Merge pull request #1041 from devimc/topic/no9pCopyFiles

Copy files from host to guest

Gopkg.lock

@@ -245,7 +245,7 @@
   revision = "737f03de595e216116264cc74a58e5f2a1df789a"
 
 [[projects]]
-  digest = "1:bc6ec5ed69614cb8304b6b6532a4df381ebf5a57c4fc065cd593f54e9ff7e7a7"
+  digest = "1:590bfb6f8d5741fa38bb3022f55588fb7e06389f6b7b6692a965e0e5a4363fb1"
   name = "github.com/kata-containers/agent"
   packages = [
     "pkg/types",
@@ -253,7 +253,7 @@
     "protocols/grpc",
   ]
   pruneopts = "NUT"
-  revision = "100dbc569d0673744cc66accfbb61a0229c5b0ad"
+  revision = "8e48125fa2a793706e5e660e95bdc9755f1cf474"
 
 [[projects]]
   digest = "1:04054595e5c5a35d1553a7f3464d18577caf597445d643992998643df56d4afd"

Gopkg.toml

@@ -56,7 +56,7 @@
 
 [[constraint]]
   name = "github.com/kata-containers/agent"
-  revision = "100dbc569d0673744cc66accfbb61a0229c5b0ad"
+  revision = "8e48125fa2a793706e5e660e95bdc9755f1cf474"
 
 [[constraint]]
   name = "github.com/containerd/cri-containerd"

vendor/github.com/kata-containers/agent/protocols/grpc/agent.pb.go

@@ -59,6 +59,7 @@
 		Storage
 		Device
 		StringUser
+		CopyFileRequest
 		CheckRequest
 		HealthCheckResponse
 		VersionCheckResponse
@@ -1602,6 +1603,89 @@ func (m *StringUser) GetAdditionalGids() []string {
 	return nil
 }
 
+type CopyFileRequest struct {
+	// Path is the destination file in the guest. It must be absolute,
+	// canonical and below /run.
+	Path string `protobuf:"bytes,1,opt,name=path,proto3" json:"path,omitempty"`
+	// FileSize is the expected file size, for security reasons write operations
+	// are made in a temporary file, once it has the expected size, it's moved
+	// to the destination path.
+	FileSize int64 `protobuf:"varint,2,opt,name=file_size,json=fileSize,proto3" json:"file_size,omitempty"`
+	// FileMode is the file mode.
+	FileMode uint32 `protobuf:"varint,3,opt,name=file_mode,json=fileMode,proto3" json:"file_mode,omitempty"`
+	// DirMode is the mode for the parent directories of destination path.
+	DirMode uint32 `protobuf:"varint,4,opt,name=dir_mode,json=dirMode,proto3" json:"dir_mode,omitempty"`
+	// Uid is the numeric user id.
+	Uid int32 `protobuf:"varint,5,opt,name=uid,proto3" json:"uid,omitempty"`
+	// Gid is the numeric group id.
+	Gid int32 `protobuf:"varint,6,opt,name=gid,proto3" json:"gid,omitempty"`
+	// Offset for the next write operation.
+	Offset int64 `protobuf:"varint,7,opt,name=offset,proto3" json:"offset,omitempty"`
+	// Data to write in the destination file.
+	Data []byte `protobuf:"bytes,8,opt,name=data,proto3" json:"data,omitempty"`
+}
+
+func (m *CopyFileRequest) Reset()                    { *m = CopyFileRequest{} }
+func (m *CopyFileRequest) String() string            { return proto.CompactTextString(m) }
+func (*CopyFileRequest) ProtoMessage()               {}
+func (*CopyFileRequest) Descriptor() ([]byte, []int) { return fileDescriptorAgent, []int{49} }
+
+func (m *CopyFileRequest) GetPath() string {
+	if m != nil {
+		return m.Path
+	}
+	return ""
+}
+
+func (m *CopyFileRequest) GetFileSize() int64 {
+	if m != nil {
+		return m.FileSize
+	}
+	return 0
+}
+
+func (m *CopyFileRequest) GetFileMode() uint32 {
+	if m != nil {
+		return m.FileMode
+	}
+	return 0
+}
+
+func (m *CopyFileRequest) GetDirMode() uint32 {
+	if m != nil {
+		return m.DirMode
+	}
+	return 0
+}
+
+func (m *CopyFileRequest) GetUid() int32 {
+	if m != nil {
+		return m.Uid
+	}
+	return 0
+}
+
+func (m *CopyFileRequest) GetGid() int32 {
+	if m != nil {
+		return m.Gid
+	}
+	return 0
+}
+
+func (m *CopyFileRequest) GetOffset() int64 {
+	if m != nil {
+		return m.Offset
+	}
+	return 0
+}
+
+func (m *CopyFileRequest) GetData() []byte {
+	if m != nil {
+		return m.Data
+	}
+	return nil
+}
+
 func init() {
 	proto.RegisterType((*CreateContainerRequest)(nil), "grpc.CreateContainerRequest")
 	proto.RegisterType((*StartContainerRequest)(nil), "grpc.StartContainerRequest")
@@ -1652,6 +1736,7 @@ func init() {
 	proto.RegisterType((*Storage)(nil), "grpc.Storage")
 	proto.RegisterType((*Device)(nil), "grpc.Device")
 	proto.RegisterType((*StringUser)(nil), "grpc.StringUser")
+	proto.RegisterType((*CopyFileRequest)(nil), "grpc.CopyFileRequest")
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -1703,6 +1788,7 @@ type AgentServiceClient interface {
 	ReseedRandomDev(ctx context.Context, in *ReseedRandomDevRequest, opts ...grpc1.CallOption) (*google_protobuf2.Empty, error)
 	GetGuestDetails(ctx context.Context, in *GuestDetailsRequest, opts ...grpc1.CallOption) (*GuestDetailsResponse, error)
 	SetGuestDateTime(ctx context.Context, in *SetGuestDateTimeRequest, opts ...grpc1.CallOption) (*google_protobuf2.Empty, error)
+	CopyFile(ctx context.Context, in *CopyFileRequest, opts ...grpc1.CallOption) (*google_protobuf2.Empty, error)
 }
 
 type agentServiceClient struct {
@@ -1965,6 +2051,15 @@ func (c *agentServiceClient) SetGuestDateTime(ctx context.Context, in *SetGuestD
 	return out, nil
 }
 
