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date: 2016-09-11/21:30

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This commit is contained in:
Lei Xue
2016-09-11 21:35:17 +08:00
parent 11aad6c253
commit 3fc1973593
4 changed files with 172 additions and 32 deletions
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38
pkg/port/iscsit/cmd.go
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@@ -90,6 +90,10 @@ type ISCSICommand struct {
Status byte
SCSIResponse byte
// R2T
R2TSN uint32
DesiredLength uint32
// Data-In/Out
HasStatus bool
DataSN uint32
@@ -112,6 +116,8 @@ func (cmd *ISCSICommand) Bytes() []byte {
return cmd.noopInBytes()
case OpSCSITaskResp:
return cmd.scsiTMFRespBytes()
case OpReady:
return cmd.r2tRespBytes()
}
return nil
}
@@ -139,7 +145,7 @@ func (m *ISCSICommand) String() string {
s = append(s, fmt.Sprintf("Next Stage = %v", m.NSG))
s = append(s, fmt.Sprintf("Status Class = %d", m.StatusClass))
s = append(s, fmt.Sprintf("Status Detail = %d", m.StatusDetail))
case OpSCSICmd:
case OpSCSICmd, OpSCSIOut:
s = append(s, fmt.Sprintf("LUN = %d", m.LUN))
s = append(s, fmt.Sprintf("ExpectedDataLen = %d", m.ExpectedDataLen))
s = append(s, fmt.Sprintf("CmdSN = %d", m.CmdSN))
@@ -397,3 +403,33 @@ func (m *ISCSICommand) scsiTMFRespBytes() []byte {
return buf.Bytes()
}
func (m *ISCSICommand) r2tRespBytes() []byte {
// rfc7143 11.8
buf := &bytes.Buffer{}
buf.WriteByte(byte(OpReady))
var b byte
if m.Final {
b |= 0x80
}
buf.WriteByte(b)
buf.WriteByte(0x00)
buf.WriteByte(0x00)
// Skip through to byte 16
for i := 0; i < 3*4; i++ {
buf.WriteByte(0x00)
}
buf.Write(util.MarshalUint64(uint64(m.TaskTag))[4:])
for i := 0; i < 4; i++ {
buf.WriteByte(0x00)
}
buf.Write(util.MarshalUint64(uint64(m.StatSN))[4:])
buf.Write(util.MarshalUint64(uint64(m.ExpCmdSN))[4:])
buf.Write(util.MarshalUint64(uint64(m.MaxCmdSN))[4:])
buf.Write(util.MarshalUint64(uint64(m.R2TSN))[4:])
buf.Write(util.MarshalUint64(uint64(m.BufferOffset))[4:])
buf.Write(util.MarshalUint64(uint64(m.DesiredLength))[4:])
return buf.Bytes()
}