add resource manager Net(Set)Limit api

api/api_net.go

@@ -52,7 +52,9 @@ type Net interface {
 	NetBlockList(ctx context.Context) (NetBlockList, error)     //perm:read
 
 	// ResourceManager API
-	NetStat(ctx context.Context, scope string) (NetStat, error) //perm:read
+	NetStat(ctx context.Context, scope string) (NetStat, error)          //perm:read
+	NetLimit(ctx context.Context, scope string) (NetLimit, error)        //perm:read
+	NetSetLimit(ctx context.Context, scope string, limit NetLimit) error //perm:admin
 
 	// ID returns peerID of libp2p node backing this API
 	ID(context.Context) (peer.ID, error) //perm:read

api/types.go

@@ -135,7 +135,21 @@ type NetStat struct {
 	Transient *network.ScopeStat           `json:",omitempty"`
 	Services  map[string]network.ScopeStat `json:",omitempty"`
 	Protocols map[string]network.ScopeStat `json:",omitempty"`
-	Peers     map[string]network.ScopeStat
+	Peers     map[string]network.ScopeStat `json:",omitempty"`
+}
+
+type NetLimit struct {
+	Dynamic bool `json:",omitempty"`
+	// set if Dynamic is false
+	Memory int64 `json:",omitempty"`
+	// set if Dynamic is true
+	MemoryFraction float64 `json:",omitempty"`
+	MinMemory      int64   `json:",omitempty"`
+	MaxMemory      int64   `json:",omitempty"`
+
+	Streams, StreamsInbound, StreamsOutbound int
+	Conns, ConnsInbound, ConnsOutbound       int
+	FD                                       int
 }
 
