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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) 2004-2006 Sage Weil <sage@newdream.net> | |
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 | #ifndef CEPH_FSMAP_H | |
17 | #define CEPH_FSMAP_H | |
18 | ||
94b18763 | 19 | #include <map> |
11fdf7f2 | 20 | #include <memory> |
94b18763 FG |
21 | #include <set> |
22 | #include <string> | |
11fdf7f2 | 23 | #include <string_view> |
94b18763 | 24 | |
7c673cae FG |
25 | #include <errno.h> |
26 | ||
27 | #include "include/types.h" | |
28 | #include "common/Clock.h" | |
7c673cae FG |
29 | #include "mds/MDSMap.h" |
30 | ||
7c673cae FG |
31 | #include "include/CompatSet.h" |
32 | #include "include/ceph_features.h" | |
9f95a23c | 33 | #include "include/common_fwd.h" |
7c673cae FG |
34 | #include "common/Formatter.h" |
35 | #include "mds/mdstypes.h" | |
36 | ||
224ce89b | 37 | class health_check_map_t; |
7c673cae | 38 | |
7c673cae FG |
39 | /** |
40 | * The MDSMap and any additional fields describing a particular | |
41 | * filesystem (a unique fs_cluster_id_t). | |
42 | */ | |
43 | class Filesystem | |
44 | { | |
1adf2230 | 45 | public: |
11fdf7f2 TL |
46 | using ref = std::shared_ptr<Filesystem>; |
47 | using const_ref = std::shared_ptr<Filesystem const>; | |
48 | ||
49 | template<typename... Args> | |
50 | static ref create(Args&&... args) | |
51 | { | |
52 | return std::make_shared<Filesystem>(std::forward<Args>(args)...); | |
53 | } | |
54 | ||
7c673cae | 55 | void encode(bufferlist& bl, uint64_t features) const; |
11fdf7f2 | 56 | void decode(bufferlist::const_iterator& p); |
7c673cae | 57 | |
7c673cae FG |
58 | void dump(Formatter *f) const; |
59 | void print(std::ostream& out) const; | |
60 | ||
61 | /** | |
62 | * Return true if a daemon is already assigned as | |
63 | * STANDBY_REPLAY for the gid `who` | |
64 | */ | |
65 | bool has_standby_replay(mds_gid_t who) const | |
11fdf7f2 TL |
66 | { |
67 | return get_standby_replay(who) != MDS_GID_NONE; | |
68 | } | |
9f95a23c | 69 | mds_gid_t get_standby_replay(mds_gid_t who) const; |
11fdf7f2 TL |
70 | bool is_standby_replay(mds_gid_t who) const |
71 | { | |
72 | auto p = mds_map.mds_info.find(who); | |
73 | if (p != mds_map.mds_info.end() && | |
74 | p->second.state == MDSMap::STATE_STANDBY_REPLAY) { | |
75 | return true; | |
76 | } | |
7c673cae FG |
77 | return false; |
78 | } | |
1adf2230 AA |
79 | |
80 | fs_cluster_id_t fscid = FS_CLUSTER_ID_NONE; | |
81 | MDSMap mds_map; | |
7c673cae FG |
82 | }; |
83 | WRITE_CLASS_ENCODER_FEATURES(Filesystem) | |
84 | ||
85 | class FSMap { | |
7c673cae | 86 | public: |
7c673cae | 87 | friend class MDSMonitor; |
28e407b8 | 88 | friend class PaxosFSMap; |
9f95a23c | 89 | using mds_info_t = MDSMap::mds_info_t; |
7c673cae | 90 | |
1adf2230 | 91 | FSMap() : compat(MDSMap::get_compat_set_default()) {} |
7c673cae FG |
92 | |
93 | FSMap(const FSMap &rhs) | |
94 | : | |
95 | epoch(rhs.epoch), | |
96 | next_filesystem_id(rhs.next_filesystem_id), | |
97 | legacy_client_fscid(rhs.legacy_client_fscid), | |
