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
|
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* 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_OS_BLUESTORE_ALLOCATOR_H
#define CEPH_OS_BLUESTORE_ALLOCATOR_H
#include <ostream>
#include "include/ceph_assert.h"
#include "os/bluestore/bluestore_types.h"
#include <functional>
class Allocator {
public:
explicit Allocator(const std::string& name);
virtual ~Allocator();
/*
* Allocate required number of blocks in n number of extents.
* Min and Max number of extents are limited by:
* a. alloc unit
* b. max_alloc_size.
* as no extent can be lesser than alloc_unit and greater than max_alloc size.
* Apart from that extents can vary between these lower and higher limits according
* to free block search algorithm and availability of contiguous space.
*/
virtual int64_t allocate(uint64_t want_size, uint64_t alloc_unit,
uint64_t max_alloc_size, int64_t hint,
PExtentVector *extents) = 0;
int64_t allocate(uint64_t want_size, uint64_t alloc_unit,
int64_t hint, PExtentVector *extents) {
return allocate(want_size, alloc_unit, want_size, hint, extents);
}
/* Bulk release. Implementations may override this method to handle the whole
* set at once. This could save e.g. unnecessary mutex dance. */
virtual void release(const interval_set<uint64_t>& release_set) = 0;
void release(const PExtentVector& release_set);
virtual void dump() = 0;
virtual void dump(std::function<void(uint64_t offset, uint64_t length)> notify) = 0;
virtual void init_add_free(uint64_t offset, uint64_t length) = 0;
virtual void init_rm_free(uint64_t offset, uint64_t length) = 0;
virtual uint64_t get_free() = 0;
virtual double get_fragmentation()
{
return 0.0;
}
virtual double get_fragmentation_score();
virtual void shutdown() = 0;
static Allocator *create(CephContext* cct, string type, int64_t size,
int64_t block_size, const std::string& name = "");
const string& get_name() const;
private:
class SocketHook;
SocketHook* asok_hook = nullptr;
};
#endif
|
