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rocksdb/db/kv_checksum.h

424 lines
15 KiB

// Copyright (c) 2020-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
// This file contains classes containing fields to protect individual entries.
// The classes are named "ProtectionInfo<suffix>", where <suffix> indicates the
// combination of fields that are covered. Each field has a single letter
// abbreviation as follows.
//
// K = key
// V = value
// O = optype aka value type
// T = timestamp
// S = seqno
// C = CF ID
//
// Then, for example, a class that protects an entry consisting of key, value,
// optype, timestamp, and CF ID (i.e., a `WriteBatch` entry) would be named
// `ProtectionInfoKVOTC`.
//
// The `ProtectionInfo.*` classes are templated on the integer type used to hold
// the XOR of hashes for each field. Only unsigned integer types are supported,
// and the maximum supported integer width is 64 bits. When the integer type is
// narrower than the hash values, we lop off the most significant bits to make
// them fit.
//
// The `ProtectionInfo.*` classes are all intended to be non-persistent. We do
// not currently make the byte order consistent for integer fields before
// hashing them, so the resulting values are endianness-dependent.
#pragma once
#include <type_traits>
#include "db/dbformat.h"
#include "rocksdb/types.h"
#include "util/hash.h"
namespace ROCKSDB_NAMESPACE {
template <typename T>
class ProtectionInfo;
template <typename T>
class ProtectionInfoKVOT;
template <typename T>
class ProtectionInfoKVOTC;
template <typename T>
class ProtectionInfoKVOTS;
// Aliases for 64-bit protection infos.
using ProtectionInfo64 = ProtectionInfo<uint64_t>;
using ProtectionInfoKVOT64 = ProtectionInfoKVOT<uint64_t>;
using ProtectionInfoKVOTC64 = ProtectionInfoKVOTC<uint64_t>;
using ProtectionInfoKVOTS64 = ProtectionInfoKVOTS<uint64_t>;
template <typename T>
class ProtectionInfo {
public:
ProtectionInfo<T>() = default;
Status GetStatus() const;
ProtectionInfoKVOT<T> ProtectKVOT(const Slice& key, const Slice& value,
ValueType op_type,
const Slice& timestamp) const;
ProtectionInfoKVOT<T> ProtectKVOT(const SliceParts& key,
const SliceParts& value, ValueType op_type,
const Slice& timestamp) const;
private:
friend class ProtectionInfoKVOT<T>;
friend class ProtectionInfoKVOTS<T>;
friend class ProtectionInfoKVOTC<T>;
// Each field is hashed with an independent value so we can catch fields being
// swapped. Per the `NPHash64()` docs, using consecutive seeds is a pitfall,
// and we should instead vary our seeds by a large odd number. This value by
// which we increment (0xD28AAD72F49BD50B) was taken from
// `head -c8 /dev/urandom | hexdump`, run repeatedly until it yielded an odd
// number. The values are computed manually since the Windows C++ compiler
// complains about the overflow when adding constants.
static const uint64_t kSeedK = 0;
static const uint64_t kSeedV = 0xD28AAD72F49BD50B;
static const uint64_t kSeedO = 0xA5155AE5E937AA16;
static const uint64_t kSeedT = 0x77A00858DDD37F21;
static const uint64_t kSeedS = 0x4A2AB5CBD26F542C;
static const uint64_t kSeedC = 0x1CB5633EC70B2937;
ProtectionInfo<T>(T val) : val_(val) {
static_assert(sizeof(ProtectionInfo<T>) == sizeof(T), "");
}
T GetVal() const { return val_; }
void SetVal(T val) { val_ = val; }
T val_ = 0;
};
template <typename T>
class ProtectionInfoKVOT {