+func (c *agentServiceClient) CopyFile(ctx context.Context, in *CopyFileRequest, opts ...grpc1.CallOption) (*google_protobuf2.Empty, error) {
+	out := new(google_protobuf2.Empty)
+	err := grpc1.Invoke(ctx, "/grpc.AgentService/CopyFile", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // Server API for AgentService service
 
 type AgentServiceServer interface {
@@ -2006,6 +2101,7 @@ type AgentServiceServer interface {
 	ReseedRandomDev(context.Context, *ReseedRandomDevRequest) (*google_protobuf2.Empty, error)
 	GetGuestDetails(context.Context, *GuestDetailsRequest) (*GuestDetailsResponse, error)
 	SetGuestDateTime(context.Context, *SetGuestDateTimeRequest) (*google_protobuf2.Empty, error)
+	CopyFile(context.Context, *CopyFileRequest) (*google_protobuf2.Empty, error)
 }
 
 func RegisterAgentServiceServer(s *grpc1.Server, srv AgentServiceServer) {
@@ -2516,6 +2612,24 @@ func _AgentService_SetGuestDateTime_Handler(srv interface{}, ctx context.Context
 	return interceptor(ctx, in, info, handler)
 }
 
+func _AgentService_CopyFile_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc1.UnaryServerInterceptor) (interface{}, error) {
+	in := new(CopyFileRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(AgentServiceServer).CopyFile(ctx, in)
+	}
+	info := &grpc1.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.AgentService/CopyFile",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(AgentServiceServer).CopyFile(ctx, req.(*CopyFileRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 var _AgentService_serviceDesc = grpc1.ServiceDesc{
 	ServiceName: "grpc.AgentService",
 	HandlerType: (*AgentServiceServer)(nil),
@@ -2632,6 +2746,10 @@ var _AgentService_serviceDesc = grpc1.ServiceDesc{
 			MethodName: "SetGuestDateTime",
 			Handler:    _AgentService_SetGuestDateTime_Handler,
 		},
+		{
+			MethodName: "CopyFile",
+			Handler:    _AgentService_CopyFile_Handler,
+		},
 	},
 	Streams:  []grpc1.StreamDesc{},
 	Metadata: "agent.proto",
@@ -4544,6 +4662,66 @@ func (m *StringUser) MarshalTo(dAtA []byte) (int, error) {
 	return i, nil
 }
 
+func (m *CopyFileRequest) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalTo(dAtA)
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *CopyFileRequest) MarshalTo(dAtA []byte) (int, error) {
+	var i int
+	_ = i
+	var l int
+	_ = l
+	if len(m.Path) > 0 {
+		dAtA[i] = 0xa
+		i++
+		i = encodeVarintAgent(dAtA, i, uint64(len(m.Path)))
+		i += copy(dAtA[i:], m.Path)
+	}
+	if m.FileSize != 0 {
+		dAtA[i] = 0x10
+		i++
+		i = encodeVarintAgent(dAtA, i, uint64(m.FileSize))
+	}
+	if m.FileMode != 0 {
+		dAtA[i] = 0x18
+		i++
+		i = encodeVarintAgent(dAtA, i, uint64(m.FileMode))
+	}
+	if m.DirMode != 0 {
+		dAtA[i] = 0x20
+		i++
+		i = encodeVarintAgent(dAtA, i, uint64(m.DirMode))
+	}
+	if m.Uid != 0 {
+		dAtA[i] = 0x28
+		i++
+		i = encodeVarintAgent(dAtA, i, uint64(m.Uid))
+	}
+	if m.Gid != 0 {
+		dAtA[i] = 0x30
+		i++
+		i = encodeVarintAgent(dAtA, i, uint64(m.Gid))
+	}
+	if m.Offset != 0 {
+		dAtA[i] = 0x38
+		i++
+		i = encodeVarintAgent(dAtA, i, uint64(m.Offset))
+	}
+	if len(m.Data) > 0 {
+		dAtA[i] = 0x42
+		i++
+		i = encodeVarintAgent(dAtA, i, uint64(len(m.Data)))
+		i += copy(dAtA[i:], m.Data)
+	}
+	return i, nil
+}
+
 func encodeVarintAgent(dAtA []byte, offset int, v uint64) int {
 	for v >= 1<<7 {
 		dAtA[offset] = uint8(v&0x7f | 0x80)
@@ -5367,6 +5545,38 @@ func (m *StringUser) Size() (n int) {
 	return n
 }
 