98 | compat(rhs.compat), | |
99 | enable_multiple(rhs.enable_multiple), | |
100 | ever_enabled_multiple(rhs.ever_enabled_multiple), | |
101 | mds_roles(rhs.mds_roles), | |
102 | standby_daemons(rhs.standby_daemons), | |
103 | standby_epochs(rhs.standby_epochs) | |
104 | { | |
b32b8144 | 105 | filesystems.clear(); |
7c673cae FG |
106 | for (const auto &i : rhs.filesystems) { |
107 | const auto &fs = i.second; | |
108 | filesystems[fs->fscid] = std::make_shared<Filesystem>(*fs); | |
109 | } | |
110 | } | |
111 | ||
9f95a23c | 112 | FSMap &operator=(const FSMap &rhs); |
7c673cae FG |
113 | |
114 | const CompatSet &get_compat() const {return compat;} | |
115 | ||
116 | void set_enable_multiple(const bool v) | |
117 | { | |
118 | enable_multiple = v; | |
119 | if (true == v) { | |
120 | ever_enabled_multiple = true; | |
121 | } | |
122 | } | |
123 | ||
124 | bool get_enable_multiple() const | |
125 | { | |
126 | return enable_multiple; | |
127 | } | |
128 | ||
129 | void set_legacy_client_fscid(fs_cluster_id_t fscid) | |
130 | { | |
11fdf7f2 | 131 | ceph_assert(fscid == FS_CLUSTER_ID_NONE || filesystems.count(fscid)); |
7c673cae FG |
132 | legacy_client_fscid = fscid; |
133 | } | |
134 | ||
135 | fs_cluster_id_t get_legacy_client_fscid() const | |
136 | { | |
137 | return legacy_client_fscid; | |
138 | } | |
139 | ||
11fdf7f2 TL |
140 | size_t get_num_standby() const { |
141 | return standby_daemons.size(); | |
142 | } | |
143 | ||
9f95a23c | 144 | bool is_any_degraded() const; |
11fdf7f2 | 145 | |
7c673cae FG |
146 | /** |
147 | * Get state of all daemons (for all filesystems, including all standbys) | |
148 | */ | |
9f95a23c | 149 | std::map<mds_gid_t, mds_info_t> get_mds_info() const; |
7c673cae | 150 | |
9f95a23c | 151 | const mds_info_t* get_available_standby(fs_cluster_id_t fscid) const; |
11fdf7f2 | 152 | |
7c673cae FG |
153 | /** |
154 | * Resolve daemon name to GID | |
155 | */ | |
9f95a23c | 156 | mds_gid_t find_mds_gid_by_name(std::string_view s) const; |
7c673cae FG |
157 | |
158 | /** | |
159 | * Resolve daemon name to status | |
160 | */ | |
9f95a23c | 161 | const mds_info_t* find_by_name(std::string_view name) const; |
7c673cae FG |
162 | |
163 | /** | |
164 | * Does a daemon exist with this GID? | |
165 | */ | |
166 | bool gid_exists(mds_gid_t gid) const | |
167 | { | |
168 | return mds_roles.count(gid) > 0; | |
169 | } | |
170 | ||
171 | /** | |
172 | * Does a daemon with this GID exist, *and* have an MDS rank assigned? | |
173 | */ | |
174 | bool gid_has_rank(mds_gid_t gid) const | |
175 | { | |
176 | return gid_exists(gid) && mds_roles.at(gid) != FS_CLUSTER_ID_NONE; | |
177 | } | |
178 | ||
9f95a23c TL |
179 | fs_cluster_id_t gid_fscid(mds_gid_t gid) const |
180 | { | |
181 | return mds_roles.at(gid); | |
182 | } | |
183 | ||
7c673cae FG |
184 | /** |
185 | * Insert a new MDS daemon, as a standby | |
186 | */ | |
9f95a23c | 187 | void insert(const mds_info_t& new_info); |
7c673cae FG |
188 | |
189 | /** | |
190 | * Assign an MDS cluster standby replay rank to a standby daemon | |
