VOL-381 add unum container to support ONOS cluster formation under swarm
Change-Id: Ic260edda19bb199ed040f05164ab605f28c919d0
diff --git a/unum/vendor/github.com/Microsoft/go-winio/reparse.go b/unum/vendor/github.com/Microsoft/go-winio/reparse.go
new file mode 100644
index 0000000..fc1ee4d
--- /dev/null
+++ b/unum/vendor/github.com/Microsoft/go-winio/reparse.go
@@ -0,0 +1,128 @@
+package winio
+
+import (
+ "bytes"
+ "encoding/binary"
+ "fmt"
+ "strings"
+ "unicode/utf16"
+ "unsafe"
+)
+
+const (
+ reparseTagMountPoint = 0xA0000003
+ reparseTagSymlink = 0xA000000C
+)
+
+type reparseDataBuffer struct {
+ ReparseTag uint32
+ ReparseDataLength uint16
+ Reserved uint16
+ SubstituteNameOffset uint16
+ SubstituteNameLength uint16
+ PrintNameOffset uint16
+ PrintNameLength uint16
+}
+
+// ReparsePoint describes a Win32 symlink or mount point.
+type ReparsePoint struct {
+ Target string
+ IsMountPoint bool
+}
+
+// UnsupportedReparsePointError is returned when trying to decode a non-symlink or
+// mount point reparse point.
+type UnsupportedReparsePointError struct {
+ Tag uint32
+}
+
+func (e *UnsupportedReparsePointError) Error() string {
+ return fmt.Sprintf("unsupported reparse point %x", e.Tag)
+}
+
+// DecodeReparsePoint decodes a Win32 REPARSE_DATA_BUFFER structure containing either a symlink
+// or a mount point.
+func DecodeReparsePoint(b []byte) (*ReparsePoint, error) {
+ tag := binary.LittleEndian.Uint32(b[0:4])
+ return DecodeReparsePointData(tag, b[8:])
+}
+
+func DecodeReparsePointData(tag uint32, b []byte) (*ReparsePoint, error) {
+ isMountPoint := false
+ switch tag {
+ case reparseTagMountPoint:
+ isMountPoint = true
+ case reparseTagSymlink:
+ default:
+ return nil, &UnsupportedReparsePointError{tag}
+ }
+ nameOffset := 8 + binary.LittleEndian.Uint16(b[4:6])
+ if !isMountPoint {
+ nameOffset += 4
+ }
+ nameLength := binary.LittleEndian.Uint16(b[6:8])
+ name := make([]uint16, nameLength/2)
+ err := binary.Read(bytes.NewReader(b[nameOffset:nameOffset+nameLength]), binary.LittleEndian, &name)
+ if err != nil {
+ return nil, err
+ }
+ return &ReparsePoint{string(utf16.Decode(name)), isMountPoint}, nil
+}
+
+func isDriveLetter(c byte) bool {
+ return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')
+}
+
+// EncodeReparsePoint encodes a Win32 REPARSE_DATA_BUFFER structure describing a symlink or
+// mount point.
+func EncodeReparsePoint(rp *ReparsePoint) []byte {
+ // Generate an NT path and determine if this is a relative path.
+ var ntTarget string
+ relative := false
+ if strings.HasPrefix(rp.Target, `\\?\`) {
+ ntTarget = `\??\` + rp.Target[4:]
+ } else if strings.HasPrefix(rp.Target, `\\`) {
+ ntTarget = `\??\UNC\` + rp.Target[2:]
+ } else if len(rp.Target) >= 2 && isDriveLetter(rp.Target[0]) && rp.Target[1] == ':' {
+ ntTarget = `\??\` + rp.Target
+ } else {
+ ntTarget = rp.Target
+ relative = true
+ }
+
+ // The paths must be NUL-terminated even though they are counted strings.
+ target16 := utf16.Encode([]rune(rp.Target + "\x00"))
+ ntTarget16 := utf16.Encode([]rune(ntTarget + "\x00"))
+
+ size := int(unsafe.Sizeof(reparseDataBuffer{})) - 8
+ size += len(ntTarget16)*2 + len(target16)*2
+
+ tag := uint32(reparseTagMountPoint)
+ if !rp.IsMountPoint {
+ tag = reparseTagSymlink
+ size += 4 // Add room for symlink flags
+ }
+
+ data := reparseDataBuffer{
+ ReparseTag: tag,
+ ReparseDataLength: uint16(size),
+ SubstituteNameOffset: 0,
+ SubstituteNameLength: uint16((len(ntTarget16) - 1) * 2),
+ PrintNameOffset: uint16(len(ntTarget16) * 2),
+ PrintNameLength: uint16((len(target16) - 1) * 2),
+ }
+
+ var b bytes.Buffer
+ binary.Write(&b, binary.LittleEndian, &data)
+ if !rp.IsMountPoint {
+ flags := uint32(0)
+ if relative {
+ flags |= 1
+ }
+ binary.Write(&b, binary.LittleEndian, flags)
+ }
+
+ binary.Write(&b, binary.LittleEndian, ntTarget16)
+ binary.Write(&b, binary.LittleEndian, target16)
+ return b.Bytes()
+}