frostfs-node/pkg/services/tree/service.go

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package tree
import (
"bytes"
"context"
"errors"
"fmt"
"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/pilorama"
cidSDK "github.com/nspcc-dev/neofs-sdk-go/container/id"
"github.com/nspcc-dev/neofs-sdk-go/eacl"
netmapSDK "github.com/nspcc-dev/neofs-sdk-go/netmap"
"go.uber.org/zap"
)
// Service represents tree-service capable of working with multiple
// instances of CRDT trees.
type Service struct {
cfg
cache clientCache
replicateCh chan movePair
replicationTasks chan replicationTask
closeCh chan struct{}
containerCache containerCache
}
// MaxGetSubTreeDepth represents maximum allowed traversal depth in GetSubTree RPC.
const MaxGetSubTreeDepth = 10
var _ TreeServiceServer = (*Service)(nil)
// New creates new tree service instance.
func New(opts ...Option) *Service {
var s Service
s.containerCacheSize = defaultContainerCacheSize
s.replicatorChannelCapacity = defaultReplicatorCapacity
s.replicatorWorkerCount = defaultReplicatorWorkerCount
for i := range opts {
opts[i](&s.cfg)
}
if s.log == nil {
s.log = zap.NewNop()
}
s.cache.init()
s.closeCh = make(chan struct{})
s.replicateCh = make(chan movePair, s.replicatorChannelCapacity)
s.replicationTasks = make(chan replicationTask, s.replicatorWorkerCount)
s.containerCache.init(s.containerCacheSize)
return &s
}
// Start starts the service.
func (s *Service) Start(ctx context.Context) {
go s.replicateLoop(ctx)
}
// Shutdown shutdowns the service.
func (s *Service) Shutdown() {
close(s.closeCh)
}
func (s *Service) Add(ctx context.Context, req *AddRequest) (*AddResponse, error) {
b := req.GetBody()
var cid cidSDK.ID
if err := cid.Decode(b.GetContainerId()); err != nil {
return nil, err
}
err := s.verifyClient(req, cid, b.GetBearerToken(), eacl.OperationPut)
if err != nil {
return nil, err
}
ns, pos, err := s.getContainerNodes(cid)
if err != nil {
return nil, err
}
if pos < 0 {
var resp *AddResponse
var outErr error
err = s.forEachNode(ctx, ns, func(c TreeServiceClient) bool {
resp, outErr = c.Add(ctx, req)
return true
})
if err != nil {
return nil, err
}
return resp, outErr
}
d := pilorama.CIDDescriptor{CID: cid, Position: pos, Size: len(ns)}
log, err := s.forest.TreeMove(d, b.GetTreeId(), &pilorama.Move{
Parent: b.GetParentId(),
Child: pilorama.RootID,
Meta: pilorama.Meta{Items: protoToMeta(b.GetMeta())},
})
if err != nil {
return nil, err
}
s.pushToQueue(cid, b.GetTreeId(), log)
return &AddResponse{
Body: &AddResponse_Body{
NodeId: log.Child,
},
}, nil
}
func (s *Service) AddByPath(ctx context.Context, req *AddByPathRequest) (*AddByPathResponse, error) {
b := req.GetBody()
var cid cidSDK.ID
if err := cid.Decode(b.GetContainerId()); err != nil {
return nil, err
}
err := s.verifyClient(req, cid, b.GetBearerToken(), eacl.OperationPut)
if err != nil {
return nil, err
}
ns, pos, err := s.getContainerNodes(cid)
if err != nil {
return nil, err
}
if pos < 0 {
var resp *AddByPathResponse
var outErr error
err = s.forEachNode(ctx, ns, func(c TreeServiceClient) bool {
resp, outErr = c.AddByPath(ctx, req)
return true
})
if err != nil {
return nil, err
}
return resp, outErr
}
meta := protoToMeta(b.GetMeta())
attr := b.GetPathAttribute()
if len(attr) == 0 {
attr = pilorama.AttributeFilename
}
d := pilorama.CIDDescriptor{CID: cid, Position: pos, Size: len(ns)}
logs, err := s.forest.TreeAddByPath(d, b.GetTreeId(), attr, b.GetPath(), meta)
if err != nil {
return nil, err
}
for i := range logs {
s.pushToQueue(cid, b.GetTreeId(), &logs[i])
}
nodes := make([]uint64, len(logs))
nodes[0] = logs[len(logs)-1].Child
for i, l := range logs[:len(logs)-1] {
nodes[i+1] = l.Child
}
return &AddByPathResponse{
Body: &AddByPathResponse_Body{
Nodes: nodes,
},
}, nil
}
func (s *Service) Remove(ctx context.Context, req *RemoveRequest) (*RemoveResponse, error) {
b := req.GetBody()
var cid cidSDK.ID
if err := cid.Decode(b.GetContainerId()); err != nil {
return nil, err
}
err := s.verifyClient(req, cid, b.GetBearerToken(), eacl.OperationPut)
if err != nil {
return nil, err
}
ns, pos, err := s.getContainerNodes(cid)
if err != nil {
return nil, err
}
if pos < 0 {
var resp *RemoveResponse
var outErr error
err = s.forEachNode(ctx, ns, func(c TreeServiceClient) bool {
resp, outErr = c.Remove(ctx, req)
return true
})
if err != nil {
return nil, err
}
return resp, outErr
}
if b.GetNodeId() == pilorama.RootID {
return nil, fmt.Errorf("node with ID %d is root and can't be removed", b.GetNodeId())
}
d := pilorama.CIDDescriptor{CID: cid, Position: pos, Size: len(ns)}
log, err := s.forest.TreeMove(d, b.GetTreeId(), &pilorama.Move{
Parent: pilorama.TrashID,
Child: b.GetNodeId(),
})
if err != nil {
return nil, err
}
s.pushToQueue(cid, b.GetTreeId(), log)
return new(RemoveResponse), nil
}
// Move applies client operation to the specified tree and pushes in queue
// for replication on other nodes.
