diff options
Diffstat (limited to 'pkg/sentry/socket/netlink/socket.go')
| -rw-r--r-- | pkg/sentry/socket/netlink/socket.go | 72 |
1 files changed, 43 insertions, 29 deletions
diff --git a/pkg/sentry/socket/netlink/socket.go b/pkg/sentry/socket/netlink/socket.go index 2ca02567d..81f34c5a2 100644 --- a/pkg/sentry/socket/netlink/socket.go +++ b/pkg/sentry/socket/netlink/socket.go @@ -58,6 +58,8 @@ var errNoFilter = syserr.New("no filter attached", linux.ENOENT) // netlinkSocketDevice is the netlink socket virtual device. var netlinkSocketDevice = device.NewAnonDevice() +// LINT.IfChange + // Socket is the base socket type for netlink sockets. // // This implementation only supports userspace sending and receiving messages @@ -74,6 +76,14 @@ type Socket struct { fsutil.FileNoSplice `state:"nosave"` fsutil.FileNoopFlush `state:"nosave"` fsutil.FileUseInodeUnstableAttr `state:"nosave"` + + socketOpsCommon +} + +// socketOpsCommon contains the socket operations common to VFS1 and VFS2. +// +// +stateify savable +type socketOpsCommon struct { socket.SendReceiveTimeout // ports provides netlink port allocation. @@ -140,17 +150,19 @@ func NewSocket(t *kernel.Task, skType linux.SockType, protocol Protocol) (*Socke } return &Socket{ - ports: t.Kernel().NetlinkPorts(), - protocol: protocol, - skType: skType, - ep: ep, - connection: connection, - sendBufferSize: defaultSendBufferSize, + socketOpsCommon: socketOpsCommon{ + ports: t.Kernel().NetlinkPorts(), + protocol: protocol, + skType: skType, + ep: ep, + connection: connection, + sendBufferSize: defaultSendBufferSize, + }, }, nil } // Release implements fs.FileOperations.Release. -func (s *Socket) Release() { +func (s *socketOpsCommon) Release() { s.connection.Release() s.ep.Close() @@ -160,7 +172,7 @@ func (s *Socket) Release() { } // Readiness implements waiter.Waitable.Readiness. -func (s *Socket) Readiness(mask waiter.EventMask) waiter.EventMask { +func (s *socketOpsCommon) Readiness(mask waiter.EventMask) waiter.EventMask { // ep holds messages to be read and thus handles EventIn readiness. ready := s.ep.Readiness(mask) @@ -174,18 +186,18 @@ func (s *Socket) Readiness(mask waiter.EventMask) waiter.EventMask { } // EventRegister implements waiter.Waitable.EventRegister. -func (s *Socket) EventRegister(e *waiter.Entry, mask waiter.EventMask) { +func (s *socketOpsCommon) EventRegister(e *waiter.Entry, mask waiter.EventMask) { s.ep.EventRegister(e, mask) // Writable readiness never changes, so no registration is needed. } // EventUnregister implements waiter.Waitable.EventUnregister. -func (s *Socket) EventUnregister(e *waiter.Entry) { +func (s *socketOpsCommon) EventUnregister(e *waiter.Entry) { s.ep.EventUnregister(e) } // Passcred implements transport.Credentialer.Passcred. -func (s *Socket) Passcred() bool { +func (s *socketOpsCommon) Passcred() bool { s.mu.Lock() passcred := s.passcred s.mu.Unlock() @@ -193,7 +205,7 @@ func (s *Socket) Passcred() bool { } // ConnectedPasscred implements transport.Credentialer.ConnectedPasscred. -func (s *Socket) ConnectedPasscred() bool { +func (s *socketOpsCommon) ConnectedPasscred() bool { // This socket is connected to the kernel, which doesn't need creds. // // This is arbitrary, as ConnectedPasscred on this type has no callers. @@ -227,7 +239,7 @@ func ExtractSockAddr(b []byte) (*linux.SockAddrNetlink, *syserr.Error) { // port of 0 defaults to the ThreadGroup ID. // // Preconditions: mu is held. -func (s *Socket) bindPort(t *kernel.Task, port int32) *syserr.Error { +func (s *socketOpsCommon) bindPort(t *kernel.Task, port int32) *syserr.Error { if s.bound { // Re-binding is only allowed if the port doesn't change. if port != s.portID { @@ -251,7 +263,7 @@ func (s *Socket) bindPort(t *kernel.Task, port int32) *syserr.Error { } // Bind implements socket.Socket.Bind. -func (s *Socket) Bind(t *kernel.Task, sockaddr []byte) *syserr.Error { +func (s *socketOpsCommon) Bind(t *kernel.Task, sockaddr []byte) *syserr.Error { a, err := ExtractSockAddr(sockaddr) if err != nil { return err @@ -269,7 +281,7 @@ func (s *Socket) Bind(t *kernel.Task, sockaddr []byte) *syserr.Error { } // Connect implements socket.Socket.Connect. -func (s *Socket) Connect(t *kernel.Task, sockaddr []byte, blocking bool) *syserr.Error { +func (s *socketOpsCommon) Connect(t *kernel.Task, sockaddr []byte, blocking bool) *syserr.Error { a, err := ExtractSockAddr(sockaddr) if err != nil { return err @@ -300,25 +312,25 @@ func (s *Socket) Connect(t *kernel.Task, sockaddr []byte, blocking bool) *syserr } // Accept implements socket.Socket.Accept. -func (s *Socket) Accept(t *kernel.Task, peerRequested bool, flags int, blocking bool) (int32, linux.SockAddr, uint32, *syserr.Error) { +func (s *socketOpsCommon) Accept(t *kernel.Task, peerRequested bool, flags int, blocking bool) (int32, linux.SockAddr, uint32, *syserr.Error) { // Netlink sockets never support accept. return 0, nil, 0, syserr.ErrNotSupported } // Listen implements socket.Socket.Listen. -func (s *Socket) Listen(t *kernel.Task, backlog int) *syserr.Error { +func (s *socketOpsCommon) Listen(t *kernel.Task, backlog int) *syserr.Error { // Netlink sockets never support listen. return syserr.ErrNotSupported } // Shutdown implements socket.Socket.Shutdown. -func (s *Socket) Shutdown(t *kernel.Task, how int) *syserr.Error { +func (s *socketOpsCommon) Shutdown(t *kernel.Task, how int) *syserr.Error { // Netlink sockets never support shutdown. return syserr.ErrNotSupported } // GetSockOpt implements socket.Socket.GetSockOpt. -func (s *Socket) GetSockOpt(t *kernel.Task, level int, name int, outPtr usermem.Addr, outLen int) (interface{}, *syserr.Error) { +func (s *socketOpsCommon) GetSockOpt(t *kernel.Task, level int, name int, outPtr usermem.Addr, outLen int) (interface{}, *syserr.Error) { switch level { case linux.SOL_SOCKET: switch name { @@ -369,7 +381,7 @@ func (s *Socket) GetSockOpt(t *kernel.Task, level int, name int, outPtr usermem. } // SetSockOpt implements socket.Socket.SetSockOpt. -func (s *Socket) SetSockOpt(t *kernel.Task, level int, name int, opt []byte) *syserr.Error { +func (s *socketOpsCommon) SetSockOpt(t *kernel.Task, level int, name int, opt []byte) *syserr.Error { switch level { case linux.SOL_SOCKET: switch name { @@ -466,7 +478,7 @@ func (s *Socket) SetSockOpt(t *kernel.Task, level int, name int, opt []byte) *sy } // GetSockName implements socket.Socket.GetSockName. -func (s *Socket) GetSockName(t *kernel.Task) (linux.SockAddr, uint32, *syserr.Error) { +func (s *socketOpsCommon) GetSockName(t *kernel.Task) (linux.SockAddr, uint32, *syserr.Error) { s.mu.Lock() defer s.mu.Unlock() @@ -478,7 +490,7 @@ func (s *Socket) GetSockName(t *kernel.Task) (linux.SockAddr, uint32, *syserr.Er } // GetPeerName implements socket.Socket.GetPeerName. -func (s *Socket) GetPeerName(t *kernel.Task) (linux.SockAddr, uint32, *syserr.Error) { +func (s *socketOpsCommon) GetPeerName(t *kernel.Task) (linux.SockAddr, uint32, *syserr.Error) { sa := &linux.SockAddrNetlink{ Family: linux.AF_NETLINK, // TODO(b/68878065): Support non-kernel peers. For now the peer @@ -489,7 +501,7 @@ func (s *Socket) GetPeerName(t *kernel.Task) (linux.SockAddr, uint32, *syserr.Er } // RecvMsg implements socket.Socket.RecvMsg. -func (s *Socket) RecvMsg(t *kernel.Task, dst usermem.IOSequence, flags int, haveDeadline bool, deadline ktime.Time, senderRequested bool, controlDataLen uint64) (int, int, linux.SockAddr, uint32, socket.ControlMessages, *syserr.Error) { +func (s *socketOpsCommon) RecvMsg(t *kernel.Task, dst usermem.IOSequence, flags int, haveDeadline bool, deadline ktime.Time, senderRequested bool, controlDataLen uint64) (int, int, linux.SockAddr, uint32, socket.ControlMessages, *syserr.Error) { from := &linux.SockAddrNetlink{ Family: linux.AF_NETLINK, PortID: 0, @@ -590,7 +602,7 @@ func (kernelSCM) Credentials(*kernel.Task) (kernel.ThreadID, auth.UID, auth.GID) var kernelCreds = &kernelSCM{} // sendResponse sends the response messages in ms back to userspace. -func (s *Socket) sendResponse(ctx context.Context, ms *MessageSet) *syserr.Error { +func (s *socketOpsCommon) sendResponse(ctx context.Context, ms *MessageSet) *syserr.Error { // Linux combines multiple netlink messages into a single datagram. bufs := make([][]byte, 0, len(ms.Messages)) for _, m := range ms.Messages { @@ -666,7 +678,7 @@ func dumpAckMesage(hdr linux.NetlinkMessageHeader, ms *MessageSet) { // processMessages handles each message in buf, passing it to the protocol // handler for final handling. -func (s *Socket) processMessages(ctx context.Context, buf []byte) *syserr.Error { +func (s *socketOpsCommon) processMessages(ctx context.Context, buf []byte) *syserr.Error { for len(buf) > 0 { msg, rest, ok := ParseMessage(buf) if !ok { @@ -698,7 +710,7 @@ func (s *Socket) processMessages(ctx context.Context, buf []byte) *syserr.Error } // sendMsg is the core of message send, used for SendMsg and Write. -func (s *Socket) sendMsg(ctx context.Context, src usermem.IOSequence, to []byte, flags int, controlMessages socket.ControlMessages) (int, *syserr.Error) { +func (s *socketOpsCommon) sendMsg(ctx context.Context, src usermem.IOSequence, to []byte, flags int, controlMessages socket.ControlMessages) (int, *syserr.Error) { dstPort := int32(0) if len(to) != 0 { @@ -745,7 +757,7 @@ func (s *Socket) sendMsg(ctx context.Context, src usermem.IOSequence, to []byte, } // SendMsg implements socket.Socket.SendMsg. -func (s *Socket) SendMsg(t *kernel.Task, src usermem.IOSequence, to []byte, flags int, haveDeadline bool, deadline ktime.Time, controlMessages socket.ControlMessages) (int, *syserr.Error) { +func (s *socketOpsCommon) SendMsg(t *kernel.Task, src usermem.IOSequence, to []byte, flags int, haveDeadline bool, deadline ktime.Time, controlMessages socket.ControlMessages) (int, *syserr.Error) { return s.sendMsg(t, src, to, flags, controlMessages) } @@ -756,11 +768,13 @@ func (s *Socket) Write(ctx context.Context, _ *fs.File, src usermem.IOSequence, } // State implements socket.Socket.State. -func (s *Socket) State() uint32 { +func (s *socketOpsCommon) State() uint32 { return s.ep.State() } // Type implements socket.Socket.Type. -func (s *Socket) Type() (family int, skType linux.SockType, protocol int) { +func (s *socketOpsCommon) Type() (family int, skType linux.SockType, protocol int) { return linux.AF_NETLINK, s.skType, s.protocol.Protocol() } + +// LINT.ThenChange(./socket_vfs2.go) |