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core, trie, eth, cmd: rework preimage store (ethereum#25287)
* core, trie, eth, cmd: rework preimage store * trie: address comment
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| // Copyright 2022 The go-ethereum Authors | ||
| // This file is part of the go-ethereum library. | ||
| // | ||
| // The go-ethereum library is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU Lesser General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // The go-ethereum library is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU Lesser General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU Lesser General Public License | ||
| // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. | ||
|
|
||
| package trie | ||
|
|
||
| import ( | ||
| "sync" | ||
|
|
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| "github.com/ethereum/go-ethereum/common" | ||
| "github.com/ethereum/go-ethereum/core/rawdb" | ||
| "github.com/ethereum/go-ethereum/ethdb" | ||
| ) | ||
|
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| // preimageStore is the store for caching preimages of node key. | ||
| type preimageStore struct { | ||
| lock sync.RWMutex | ||
| disk ethdb.KeyValueStore | ||
| preimages map[common.Hash][]byte // Preimages of nodes from the secure trie | ||
| preimagesSize common.StorageSize // Storage size of the preimages cache | ||
| } | ||
|
|
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| // newPreimageStore initializes the store for caching preimages. | ||
| func newPreimageStore(disk ethdb.KeyValueStore) *preimageStore { | ||
| return &preimageStore{ | ||
| disk: disk, | ||
| preimages: make(map[common.Hash][]byte), | ||
| } | ||
| } | ||
|
|
||
| // insertPreimage writes a new trie node pre-image to the memory database if it's | ||
| // yet unknown. The method will NOT make a copy of the slice, only use if the | ||
| // preimage will NOT be changed later on. | ||
| func (store *preimageStore) insertPreimage(preimages map[common.Hash][]byte) { | ||
| store.lock.Lock() | ||
| defer store.lock.Unlock() | ||
|
|
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| for hash, preimage := range preimages { | ||
| if _, ok := store.preimages[hash]; ok { | ||
| continue | ||
| } | ||
| store.preimages[hash] = preimage | ||
| store.preimagesSize += common.StorageSize(common.HashLength + len(preimage)) | ||
| } | ||
| } | ||
|
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| // preimage retrieves a cached trie node pre-image from memory. If it cannot be | ||
| // found cached, the method queries the persistent database for the content. | ||
| func (store *preimageStore) preimage(hash common.Hash) []byte { | ||
| store.lock.RLock() | ||
| preimage := store.preimages[hash] | ||
| store.lock.RUnlock() | ||
|
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||
| if preimage != nil { | ||
| return preimage | ||
| } | ||
| return rawdb.ReadPreimage(store.disk, hash) | ||
| } | ||
|
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| // commit flushes the cached preimages into the disk. | ||
| func (store *preimageStore) commit(force bool) error { | ||
| store.lock.Lock() | ||
| defer store.lock.Unlock() | ||
|
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| if store.preimagesSize <= 4*1024*1024 && !force { | ||
| return nil | ||
| } | ||
| batch := store.disk.NewBatch() | ||
| rawdb.WritePreimages(batch, store.preimages) | ||
| if err := batch.Write(); err != nil { | ||
| return err | ||
| } | ||
| store.preimages, store.preimagesSize = make(map[common.Hash][]byte), 0 | ||
| return nil | ||
| } | ||
|
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| // size returns the current storage size of accumulated preimages. | ||
| func (store *preimageStore) size() common.StorageSize { | ||
| store.lock.RLock() | ||
| defer store.lock.RUnlock() | ||
|
|
||
| return store.preimagesSize | ||
| } |
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