]>
Commit | Line | Data |
---|---|---|
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 | * 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 | #include "common/debug.h" | |
16 | ||
17 | #include "mds/CDir.h" | |
18 | ||
19 | #include "DamageTable.h" | |
20 | ||
21 | #define dout_context g_ceph_context | |
22 | #define dout_subsys ceph_subsys_mds | |
23 | #undef dout_prefix | |
24 | #define dout_prefix *_dout << "mds." << rank << ".damage " << __func__ << " " | |
25 | ||
26 | namespace { | |
27 | /** | |
28 | * Record damage to a particular dirfrag, implicitly affecting | |
29 | * any dentries within it. | |
30 | */ | |
31 | class DirFragDamage : public DamageEntry | |
32 | { | |
33 | public: | |
34 | inodeno_t ino; | |
35 | frag_t frag; | |
36 | ||
37 | DirFragDamage(inodeno_t ino_, frag_t frag_) | |
38 | : ino(ino_), frag(frag_) | |
39 | {} | |
40 | ||
41 | damage_entry_type_t get_type() const override | |
42 | { | |
43 | return DAMAGE_ENTRY_DIRFRAG; | |
44 | } | |
45 | ||
46 | void dump(Formatter *f) const override | |
47 | { | |
48 | f->open_object_section("dir_frag_damage"); | |
49 | f->dump_string("damage_type", "dir_frag"); | |
50 | f->dump_int("id", id); | |
51 | f->dump_int("ino", ino); | |
52 | f->dump_stream("frag") << frag; | |
53 | f->dump_string("path", path); | |
54 | f->close_section(); | |
55 | } | |
56 | }; | |
57 | ||
58 | ||
59 | /** | |
60 | * Record damage to a particular dname within a particular dirfrag | |
61 | */ | |
62 | class DentryDamage : public DamageEntry | |
63 | { | |
64 | public: | |
65 | inodeno_t ino; | |
66 | frag_t frag; | |
67 | std::string dname; | |
68 | snapid_t snap_id; | |
69 | ||
70 | DentryDamage( | |
71 | inodeno_t ino_, | |
72 | frag_t frag_, | |
94b18763 | 73 | boost::string_view dname_, |
7c673cae FG |
74 | snapid_t snap_id_) |
75 | : ino(ino_), frag(frag_), dname(dname_), snap_id(snap_id_) | |
76 | {} | |
77 | ||
78 | damage_entry_type_t get_type() const override | |
79 | { | |
80 | return DAMAGE_ENTRY_DENTRY; | |
81 | } | |
82 | ||
83 | void dump(Formatter *f) const override | |
84 | { | |
85 | f->open_object_section("dentry_damage"); | |
86 | f->dump_string("damage_type", "dentry"); | |
87 | f->dump_int("id", id); | |
88 | f->dump_int("ino", ino); | |
89 | f->dump_stream("frag") << frag; | |
90 | f->dump_string("dname", dname); | |
91 | f->dump_stream("snap_id") << snap_id; | |
92 | f->dump_string("path", path); | |
93 | f->close_section(); | |
94 | } | |
95 | }; | |
96 | ||
97 | ||
98 | /** | |
99 | * Record damage to our ability to look up an ino by number | |
100 | */ | |
101 | class BacktraceDamage : public DamageEntry | |
102 | { | |
103 | public: | |
104 | inodeno_t ino; | |
105 | ||
106 | BacktraceDamage(inodeno_t ino_) | |
107 | : ino(ino_) | |
108 | {} | |
109 | ||
110 | damage_entry_type_t get_type() const override | |
111 | { | |
112 | return DAMAGE_ENTRY_BACKTRACE; | |
113 | } | |
114 | ||
115 | void dump(Formatter *f) const override | |
116 | { | |
117 | f->open_object_section("backtrace_damage"); | |
118 | f->dump_string("damage_type", "backtrace"); | |
119 | f->dump_int("id", id); | |
120 | f->dump_int("ino", ino); | |
121 | f->dump_string("path", path); | |
122 | f->close_section(); | |
123 | } | |
124 | }; | |
125 | } | |
126 | ||
127 | DamageEntry::~DamageEntry() | |
128 | {} | |
129 | ||
130 | bool DamageTable::notify_dentry( | |
131 | inodeno_t ino, frag_t frag, | |
94b18763 | 132 | snapid_t snap_id, boost::string_view dname, boost::string_view path) |
7c673cae FG |
133 | { |
134 | if (oversized()) { | |
135 | return true; | |
136 | } | |
137 | ||
138 | // Special cases: damage to these dirfrags is considered fatal to | |
139 | // the MDS rank that owns them. | |
140 | if ( | |
141 | (MDS_INO_IS_MDSDIR(ino) && MDS_INO_MDSDIR_OWNER(ino) == rank) | |
142 | || | |
143 | (MDS_INO_IS_STRAY(ino) && MDS_INO_STRAY_OWNER(ino) == rank) | |
144 | ) { | |
145 | derr << "Damage to dentries in fragment " << frag << " of ino " << ino | |
146 | << "is fatal because it is a system directory for this rank" << dendl; | |
147 | return true; | |
148 | } | |
149 | ||
150 | auto key = DirFragIdent(ino, frag); | |
151 | if (dentries.count(key) == 0) { | |
152 | DamageEntryRef entry = std::make_shared<DentryDamage>( | |
153 | ino, frag, dname, snap_id); | |