191 | */ | |
192 | void assign_standby_replay( | |
193 | const mds_gid_t standby_gid, | |
194 | const fs_cluster_id_t leader_ns, | |
195 | const mds_rank_t leader_rank); | |
196 | ||
197 | /** | |
198 | * Assign an MDS cluster rank to a standby daemon | |
199 | */ | |
200 | void promote( | |
201 | mds_gid_t standby_gid, | |
11fdf7f2 | 202 | Filesystem& filesystem, |
7c673cae FG |
203 | mds_rank_t assigned_rank); |
204 | ||
205 | /** | |
206 | * A daemon reports that it is STATE_STOPPED: remove it, | |
207 | * and the rank it held. | |
208 | * | |
209 | * @returns a list of any additional GIDs that were removed from the map | |
210 | * as a side effect (like standby replays) | |
211 | */ | |
9f95a23c | 212 | std::vector<mds_gid_t> stop(mds_gid_t who); |
7c673cae FG |
213 | |
214 | /** | |
215 | * The rank held by 'who', if any, is to be relinquished, and | |
216 | * the state for the daemon GID is to be forgotten. | |
217 | */ | |
218 | void erase(mds_gid_t who, epoch_t blacklist_epoch); | |
219 | ||
220 | /** | |
221 | * Update to indicate that the rank held by 'who' is damaged | |
222 | */ | |
223 | void damaged(mds_gid_t who, epoch_t blacklist_epoch); | |
224 | ||
225 | /** | |
226 | * Update to indicate that the rank `rank` is to be removed | |
227 | * from the damaged list of the filesystem `fscid` | |
228 | */ | |
229 | bool undamaged(const fs_cluster_id_t fscid, const mds_rank_t rank); | |
230 | ||
231 | /** | |
232 | * Initialize a Filesystem and assign a fscid. Update legacy_client_fscid | |
233 | * to point to the new filesystem if it's the only one. | |
234 | * | |
235 | * Caller must already have validated all arguments vs. the existing | |
236 | * FSMap and OSDMap contents. | |
237 | */ | |
11fdf7f2 TL |
238 | Filesystem::ref create_filesystem( |
239 | std::string_view name, int64_t metadata_pool, | |
240 | int64_t data_pool, uint64_t features); | |
7c673cae FG |
241 | |
242 | /** | |
243 | * Remove the filesystem (it must exist). Caller should already | |
244 | * have failed out any MDSs that were assigned to the filesystem. | |
245 | */ | |
9f95a23c | 246 | void erase_filesystem(fs_cluster_id_t fscid); |
7c673cae FG |
247 | |
248 | /** | |
249 | * Reset all the state information (not configuration information) | |
250 | * in a particular filesystem. Caller must have verified that | |
251 | * the filesystem already exists. | |
252 | */ | |
253 | void reset_filesystem(fs_cluster_id_t fscid); | |
254 | ||
255 | /** | |
256 | * Mutator helper for Filesystem objects: expose a non-const | |
257 | * Filesystem pointer to `fn` and update epochs appropriately. | |
258 | */ | |
11fdf7f2 TL |
259 | template<typename T> |
260 | void modify_filesystem(fs_cluster_id_t fscid, T&& fn) | |
7c673cae | 261 | { |
11fdf7f2 | 262 | auto& fs = filesystems.at(fscid); |
7c673cae FG |
263 | fn(fs); |
264 | fs->mds_map.epoch = epoch; | |
265 | } | |
266 | ||
267 | /** | |
268 | * Apply a mutation to the mds_info_t structure for a particular | |
269 | * daemon (identified by GID), and make appropriate updates to epochs. | |
