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git.proxmox.com Git - ceph.git/blob - ceph/src/os/bluestore/BitmapFreelistManager.h
1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 #ifndef CEPH_OS_BLUESTORE_BITMAPFREELISTMANAGER_H
5 #define CEPH_OS_BLUESTORE_BITMAPFREELISTMANAGER_H
7 #include "FreelistManager.h"
12 #include "include/buffer.h"
13 #include "kv/KeyValueDB.h"
15 class BitmapFreelistManager
: public FreelistManager
{
16 std::string meta_prefix
, bitmap_prefix
;
18 ceph::shared_ptr
<KeyValueDB::MergeOperator
> merge_op
;
21 uint64_t size
; ///< size of device (bytes)
22 uint64_t bytes_per_block
; ///< bytes per block (bdev_block_size)
23 uint64_t blocks_per_key
; ///< blocks (bits) per key/value pair
24 uint64_t bytes_per_key
; ///< bytes per key/value pair
25 uint64_t blocks
; ///< size of device (blocks, size rounded up)
27 uint64_t block_mask
; ///< mask to convert byte offset to block offset
28 uint64_t key_mask
; ///< mask to convert offset to key offset
30 bufferlist all_set_bl
;
32 KeyValueDB::Iterator enumerate_p
;
33 uint64_t enumerate_offset
; ///< logical offset; position
34 bufferlist enumerate_bl
; ///< current key at enumerate_offset
35 int enumerate_bl_pos
; ///< bit position in enumerate_bl
37 uint64_t _get_offset(uint64_t key_off
, int bit
) {
38 return key_off
+ bit
* bytes_per_block
;
43 void _verify_range(uint64_t offset
, uint64_t length
, int val
);
45 uint64_t offset
, uint64_t length
,
46 KeyValueDB::Transaction txn
);
49 BitmapFreelistManager(CephContext
* cct
, KeyValueDB
*db
, string meta_prefix
,
50 string bitmap_prefix
);
52 static void setup_merge_operator(KeyValueDB
*db
, string prefix
);
54 int create(uint64_t size
, KeyValueDB::Transaction txn
) override
;
57 void shutdown() override
;
61 void enumerate_reset() override
;
62 bool enumerate_next(uint64_t *offset
, uint64_t *length
) override
;
65 uint64_t offset
, uint64_t length
,
66 KeyValueDB::Transaction txn
) override
;
68 uint64_t offset
, uint64_t length
,
69 KeyValueDB::Transaction txn
) override
;