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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 | ||
94b18763 FG |
18 | #include <boost/utility/string_view.hpp> |
19 | ||
7c673cae FG |
20 | #include "mdstypes.h" |
21 | #include "common/snap_types.h" | |
22 | ||
23 | /* | |
24 | * generic snap descriptor. | |
25 | */ | |
26 | struct SnapInfo { | |
27 | snapid_t snapid; | |
28 | inodeno_t ino; | |
29 | utime_t stamp; | |
30 | string name; | |
31 | ||
32 | string long_name; ///< cached _$ino_$name | |
33 | ||
34 | void encode(bufferlist &bl) const; | |
35 | void decode(bufferlist::iterator &bl); | |
36 | void dump(Formatter *f) const; | |
37 | static void generate_test_instances(list<SnapInfo*>& ls); | |
38 | ||
94b18763 | 39 | boost::string_view get_long_name(); |
7c673cae FG |
40 | }; |
41 | WRITE_CLASS_ENCODER(SnapInfo) | |
42 | ||
43 | ostream& operator<<(ostream& out, const SnapInfo &sn); | |
44 | ||
45 | ||
46 | /* | |
47 | * SnapRealm - a subtree that shares the same set of snapshots. | |
48 | */ | |
49 | struct SnapRealm; | |
50 | class CInode; | |
51 | class MDCache; | |
52 | ||
53 | ||
54 | ||
55 | #include "Capability.h" | |
56 | ||
57 | struct snaplink_t { | |
58 | inodeno_t ino; | |
59 | snapid_t first; | |
60 | ||
61 | void encode(bufferlist &bl) const; | |
62 | void decode(bufferlist::iterator &bl); | |
63 | void dump(Formatter *f) const; | |
64 | static void generate_test_instances(list<snaplink_t*>& ls); | |
65 | }; | |
66 | WRITE_CLASS_ENCODER(snaplink_t) | |
67 | ||
68 | ostream& operator<<(ostream& out, const snaplink_t &l); | |
69 | ||
70 | ||
71 | // carry data about a specific version of a SnapRealm | |
72 | struct sr_t { | |
73 | snapid_t seq; // basically, a version/seq # for changes to _this_ realm. | |
74 | snapid_t created; // when this realm was created. | |
75 | snapid_t last_created; // last snap created in _this_ realm. | |
76 | snapid_t last_destroyed; // seq for last removal | |
77 | snapid_t current_parent_since; | |
78 | map<snapid_t, SnapInfo> snaps; | |
79 | map<snapid_t, snaplink_t> past_parents; // key is "last" (or NOSNAP) | |
80 | ||
81 | sr_t() | |
82 | : seq(0), created(0), | |
83 | last_created(0), last_destroyed(0), | |
84 | current_parent_since(1) | |
85 | {} | |
86 | ||
87 | void encode(bufferlist &bl) const; | |
88 | void decode(bufferlist::iterator &bl); | |
89 | void dump(Formatter *f) const; | |
90 | static void generate_test_instances(list<sr_t*>& ls); | |
91 | }; | |
92 | WRITE_CLASS_ENCODER(sr_t) | |
93 | ||
94 | #endif |