public:
ProtectionInfoKVOT<T>() = default;
ProtectionInfo<T> StripKVOT(const Slice& key, const Slice& value,
ValueType op_type, const Slice& timestamp) const;
ProtectionInfo<T> StripKVOT(const SliceParts& key, const SliceParts& value,
ValueType op_type, const Slice& timestamp) const;
ProtectionInfoKVOTC<T> ProtectC(ColumnFamilyId column_family_id) const;
ProtectionInfoKVOTS<T> ProtectS(SequenceNumber sequence_number) const;
void UpdateK(const Slice& old_key, const Slice& new_key);
void UpdateK(const SliceParts& old_key, const SliceParts& new_key);
void UpdateV(const Slice& old_value, const Slice& new_value);
void UpdateV(const SliceParts& old_value, const SliceParts& new_value);
void UpdateO(ValueType old_op_type, ValueType new_op_type);
void UpdateT(const Slice& old_timestamp, const Slice& new_timestamp);
private:
friend class ProtectionInfo<T>;
friend class ProtectionInfoKVOTS<T>;
friend class ProtectionInfoKVOTC<T>;
ProtectionInfoKVOT<T>(T val) : info_(val) {
static_assert(sizeof(ProtectionInfoKVOT<T>) == sizeof(T), "");
}
T GetVal() const { return info_.GetVal(); }
void SetVal(T val) { info_.SetVal(val); }
ProtectionInfo<T> info_;
};
template <typename T>
class ProtectionInfoKVOTC {
public:
ProtectionInfoKVOTC<T>() = default;
ProtectionInfoKVOT<T> StripC(ColumnFamilyId column_family_id) const;
void UpdateK(const Slice& old_key, const Slice& new_key) {
kvot_.UpdateK(old_key, new_key);
}
void UpdateK(const SliceParts& old_key, const SliceParts& new_key) {
kvot_.UpdateK(old_key, new_key);
}
void UpdateV(const Slice& old_value, const Slice& new_value) {
kvot_.UpdateV(old_value, new_value);
}
void UpdateV(const SliceParts& old_value, const SliceParts& new_value) {
kvot_.UpdateV(old_value, new_value);
}
void UpdateO(ValueType old_op_type, ValueType new_op_type) {
kvot_.UpdateO(old_op_type, new_op_type);
}
void UpdateT(const Slice& old_timestamp, const Slice& new_timestamp) {
kvot_.UpdateT(old_timestamp, new_timestamp);
}
void UpdateC(ColumnFamilyId old_column_family_id,
ColumnFamilyId new_column_family_id);
private:
friend class ProtectionInfoKVOT<T>;
ProtectionInfoKVOTC<T>(T val) : kvot_(val) {
static_assert(sizeof(ProtectionInfoKVOTC<T>) == sizeof(T), "");
}
T GetVal() const { return kvot_.GetVal(); }
void SetVal(T val) { kvot_.SetVal(val); }
ProtectionInfoKVOT<T> kvot_;
};
template <typename T>
class ProtectionInfoKVOTS {
public:
ProtectionInfoKVOTS<T>() = default;
ProtectionInfoKVOT<T> StripS(SequenceNumber sequence_number) const;
void UpdateK(const Slice& old_key, const Slice& new_key) {
kvot_.UpdateK(old_key, new_key);
}
void UpdateK(const SliceParts& old_key, const SliceParts& new_key) {
kvot_.UpdateK(old_key, new_key);
}
void UpdateV(const Slice& old_value, const Slice& new_value) {
kvot_.UpdateV(old_value, new_value);
}
void UpdateV(const SliceParts& old_value, const SliceParts& new_value) {
kvot_.UpdateV(old_value, new_value);
}
void UpdateO(ValueType old_op_type, ValueType new_op_type) {
kvot_.UpdateO(old_op_type, new_op_type);
}
void UpdateT(const Slice& old_timestamp, const Slice& new_timestamp) {
kvot_.UpdateT(old_timestamp, new_timestamp);
}
void UpdateS(SequenceNumber old_sequence_number,
SequenceNumber new_sequence_number);
private:
friend class ProtectionInfoKVOT<T>;
ProtectionInfoKVOTS<T>(T val) : kvot_(val) {
static_assert(sizeof(ProtectionInfoKVOTS<T>) == sizeof(T), "");
}
