swarm: Debug API and HasChunks() API endpoint (ethereum#18980)

Author: holisticode

cmd/swarm/main.go

@@ -468,5 +468,5 @@ func setSwarmBootstrapNodes(ctx *cli.Context, cfg *node.Config) {
 		}
 		cfg.P2P.BootstrapNodes = append(cfg.P2P.BootstrapNodes, node)
 	}
-	log.Debug("added default swarm bootnodes", "length", len(cfg.P2P.BootstrapNodes))
+
 }

swarm/api/inspector.go

@@ -0,0 +1,58 @@
+// 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 api
+
+import (
+	"context"
+
+	"github.com/ethereum/go-ethereum/swarm/network"
+	"github.com/ethereum/go-ethereum/swarm/storage"
+)
+
+type Inspector struct {
+	api      *API
+	hive     *network.Hive
+	netStore *storage.NetStore
+}
+
+func NewInspector(api *API, hive *network.Hive, netStore *storage.NetStore) *Inspector {
+	return &Inspector{api, hive, netStore}
+}
+
+// Hive prints the kademlia table
+func (inspector *Inspector) Hive() string {
+	return inspector.hive.String()
+}
+
+type HasInfo struct {
+	Addr string `json:"address"`
+	Has  bool   `json:"has"`
+}
+
+// Has checks whether each chunk address is present in the underlying datastore,
+// the bool in the returned structs indicates if the underlying datastore has
+// the chunk stored with the given address (true), or not (false)
+func (inspector *Inspector) Has(chunkAddresses []storage.Address) []HasInfo {
+	results := make([]HasInfo, 0)
+	for _, addr := range chunkAddresses {
+		res := HasInfo{}
+		res.Addr = addr.String()
+		res.Has = inspector.netStore.Has(context.Background(), addr)
+		results = append(results, res)
+	}
+	return results
+}

swarm/api/testapi.go

@@ -214,6 +214,11 @@ func newRoundRobinStore(stores ...storage.ChunkStore) *roundRobinStore {
 	}
 }
 
+// not used in this context, only to fulfill ChunkStore interface
+func (rrs *roundRobinStore) Has(ctx context.Context, addr storage.Address) bool {
+	panic("RoundRobinStor doesn't support HasChunk")
+}
+
 func (rrs *roundRobinStore) Get(ctx context.Context, addr storage.Address) (storage.Chunk, error) {
 	return nil, errors.New("get not well defined on round robin store")
 }

swarm/network/stream/common_test.go

@@ -267,6 +267,15 @@ func (m *MapChunkStore) Get(_ context.Context, ref Address) (Chunk, error) {
 	return chunk, nil
 }
 
+// Need to implement Has from SyncChunkStore
+func (m *MapChunkStore) Has(ctx context.Context, ref Address) bool {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+
+	_, has := m.chunks[ref.Hex()]
+	return has
+}
+
 func (m *MapChunkStore) Close() {
 }
 

swarm/storage/common_test.go

@@ -969,6 +969,18 @@ func (s *LDBStore) Get(_ context.Context, addr Address) (chunk Chunk, err error)
 	return s.get(addr)
 }
 
+// Has queries the underlying DB if a chunk with the given address is stored
+// Returns true if the chunk is found, false if not
+func (s *LDBStore) Has(_ context.Context, addr Address) bool {
+	s.lock.RLock()
+	defer s.lock.RUnlock()
+
+	ikey := getIndexKey(addr)
+	_, err := s.db.Get(ikey)
+
+	return err == nil
+}
+
 // TODO: To conform with other private methods of this object indices should not be updated
 func (s *LDBStore) get(addr Address) (chunk *chunk, err error) {
 	if s.closed {

swarm/storage/ldbstore.go

@@ -132,6 +132,13 @@ func (ls *LocalStore) Put(ctx context.Context, chunk Chunk) error {
 	return err
 }
 
+// Has queries the underlying DbStore if a chunk with the given address
+// is being stored there.
+// Returns true if it is stored, false if not
+func (ls *LocalStore) Has(ctx context.Context, addr Address) bool {
+	return ls.DbStore.Has(ctx, addr)
+}
+
 // Get(chunk *Chunk) looks up a chunk in the local stores
 // This method is blocking until the chunk is retrieved
 // so additional timeout may be needed to wrap this call if

swarm/storage/localstore.go

@@ -209,3 +209,36 @@ func setupLocalStore(t *testing.T, ldbCap int) (ls *LocalStore, cleanup func())
 
 	return store, cleanup
 }
+
+func TestHas(t *testing.T) {
+	ldbCap := defaultGCRatio
+	store, cleanup := setupLocalStore(t, ldbCap)
+	defer cleanup()
+
+	nonStoredAddr := GenerateRandomChunk(128).Address()
+
+	has := store.Has(context.Background(), nonStoredAddr)
+	if has {
+		t.Fatal("Expected Has() to return false, but returned true!")
+	}
+
+	storeChunks := GenerateRandomChunks(128, 3)
+	for _, ch := range storeChunks {
+		err := store.Put(context.Background(), ch)
+		if err != nil {
+			t.Fatalf("Expected store to store chunk, but it failed: %v", err)
+		}
+
+		has := store.Has(context.Background(), ch.Address())
+		if !has {
+			t.Fatal("Expected Has() to return true, but returned false!")
+		}
+	}
+
+	//let's be paranoic and test again that the non-existent chunk returns false
+	has = store.Has(context.Background(), nonStoredAddr)
+	if has {
+		t.Fatal("Expected Has() to return false, but returned true!")
+	}
+
+}

swarm/storage/localstore_test.go

@@ -48,6 +48,11 @@ func NewMemStore(params *StoreParams, _ *LDBStore) (m *MemStore) {
 	}
 }
 
+// Has needed to implement SyncChunkStore
+func (m *MemStore) Has(_ context.Context, addr Address) bool {
+	return m.cache.Contains(addr)
+}
+
 func (m *MemStore) Get(_ context.Context, addr Address) (Chunk, error) {
 	if m.disabled {
 		return nil, ErrChunkNotFound

swarm/storage/memstore.go

@@ -158,6 +158,13 @@ func (n *NetStore) get(ctx context.Context, ref Address) (Chunk, func(context.Co
 	return chunk, nil, nil
 }
 
+// Has is the storage layer entry point to query the underlying
+// database to return if it has a chunk or not.
+// Called from the DebugAPI
+func (n *NetStore) Has(ctx context.Context, ref Address) bool {
+	return n.store.Has(ctx, ref)
+}
+
 // getOrCreateFetcher attempts at retrieving an existing fetchers
 // if none exists, creates one and saves it in the fetchers cache
 // caller must hold the lock