Method Release

pkg/sentry/socket/netstack/netstack.go:495–517

Release implements vfs.FileDescriptionImpl.Release.

(ctx context.Context)

// Release implements vfs.FileDescriptionImpl.Release.
func (s *sock) Release(ctx context.Context) {
	kernel.KernelFromContext(ctx).DeleteSocket(&s.vfsfd)
	e, ch := waiter.NewChannelEntry(waiter.EventHUp | waiter.EventErr)
	s.EventRegister(&e)
	defer s.EventUnregister(&e)

	s.Endpoint.Close()

	// SO_LINGER option is valid only for TCP. For other socket types
	// return after endpoint close.
	if family, skType, _ := s.Type(); skType == linux.SOCK_STREAM && (family == linux.AF_INET || family == linux.AF_INET6) {
		v := s.Endpoint.SocketOptions().GetLinger()
		// The case for zero timeout is handled in tcp endpoint close function.
		// Close is blocked until either:
		// 1. The endpoint state is not in any of the states: FIN-WAIT1,
		// CLOSING and LAST_ACK.
		// 2. Timeout is reached.
		if v.Enabled && v.Timeout != 0 {
			_, _ = ctx.BlockWithTimeout(ch, true, v.Timeout)
		}
	}
	s.namespace.DecRef(ctx)
}

// Epollable implements FileDescriptionImpl.Epollable.
func (s *sock) Epollable() bool {