+func (m *CopyFileRequest) Size() (n int) {
+	var l int
+	_ = l
+	l = len(m.Path)
+	if l > 0 {
+		n += 1 + l + sovAgent(uint64(l))
+	}
+	if m.FileSize != 0 {
+		n += 1 + sovAgent(uint64(m.FileSize))
+	}
+	if m.FileMode != 0 {
+		n += 1 + sovAgent(uint64(m.FileMode))
+	}
+	if m.DirMode != 0 {
+		n += 1 + sovAgent(uint64(m.DirMode))
+	}
+	if m.Uid != 0 {
+		n += 1 + sovAgent(uint64(m.Uid))
+	}
+	if m.Gid != 0 {
+		n += 1 + sovAgent(uint64(m.Gid))
+	}
+	if m.Offset != 0 {
+		n += 1 + sovAgent(uint64(m.Offset))
+	}
+	l = len(m.Data)
+	if l > 0 {
+		n += 1 + l + sovAgent(uint64(l))
+	}
+	return n
+}
+
 func sovAgent(x uint64) (n int) {
 	for {
 		n++
@@ -11402,6 +11612,230 @@ func (m *StringUser) Unmarshal(dAtA []byte) error {
 	}
 	return nil
 }
+func (m *CopyFileRequest) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowAgent
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: CopyFileRequest: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: CopyFileRequest: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Path", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowAgent
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthAgent
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Path = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 2:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field FileSize", wireType)
+			}
+			m.FileSize = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowAgent
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.FileSize |= (int64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 3:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field FileMode", wireType)
+			}
+			m.FileMode = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowAgent
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.FileMode |= (uint32(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 4:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field DirMode", wireType)
+			}
+			m.DirMode = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowAgent
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.DirMode |= (uint32(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 5:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Uid", wireType)
+			}
+			m.Uid = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowAgent
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.Uid |= (int32(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 6:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Gid", wireType)
+			}
+			m.Gid = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowAgent
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.Gid |= (int32(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 7:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Offset", wireType)
+			}
+			m.Offset = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowAgent
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.Offset |= (int64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 8:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Data", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowAgent
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthAgent
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Data = append(m.Data[:0], dAtA[iNdEx:postIndex]...)
+			if m.Data == nil {
+				m.Data = []byte{}
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipAgent(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthAgent
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
 func skipAgent(dAtA []byte) (n int, err error) {
 	l := len(dAtA)
 	iNdEx := 0
@@ -11510,161 +11944,168 @@ var (
 func init() { proto.RegisterFile("agent.proto", fileDescriptorAgent) }
 
