1 files changed, 0 insertions, 78 deletions
diff --git a/pkg/tcpip/link/sharedmem/pipe/pipe.go b/pkg/tcpip/link/sharedmem/pipe/pipe.go
deleted file mode 100644
index 74c9f0311..000000000
--- a/pkg/tcpip/link/sharedmem/pipe/pipe.go
+++ /dev/null
@@ -1,78 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Package pipe implements a shared memory ring buffer on which a single reader
-// and a single writer can operate (read/write) concurrently. The ring buffer
-// allows for data of different sizes to be written, and preserves the boundary
-// of the written data.
-//
-// Example usage is as follows:
-//
-//	wb := t.Push(20)
-//	// Write data to wb.
-//	t.Flush()
-//
-//	rb := r.Pull()
-//	// Do something with data in rb.
-//	t.Flush()
-package pipe
-
-import (
-	"math"
-)
-
-const (
-	jump           uint64 = math.MaxUint32 + 1
-	offsetMask     uint64 = math.MaxUint32
-	revolutionMask uint64 = ^offsetMask
-
-	sizeOfSlotHeader        = 8 // sizeof(uint64)
-	slotFree         uint64 = 1 << 63
-	slotSizeMask     uint64 = math.MaxUint32
-)
-
-// payloadToSlotSize calculates the total size of a slot based on its payload
-// size. The  total size is the header size, plus the payload size, plus padding
-// if necessary to make the total size a multiple of sizeOfSlotHeader.
-func payloadToSlotSize(payloadSize uint64) uint64 {
-	s := sizeOfSlotHeader + payloadSize
-	return (s + sizeOfSlotHeader - 1) &^ (sizeOfSlotHeader - 1)
-}
-
-// slotToPayloadSize calculates the payload size of a slot based on the total
-// size of the slot. This is only meant to be used when creating slots that
-// don't carry information (e.g., free slots or wrap slots).
-func slotToPayloadSize(offset uint64) uint64 {
-	return offset - sizeOfSlotHeader
-}
-
-// pipe is a basic data structure used by both (transmit & receive) ends of a
-// pipe. Indices into this pipe are split into two fields: offset, which counts
-// the number of bytes from the beginning of the buffer, and revolution, which
-// counts the number of times the index has wrapped around.
-type pipe struct {
-	buffer []byte
-}
-
-// init initializes the pipe buffer such that its size is a multiple of the size
-// of the slot header.
-func (p *pipe) init(b []byte) {
-	p.buffer = b[:len(b)&^(sizeOfSlotHeader-1)]
-}
-
-// data returns a section of the buffer starting at the given index (which may
-// include revolution information) and with the given size.
-func (p *pipe) data(idx uint64, size uint64) []byte {
-	return p.buffer[(idx&offsetMask)+sizeOfSlotHeader:][:size]
-}