func (s *Service) Move(ctx context.Context, req *MoveRequest) (*MoveResponse, error) {
b := req.GetBody()
var cid cidSDK.ID
if err := cid.Decode(b.GetContainerId()); err != nil {
return nil, err
}
err := s.verifyClient(req, cid, b.GetBearerToken(), eacl.OperationPut)
if err != nil {
return nil, err
}
ns, pos, err := s.getContainerNodes(cid)
if err != nil {
return nil, err
}
if pos < 0 {
var resp *MoveResponse
var outErr error
err = s.forEachNode(ctx, ns, func(c TreeServiceClient) bool {
resp, outErr = c.Move(ctx, req)
return true
})
if err != nil {
return nil, err
}
return resp, outErr
}
if b.GetNodeId() == pilorama.RootID {
return nil, fmt.Errorf("node with ID %d is root and can't be moved", b.GetNodeId())
}
d := pilorama.CIDDescriptor{CID: cid, Position: pos, Size: len(ns)}
log, err := s.forest.TreeMove(d, b.GetTreeId(), &pilorama.Move{
Parent: b.GetParentId(),
Child: b.GetNodeId(),
Meta: pilorama.Meta{Items: protoToMeta(b.GetMeta())},
})
if err != nil {
return nil, err
}
s.pushToQueue(cid, b.GetTreeId(), log)
return new(MoveResponse), nil
}
func (s *Service) GetNodeByPath(ctx context.Context, req *GetNodeByPathRequest) (*GetNodeByPathResponse, error) {
b := req.GetBody()
var cid cidSDK.ID
if err := cid.Decode(b.GetContainerId()); err != nil {
return nil, err
}
err := s.verifyClient(req, cid, b.GetBearerToken(), eacl.OperationGet)
if err != nil {
return nil, err
}
ns, pos, err := s.getContainerNodes(cid)
if err != nil {
return nil, err
}
if pos < 0 {
var resp *GetNodeByPathResponse
var outErr error
err = s.forEachNode(ctx, ns, func(c TreeServiceClient) bool {
resp, outErr = c.GetNodeByPath(ctx, req)
return true
})
if err != nil {
return nil, err
}
return resp, outErr
}
attr := b.GetPathAttribute()
if len(attr) == 0 {
attr = pilorama.AttributeFilename
}
nodes, err := s.forest.TreeGetByPath(cid, b.GetTreeId(), attr, b.GetPath(), b.GetLatestOnly())
if err != nil {
return nil, err
}
info := make([]*GetNodeByPathResponse_Info, 0, len(nodes))
for _, node := range nodes {
m, _, err := s.forest.TreeGetMeta(cid, b.GetTreeId(), node)
if err != nil {
return nil, err
}
var x GetNodeByPathResponse_Info
x.NodeId = node
x.Timestamp = m.Time
if b.AllAttributes {
x.Meta = metaToProto(m.Items)
} else {
for _, kv := range m.Items {
for _, attr := range b.GetAttributes() {
if kv.Key == attr {
x.Meta = append(x.Meta, &KeyValue{
Key: kv.Key,
Value: kv.Value,
})
break
}
}
}
}
info = append(info, &x)
}
return &GetNodeByPathResponse{
Body: &GetNodeByPathResponse_Body{
Nodes: info,
},
}, nil
}
func (s *Service) GetSubTree(req *GetSubTreeRequest, srv TreeService_GetSubTreeServer) error {
b := req.GetBody()
var cid cidSDK.ID
if err := cid.Decode(b.GetContainerId()); err != nil {
return err
}
err := s.verifyClient(req, cid, b.GetBearerToken(), eacl.OperationGet)
if err != nil {
return err
}
ns, pos, err := s.getContainerNodes(cid)
if err != nil {
return err
}
if pos < 0 {
var cli TreeService_GetSubTreeClient
var outErr error
err = s.forEachNode(srv.Context(), ns, func(c TreeServiceClient) bool {
cli, outErr = c.GetSubTree(srv.Context(), req)
return true
})
if err != nil {
return err
} else if outErr != nil {
return outErr
}
for resp, err := cli.Recv(); err == nil; resp, err = cli.Recv() {
if err := srv.Send(resp); err != nil {
return err
}
}
return nil
}
return getSubTree(srv, cid, b, s.forest)
}
func getSubTree(srv TreeService_GetSubTreeServer, cid cidSDK.ID, b *GetSubTreeRequest_Body, forest pilorama.Forest) error {
// Traverse the tree in a DFS manner. Because we need to support arbitrary depth,
// recursive implementation is not suitable here, so we maintain explicit stack.