 var fileDescriptorAgent = []byte{
-	// 2493 bytes of a gzipped FileDescriptorProto
+	// 2596 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xc4, 0x58, 0x5b, 0x6f, 0x1b, 0xc7,
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xc4, 0x58, 0x5f, 0x6f, 0x24, 0x47,
-	0xf5, 0x07, 0x2f, 0xba, 0xf0, 0x90, 0x14, 0xc5, 0x91, 0x2c, 0x33, 0x74, 0xe2, 0xbf, 0xb2, 0xce,
+	0x11, 0xd7, 0xfe, 0xf1, 0x7a, 0xb7, 0x76, 0xd7, 0xeb, 0x6d, 0xfb, 0x7c, 0x9b, 0xbd, 0x24, 0x5c,
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+	0x26, 0xe1, 0xe2, 0x10, 0xb2, 0x26, 0x97, 0x88, 0x84, 0x9c, 0xc2, 0xe9, 0xce, 0x67, 0xce, 0x26,
-	0xd5, 0xa5, 0x05, 0x17, 0x28, 0x8a, 0xc5, 0x6a, 0x77, 0x4c, 0x4e, 0xc4, 0xdd, 0xd9, 0xec, 0xcc,
+	0x39, 0xce, 0x8c, 0x63, 0x05, 0x09, 0xa1, 0xd1, 0x78, 0xa6, 0xbd, 0xee, 0x78, 0x67, 0x7a, 0xd2,
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+	0xdd, 0xe3, 0xbb, 0x0d, 0x12, 0xe2, 0x89, 0x6f, 0xc1, 0x17, 0x40, 0xbc, 0xf1, 0x0d, 0x10, 0x0f,
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+	0x11, 0x4f, 0xbc, 0x23, 0x21, 0x94, 0x8f, 0xc0, 0x27, 0x40, 0xfd, 0x6f, 0xfe, 0xec, 0x1f, 0x5f,
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+	0x70, 0x2c, 0xf1, 0x32, 0x9a, 0xaa, 0xae, 0xfe, 0x75, 0x55, 0x75, 0x77, 0x75, 0x55, 0x41, 0xdb,
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+	0x1f, 0xe3, 0x58, 0x8c, 0x12, 0x46, 0x05, 0x45, 0xf5, 0x31, 0x4b, 0x82, 0x61, 0x8b, 0x06, 0x44,
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+	0x33, 0x86, 0x3f, 0x1e, 0x13, 0x71, 0x96, 0x9e, 0x8c, 0x02, 0x1a, 0xed, 0x9c, 0xfb, 0xc2, 0x7f,
-	0xa3, 0x21, 0x77, 0x49, 0x88, 0x63, 0xb6, 0x2d, 0x27, 0x6e, 0x47, 0xe7, 0x83, 0x6d, 0x3e, 0x8e,
+	0x27, 0xa0, 0xb1, 0xf0, 0x49, 0x8c, 0x19, 0xdf, 0x51, 0x13, 0x77, 0x92, 0xf3, 0xf1, 0x8e, 0x98,
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-	0x33, 0xa4, 0xd8, 0x35, 0x01, 0x4d, 0x42, 0xee, 0x44, 0x94, 0x84, 0x5c, 0x27, 0x38, 0x90, 0xac,
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-	0x13, 0xc1, 0xb1, 0xfe, 0x50, 0x82, 0x45, 0xd5, 0xa1, 0x14, 0x2f, 0x8b, 0xf4, 0x8a, 0x28, 0x13,
+	0x14, 0xeb, 0x50, 0x72, 0x9c, 0x3f, 0x54, 0xa0, 0xa1, 0x3b, 0x94, 0xb2, 0xb2, 0xc8, 0x9e, 0x88,
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+	0x2a, 0x51, 0xcf, 0xad, 0x5a, 0x4b, 0x3f, 0x0b, 0xea, 0x5f, 0x5e, 0x89, 0x8b, 0x48, 0x07, 0x4b,
-	0x2e, 0x02, 0x91, 0x25, 0x85, 0x67, 0xd9, 0x4d, 0x23, 0xc7, 0x95, 0x89, 0xcd, 0x94, 0x2b, 0xc5,
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-	0xe6, 0x5a, 0x6a, 0xfd, 0x4a, 0x3c, 0xa8, 0xd2, 0xee, 0xdc, 0x2a, 0x54, 0x92, 0xd4, 0x18, 0xf1,
+	0x95, 0xd8, 0x52, 0x4d, 0x9d, 0x5f, 0xc9, 0x82, 0x2a, 0xeb, 0xce, 0xad, 0x43, 0x2d, 0xcd, 0x94,
-	0x2b, 0x38, 0x83, 0xf4, 0x8e, 0x12, 0xbf, 0xe8, 0x3e, 0xac, 0xb8, 0xbe, 0x4f, 0xc4, 0x74, 0x77,
+	0x91, 0xbf, 0x92, 0x33, 0xce, 0xde, 0x28, 0xf9, 0x8b, 0xee, 0xc0, 0x9a, 0x1f, 0x86, 0x44, 0x4e,
-	0x74, 0x48, 0xfc, 0x74, 0xbf, 0x17, 0xb9, 0x3b, 0x7f, 0x6c, 0xe9, 0x43, 0xa6, 0x4b, 0x7c, 0x74,
+	0xf7, 0x27, 0x8f, 0x49, 0x98, 0x9d, 0xf7, 0x32, 0xd7, 0xf9, 0x7b, 0x05, 0x7a, 0xbb, 0x34, 0x99,
-	0x08, 0xad, 0x89, 0x96, 0x31, 0xd2, 0x6f, 0xbe, 0xd9, 0x9d, 0xe4, 0xee, 0x46, 0x4f, 0xb5, 0xa0,
+	0xfe, 0x8c, 0x4c, 0x70, 0xe1, 0x32, 0x2a, 0x25, 0xf5, 0x02, 0xea, 0x5f, 0x26, 0xab, 0xa7, 0x64,
-	0x7b, 0xa6, 0x05, 0xdd, 0x3b, 0x08, 0x22, 0x3e, 0x46, 0x07, 0xb0, 0x52, 0x6c, 0xae, 0xa2, 0x3b,
+	0x82, 0xf5, 0x29, 0xd5, 0x3b, 0xdb, 0x94, 0x0c, 0x79, 0xb8, 0xb2, 0xc1, 0xac, 0xe9, 0xd1, 0xd5,
-	0xe6, 0xc6, 0x9a, 0xd1, 0x72, 0x9d, 0x0b, 0x73, 0x08, 0xad, 0x89, 0x3e, 0xab, 0xb1, 0x67, 0x76,
+	0x83, 0x4f, 0x68, 0x88, 0x65, 0x3c, 0x08, 0x09, 0xf3, 0xb2, 0x16, 0x47, 0xd7, 0x5d, 0x0d, 0x09,
-	0xfb, 0x75, 0x2e, 0xd0, 0x13, 0xa8, 0xe7, 0x1a, 0xab, 0xa8, 0xa3, 0x40, 0xa6, 0x7b, 0xad, 0x73,
+	0x53, 0x43, 0xc6, 0x90, 0x15, 0xd5, 0x65, 0x2b, 0x1a, 0xd2, 0xd0, 0x1c, 0x69, 0xc8, 0x16, 0x34,
-	0x01, 0xf6, 0xa0, 0x59, 0xe8, 0x75, 0xa2, 0xae, 0xf6, 0x67, 0x46, 0x03, 0x74, 0x2e, 0xc8, 0x2e,
+	0xe8, 0xe9, 0x29, 0xc7, 0x42, 0x75, 0x70, 0x6b, 0xae, 0xa1, 0xb2, 0x88, 0xd1, 0xcc, 0x23, 0xc6,
-	0xd4, 0x73, 0x2d, 0x47, 0x63, 0xc5, 0x74, 0x5f, 0xb3, 0xfb, 0xce, 0x8c, 0x11, 0x7d, 0xee, 0x8f,
+	0xdd, 0xbf, 0xf6, 0x4c, 0xc4, 0x30, 0xf5, 0x0a, 0x7a, 0x0c, 0xbd, 0x99, 0xfe, 0x37, 0x32, 0x05,
-	0xa0, 0x59, 0x68, 0x10, 0x1a, 0x43, 0x66, 0x35, 0x27, 0xbb, 0x77, 0x66, 0x8e, 0x69, 0xa4, 0x43,
