-
Notifications
You must be signed in to change notification settings - Fork 0
/
disklayer.go
189 lines (164 loc) · 6.58 KB
/
disklayer.go
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
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
// (c) 2019-2020, Ava Labs, Inc.
//
// This file is a derived work, based on the go-ethereum library whose original
// notices appear below.
//
// It is distributed under a license compatible with the licensing terms of the
// original code from which it is derived.
//
// Much love to the original authors for their work.
// **********
// Copyright 2019 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 snapshot
import (
"bytes"
"sync"
"time"
"github.com/VictoriaMetrics/fastcache"
"github.com/lasthyphen/dijethh/core/rawdb"
"github.com/lasthyphen/dijethh/ethdb"
"github.com/lasthyphen/dijethh/trie"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/rlp"
)
// diskLayer is a low level persistent snapshot built on top of a key-value store.
type diskLayer struct {
diskdb ethdb.KeyValueStore // Key-value store containing the base snapshot
triedb *trie.Database // Trie node cache for reconstruction purposes
cache *fastcache.Cache // Cache to avoid hitting the disk for direct access
blockHash common.Hash // Block hash of the base snapshot
root common.Hash // Root hash of the base snapshot
stale bool // Signals that the layer became stale (state progressed)
genMarker []byte // Marker for the state that's indexed during initial layer generation
genPending chan struct{} // Notification channel when generation is done (test synchronicity)
genAbort chan chan struct{} // Notification channel to abort generating the snapshot in this layer
genStats *generatorStats // Stats for snapshot generation (generation aborted/finished if non-nil)
created time.Time // Time at which disk layer was created
logged time.Time // Time at which last logged generation progress
abortStarted time.Time // Time as which disk layer started to be aborted
lock sync.RWMutex
}
// Root returns root hash for which this snapshot was made.
func (dl *diskLayer) Root() common.Hash {
return dl.root
}
// BlockHash returns the block hash for which this snapshot was made
func (dl *diskLayer) BlockHash() common.Hash {
return dl.blockHash
}
// Parent always returns nil as there's no layer below the disk.
func (dl *diskLayer) Parent() snapshot {
return nil
}
// Stale return whether this layer has become stale (was flattened across) or if
// it's still live.
func (dl *diskLayer) Stale() bool {
dl.lock.RLock()
defer dl.lock.RUnlock()
return dl.stale
}
// Account directly retrieves the account associated with a particular hash in
// the snapshot slim data format.
func (dl *diskLayer) Account(hash common.Hash) (*Account, error) {
data, err := dl.AccountRLP(hash)
if err != nil {
return nil, err
}
if len(data) == 0 { // can be both nil and []byte{}
return nil, nil
}
account := new(Account)
if err := rlp.DecodeBytes(data, account); err != nil {
panic(err)
}
return account, nil
}
// AccountRLP directly retrieves the account RLP associated with a particular
// hash in the snapshot slim data format.
func (dl *diskLayer) AccountRLP(hash common.Hash) ([]byte, error) {
dl.lock.RLock()
defer dl.lock.RUnlock()
// If the layer was flattened into, consider it invalid (any live reference to
// the original should be marked as unusable).
if dl.stale {
return nil, ErrSnapshotStale
}
// If the layer is being generated, ensure the requested hash has already been
// covered by the generator.
if dl.genMarker != nil && bytes.Compare(hash[:], dl.genMarker) > 0 {
return nil, ErrNotCoveredYet
}
// If we're in the disk layer, all diff layers missed
snapshotDirtyAccountMissMeter.Mark(1)
// Try to retrieve the account from the memory cache
if blob, found := dl.cache.HasGet(nil, hash[:]); found {
snapshotCleanAccountHitMeter.Mark(1)
snapshotCleanAccountReadMeter.Mark(int64(len(blob)))
return blob, nil
}
// Cache doesn't contain account, pull from disk and cache for later
blob := rawdb.ReadAccountSnapshot(dl.diskdb, hash)
dl.cache.Set(hash[:], blob)
snapshotCleanAccountMissMeter.Mark(1)
if n := len(blob); n > 0 {
snapshotCleanAccountWriteMeter.Mark(int64(n))
} else {
snapshotCleanAccountInexMeter.Mark(1)
}
return blob, nil
}
// Storage directly retrieves the storage data associated with a particular hash,
// within a particular account.
func (dl *diskLayer) Storage(accountHash, storageHash common.Hash) ([]byte, error) {
dl.lock.RLock()
defer dl.lock.RUnlock()
// If the layer was flattened into, consider it invalid (any live reference to
// the original should be marked as unusable).
if dl.stale {
return nil, ErrSnapshotStale
}
key := append(accountHash[:], storageHash[:]...)
// If the layer is being generated, ensure the requested hash has already been
// covered by the generator.
if dl.genMarker != nil && bytes.Compare(key, dl.genMarker) > 0 {
return nil, ErrNotCoveredYet
}
// If we're in the disk layer, all diff layers missed
snapshotDirtyStorageMissMeter.Mark(1)
// Try to retrieve the storage slot from the memory cache
if blob, found := dl.cache.HasGet(nil, key); found {
snapshotCleanStorageHitMeter.Mark(1)
snapshotCleanStorageReadMeter.Mark(int64(len(blob)))
return blob, nil
}
// Cache doesn't contain storage slot, pull from disk and cache for later
blob := rawdb.ReadStorageSnapshot(dl.diskdb, accountHash, storageHash)
dl.cache.Set(key, blob)
snapshotCleanStorageMissMeter.Mark(1)
if n := len(blob); n > 0 {
snapshotCleanStorageWriteMeter.Mark(int64(n))
} else {
snapshotCleanStorageInexMeter.Mark(1)
}
return blob, nil
}
// Update creates a new layer on top of the existing snapshot diff tree with
// the specified data items. Note, the maps are retained by the method to avoid
// copying everything.
func (dl *diskLayer) Update(blockHash, blockRoot common.Hash, destructs map[common.Hash]struct{}, accounts map[common.Hash][]byte, storage map[common.Hash]map[common.Hash][]byte) *diffLayer {
return newDiffLayer(dl, blockHash, blockRoot, destructs, accounts, storage)
}