list<std::shared_ptr<FileSystemCommandHandler> > handlers; | |
791 | ||
792 | handlers.push_back(std::make_shared<SetHandler>()); | |
793 | handlers.push_back(std::make_shared<LegacyHandler<SetHandler> >("mds set")); | |
794 | handlers.push_back(std::make_shared<FlagSetHandler>()); | |
795 | handlers.push_back(std::make_shared<AddDataPoolHandler>()); | |
796 | handlers.push_back(std::make_shared<LegacyHandler<AddDataPoolHandler> >( | |
797 | "mds add_data_pool")); | |
798 | handlers.push_back(std::make_shared<RemoveDataPoolHandler>()); | |
799 | handlers.push_back(std::make_shared<LegacyHandler<RemoveDataPoolHandler> >( | |
800 | "mds remove_data_pool")); | |
801 | handlers.push_back(std::make_shared<LegacyHandler<RemoveDataPoolHandler> >( | |
802 | "mds rm_data_pool")); | |
803 | handlers.push_back(std::make_shared<FsNewHandler>()); | |
804 | handlers.push_back(std::make_shared<RemoveFilesystemHandler>()); | |
805 | handlers.push_back(std::make_shared<ResetFilesystemHandler>()); | |
806 | ||
807 | handlers.push_back(std::make_shared<SetDefaultHandler>()); | |
808 | handlers.push_back(std::make_shared<AliasHandler<SetDefaultHandler> >( | |
809 | "fs set_default")); | |
810 | ||
811 | return handlers; | |
812 | } | |
813 | ||
814 | int FileSystemCommandHandler::parse_bool( | |
815 | const std::string &bool_str, | |
816 | bool *result, | |
817 | std::ostream &ss) | |
818 | { | |
819 | assert(result != nullptr); | |
820 | ||
821 | string interr; | |
822 | int64_t n = strict_strtoll(bool_str.c_str(), 10, &interr); | |
823 | ||
824 | if (bool_str == "false" || bool_str == "no" | |
825 | || (interr.length() == 0 && n == 0)) { | |
826 | *result = false; | |
827 | return 0; | |
828 | } else if (bool_str == "true" || bool_str == "yes" | |
829 | || (interr.length() == 0 && n == 1)) { | |
830 | *result = true; | |
831 | return 0; | |
832 | } else { | |
833 | ss << "value must be false|no|0 or true|yes|1"; | |
834 | return -EINVAL; | |
835 | } | |
836 | } | |
837 | ||
838 | int FileSystemCommandHandler::_check_pool( | |
839 | OSDMap &osd_map, | |
840 | const int64_t pool_id, | |
841 | bool metadata, | |
842 | std::stringstream *ss) const | |
843 | { | |
844 | assert(ss != NULL); | |
845 | ||
846 | const pg_pool_t *pool = osd_map.get_pg_pool(pool_id); | |
847 | if (!pool) { | |
848 | *ss << "pool id '" << pool_id << "' does not exist"; | |
849 | return -ENOENT; | |
850 | } | |
851 | ||
852 | const string& pool_name = osd_map.get_pool_name(pool_id); | |
853 | ||
854 | if (pool->is_erasure() && metadata) { | |
855 | *ss << "pool '" << pool_name << "' (id '" << pool_id << "')" | |
856 | << " is an erasure-coded pool. Use of erasure-coded pools" | |
857 | << " for CephFS metadata is not permitted"; | |
858 | return -EINVAL; | |
859 | } else if (pool->is_erasure() && !pool->allows_ecoverwrites()) { | |
860 | // non-overwriteable EC pools are only acceptable with a cache tier overlay | |
861 | if (!pool->has_tiers() || !pool->has_read_tier() || !pool->has_write_tier()) { | |
862 | *ss << "pool '" << pool_name << "' (id '" << pool_id << "')" | |
863 | << " is an erasure-coded pool, with no overwrite support"; | |
864 | return -EINVAL; | |
865 | } | |
866 | ||
867 | // That cache tier overlay must be writeback, not readonly (it's the | |
868 | // write operations like modify+truncate we care about support for) | |
869 | const pg_pool_t *write_tier = osd_map.get_pg_pool( | |
870 | pool->write_tier); | |
871 | assert(write_tier != NULL); // OSDMonitor shouldn't allow DNE tier | |
872 | if (write_tier->cache_mode == pg_pool_t::CACHEMODE_FORWARD | |
873 | || write_tier->cache_mode == pg_pool_t::CACHEMODE_READONLY) { | |
874 | *ss << "EC pool '" << pool_name << "' has a write tier (" | |
875 | << osd_map.get_pool_name(pool->write_tier) | |
876 | << ") that is configured " | |
877 | "to forward writes. Use a cache mode such as 'writeback' for " | |
878 | "CephFS"; | |
879 | return -EINVAL; | |
880 | } | |
881 | } | |
882 | ||
883 | if (pool->is_tier()) { | |
884 | *ss << " pool '" << pool_name << "' (id '" << pool_id | |
885 | << "') is already in use as a cache tier."; | |
886 | return -EINVAL; | |
887 | } | |
888 | ||
889 | // Nothing special about this pool, so it is permissible | |
890 | return 0; | |
891 | } | |
892 |