94b18763 | 154 | entry->path = std::string(path); |
7c673cae FG |
155 | dentries[key][DentryIdent(dname, snap_id)] = entry; |
156 | by_id[entry->id] = std::move(entry); | |
157 | } | |
158 | ||
159 | return false; | |
160 | } | |
161 | ||
162 | bool DamageTable::notify_dirfrag(inodeno_t ino, frag_t frag, | |
94b18763 | 163 | boost::string_view path) |
7c673cae FG |
164 | { |
165 | // Special cases: damage to these dirfrags is considered fatal to | |
166 | // the MDS rank that owns them. | |
167 | if ( | |
168 | (MDS_INO_IS_STRAY(ino) && MDS_INO_STRAY_OWNER(ino) == rank) | |
169 | || | |
170 | (ino == MDS_INO_ROOT) | |
171 | ) { | |
172 | derr << "Damage to fragment " << frag << " of ino " << ino | |
173 | << " is fatal because it is a system directory for this rank" << dendl; | |
174 | return true; | |
175 | } | |
176 | ||
177 | if (oversized()) { | |
178 | return true; | |
179 | } | |
180 | ||
181 | auto key = DirFragIdent(ino, frag); | |
182 | if (dirfrags.count(key) == 0) { | |
183 | DamageEntryRef entry = std::make_shared<DirFragDamage>(ino, frag); | |
94b18763 | 184 | entry->path = std::string(path); |
7c673cae FG |
185 | dirfrags[key] = entry; |
186 | by_id[entry->id] = std::move(entry); | |
187 | } | |
188 | ||
189 | return false; | |
190 | } | |
191 | ||
94b18763 | 192 | bool DamageTable::notify_remote_damaged(inodeno_t ino, boost::string_view path) |
7c673cae FG |
193 | { |
194 | if (oversized()) { | |
195 | return true; | |
196 | } | |
197 | ||
198 | if (remotes.count(ino) == 0) { | |
199 | auto entry = std::make_shared<BacktraceDamage>(ino); | |
94b18763 | 200 | entry->path = std::string(path); |
7c673cae FG |
201 | remotes[ino] = entry; |
202 | by_id[entry->id] = std::move(entry); | |
203 | } | |
204 | ||
205 | return false; | |
206 | } | |
207 | ||
208 | bool DamageTable::oversized() const | |
209 | { | |
210 | return by_id.size() > (size_t)(g_conf->mds_damage_table_max_entries); | |
211 | } | |
212 | ||
213 | bool DamageTable::is_dentry_damaged( | |
214 | const CDir *dir_frag, | |
94b18763 | 215 | boost::string_view dname, |
7c673cae FG |
216 | const snapid_t snap_id) const |
217 | { | |
218 | if (dentries.count( | |
219 | DirFragIdent(dir_frag->inode->ino(), dir_frag->frag) | |
220 | ) == 0) { | |
221 | return false; | |
222 | } | |
223 | ||
224 | const std::map<DentryIdent, DamageEntryRef> &frag_dentries = | |
225 | dentries.at(DirFragIdent(dir_frag->inode->ino(), dir_frag->frag)); | |
226 | ||
227 | return frag_dentries.count(DentryIdent(dname, snap_id)) > 0; | |
228 | } | |
229 | ||
230 | bool DamageTable::is_dirfrag_damaged( | |
231 | const CDir *dir_frag) const | |
232 | { | |
233 | return dirfrags.count( | |
234 | DirFragIdent(dir_frag->inode->ino(), dir_frag->frag)) > 0; | |
235 | } | |
236 | ||
237 | bool DamageTable::is_remote_damaged( | |
238 | const inodeno_t ino) const | |
239 | { | |
240 | return remotes.count(ino) > 0; | |
241 | } | |
242 | ||
243 | void DamageTable::dump(Formatter *f) const | |
244 | { | |
245 | f->open_array_section("damage_table"); | |
246 | for (const auto &i : by_id) | |
247 | { | |
248 | i.second->dump(f); | |
249 | } | |
250 | f->close_section(); | |
251 | } | |
252 | ||
253 | void DamageTable::erase(damage_entry_id_t damage_id) | |
254 | { | |
255 | auto by_id_entry = by_id.find(damage_id); | |
256 | if (by_id_entry == by_id.end()) { | |
257 | return; | |
258 | } | |
259 | ||
260 | DamageEntryRef entry = by_id_entry->second; | |
261 | assert(entry->id == damage_id); // Sanity | |
262 | ||
263 | const auto type = entry->get_type(); | |
264 | if (type == DAMAGE_ENTRY_DIRFRAG) { | |
265 | auto dirfrag_entry = std::static_pointer_cast<DirFragDamage>(entry); | |
266 | dirfrags.erase(DirFragIdent(dirfrag_entry->ino, dirfrag_entry->frag)); | |
267 | } else if (type == DAMAGE_ENTRY_DENTRY) { | |
268 | auto dentry_entry = std::static_pointer_cast<DentryDamage>(entry); | |
269 | dentries.erase(DirFragIdent(dentry_entry->ino, dentry_entry->frag)); | |
270 | } else if (type == DAMAGE_ENTRY_BACKTRACE) { | |
271 | auto backtrace_entry = std::static_pointer_cast<BacktraceDamage>(entry); | |
272 | remotes.erase(backtrace_entry->ino); | |
273 | } else { | |
274 | derr << "Invalid type " << type << dendl; | |
275 | ceph_abort(); | |
276 | } | |
277 | ||
278 | by_id.erase(by_id_entry); | |
279 | } | |
280 |