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perf2

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This commit is contained in:
Lei Xue
2017-08-02 19:01:41 +08:00
parent 4ae643e9f8
commit fcb96b323d
6 changed files with 91 additions and 101 deletions
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63
pkg/port/iscsit/cmd.go
View File

@@ -278,7 +278,7 @@ func parseHeader(data []byte) (*ISCSICommand, error) {
func (m *ISCSICommand) scsiCmdRespBytes() []byte {
// rfc7143 11.4
buf := &bytes.Buffer{}
buf := bytes.Buffer{}
buf.WriteByte(byte(OpSCSIResp))
var flag byte = 0x80
if m.Resid > 0 {
@@ -321,8 +321,12 @@ func (m *ISCSICommand) scsiCmdRespBytes() []byte {
func (m *ISCSICommand) dataInBytes() []byte {
// rfc7143 11.7
buf := &bytes.Buffer{}
buf.WriteByte(byte(OpSCSIIn))
dl := m.DataLen
for dl%4 > 0 {
dl++
}
var buf = make([]byte, (48 + dl))
buf[0] = byte(OpSCSIIn)
var flag byte
if m.FinalInSeq || m.Final == true {
flag |= 0x80
@@ -338,44 +342,29 @@ func (m *ISCSICommand) dataInBytes() []byte {
flag |= 0x02
}
}
buf.WriteByte(flag)
buf.WriteByte(0x00)
buf[1] = flag
//buf.WriteByte(0x00)
if m.HasStatus && m.Final == true {
flag = byte(m.Status)
}
buf.WriteByte(flag)
buf.WriteByte(0x00) // 4
buf.Write(util.MarshalUint64(uint64(m.DataLen))[5:]) // 5-8
//buf.WriteByte(flag)
buf[3] = flag
copy(buf[5:], util.MarshalUint64(uint64(m.DataLen))[5:])
// Skip through to byte 16 Since A bit is not set 11.7.4
for i := 0; i < 8; i++ {
buf.WriteByte(0x00)
}
buf.Write(util.MarshalUint64(uint64(m.TaskTag))[4:])
for i := 0; i < 4; i++ {
// 11.7.4
buf.WriteByte(0xff)
}
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.DataSN))[4:])
buf.Write(util.MarshalUint64(uint64(m.BufferOffset))[4:])
buf.Write(util.MarshalUint64(uint64(m.Resid))[4:])
buf.Write(m.RawData[m.BufferOffset : m.BufferOffset+uint32(m.DataLen)])
dl := m.DataLen
for dl%4 > 0 {
dl++
buf.WriteByte(0x00)
}
copy(buf[16:], util.MarshalUint32(m.TaskTag))
copy(buf[24:], util.MarshalUint32(m.StatSN))
copy(buf[28:], util.MarshalUint32(m.ExpCmdSN))
copy(buf[32:], util.MarshalUint32(m.MaxCmdSN))
copy(buf[36:], util.MarshalUint32(m.DataSN))
copy(buf[40:], util.MarshalUint32(m.BufferOffset))
copy(buf[44:], util.MarshalUint32(m.Resid))
copy(buf[48:], m.RawData[m.BufferOffset:m.BufferOffset+uint32(m.DataLen)])
return buf.Bytes()
return buf
}
func (m *ISCSICommand) textRespBytes() []byte {
buf := &bytes.Buffer{}
buf := bytes.Buffer{}
buf.WriteByte(byte(OpTextResp))
var b byte
if m.Final {
@@ -415,8 +404,7 @@ func (m *ISCSICommand) textRespBytes() []byte {
}
func (m *ISCSICommand) noopInBytes() []byte {
buf := &bytes.Buffer{}
buf := bytes.Buffer{}
buf.WriteByte(byte(OpNoopIn))
var b byte
b |= 0x80
@@ -452,7 +440,7 @@ func (m *ISCSICommand) noopInBytes() []byte {
func (m *ISCSICommand) scsiTMFRespBytes() []byte {
// rfc7143 11.6
buf := &bytes.Buffer{}
buf := bytes.Buffer{}
buf.WriteByte(byte(OpSCSITaskResp))
buf.WriteByte(0x80)
buf.WriteByte(m.Result)
@@ -477,9 +465,8 @@ func (m *ISCSICommand) scsiTMFRespBytes() []byte {
}
func (m *ISCSICommand) r2tRespBytes() []byte {
// rfc7143 11.8
buf := &bytes.Buffer{}
buf := bytes.Buffer{}
buf.WriteByte(byte(OpReady))
var b byte
if m.Final {