stack := [][]uint64{{b.GetRootId()}}
for {
if len(stack) == 0 {
break
} else if len(stack[len(stack)-1]) == 0 {
stack = stack[:len(stack)-1]
continue
}
nodeID := stack[len(stack)-1][0]
stack[len(stack)-1] = stack[len(stack)-1][1:]
m, p, err := forest.TreeGetMeta(cid, b.GetTreeId(), nodeID)
if err != nil {
return err
}
err = srv.Send(&GetSubTreeResponse{
Body: &GetSubTreeResponse_Body{
NodeId: nodeID,
ParentId: p,
Timestamp: m.Time,
Meta: metaToProto(m.Items),
},
})
if err != nil {
return err
}
if b.GetDepth() == 0 || uint32(len(stack)) < b.GetDepth() {
children, err := forest.TreeGetChildren(cid, b.GetTreeId(), nodeID)
if err != nil {
return err
}
if len(children) != 0 {
stack = append(stack, children)
}
}
}
return nil
}
// Apply locally applies operation from the remote node to the tree.
func (s *Service) Apply(_ context.Context, req *ApplyRequest) (*ApplyResponse, error) {
err := verifyMessage(req)
if err != nil {
return nil, err
}
var cid cidSDK.ID
if err := cid.Decode(req.GetBody().GetContainerId()); err != nil {
return nil, err
}
key := req.GetSignature().GetKey()
_, pos, size, err := s.getContainerInfo(cid, key)
if err != nil {
return nil, err
}
if pos < 0 {
return nil, errors.New("`Apply` request must be signed by a container node")
}
op := req.GetBody().GetOperation()
var meta pilorama.Meta
if err := meta.FromBytes(op.GetMeta()); err != nil {
return nil, fmt.Errorf("can't parse meta-information: %w", err)
}
d := pilorama.CIDDescriptor{CID: cid, Position: pos, Size: size}
resp := &ApplyResponse{Body: &ApplyResponse_Body{}, Signature: &Signature{}}
return resp, s.forest.TreeApply(d, req.GetBody().GetTreeId(), &pilorama.Move{
Parent: op.GetParentId(),
Child: op.GetChildId(),
Meta: meta,
})
}
func (s *Service) GetOpLog(req *GetOpLogRequest, srv TreeService_GetOpLogServer) error {
b := req.GetBody()
var cid cidSDK.ID
if err := cid.Decode(req.GetBody().GetContainerId()); err != nil {
return err
}
ns, pos, err := s.getContainerNodes(cid)
if err != nil {
return err
}
if pos < 0 {
var cli TreeService_GetOpLogClient
var outErr error
err := s.forEachNode(srv.Context(), ns, func(c TreeServiceClient) bool {
cli, outErr = c.GetOpLog(srv.Context(), req)
return true
})
if err != nil {
return err
} else if outErr != nil {
return outErr
}
for resp, err := cli.Recv(); err == nil; resp, err = cli.Recv() {
if err := srv.Send(resp); err != nil {
return err
}
}
return nil
}
h := b.GetHeight()
for {
lm, err := s.forest.TreeGetOpLog(cid, b.GetTreeId(), h)
if err != nil || lm.Time == 0 {
return err
}
err = srv.Send(&GetOpLogResponse{
Body: &GetOpLogResponse_Body{
Operation: &LogMove{
ParentId: lm.Parent,
Meta: lm.Meta.Bytes(),
ChildId: lm.Child,
},
},
})
if err != nil {
return err
}
h = lm.Time + 1
}
}
func protoToMeta(arr []*KeyValue) []pilorama.KeyValue {
meta := make([]pilorama.KeyValue, len(arr))
for i, kv := range arr {
if kv != nil {
meta[i].Key = kv.Key
meta[i].Value = kv.Value
}
}
return meta
}
func metaToProto(arr []pilorama.KeyValue) []*KeyValue {
meta := make([]*KeyValue, len(arr))
for i, kv := range arr {
meta[i] = &KeyValue{
Key: kv.Key,
Value: kv.Value,
}
}
return meta
}
// getContainerInfo returns the list of container nodes, position in the container for the node
// with pub key and total amount of nodes in all replicas.
func (s *Service) getContainerInfo(cid cidSDK.ID, pub []byte) ([]netmapSDK.NodeInfo, int, int, error) {
cntNodes, _, err := s.getContainerNodes(cid)
if err != nil {
return nil, 0, 0, err
}
for i, node := range cntNodes {
if bytes.Equal(node.PublicKey(), pub) {
return cntNodes, i, len(cntNodes), nil
}
}
return cntNodes, -1, len(cntNodes), nil
}