+	0xec, 0xe2, 0xb6, 0xf8, 0x70, 0x6b, 0xa4, 0xfb, 0xe9, 0x23, 0xdb, 0x4f, 0x1f, 0xed, 0x45, 0x89,
-	0x68, 0x4d, 0xb4, 0x0b, 0x4d, 0x70, 0x67, 0x77, 0x11, 0xe7, 0xba, 0xf5, 0xa5, 0x5c, 0xec, 0x5c,
+	0x98, 0xa2, 0x3d, 0x58, 0x2b, 0x77, 0x8a, 0xd1, 0x2d, 0xfb, 0xfc, 0x2e, 0xe8, 0x1f, 0x2f, 0x85,
-	0x7d, 0x9c, 0x5b, 0xec, 0xe9, 0xe6, 0x60, 0xf7, 0xdd, 0xd9, 0x83, 0xda, 0xaa, 0x03, 0x58, 0x29,
+	0x79, 0x0c, 0xbd, 0x99, 0xa6, 0xb1, 0xd5, 0x67, 0x71, 0x2f, 0x79, 0x29, 0xd0, 0x7d, 0x68, 0x17,
-	0xf6, 0x05, 0x0d, 0xd8, 0xcc, 0x6e, 0xe1, 0xd5, 0x3b, 0xa7, 0xd0, 0x22, 0xcc, 0x76, 0xce, 0xac,
+	0xba, 0xc4, 0x68, 0xa0, 0x41, 0xe6, 0x1b, 0xc7, 0x4b, 0x01, 0x76, 0xa1, 0x5b, 0x6a, 0xdc, 0xa2,
-	0xce, 0xe1, 0x5c, 0xa0, 0xa7, 0x00, 0xba, 0x8c, 0xf6, 0x49, 0x98, 0x2e, 0xd9, 0x54, 0xf9, 0x9e,
+	0xa1, 0xb1, 0x67, 0x41, 0x37, 0x77, 0x29, 0xc8, 0x43, 0x68, 0x17, 0xfa, 0xa7, 0x56, 0x8b, 0xf9,
-	0x2e, 0xd9, 0x8c, 0x92, 0xfb, 0x09, 0x80, 0xaa, 0x7e, 0x7d, 0x9a, 0x70, 0x74, 0xdb, 0x98, 0x31,
+	0x26, 0xed, 0xf0, 0xa5, 0x05, 0x23, 0x26, 0x88, 0xed, 0x43, 0xb7, 0xd4, 0xed, 0xb4, 0x8a, 0x2c,
-	0x51, 0x72, 0x77, 0x3b, 0xd3, 0x03, 0x53, 0x00, 0x38, 0x8e, 0xaf, 0x03, 0xf0, 0x05, 0x40, 0x56,
+	0xea, 0xb4, 0x0e, 0x6f, 0x2d, 0x1c, 0x33, 0x48, 0x8f, 0xa1, 0x37, 0xd3, 0xfb, 0xb4, 0xce, 0x5d,
-	0x55, 0x1b, 0x80, 0xa9, 0x3a, 0xfb, 0x8a, 0x18, 0x34, 0xf2, 0x35, 0x34, 0xd2, 0xbe, 0xce, 0xa8,
+	0xdc, 0x12, 0x5d, 0x6a, 0xd6, 0x27, 0x6a, 0xb3, 0x0b, 0xc9, 0x7e, 0x61, 0xb3, 0xe7, 0x3b, 0x9d,
-	0xab, 0xe7, 0x42, 0x3c, 0x86, 0x46, 0xbe, 0xb0, 0x32, 0x10, 0x33, 0x8a, 0xad, 0xee, 0x54, 0x3d,
+	0xc3, 0x97, 0x17, 0x0f, 0x1a, 0xad, 0xf6, 0x60, 0xad, 0xdc, 0xe4, 0xb4, 0x60, 0x0b, 0x5b, 0x9f,
-	0x84, 0x9e, 0x9a, 0x9d, 0x9a, 0xb1, 0x0a, 0x3b, 0xf5, 0xfb, 0x41, 0x4c, 0x54, 0x64, 0xc5, 0x4c,
+	0x97, 0x9f, 0x9c, 0x52, 0xbf, 0x33, 0x3f, 0x39, 0x8b, 0xda, 0xa0, 0x4b, 0x81, 0x1e, 0x00, 0x98,
-	0xf2, 0x3d, 0x20, 0x3e, 0x83, 0x46, 0xbe, 0x14, 0x33, 0x2e, 0xcc, 0x28, 0xcf, 0xba, 0x85, 0x72,
+	0x9a, 0x20, 0x24, 0x71, 0xb6, 0x65, 0x73, 0xb5, 0x48, 0xb6, 0x65, 0x0b, 0xea, 0x87, 0xfb, 0x00,
-	0x0c, 0x3d, 0x81, 0x95, 0x62, 0x19, 0x86, 0x72, 0xe7, 0x72, 0xaa, 0x38, 0xeb, 0xea, 0xb7, 0x72,
+	0x3a, 0x95, 0x0f, 0x69, 0x2a, 0xd0, 0x4d, 0xab, 0xc6, 0x4c, 0xfd, 0x30, 0x1c, 0xcc, 0x0f, 0xcc,
-	0x4e, 0xfc, 0x21, 0x40, 0x56, 0xae, 0x99, 0xe5, 0x9b, 0x2a, 0xe0, 0x26, 0xb4, 0xee, 0x41, 0xb3,
+	0x01, 0x60, 0xc6, 0xae, 0x02, 0xf0, 0x31, 0x40, 0x5e, 0x22, 0x58, 0x80, 0xb9, 0xa2, 0xe1, 0x12,
-	0xf0, 0xf4, 0x30, 0x89, 0x62, 0xd6, 0x7b, 0xe4, 0xaa, 0x3c, 0x5e, 0x2c, 0xf1, 0x8d, 0xe9, 0x33,
+	0x1f, 0x74, 0x8a, 0x05, 0x01, 0x32, 0xb6, 0x2e, 0x28, 0x12, 0x96, 0x42, 0xdc, 0x83, 0x4e, 0x31,
-	0x0b, 0xff, 0xab, 0x36, 0x50, 0xbe, 0xb4, 0x34, 0xa1, 0x9b, 0x51, 0x6e, 0xbe, 0xe5, 0x40, 0xe7,
+	0x4b, 0xb4, 0x10, 0x0b, 0x32, 0xc7, 0xe1, 0x5c, 0x72, 0x87, 0x1e, 0xd8, 0x93, 0x9a, 0xb3, 0x4a,
-	0xcb, 0xc7, 0xdc, 0x81, 0x9e, 0x51, 0x55, 0xce, 0x05, 0x3a, 0x82, 0xd6, 0xa1, 0x29, 0x67, 0x74,
+	0x27, 0xf5, 0xdb, 0x41, 0xcc, 0xa4, 0x97, 0xe5, 0x48, 0xf2, 0x2d, 0x20, 0x3e, 0x80, 0x4e, 0x31,
-	0x6d, 0xa9, 0xcd, 0x99, 0x51, 0xa5, 0x75, 0xbb, 0xb3, 0x86, 0xf4, 0xa9, 0x3a, 0x86, 0xd5, 0xc9,
+	0xaf, 0xb4, 0x26, 0x2c, 0xc8, 0x35, 0x87, 0xa5, 0xdc, 0x12, 0xdd, 0x87, 0xb5, 0x72, 0x4e, 0x89,
-	0xc2, 0x08, 0xbd, 0xa7, 0x93, 0xdb, 0xec, 0x82, 0x69, 0x9e, 0x51, 0xbb, 0x8d, 0xef, 0xde, 0xdc,
+	0x0a, 0xf7, 0x72, 0x2e, 0xd3, 0x1c, 0x9a, 0xc2, 0xbf, 0x20, 0xfe, 0x1e, 0x40, 0x9e, 0x7b, 0xda,
-	0x2d, 0xfd, 0xfd, 0xcd, 0xdd, 0xd2, 0xbf, 0xde, 0xdc, 0x2d, 0x9d, 0x2d, 0xca, 0xd1, 0x87, 0xff,
+	0xed, 0x9b, 0xcb, 0x46, 0x67, 0x56, 0xdd, 0x85, 0x6e, 0xa9, 0x8e, 0xb2, 0x81, 0x62, 0x51, 0x71,
-	0x09, 0x00, 0x00, 0xff, 0xff, 0x0c, 0x58, 0x87, 0x08, 0x36, 0x1e, 0x00, 0x00,
+	0x75, 0x59, 0x1c, 0x2f, 0xd7, 0x2b, 0x56, 0xf5, 0x85, 0x55, 0xcc, 0x65, 0x07, 0xa8, 0x98, 0x27,
+	0x5b, 0xd7, 0x2d, 0xc8, 0x9d, 0x5f, 0x70, 0xa1, 0x8b, 0xb9, 0x70, 0xe1, 0x42, 0x2f, 0x48, 0x91,
+	0x97, 0x02, 0xed, 0x43, 0xef, 0xb1, 0xcd, 0xcd, 0x4c, 0xa2, 0x6c, 0xd4, 0x59, 0x90, 0x72, 0x0e,
+	0x87, 0x8b, 0x86, 0xcc, 0xad, 0x3a, 0x80, 0xf5, 0xd9, 0x2c, 0x0f, 0xbd, 0x62, 0x82, 0xdb, 0xe2,
+	0xec, 0x6f, 0xa9, 0x52, 0x3f, 0x81, 0xa6, 0xcd, 0x2a, 0x90, 0x69, 0x9b, 0xcd, 0x64, 0x19, 0xcb,
+	0xa6, 0x3e, 0xec, 0x7c, 0xfd, 0xcd, 0xab, 0x95, 0x7f, 0x7c, 0xf3, 0x6a, 0xe5, 0xdf, 0xdf, 0xbc,
+	0x5a, 0x39, 0x69, 0xa8, 0xd1, 0xf7, 0xfe, 0x1b, 0x00, 0x00, 0xff, 0xff, 0x44, 0x3b, 0xc9, 0x9d,
+	0x3e, 0x1f, 0x00, 0x00,
 }