69
pkg/port/iscsit/conn.go
View File

@@ -155,7 +155,7 @@ func (conn *iscsiConnection) buildRespPackage(oc OpCode, task *iscsiTask) error
if task == nil {
task = conn.rxTask
}
resp := &ISCSICommand{
conn.resp = &ISCSICommand{
StatSN: conn.req.ExpStatSN,
TaskTag: conn.req.TaskTag,
ExpCmdSN: conn.session.ExpCmdSN,
@@ -164,55 +164,55 @@ func (conn *iscsiConnection) buildRespPackage(oc OpCode, task *iscsiTask) error
}
switch oc {
case OpReady:
resp.OpCode = OpReady
resp.R2TSN = task.r2tSN
resp.BufferOffset = uint32(task.offset)
resp.DesiredLength = uint32(task.r2tCount)
conn.resp.OpCode = OpReady
conn.resp.R2TSN = task.r2tSN
conn.resp.BufferOffset = uint32(task.offset)
conn.resp.DesiredLength = uint32(task.r2tCount)
if val := conn.loginParam.sessionParam[ISCSI_PARAM_MAX_BURST].Value; task.r2tCount > int(val) {
resp.DesiredLength = uint32(val)
conn.resp.DesiredLength = uint32(val)
}
case OpSCSIIn, OpSCSIResp:
resp.OpCode = oc
resp.Immediate = true
resp.Final = true
resp.SCSIResponse = 0x00
resp.HasStatus = true
conn.resp.OpCode = oc
conn.resp.Immediate = true
conn.resp.Final = true
conn.resp.SCSIResponse = 0x00
conn.resp.HasStatus = true
scmd := task.scmd
resp.Status = scmd.Result
conn.resp.Status = scmd.Result
if scmd.Result != 0 && scmd.SenseBuffer != nil {
length := util.MarshalUint32(scmd.SenseBuffer.Length)
resp.RawData = append(length[2:4], scmd.SenseBuffer.Buffer...)
conn.resp.RawData = append(length[2:4], scmd.SenseBuffer.Buffer...)
} else if scmd.Direction == api.SCSIDataRead || scmd.Direction == api.SCSIDataWrite {
if scmd.InSDBBuffer != nil {
resp.Resid = scmd.InSDBBuffer.Resid
if resp.Resid != 0 && resp.Resid < scmd.InSDBBuffer.Length {
resp.RawData = scmd.InSDBBuffer.Buffer[:resp.Resid]
conn.resp.Resid = scmd.InSDBBuffer.Resid
if conn.resp.Resid != 0 && conn.resp.Resid < scmd.InSDBBuffer.Length {
conn.resp.RawData = scmd.InSDBBuffer.Buffer[:conn.resp.Resid]
} else {
resp.RawData = scmd.InSDBBuffer.Buffer
conn.resp.RawData = scmd.InSDBBuffer.Buffer
}
} else {
resp.RawData = []byte{}
conn.resp.RawData = []byte{}
}
}
case OpNoopIn, OpReject:
resp.OpCode = oc
resp.Final = true
resp.NSG = FullFeaturePhase
resp.ExpCmdSN = conn.req.CmdSN + 1
conn.resp.OpCode = oc
conn.resp.Final = true
conn.resp.NSG = FullFeaturePhase
conn.resp.ExpCmdSN = conn.req.CmdSN + 1
case OpSCSITaskResp:
resp.OpCode = oc
resp.Final = true
resp.NSG = FullFeaturePhase
resp.ExpCmdSN = conn.req.CmdSN + 1
resp.Result = task.result
conn.resp.OpCode = oc
conn.resp.Final = true
conn.resp.NSG = FullFeaturePhase
conn.resp.ExpCmdSN = conn.req.CmdSN + 1
conn.resp.Result = task.result
case OpLoginResp:
resp.OpCode = OpLoginResp
resp.Transit = conn.loginParam.tgtTrans
resp.CSG = conn.req.CSG
resp.NSG = conn.loginParam.tgtNSG
resp.ExpCmdSN = conn.req.CmdSN
resp.MaxCmdSN = conn.req.CmdSN
conn.resp.OpCode = OpLoginResp
conn.resp.Transit = conn.loginParam.tgtTrans
conn.resp.CSG = conn.req.CSG
conn.resp.NSG = conn.loginParam.tgtNSG
conn.resp.ExpCmdSN = conn.req.CmdSN
conn.resp.MaxCmdSN = conn.req.CmdSN
negoKeys, err := conn.processLoginData()
if err != nil {
return err
@@ -221,11 +221,10 @@ func (conn *iscsiConnection) buildRespPackage(oc OpCode, task *iscsiTask) error
negoKeys = loginKVDeclare(conn, negoKeys)
conn.loginParam.keyDeclared = true
}
resp.RawData = util.MarshalKVText(negoKeys)
conn.resp.RawData = util.MarshalKVText(negoKeys)
conn.txTask = nil
}
conn.resp = resp
return nil
}

12
pkg/port/iscsit/iscsid.go
View File

@@ -156,7 +156,6 @@ func (s *ISCSITargetDriver) Run() error {
log.Error(err)
os.Exit(1)
}
defer l.Close()
for {
log.Info("Listening ...")
@@ -178,6 +177,7 @@ func (s *ISCSITargetDriver) Run() error {
// start a new thread to do with this command
go s.handler(DATAIN, iscsiConn)
}
l.Close()
return nil
}
@@ -476,10 +476,12 @@ SendRemainingData:
for {
switch conn.txIOState {
case IOSTATE_TX_BHS:
log.Debug("ready to write response")
log.Debugf("response is %s", resp.String())
if log.GetLevel() == log.DebugLevel {
log.Debug("ready to write response")
log.Debugf("response is %s", resp.String())
}
if l, err := conn.write(resp.Bytes()); err != nil {
log.Error(err)
log.Errorf("failed to write data to client: %v", err)
return
} else {
conn.txIOState = IOSTATE_TX_INIT_AHS
@@ -538,7 +540,7 @@ SendRemainingData:
case CONN_STATE_SCSI:
conn.txTask = nil
default:
log.Warnf("unexpected connection state: %d", conn.state)
log.Warnf("unexpected connection state: %v", conn.State())
conn.rxIOState = IOSTATE_RX_BHS
s.handler(DATAIN, conn)
}