270 | */ | |
11fdf7f2 TL |
271 | template<typename T> |
272 | void modify_daemon(mds_gid_t who, T&& fn) | |
7c673cae | 273 | { |
11fdf7f2 TL |
274 | const auto& fscid = mds_roles.at(who); |
275 | if (fscid == FS_CLUSTER_ID_NONE) { | |
276 | auto& info = standby_daemons.at(who); | |
277 | fn(info); | |
278 | ceph_assert(info.state == MDSMap::STATE_STANDBY); | |
7c673cae FG |
279 | standby_epochs[who] = epoch; |
280 | } else { | |
11fdf7f2 TL |
281 | auto& fs = filesystems.at(fscid); |
282 | auto& info = fs->mds_map.mds_info.at(who); | |
283 | fn(info); | |
7c673cae FG |
284 | fs->mds_map.epoch = epoch; |
285 | } | |
286 | } | |
287 | ||
288 | /** | |
289 | * Given that gid exists in a filesystem or as a standby, return | |
290 | * a reference to its info. | |
291 | */ | |
9f95a23c | 292 | const mds_info_t& get_info_gid(mds_gid_t gid) const |
7c673cae FG |
293 | { |
294 | auto fscid = mds_roles.at(gid); | |
295 | if (fscid == FS_CLUSTER_ID_NONE) { | |
296 | return standby_daemons.at(gid); | |
297 | } else { | |
298 | return filesystems.at(fscid)->mds_map.mds_info.at(gid); | |
299 | } | |
300 | } | |
301 | ||
11fdf7f2 TL |
302 | bool is_standby_replay(mds_gid_t who) const |
303 | { | |
304 | return filesystems.at(mds_roles.at(who))->is_standby_replay(who); | |
305 | } | |
306 | ||
307 | mds_gid_t get_standby_replay(mds_gid_t who) const | |
308 | { | |
309 | return filesystems.at(mds_roles.at(who))->get_standby_replay(who); | |
310 | } | |
311 | ||
7c673cae FG |
312 | /** |
313 | * A daemon has told us it's compat, and it's too new | |
314 | * for the one we had previously. Impose the new one | |
315 | * on all filesystems. | |
316 | */ | |
9f95a23c | 317 | void update_compat(const CompatSet &c); |
7c673cae | 318 | |
11fdf7f2 | 319 | Filesystem::const_ref get_legacy_filesystem() |
7c673cae FG |
320 | { |
321 | if (legacy_client_fscid == FS_CLUSTER_ID_NONE) { | |
322 | return nullptr; | |
323 | } else { | |
324 | return filesystems.at(legacy_client_fscid); | |
325 | } | |
326 | } | |
327 | ||
328 | /** | |
329 | * A daemon has informed us of its offload targets | |
330 | */ | |
11fdf7f2 | 331 | void update_export_targets(mds_gid_t who, const std::set<mds_rank_t> &targets) |
7c673cae FG |
332 | { |
333 | auto fscid = mds_roles.at(who); | |
11fdf7f2 | 334 | modify_filesystem(fscid, [who, &targets](auto&& fs) { |
7c673cae FG |
335 | fs->mds_map.mds_info.at(who).export_targets = targets; |
336 | }); | |
337 | } | |
338 | ||
339 | epoch_t get_epoch() const { return epoch; } | |
340 | void inc_epoch() { epoch++; } | |
341 | ||
342 | size_t filesystem_count() const {return filesystems.size();} | |
343 | bool filesystem_exists(fs_cluster_id_t fscid) const {return filesystems.count(fscid) > 0;} | |
11fdf7f2 TL |
344 | Filesystem::const_ref get_filesystem(fs_cluster_id_t fscid) const {return std::const_pointer_cast<const Filesystem>(filesystems.at(fscid));} |
345 | Filesystem::ref get_filesystem(fs_cluster_id_t fscid) {return filesystems.at(fscid);} | |
