1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#ifndef CEPH_MDS_SNAP_H
#define CEPH_MDS_SNAP_H
#include <string_view>
#include "mdstypes.h"
#include "common/snap_types.h"
/*
* generic snap descriptor.
*/
struct SnapInfo {
snapid_t snapid;
inodeno_t ino;
utime_t stamp;
string name;
mutable string long_name; ///< cached _$ino_$name
void encode(bufferlist &bl) const;
void decode(bufferlist::const_iterator &bl);
void dump(Formatter *f) const;
static void generate_test_instances(list<SnapInfo*>& ls);
std::string_view get_long_name() const;
};
WRITE_CLASS_ENCODER(SnapInfo)
inline bool operator==(const SnapInfo &l, const SnapInfo &r)
{
return l.snapid == r.snapid && l.ino == r.ino &&
l.stamp == r.stamp && l.name == r.name;
}
ostream& operator<<(ostream& out, const SnapInfo &sn);
/*
* SnapRealm - a subtree that shares the same set of snapshots.
*/
struct SnapRealm;
class CInode;
class MDCache;
#include "Capability.h"
struct snaplink_t {
inodeno_t ino;
snapid_t first;
void encode(bufferlist &bl) const;
void decode(bufferlist::const_iterator &bl);
void dump(Formatter *f) const;
static void generate_test_instances(list<snaplink_t*>& ls);
};
WRITE_CLASS_ENCODER(snaplink_t)
ostream& operator<<(ostream& out, const snaplink_t &l);
// carry data about a specific version of a SnapRealm
struct sr_t {
snapid_t seq; // basically, a version/seq # for changes to _this_ realm.
snapid_t created; // when this realm was created.
snapid_t last_created; // last snap created in _this_ realm.
snapid_t last_destroyed; // seq for last removal
snapid_t current_parent_since;
map<snapid_t, SnapInfo> snaps;
map<snapid_t, snaplink_t> past_parents; // key is "last" (or NOSNAP)
set<snapid_t> past_parent_snaps;
__u32 flags;
enum {
PARENT_GLOBAL = 1 << 0,
SUBVOLUME = 1 << 1,
};
void mark_parent_global() { flags |= PARENT_GLOBAL; }
void clear_parent_global() { flags &= ~PARENT_GLOBAL; }
bool is_parent_global() const { return flags & PARENT_GLOBAL; }
void mark_subvolume() { flags |= SUBVOLUME; }
void clear_subvolume() { flags &= ~SUBVOLUME; }
bool is_subvolume() const { return flags & SUBVOLUME; }
sr_t()
: seq(0), created(0),
last_created(0), last_destroyed(0),
current_parent_since(1), flags(0)
{}
void encode(bufferlist &bl) const;
void decode(bufferlist::const_iterator &bl);
void dump(Formatter *f) const;
static void generate_test_instances(list<sr_t*>& ls);
};
WRITE_CLASS_ENCODER(sr_t)
#endif
|
