forked from hyperledger/fabric
/
distributor.go
188 lines (167 loc) · 6.29 KB
/
distributor.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
/*
Copyright IBM Corp. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package privdata
import (
"fmt"
"sync"
"sync/atomic"
"github.com/hyperledger/fabric/core/common/privdata"
"github.com/hyperledger/fabric/gossip/api"
gossipCommon "github.com/hyperledger/fabric/gossip/common"
"github.com/hyperledger/fabric/gossip/discovery"
"github.com/hyperledger/fabric/gossip/filter"
gossip2 "github.com/hyperledger/fabric/gossip/gossip"
"github.com/hyperledger/fabric/gossip/util"
"github.com/hyperledger/fabric/protos/common"
proto "github.com/hyperledger/fabric/protos/gossip"
"github.com/hyperledger/fabric/protos/ledger/rwset"
"github.com/pkg/errors"
"github.com/spf13/viper"
)
// gossipAdapter an adapter for API's required from gossip module
type gossipAdapter interface {
// SendByCriteria sends a given message to all peers that match the given SendCriteria
SendByCriteria(message *proto.SignedGossipMessage, criteria gossip2.SendCriteria) error
// PeerFilter receives a SubChannelSelectionCriteria and returns a RoutingFilter that selects
// only peer identities that match the given criteria, and that they published their channel participation
PeerFilter(channel gossipCommon.ChainID, messagePredicate api.SubChannelSelectionCriteria) (filter.RoutingFilter, error)
}
// PvtDataDistributor interface to defines API of distributing private data
type PvtDataDistributor interface {
// Distribute broadcast reliably private data read write set based on policies
Distribute(txID string, privData *rwset.TxPvtReadWriteSet, cs privdata.CollectionStore) error
}
// distributorImpl the implementation of the private data distributor interface
type distributorImpl struct {
chainID string
gossipAdapter
}
// NewDistributor a constructor for private data distributor capable to send
// private read write sets for underlying collection
func NewDistributor(chainID string, gossip gossipAdapter) PvtDataDistributor {
return &distributorImpl{
chainID: chainID,
gossipAdapter: gossip,
}
}
// Distribute broadcast reliably private data read write set based on policies
func (d *distributorImpl) Distribute(txID string, privData *rwset.TxPvtReadWriteSet, cs privdata.CollectionStore) error {
disseminationPlan, err := d.computeDisseminationPlan(txID, privData, cs)
if err != nil {
return errors.WithStack(err)
}
return d.disseminate(disseminationPlan)
}
type dissemination struct {
msg *proto.SignedGossipMessage
criteria gossip2.SendCriteria
}
func (d *distributorImpl) computeDisseminationPlan(txID string, privData *rwset.TxPvtReadWriteSet, cs privdata.CollectionStore) ([]*dissemination, error) {
var disseminationPlan []*dissemination
for _, pvtRwset := range privData.NsPvtRwset {
namespace := pvtRwset.Namespace
for _, collection := range pvtRwset.CollectionPvtRwset {
collectionName := collection.CollectionName
cc := common.CollectionCriteria{
Namespace: namespace,
Collection: collectionName,
TxId: txID,
Channel: d.chainID,
}
colAP, err := cs.RetrieveCollectionAccessPolicy(cc)
if err != nil {
logger.Error("Could not find collection access policy for", cc, "error", err)
return nil, errors.WithMessage(err, fmt.Sprintf("collection access policy for %v not found", cc))
}
colFilter := colAP.AccessFilter()
if colFilter == nil {
logger.Error("Collection access policy for", cc, "has no filter")
return nil, errors.Errorf("No collection access policy filter computed for %v", cc)
}
pvtDataMsg, err := d.createPrivateDataMessage(txID, namespace, collection.CollectionName, collection.Rwset)
if err != nil {
return nil, errors.WithStack(err)
}
dPlan, err := d.disseminationPlanForMsg(colAP, colFilter, pvtDataMsg)
if err != nil {
return nil, errors.WithStack(err)
}
disseminationPlan = append(disseminationPlan, dPlan...)
}
}
return disseminationPlan, nil
}
func (d *distributorImpl) disseminationPlanForMsg(colAP privdata.CollectionAccessPolicy, colFilter privdata.Filter, pvtDataMsg *proto.SignedGossipMessage) ([]*dissemination, error) {
var disseminationPlan []*dissemination
routingFilter, err := d.gossipAdapter.PeerFilter(gossipCommon.ChainID(d.chainID), func(signature api.PeerSignature) bool {
return colFilter(common.SignedData{
Data: signature.Message,
Signature: signature.Signature,
Identity: []byte(signature.PeerIdentity),
})
})
if err != nil {
logger.Error("Failed to retrieve peer routing filter for channel", d.chainID, ":", err)
return nil, err
}
sc := gossip2.SendCriteria{
Timeout: viper.GetDuration("peer.gossip.pvtData.pushAckTimeout"),
Channel: gossipCommon.ChainID(d.chainID),
MaxPeers: colAP.MaximumPeerCount(),
MinAck: colAP.RequiredPeerCount(),
IsEligible: func(member discovery.NetworkMember) bool {
return routingFilter(member)
},
}
disseminationPlan = append(disseminationPlan, &dissemination{
criteria: sc,
msg: pvtDataMsg,
})
return disseminationPlan, nil
}
func (d *distributorImpl) disseminate(disseminationPlan []*dissemination) error {
var failures uint32
var wg sync.WaitGroup
wg.Add(len(disseminationPlan))
for _, dis := range disseminationPlan {
go func(dis *dissemination) {
defer wg.Done()
err := d.SendByCriteria(dis.msg, dis.criteria)
if err != nil {
atomic.AddUint32(&failures, 1)
m := dis.msg.GetPrivateData().Payload
logger.Error("Failed disseminating private RWSet for TxID", m.TxId, ", namespace", m.Namespace, "collection", m.CollectionName, ":", err)
}
}(dis)
}
wg.Wait()
failureCount := atomic.LoadUint32(&failures)
if failureCount != 0 {
return errors.Errorf("Failed disseminating %d out of %d private RWSets", failureCount, len(disseminationPlan))
}
return nil
}
func (d *distributorImpl) createPrivateDataMessage(txID, namespace, collectionName string, rwset []byte) (*proto.SignedGossipMessage, error) {
msg := &proto.GossipMessage{
Channel: []byte(d.chainID),
Nonce: util.RandomUInt64(),
Tag: proto.GossipMessage_CHAN_ONLY,
Content: &proto.GossipMessage_PrivateData{
PrivateData: &proto.PrivateDataMessage{
Payload: &proto.PrivatePayload{
Namespace: namespace,
CollectionName: collectionName,
TxId: txID,
PrivateRwset: rwset,
},
},
},
}
pvtDataMsg, err := msg.NoopSign()
if err != nil {
return nil, err
}
return pvtDataMsg, nil
}