mirror of
https://github.com/ceph/ceph
synced 2025-01-20 10:01:45 +00:00
73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
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// vim: ts=8 sw=2 smarttab
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#ifndef CEPH_OS_BLUESTORE_BITMAPFREELISTMANAGER_H
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#define CEPH_OS_BLUESTORE_BITMAPFREELISTMANAGER_H
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#include "FreelistManager.h"
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#include <string>
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#include <mutex>
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#include "include/buffer.h"
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#include "kv/KeyValueDB.h"
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class BitmapFreelistManager : public FreelistManager {
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std::string meta_prefix, bitmap_prefix;
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KeyValueDB *kvdb;
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ceph::shared_ptr<KeyValueDB::MergeOperator> merge_op;
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std::mutex lock;
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uint64_t size; ///< size of device (bytes)
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uint64_t bytes_per_block; ///< bytes per block (bdev_block_size)
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uint64_t blocks_per_key; ///< blocks (bits) per key/value pair
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uint64_t bytes_per_key; ///< bytes per key/value pair
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uint64_t blocks; ///< size of device (blocks, size rounded up)
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uint64_t block_mask; ///< mask to convert byte offset to block offset
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uint64_t key_mask; ///< mask to convert offset to key offset
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bufferlist all_set_bl;
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KeyValueDB::Iterator enumerate_p;
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uint64_t enumerate_offset; ///< logical offset; position
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bufferlist enumerate_bl; ///< current key at enumerate_offset
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int enumerate_bl_pos; ///< bit position in enumerate_bl
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uint64_t _get_offset(uint64_t key_off, int bit) {
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return key_off + bit * bytes_per_block;
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}
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void _init_misc();
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void _verify_range(uint64_t offset, uint64_t length, int val);
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void _xor(
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uint64_t offset, uint64_t length,
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KeyValueDB::Transaction txn);
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public:
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BitmapFreelistManager(CephContext* cct, KeyValueDB *db, string meta_prefix,
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string bitmap_prefix);
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static void setup_merge_operator(KeyValueDB *db, string prefix);
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int create(uint64_t size, KeyValueDB::Transaction txn) override;
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int init() override;
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void shutdown() override;
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void dump() override;
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void enumerate_reset() override;
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bool enumerate_next(uint64_t *offset, uint64_t *length) override;
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void allocate(
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uint64_t offset, uint64_t length,
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KeyValueDB::Transaction txn) override;
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void release(
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uint64_t offset, uint64_t length,
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KeyValueDB::Transaction txn) override;
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};
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#endif
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