virtcontainers/agent.go

@@ -250,4 +250,7 @@ type agent interface {
 
 	// setGuestDateTime asks the agent to set guest time to the provided one
 	setGuestDateTime(time.Time) error
+
+	// copyFile copies file from host to container's rootfs
+	copyFile(src, dst string) error
 }

virtcontainers/capabilities.go

@@ -9,6 +9,7 @@ const (
 	blockDeviceSupport = 1 << iota
 	blockDeviceHotplugSupport
 	multiQueueSupport
+	fsSharingUnsupported
 )
 
 type capabilities struct {
@@ -47,3 +48,11 @@ func (caps *capabilities) isMultiQueueSupported() bool {
 func (caps *capabilities) setMultiQueueSupport() {
 	caps.flags |= multiQueueSupport
 }
+
+func (caps *capabilities) isFsSharingSupported() bool {
+	return caps.flags&fsSharingUnsupported == 0
+}
+
+func (caps *capabilities) setFsSharingUnsupported() {
+	caps.flags |= fsSharingUnsupported
+}

virtcontainers/capabilities_test.go

@@ -34,3 +34,17 @@ func TestBlockDeviceHotplugCapability(t *testing.T) {
 		t.Fatal()
 	}
 }
+
+func TestFsSharingCapability(t *testing.T) {
+	var caps capabilities
+
+	if !caps.isFsSharingSupported() {
+		t.Fatal()
+	}
+
+	caps.setFsSharingUnsupported()
+
+	if caps.isFsSharingSupported() {
+		t.Fatal()
+	}
+}

virtcontainers/container.go

@@ -17,6 +17,7 @@ import (
 	"time"
 
 	"github.com/kata-containers/runtime/virtcontainers/pkg/annotations"
+	"github.com/kata-containers/runtime/virtcontainers/utils"
 	specs "github.com/opencontainers/runtime-spec/specs-go"
 	opentracing "github.com/opentracing/opentracing-go"
 	"github.com/sirupsen/logrus"
@@ -24,7 +25,6 @@ import (
 
 	"github.com/kata-containers/runtime/virtcontainers/device/config"
 	"github.com/kata-containers/runtime/virtcontainers/device/manager"
-	"github.com/kata-containers/runtime/virtcontainers/utils"
 )
 
 // https://github.com/torvalds/linux/blob/master/include/uapi/linux/major.h
@@ -431,6 +431,36 @@ func (c *Container) createContainersDirs() error {
 	return nil
 }
 
+func (c *Container) shareFiles(m Mount, idx int, hostSharedDir, guestSharedDir string) (string, error) {
+	randBytes, err := utils.GenerateRandomBytes(8)
+	if err != nil {
+		return "", err
+	}
+
+	filename := fmt.Sprintf("%s-%s-%s", c.id, hex.EncodeToString(randBytes), filepath.Base(m.Destination))
+	guestDest := filepath.Join(guestSharedDir, filename)
+
+	// copy file to contaier's rootfs if filesystem sharing is not supported, otherwise
+	// bind mount it in the shared directory.
+	caps := c.sandbox.hypervisor.capabilities()
+	if !caps.isFsSharingSupported() {
+		c.Logger().Debug("filesystem sharing is not supported, files will be copied")
+		if err := c.sandbox.agent.copyFile(m.Source, guestDest); err != nil {
+			return "", err
+		}
+	} else {
+		// These mounts are created in the shared dir
+		mountDest := filepath.Join(hostSharedDir, c.sandbox.id, filename)
+		if err := bindMount(c.ctx, m.Source, mountDest, false); err != nil {
+			return "", err
+		}
+		// Save HostPath mount value into the mount list of the container.
+		c.mounts[idx].HostPath = mountDest
+	}
+
+	return guestDest, nil
+}
+
 // mountSharedDirMounts handles bind-mounts by bindmounting to the host shared
 // directory which is mounted through 9pfs in the VM.
 // It also updates the container mount list with the HostPath info, and store
@@ -472,22 +502,11 @@ func (c *Container) mountSharedDirMounts(hostSharedDir, guestSharedDir string) (
 			continue
 		}
 