 type ExtendedPeerInfo struct {

node/impl/net/rcmgr.go

@@ -85,7 +85,7 @@ func (a *NetAPI) NetStat(ctx context.Context, scope string) (result api.NetStat,
 		p := scope[5:]
 		pid, err := peer.IDFromString(p)
 		if err != nil {
-			return result, err
+			return result, xerrors.Errorf("invalid peer ID: %s: %w", p, err)
 		}
 		err = a.ResourceManager.ViewPeer(pid, func(s network.PeerScope) error {
 			stat := s.Stat()
@@ -100,3 +100,172 @@ func (a *NetAPI) NetStat(ctx context.Context, scope string) (result api.NetStat,
 		return result, xerrors.Errorf("invalid scope %s", scope)
 	}
 }
+
+func (a *NetAPI) NetLimit(ctx context.Context, scope string) (result api.NetLimit, err error) {
+	getLimit := func(s network.ResourceScope) error {
+		limiter, ok := s.(rcmgr.ResourceScopeLimiter)
+		if !ok {
+			return xerrors.Errorf("resource scope doesn't implement ResourceScopeLimiter interface")
+		}
+
+		limit := limiter.Limit()
+		switch l := limit.(type) {
+		case *rcmgr.StaticLimit:
+			result.Memory = l.Memory
+			result.Streams = l.BaseLimit.Streams
+			result.StreamsInbound = l.BaseLimit.StreamsInbound
+			result.StreamsOutbound = l.BaseLimit.StreamsOutbound
+			result.Conns = l.BaseLimit.Conns
+			result.ConnsInbound = l.BaseLimit.ConnsInbound
+			result.ConnsOutbound = l.BaseLimit.ConnsOutbound
+			result.FD = l.BaseLimit.FD
+
+		case *rcmgr.DynamicLimit:
+			result.Dynamic = true
+			result.MemoryFraction = l.MemoryLimit.MemoryFraction
+			result.MinMemory = l.MemoryLimit.MinMemory
+			result.MaxMemory = l.MemoryLimit.MaxMemory
+			result.Streams = l.BaseLimit.Streams
+			result.StreamsInbound = l.BaseLimit.StreamsInbound
+			result.StreamsOutbound = l.BaseLimit.StreamsOutbound
+			result.Conns = l.BaseLimit.Conns
+			result.ConnsInbound = l.BaseLimit.ConnsInbound
+			result.ConnsOutbound = l.BaseLimit.ConnsOutbound
+			result.FD = l.BaseLimit.FD
+
+		default:
+			return xerrors.Errorf("unknown limit type %T", limit)
+		}
+
+		return nil
+	}
+
+	switch {
+	case scope == "system":
+		err = a.ResourceManager.ViewSystem(func(s network.ResourceScope) error {
+			return getLimit(s)
+		})
+		return result, err
+
+	case scope == "transient":
+		err = a.ResourceManager.ViewTransient(func(s network.ResourceScope) error {
+			return getLimit(s)
+		})
+		return result, err
+
+	case strings.HasPrefix(scope, "svc:"):
+		svc := scope[4:]
+		err = a.ResourceManager.ViewService(svc, func(s network.ServiceScope) error {
+			return getLimit(s)
+		})
+		return result, err
+
+	case strings.HasPrefix(scope, "proto:"):
+		proto := scope[6:]
+		err = a.ResourceManager.ViewProtocol(protocol.ID(proto), func(s network.ProtocolScope) error {
+			return getLimit(s)
+		})
+		return result, err
+
+	case strings.HasPrefix(scope, "peer:"):
+		p := scope[5:]
+		pid, err := peer.IDFromString(p)
+		if err != nil {
+			return result, xerrors.Errorf("invalid peer ID: %s: %w", p, err)
+		}
+		err = a.ResourceManager.ViewPeer(pid, func(s network.PeerScope) error {
+			return getLimit(s)
+		})
+		return result, err
+
+	default:
+		return result, xerrors.Errorf("invalid scope %s", scope)
+	}
+}
+
+func (a *NetAPI) NetSetLimit(ctx context.Context, scope string, limit api.NetLimit) error {
+	setLimit := func(s network.ResourceScope) error {
+		limiter, ok := s.(rcmgr.ResourceScopeLimiter)
+		if !ok {
+			return xerrors.Errorf("resource scope doesn't implement ResourceScopeLimiter interface")
+		}
+
+		var newLimit rcmgr.Limit
+		if limit.Dynamic {
+			newLimit = &rcmgr.DynamicLimit{
+				MemoryLimit: rcmgr.MemoryLimit{
+					MemoryFraction: limit.MemoryFraction,
+					MinMemory:      limit.MinMemory,
+					MaxMemory:      limit.MaxMemory,
+				},
+				BaseLimit: rcmgr.BaseLimit{
+					Streams:         limit.Streams,
+					StreamsInbound:  limit.StreamsInbound,
+					StreamsOutbound: limit.StreamsOutbound,
+					Conns:           limit.Conns,
+					ConnsInbound:    limit.ConnsInbound,
+					ConnsOutbound:   limit.ConnsOutbound,
+					FD:              limit.FD,
+				},
+			}
+		} else {
+			newLimit = &rcmgr.StaticLimit{
+				Memory: limit.Memory,
+				BaseLimit: rcmgr.BaseLimit{
+					Streams:         limit.Streams,
+					StreamsInbound:  limit.StreamsInbound,
+					StreamsOutbound: limit.StreamsOutbound,
+					Conns:           limit.Conns,
+					ConnsInbound:    limit.ConnsInbound,
+					ConnsOutbound:   limit.ConnsOutbound,
+					FD:              limit.FD,
+				},
+			}
+		}
+
+		limiter.SetLimit(newLimit)
+		return nil
+	}
+
+	switch {
+	case scope == "system":
+		err := a.ResourceManager.ViewSystem(func(s network.ResourceScope) error {
+			return setLimit(s)
+		})
+		return err
+
+	case scope == "transient":
+		err := a.ResourceManager.ViewTransient(func(s network.ResourceScope) error {
+			return setLimit(s)
+		})
+		return err
+
+	case strings.HasPrefix(scope, "svc:"):
+		svc := scope[4:]
+		err := a.ResourceManager.ViewService(svc, func(s network.ServiceScope) error {
+			return setLimit(s)
+		})
+		return err
+
+	case strings.HasPrefix(scope, "proto:"):
+		proto := scope[6:]
+		err := a.ResourceManager.ViewProtocol(protocol.ID(proto), func(s network.ProtocolScope) error {
+			return setLimit(s)
+		})
+		return err
+
+	case strings.HasPrefix(scope, "peer:"):
+		p := scope[5:]
+		pid, err := peer.IDFromString(p)
+		if err != nil {
+			return xerrors.Errorf("invalid peer ID: %s: %w", p, err)
+		}
+		err = a.ResourceManager.ViewPeer(pid, func(s network.PeerScope) error {
+			return setLimit(s)
+		})
+		return err
+
+	default:
+		return xerrors.Errorf("invalid scope %s", scope)
+	}
+}