T GetVal() const { return kvot_.GetVal(); }
void SetVal(T val) { kvot_.SetVal(val); }
ProtectionInfoKVOT<T> kvot_;
};
template <typename T>
Status ProtectionInfo<T>::GetStatus() const {
if (val_ != 0) {
return Status::Corruption("ProtectionInfo mismatch");
}
return Status::OK();
}
template <typename T>
ProtectionInfoKVOT<T> ProtectionInfo<T>::ProtectKVOT(
const Slice& key, const Slice& value, ValueType op_type,
const Slice& timestamp) const {
T val = GetVal();
val = val ^ static_cast<T>(GetSliceNPHash64(key, ProtectionInfo<T>::kSeedK));
val =
val ^ static_cast<T>(GetSliceNPHash64(value, ProtectionInfo<T>::kSeedV));
val = val ^
static_cast<T>(NPHash64(reinterpret_cast<char*>(&op_type),
sizeof(op_type), ProtectionInfo<T>::kSeedO));
val = val ^
static_cast<T>(GetSliceNPHash64(timestamp, ProtectionInfo<T>::kSeedT));
return ProtectionInfoKVOT<T>(val);
}
template <typename T>
ProtectionInfoKVOT<T> ProtectionInfo<T>::ProtectKVOT(
const SliceParts& key, const SliceParts& value, ValueType op_type,
const Slice& timestamp) const {
T val = GetVal();
val = val ^
static_cast<T>(GetSlicePartsNPHash64(key, ProtectionInfo<T>::kSeedK));
val = val ^
static_cast<T>(GetSlicePartsNPHash64(value, ProtectionInfo<T>::kSeedV));
val = val ^
static_cast<T>(NPHash64(reinterpret_cast<char*>(&op_type),
sizeof(op_type), ProtectionInfo<T>::kSeedO));
val = val ^
static_cast<T>(GetSliceNPHash64(timestamp, ProtectionInfo<T>::kSeedT));
return ProtectionInfoKVOT<T>(val);
}
template <typename T>
void ProtectionInfoKVOT<T>::UpdateK(const Slice& old_key,
const Slice& new_key) {
T val = GetVal();
val = val ^
static_cast<T>(GetSliceNPHash64(old_key, ProtectionInfo<T>::kSeedK));
val = val ^
static_cast<T>(GetSliceNPHash64(new_key, ProtectionInfo<T>::kSeedK));
SetVal(val);
}
template <typename T>
void ProtectionInfoKVOT<T>::UpdateK(const SliceParts& old_key,
const SliceParts& new_key) {
T val = GetVal();
val = val ^ static_cast<T>(
GetSlicePartsNPHash64(old_key, ProtectionInfo<T>::kSeedK));
val = val ^ static_cast<T>(
GetSlicePartsNPHash64(new_key, ProtectionInfo<T>::kSeedK));
SetVal(val);
}
template <typename T>
void ProtectionInfoKVOT<T>::UpdateV(const Slice& old_value,
const Slice& new_value) {
T val = GetVal();
val = val ^
static_cast<T>(GetSliceNPHash64(old_value, ProtectionInfo<T>::kSeedV));
val = val ^
static_cast<T>(GetSliceNPHash64(new_value, ProtectionInfo<T>::kSeedV));
SetVal(val);
}
template <typename T>
void ProtectionInfoKVOT<T>::UpdateV(const SliceParts& old_value,
const SliceParts& new_value) {
T val = GetVal();
val = val ^ static_cast<T>(
GetSlicePartsNPHash64(old_value, ProtectionInfo<T>::kSeedV));
val = val ^ static_cast<T>(
GetSlicePartsNPHash64(new_value, ProtectionInfo<T>::kSeedV));
SetVal(val);
}
template <typename T>
void ProtectionInfoKVOT<T>::UpdateO(ValueType old_op_type,
ValueType new_op_type) {
T val = GetVal();
val = val ^ static_cast<T>(NPHash64(reinterpret_cast<char*>(&old_op_type),
sizeof(old_op_type),
ProtectionInfo<T>::kSeedO));
val = val ^ static_cast<T>(NPHash64(reinterpret_cast<char*>(&new_op_type),
sizeof(new_op_type),
ProtectionInfo<T>::kSeedO));
SetVal(val);
}
template <typename T>
void ProtectionInfoKVOT<T>::UpdateT(const Slice& old_timestamp,
const Slice& new_timestamp) {
T val = GetVal();
val = val ^ static_cast<T>(
GetSliceNPHash64(old_timestamp, ProtectionInfo<T>::kSeedT));
val = val ^ static_cast<T>(
GetSliceNPHash64(new_timestamp, ProtectionInfo<T>::kSeedT));