-		randBytes, err := utils.GenerateRandomBytes(8)
+		guestDest, err := c.shareFiles(m, idx, hostSharedDir, guestSharedDir)
 		if err != nil {
 			return nil, err
 		}
 
-		// These mounts are created in the shared dir
-		filename := fmt.Sprintf("%s-%s-%s", c.id, hex.EncodeToString(randBytes), filepath.Base(m.Destination))
-		mountDest := filepath.Join(hostSharedDir, c.sandbox.id, filename)
-
-		if err := bindMount(c.ctx, m.Source, mountDest, false); err != nil {
-			return nil, err
-		}
-
-		// Save HostPath mount value into the mount list of the container.
-		c.mounts[idx].HostPath = mountDest
-
 		// Check if mount is readonly, let the agent handle the readonly mount
 		// within the VM.
 		readonly := false
@@ -498,7 +517,7 @@ func (c *Container) mountSharedDirMounts(hostSharedDir, guestSharedDir string) (
 		}
 
 		sharedDirMount := Mount{
-			Source:      filepath.Join(guestSharedDir, filename),
+			Source:      guestDest,
 			Destination: m.Destination,
 			Type:        m.Type,
 			Options:     m.Options,

virtcontainers/hyperstart_agent.go

@@ -1005,3 +1005,8 @@ func (h *hyper) setGuestDateTime(time.Time) error {
 	// hyperstart-agent does not support setGuestDateTime
 	return nil
 }
+
+func (h *hyper) copyFile(src, dst string) error {
+	// hyperstart-agent does not support copyFile
+	return nil
+}

virtcontainers/hyperstart_agent_test.go

@@ -261,3 +261,11 @@ func TestHyperGetAgentUrl(t *testing.T) {
 	assert.Nil(err)
 	assert.Empty(url)
 }
+
+func TestHyperCopyFile(t *testing.T) {
+	assert := assert.New(t)
+	h := &hyper{}
+
+	err := h.copyFile("", "")
+	assert.Nil(err)
+}

virtcontainers/kata_agent.go

@@ -9,6 +9,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"io/ioutil"
 	"os"
 	"path/filepath"
 	"regexp"
@@ -34,6 +35,7 @@ import (
 	"github.com/sirupsen/logrus"
 	"github.com/vishvananda/netlink"
 	"golang.org/x/net/context"
+	"golang.org/x/sys/unix"
 	golangGrpc "google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	grpcStatus "google.golang.org/grpc/status"
@@ -63,6 +65,7 @@ var (
 	shmDir               = "shm"
 	kataEphemeralDevType = "ephemeral"
 	ephemeralPath        = filepath.Join(kataGuestSandboxDir, kataEphemeralDevType)
+	grpcMaxDataSize      = int64(1024 * 1024)
 )
 
 // KataAgentConfig is a structure storing information needed
@@ -252,7 +255,14 @@ func (k *kataAgent) configure(h hypervisor, id, sharePath string, builtin bool,
 		k.proxyBuiltIn = true
 	}
 
-	// Adding the shared volume.
+	// Neither create shared directory nor add 9p device if hypervisor
+	// doesn't support filesystem sharing.
+	caps := h.capabilities()
+	if !caps.isFsSharingSupported() {
+		return nil
+	}
+
+	// Create shared directory and add the shared volume if filesystem sharing is supported.
 	// This volume contains all bind mounted container bundles.
 	sharedVolume := Volume{
 		MountTag: mountGuest9pTag,
@@ -612,23 +622,29 @@ func (k *kataAgent) startSandbox(sandbox *Sandbox) error {
 		return err
 	}
 
-	sharedDir9pOptions = append(sharedDir9pOptions, fmt.Sprintf("msize=%d", sandbox.config.HypervisorConfig.Msize9p))
+	storages := []*grpc.Storage{}
+	caps := sandbox.hypervisor.capabilities()
 
-	// We mount the shared directory in a predefined location
+	// append 9p shared volume to storages only if filesystem sharing is supported
-	// in the guest.
+	if caps.isFsSharingSupported() {
-	// This is where at least some of the host config files
+		sharedDir9pOptions = append(sharedDir9pOptions, fmt.Sprintf("msize=%d", sandbox.config.HypervisorConfig.Msize9p))
-	// (resolv.conf, etc...) and potentially all container
+
-	// rootfs will reside.
+		// We mount the shared directory in a predefined location
-	sharedVolume := &grpc.Storage{
+		// in the guest.
-		Driver:     kata9pDevType,
+		// This is where at least some of the host config files
-		Source:     mountGuest9pTag,
+		// (resolv.conf, etc...) and potentially all container
-		MountPoint: kataGuestSharedDir,
+		// rootfs will reside.
-		Fstype:     type9pFs,
+		sharedVolume := &grpc.Storage{
-		Options:    sharedDir9pOptions,
+			Driver:     kata9pDevType,
+			Source:     mountGuest9pTag,
+			MountPoint: kataGuestSharedDir,
+			Fstype:     type9pFs,
+			Options:    sharedDir9pOptions,
+		}
+
+		storages = append(storages, sharedVolume)
 	}
 
