bootstrap filer from one peer

weed/server/filer_grpc_server_traverse_meta.go

@@ -0,0 +1,84 @@
+package weed_server
+
+import (
+	"context"
+	"fmt"
+	"github.com/seaweedfs/seaweedfs/weed/filer"
+	"github.com/seaweedfs/seaweedfs/weed/glog"
+	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
+	"github.com/seaweedfs/seaweedfs/weed/util"
+	"github.com/viant/ptrie"
+)
+
+func (fs *FilerServer) TraverseBfsMetadata(req *filer_pb.TraverseBfsMetadataRequest, stream filer_pb.SeaweedFiler_TraverseBfsMetadataServer) error {
+
+	glog.V(0).Infof("TraverseBfsMetadata %v", req)
+
+	excludedTrie := ptrie.New[bool]()
+	for _, excluded := range req.ExcludedPrefixes {
+		excludedTrie.Put([]byte(excluded), true)
+	}
+
+	ctx := stream.Context()
+
+	queue := util.NewQueue[*filer.Entry]()
+	dirEntry, err := fs.filer.FindEntry(ctx, util.FullPath(req.Directory))
+	if err != nil {
+		return fmt.Errorf("find dir %s: %v", req.Directory, err)
+	}
+	queue.Enqueue(dirEntry)
+
+	for item := queue.Dequeue(); item != nil; item = queue.Dequeue() {
+		if excludedTrie.MatchPrefix([]byte(item.FullPath), func(key []byte, value bool) bool {
+			return true
+		}) {
+			// println("excluded", item.FullPath)
+			continue
+		}
+		parent, _ := item.FullPath.DirAndName()
+		if err := stream.Send(&filer_pb.TraverseBfsMetadataResponse{
+			Directory: parent,
+			Entry:     item.ToProtoEntry(),
+		}); err != nil {
+			return fmt.Errorf("send traverse bfs metadata response: %v", err)
+		}
+
+		if !item.IsDirectory() {
+			continue
+		}
+
+		if err := fs.iterateDirectory(ctx, item.FullPath, func(entry *filer.Entry) error {
+			queue.Enqueue(entry)
+			return nil
+		}); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (fs *FilerServer) iterateDirectory(ctx context.Context, dirPath util.FullPath, fn func(entry *filer.Entry) error) (err error) {
+	var lastFileName string
+	var listErr error
+	for {
+		var hasEntries bool
+		lastFileName, listErr = fs.filer.StreamListDirectoryEntries(ctx, dirPath, lastFileName, false, 1024, "", "", "", func(entry *filer.Entry) bool {
+			hasEntries = true
+			if fnErr := fn(entry); fnErr != nil {
+				err = fnErr
+				return false
+			}
+			return true
+		})
+		if listErr != nil {
+			return listErr
+		}
+		if err != nil {
+			return err
+		}
+		if !hasEntries {
+			return nil
+		}
+	}
+}