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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 | #ifndef CEPH_MDS_SNAP_H | |
16 | #define CEPH_MDS_SNAP_H | |
17 | ||
18 | #include "mdstypes.h" | |
19 | #include "common/snap_types.h" | |
20 | ||
21 | /* | |
22 | * generic snap descriptor. | |
23 | */ | |
24 | struct SnapInfo { | |
25 | snapid_t snapid; | |
26 | inodeno_t ino; | |
27 | utime_t stamp; | |
28 | string name; | |
29 | ||
30 | string long_name; ///< cached _$ino_$name | |
31 | ||
32 | void encode(bufferlist &bl) const; | |
33 | void decode(bufferlist::iterator &bl); | |
34 | void dump(Formatter *f) const; | |
35 | static void generate_test_instances(list<SnapInfo*>& ls); | |
36 | ||
37 | const string& get_long_name(); | |
38 | }; | |
39 | WRITE_CLASS_ENCODER(SnapInfo) | |
40 | ||
41 | ostream& operator<<(ostream& out, const SnapInfo &sn); | |
42 | ||
43 | ||
44 | /* | |
45 | * SnapRealm - a subtree that shares the same set of snapshots. | |
46 | */ | |
47 | struct SnapRealm; | |
48 | class CInode; | |
49 | class MDCache; | |
50 | ||
51 | ||
52 | ||
53 | #include "Capability.h" | |
54 | ||
55 | struct snaplink_t { | |
56 | inodeno_t ino; | |
57 | snapid_t first; | |
58 | ||
59 | void encode(bufferlist &bl) const; | |
60 | void decode(bufferlist::iterator &bl); | |
61 | void dump(Formatter *f) const; | |
62 | static void generate_test_instances(list<snaplink_t*>& ls); | |
63 | }; | |
64 | WRITE_CLASS_ENCODER(snaplink_t) | |
65 | ||
66 | ostream& operator<<(ostream& out, const snaplink_t &l); | |
67 | ||
68 | ||
69 | // carry data about a specific version of a SnapRealm | |
70 | struct sr_t { | |
71 | snapid_t seq; // basically, a version/seq # for changes to _this_ realm. | |
72 | snapid_t created; // when this realm was created. | |
73 | snapid_t last_created; // last snap created in _this_ realm. | |
74 | snapid_t last_destroyed; // seq for last removal | |
75 | snapid_t current_parent_since; | |
76 | map<snapid_t, SnapInfo> snaps; | |
77 | map<snapid_t, snaplink_t> past_parents; // key is "last" (or NOSNAP) | |
78 | ||
79 | sr_t() | |
80 | : seq(0), created(0), | |
81 | last_created(0), last_destroyed(0), | |
82 | current_parent_since(1) | |
83 | {} | |
84 | ||
85 | void encode(bufferlist &bl) const; | |
86 | void decode(bufferlist::iterator &bl); | |
87 | void dump(Formatter *f) const; | |
88 | static void generate_test_instances(list<sr_t*>& ls); | |
89 | }; | |
90 | WRITE_CLASS_ENCODER(sr_t) | |
91 | ||
92 | #endif |