SetVal(val);
}
template <typename T>
ProtectionInfo<T> ProtectionInfoKVOT<T>::StripKVOT(
const Slice& key, const Slice& value, ValueType op_type,
const Slice& timestamp) const {
T val = GetVal();
val = val ^ static_cast<T>(GetSliceNPHash64(key, ProtectionInfo<T>::kSeedK));
val =
val ^ static_cast<T>(GetSliceNPHash64(value, ProtectionInfo<T>::kSeedV));
val = val ^
static_cast<T>(NPHash64(reinterpret_cast<char*>(&op_type),
sizeof(op_type), ProtectionInfo<T>::kSeedO));
val = val ^
static_cast<T>(GetSliceNPHash64(timestamp, ProtectionInfo<T>::kSeedT));
return ProtectionInfo<T>(val);
}
template <typename T>
ProtectionInfo<T> ProtectionInfoKVOT<T>::StripKVOT(
const SliceParts& key, const SliceParts& value, ValueType op_type,
const Slice& timestamp) const {
T val = GetVal();
val = val ^
static_cast<T>(GetSlicePartsNPHash64(key, ProtectionInfo<T>::kSeedK));
val = val ^
static_cast<T>(GetSlicePartsNPHash64(value, ProtectionInfo<T>::kSeedV));
val = val ^
static_cast<T>(NPHash64(reinterpret_cast<char*>(&op_type),
sizeof(op_type), ProtectionInfo<T>::kSeedO));
val = val ^
static_cast<T>(GetSliceNPHash64(timestamp, ProtectionInfo<T>::kSeedT));
return ProtectionInfo<T>(val);
}
template <typename T>
ProtectionInfoKVOTC<T> ProtectionInfoKVOT<T>::ProtectC(
ColumnFamilyId column_family_id) const {
T val = GetVal();
val = val ^ static_cast<T>(NPHash64(
reinterpret_cast<char*>(&column_family_id),
sizeof(column_family_id), ProtectionInfo<T>::kSeedC));
return ProtectionInfoKVOTC<T>(val);
}
template <typename T>
ProtectionInfoKVOT<T> ProtectionInfoKVOTC<T>::StripC(
ColumnFamilyId column_family_id) const {
T val = GetVal();
val = val ^ static_cast<T>(NPHash64(
reinterpret_cast<char*>(&column_family_id),
sizeof(column_family_id), ProtectionInfo<T>::kSeedC));
return ProtectionInfoKVOT<T>(val);
}
template <typename T>
void ProtectionInfoKVOTC<T>::UpdateC(ColumnFamilyId old_column_family_id,
ColumnFamilyId new_column_family_id) {
T val = GetVal();
val = val ^ static_cast<T>(NPHash64(
reinterpret_cast<char*>(&old_column_family_id),
sizeof(old_column_family_id), ProtectionInfo<T>::kSeedC));
val = val ^ static_cast<T>(NPHash64(
reinterpret_cast<char*>(&new_column_family_id),
sizeof(new_column_family_id), ProtectionInfo<T>::kSeedC));
SetVal(val);
}
template <typename T>
ProtectionInfoKVOTS<T> ProtectionInfoKVOT<T>::ProtectS(
SequenceNumber sequence_number) const {
T val = GetVal();
val = val ^ static_cast<T>(NPHash64(reinterpret_cast<char*>(&sequence_number),
sizeof(sequence_number),
ProtectionInfo<T>::kSeedS));
return ProtectionInfoKVOTS<T>(val);
}
template <typename T>
ProtectionInfoKVOT<T> ProtectionInfoKVOTS<T>::StripS(
SequenceNumber sequence_number) const {
T val = GetVal();
val = val ^ static_cast<T>(NPHash64(reinterpret_cast<char*>(&sequence_number),
sizeof(sequence_number),
ProtectionInfo<T>::kSeedS));
return ProtectionInfoKVOT<T>(val);
}
template <typename T>
void ProtectionInfoKVOTS<T>::UpdateS(SequenceNumber old_sequence_number,
SequenceNumber new_sequence_number) {
T val = GetVal();
val = val ^ static_cast<T>(NPHash64(
reinterpret_cast<char*>(&old_sequence_number),
sizeof(old_sequence_number), ProtectionInfo<T>::kSeedS));
val = val ^ static_cast<T>(NPHash64(
reinterpret_cast<char*>(&new_sequence_number),
sizeof(new_sequence_number), ProtectionInfo<T>::kSeedS));
SetVal(val);
}
} // namespace ROCKSDB_NAMESPACE