-	storages := []*grpc.Storage{sharedVolume}
-
 	if sandbox.shmSize > 0 {
 		path := filepath.Join(kataGuestSandboxDir, shmDir)
 		shmSizeOption := fmt.Sprintf("size=%d", sandbox.shmSize)
@@ -1490,6 +1506,9 @@ func (k *kataAgent) installReqFunc(c *kataclient.AgentClient) {
 	k.reqHandlers["grpc.GuestDetailsRequest"] = func(ctx context.Context, req interface{}, opts ...golangGrpc.CallOption) (interface{}, error) {
 		return k.client.GetGuestDetails(ctx, req.(*grpc.GuestDetailsRequest), opts...)
 	}
+	k.reqHandlers["grpc.CopyFileRequest"] = func(ctx context.Context, req interface{}, opts ...golangGrpc.CallOption) (interface{}, error) {
+		return k.client.CopyFile(ctx, req.(*grpc.CopyFileRequest), opts...)
+	}
 	k.reqHandlers["grpc.SetGuestDateTimeRequest"] = func(ctx context.Context, req interface{}, opts ...golangGrpc.CallOption) (interface{}, error) {
 		return k.client.SetGuestDateTime(ctx, req.(*grpc.SetGuestDateTimeRequest), opts...)
 	}
@@ -1708,3 +1727,56 @@ func (k *kataAgent) convertToRoutes(aRoutes []*aTypes.Route) (routes []*types.Ro
 
 	return routes
 }
+
+func (k *kataAgent) copyFile(src, dst string) error {
+	var st unix.Stat_t
+
+	err := unix.Stat(src, &st)
+	if err != nil {
+		return fmt.Errorf("Could not get file %s information: %v", src, err)
+	}
+
+	b, err := ioutil.ReadFile(src)
+	if err != nil {
+		return fmt.Errorf("Could not read file %s: %v", src, err)
+	}
+
+	fileSize := int64(len(b))
+
+	k.Logger().WithFields(logrus.Fields{
+		"source": src,
+		"dest":   dst,
+	}).Debugf("Copying file from host to guest")
+
+	cpReq := &grpc.CopyFileRequest{
+		Path:     dst,
+		DirMode:  uint32(dirMode),
+		FileMode: st.Mode,
+		FileSize: fileSize,
+		Uid:      int32(st.Uid),
+		Gid:      int32(st.Gid),
+	}
+
+	// Copy file by parts if it's needed
+	remainingBytes := fileSize
+	offset := int64(0)
+	for remainingBytes > 0 {
+		bytesToCopy := int64(len(b))
+		if bytesToCopy > grpcMaxDataSize {
+			bytesToCopy = grpcMaxDataSize
+		}
+
+		cpReq.Data = b[:bytesToCopy]
+		cpReq.Offset = offset
+
+		if _, err = k.sendReq(cpReq); err != nil {
+			return fmt.Errorf("Could not send CopyFile request: %v", err)
+		}
+
+		b = b[bytesToCopy:]
+		remainingBytes -= bytesToCopy
+		offset += grpcMaxDataSize
+	}
+
+	return nil
+}

virtcontainers/kata_agent_test.go

@@ -247,6 +247,10 @@ func (p *gRPCProxy) SetGuestDateTime(ctx context.Context, req *pb.SetGuestDateTi
 	return &gpb.Empty{}, nil
 }
 
+func (p *gRPCProxy) CopyFile(ctx context.Context, req *pb.CopyFileRequest) (*gpb.Empty, error) {
+	return &gpb.Empty{}, nil
+}
+
 func gRPCRegister(s *grpc.Server, srv interface{}) {
 	switch g := srv.(type) {
 	case *gRPCProxy:
@@ -844,3 +848,55 @@ func TestKataGetAgentUrl(t *testing.T) {
 	assert.NotEmpty(url)
 
 }
+
+func TestKataCopyFile(t *testing.T) {
+	assert := assert.New(t)
+
+	impl := &gRPCProxy{}
+
+	proxy := mock.ProxyGRPCMock{
+		GRPCImplementer: impl,
+		GRPCRegister:    gRPCRegister,
+	}
+
+	sockDir, err := testGenerateKataProxySockDir()
+	assert.NoError(err)
+	defer os.RemoveAll(sockDir)
+
+	testKataProxyURL := fmt.Sprintf(testKataProxyURLTempl, sockDir)
+	err = proxy.Start(testKataProxyURL)
+	assert.NoError(err)
+	defer proxy.Stop()
+
+	k := &kataAgent{
+		state: KataAgentState{
+			URL: testKataProxyURL,
+		},
+	}
+
+	err = k.copyFile("/abc/xyz/123", "/tmp")
+	assert.Error(err)
+
+	src, err := ioutil.TempFile("", "src")
+	assert.NoError(err)
+	defer os.Remove(src.Name())
+
+	data := []byte("abcdefghi123456789")
+	_, err = src.Write(data)
+	assert.NoError(err)
+	assert.NoError(src.Close())
+
+	dst, err := ioutil.TempFile("", "dst")
+	assert.NoError(err)
+	assert.NoError(dst.Close())
+	defer os.Remove(dst.Name())
+
+	orgGrpcMaxDataSize := grpcMaxDataSize
+	grpcMaxDataSize = 1
+	defer func() {
+		grpcMaxDataSize = orgGrpcMaxDataSize
+	}()
+
+	err = k.copyFile(src.Name(), dst.Name())
+	assert.NoError(err)
+}

virtcontainers/noop_agent.go

@@ -209,3 +209,8 @@ func (n *noopAgent) getGuestDetails(*grpc.GuestDetailsRequest) (*grpc.GuestDetai
 func (n *noopAgent) setGuestDateTime(time.Time) error {
 	return nil
 }
+
+// copyFile is the Noop agent copy file. It does nothing.
+func (n *noopAgent) copyFile(src, dst string) error {
+	return nil
+}

virtcontainers/noop_agent_test.go

@@ -272,3 +272,11 @@ func TestNoopGetAgentUrl(t *testing.T) {
 	assert.Nil(err)
 	assert.Empty(url)
 }
+
+func TestNoopCopyFile(t *testing.T) {
+	assert := assert.New(t)
+	n := &noopAgent{}
+
+	err := n.copyFile("", "")
+	assert.Nil(err)
+}