346 | Filesystem::const_ref get_filesystem(void) const {return std::const_pointer_cast<const Filesystem>(filesystems.begin()->second);} | |
9f95a23c TL |
347 | Filesystem::const_ref get_filesystem(std::string_view name) const; |
348 | ||
349 | std::vector<Filesystem::const_ref> get_filesystems(void) const; | |
7c673cae FG |
350 | |
351 | int parse_filesystem( | |
11fdf7f2 TL |
352 | std::string_view ns_str, |
353 | Filesystem::const_ref *result | |
7c673cae FG |
354 | ) const; |
355 | ||
356 | int parse_role( | |
11fdf7f2 | 357 | std::string_view role_str, |
7c673cae FG |
358 | mds_role_t *role, |
359 | std::ostream &ss) const; | |
360 | ||
361 | /** | |
362 | * Return true if this pool is in use by any of the filesystems | |
363 | */ | |
9f95a23c | 364 | bool pool_in_use(int64_t poolid) const; |
7c673cae | 365 | |
9f95a23c | 366 | const mds_info_t* find_replacement_for(mds_role_t role) const; |
7c673cae FG |
367 | |
368 | void get_health(list<pair<health_status_t,std::string> >& summary, | |
369 | list<pair<health_status_t,std::string> > *detail) const; | |
370 | ||
224ce89b WB |
371 | void get_health_checks(health_check_map_t *checks) const; |
372 | ||
7c673cae FG |
373 | bool check_health(void); |
374 | ||
375 | /** | |
376 | * Assert that the FSMap, Filesystem, MDSMap, mds_info_t relations are | |
377 | * all self-consistent. | |
378 | */ | |
379 | void sanity() const; | |
380 | ||
381 | void encode(bufferlist& bl, uint64_t features) const; | |
11fdf7f2 | 382 | void decode(bufferlist::const_iterator& p); |
7c673cae | 383 | void decode(bufferlist& bl) { |
11fdf7f2 | 384 | auto p = bl.cbegin(); |
7c673cae FG |
385 | decode(p); |
386 | } | |
11fdf7f2 | 387 | void sanitize(const std::function<bool(int64_t pool)>& pool_exists); |
7c673cae FG |
388 | |
389 | void print(ostream& out) const; | |
390 | void print_summary(Formatter *f, ostream *out) const; | |
391 | ||
392 | void dump(Formatter *f) const; | |
9f95a23c TL |
393 | static void generate_test_instances(std::list<FSMap*>& ls); |
394 | ||
395 | protected: | |
396 | epoch_t epoch = 0; | |
397 | uint64_t next_filesystem_id = FS_CLUSTER_ID_ANONYMOUS + 1; | |
398 | fs_cluster_id_t legacy_client_fscid = FS_CLUSTER_ID_NONE; | |
399 | CompatSet compat; | |
400 | bool enable_multiple = false; | |
401 | bool ever_enabled_multiple = false; // < the cluster had multiple MDSes enabled once | |
402 | ||
403 | std::map<fs_cluster_id_t, Filesystem::ref> filesystems; | |
404 | ||
405 | // Remember which Filesystem an MDS daemon's info is stored in | |
406 | // (or in standby_daemons for FS_CLUSTER_ID_NONE) | |
407 | std::map<mds_gid_t, fs_cluster_id_t> mds_roles; | |
408 | ||
409 | // For MDS daemons not yet assigned to a Filesystem | |
410 | std::map<mds_gid_t, mds_info_t> standby_daemons; | |
411 | std::map<mds_gid_t, epoch_t> standby_epochs; | |
7c673cae FG |
412 | }; |
413 | WRITE_CLASS_ENCODER_FEATURES(FSMap) | |
414 | ||
415 | inline ostream& operator<<(ostream& out, const FSMap& m) { | |
416 | m.print_summary(NULL, &out); | |
417 | return out; | |
418 | } | |
419 | ||
420 | #endif |