package filer import ( "fmt" "github.com/chrislusf/seaweedfs/weed/pb" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" "github.com/chrislusf/seaweedfs/weed/pb/remote_pb" "github.com/golang/protobuf/proto" "google.golang.org/grpc" ) func ReadMountMappings(grpcDialOption grpc.DialOption, filerAddress pb.ServerAddress) (mappings *remote_pb.RemoteStorageMapping, readErr error) { var oldContent []byte if readErr = pb.WithFilerClient(filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error { oldContent, readErr = ReadInsideFiler(client, DirectoryEtcRemote, REMOTE_STORAGE_MOUNT_FILE) return readErr }); readErr != nil { return nil, readErr } mappings, readErr = UnmarshalRemoteStorageMappings(oldContent) if readErr != nil { return nil, fmt.Errorf("unmarshal mappings: %v", readErr) } return } func InsertMountMapping(filerClient filer_pb.FilerClient, dir string, remoteStorageLocation *remote_pb.RemoteStorageLocation) (err error) { // read current mapping var oldContent, newContent []byte err = filerClient.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error { oldContent, err = ReadInsideFiler(client, DirectoryEtcRemote, REMOTE_STORAGE_MOUNT_FILE) return err }) if err != nil { if err != filer_pb.ErrNotFound { return fmt.Errorf("read existing mapping: %v", err) } } // add new mapping newContent, err = addRemoteStorageMapping(oldContent, dir, remoteStorageLocation) if err != nil { return fmt.Errorf("add mapping %s~%s: %v", dir, remoteStorageLocation, err) } // save back err = filerClient.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error { return SaveInsideFiler(client, DirectoryEtcRemote, REMOTE_STORAGE_MOUNT_FILE, newContent) }) if err != nil { return fmt.Errorf("save mapping: %v", err) } return nil } func DeleteMountMapping(filerClient filer_pb.FilerClient, dir string) (err error) { // read current mapping var oldContent, newContent []byte err = filerClient.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error { oldContent, err = ReadInsideFiler(client, DirectoryEtcRemote, REMOTE_STORAGE_MOUNT_FILE) return err }) if err != nil { if err != filer_pb.ErrNotFound { return fmt.Errorf("read existing mapping: %v", err) } } // add new mapping newContent, err = removeRemoteStorageMapping(oldContent, dir) if err != nil { return fmt.Errorf("delete mount %s: %v", dir, err) } // save back err = filerClient.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error { return SaveInsideFiler(client, DirectoryEtcRemote, REMOTE_STORAGE_MOUNT_FILE, newContent) }) if err != nil { return fmt.Errorf("save mapping: %v", err) } return nil } func addRemoteStorageMapping(oldContent []byte, dir string, storageLocation *remote_pb.RemoteStorageLocation) (newContent []byte, err error) { mappings, unmarshalErr := UnmarshalRemoteStorageMappings(oldContent) if unmarshalErr != nil { // skip } // set the new mapping mappings.Mappings[dir] = storageLocation if newContent, err = proto.Marshal(mappings); err != nil { return oldContent, fmt.Errorf("marshal mappings: %v", err) } return } func removeRemoteStorageMapping(oldContent []byte, dir string) (newContent []byte, err error) { mappings, unmarshalErr := UnmarshalRemoteStorageMappings(oldContent) if unmarshalErr != nil { return nil, unmarshalErr } // set the new mapping delete(mappings.Mappings, dir) if newContent, err = proto.Marshal(mappings); err != nil { return oldContent, fmt.Errorf("marshal mappings: %v", err) } return }