return sense data while error

pkg/port/iscsit/iscsid.go

@@ -21,7 +21,6 @@ import (
 	"fmt"
 	"net"
 	"os"
-	"runtime/debug"
 
 	"github.com/golang/glog"
 	"github.com/gostor/gotgt/pkg/api"
@@ -362,14 +361,10 @@ func (s *ISCSITargetService) iscsiExecText(conn *iscsiConnection) error {
 	keys := util.ParseKVText(cmd.RawData)
 	if st, ok := keys["SendTargets"]; ok {
 		if st == "All" {
-
 			for name, tgt := range s.Targets {
-				glog.V(2).Infof("iscsi target:", name)
-				glog.V(2).Infof("iscsi target portals:", tgt.Portals)
+				glog.V(2).Infof("iscsi target: %v", name)
+				glog.V(2).Infof("iscsi target portals: %v", tgt.Portals)
 
-			}
-
-			for name, tgt := range s.Targets {
 				result = append(result, util.KeyValue{"TargetName", name})
 				for portal := range tgt.Portals {
 					result = append(result, util.KeyValue{"TargetAddress", portal + ",1"})
@@ -476,9 +471,7 @@ func (s *ISCSITargetService) txHandler(conn *iscsiConnection) {
 			glog.V(2).Infof("length of RawData is %d", len(conn.resp.RawData))
 			glog.V(2).Infof("length of resp is %d", len(conn.resp.Bytes()))
 			if l, err := conn.write(conn.resp.Bytes()); err != nil {
-				debug.PrintStack()
 				glog.Error(err)
-				panic(err)
 				return
 			} else {
 				conn.txIOState = IOSTATE_TX_INIT_AHS
@@ -609,6 +602,9 @@ func (s *ISCSITargetService) scsiCommandHandler(conn *iscsiConnection) (err erro
 			case api.SCSIDataNone:
 				resp.OpCode = OpSCSIResp
 			}
+			if scmd.Result != 0 && scmd.SenseBuffer != nil {
+				resp.RawData = scmd.SenseBuffer.Bytes()
+			}
 			conn.resp = resp
 		}
 	case OpSCSITaskReq:
@@ -664,7 +660,7 @@ func (s *ISCSITargetService) scsiCommandHandler(conn *iscsiConnection) (err erro
 				TaskTag:      req.TaskTag,
 				ExpCmdSN:     conn.session.ExpCmdSN,
 				MaxCmdSN:     conn.session.ExpCmdSN + 10,
-				Status:       0,
+				Status:       task.scmd.Result,
 				SCSIResponse: 0x00,
 				HasStatus:    true,
 			}

pkg/scsi/lun.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2015 The GoStor Authors All rights reserved.
+Copyright 2016 The GoStor Authors All rights reserved.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.

pkg/scsi/scsi.go

@@ -81,10 +81,9 @@ func (s *SCSITargetService) AddCommandQueue(tid int, scmd *api.SCSICommand) erro
 	scmd.Device = target.Devices[0]
 	glog.V(2).Infof("scsi opcode: 0x%x, LUN: %d:", int(scmd.SCB.Bytes()[0]), binary.LittleEndian.Uint64(scmd.Lun[:]))
 	result := scmd.Device.PerformCommand(tid, scmd)
-	scmd.Result = result.Stat
-	if result.Err != nil {
-		glog.Error(result.Err)
-		return result.Err
+	if result != api.SAMStatGood {
+		scmd.Result = result.Stat
+		glog.Warningf("%v", result.Err)
 	}
 	return nil
 }
@@ -114,10 +113,8 @@ func NewSCSIDeviceOperation(fn api.CommandFunc, sa *SCSIServiceAction, pr uint8)
 }
 
 func BuildSenseData(cmd *api.SCSICommand, key byte, asc SCSISubError) {
-	senseBuffer := cmd.SenseBuffer
-	if senseBuffer == nil {
-		senseBuffer = &bytes.Buffer{}
-	}
+	senseBuffer := &bytes.Buffer{}
+
 	if cmd.Device.Attrs.SenseFormat {
 		// descriptor format
 		// current, not deferred
@@ -144,6 +141,8 @@ func BuildSenseData(cmd *api.SCSICommand, key byte, asc SCSISubError) {
 		senseBuffer.WriteByte(byte(asc) & 0xff)
 		cmd.SenseLength = length + 8
 	}
+	cmd.Result = key
+	cmd.SenseBuffer = senseBuffer
 }
 
 func getSCSIReadWriteOffset(scb []byte) uint64 {

pkg/scsi/spc.go

@@ -146,7 +146,7 @@ func SPCInquiry(host int, cmd *api.SCSICommand) api.SAMStat {
 		b = (uint8(0) & 0x7) << 5
 		b |= uint8(0) & 0x1f
 	}
-	fmt.Println(cmd.Device.Lun, *(*uint64)(unsafe.Pointer(&cmd.Lun)))
+	glog.V(2).Infof("%v, %v", cmd.Device.Lun, *(*uint64)(unsafe.Pointer(&cmd.Lun)))
 	if cmd.Device.Lun != *(*uint64)(unsafe.Pointer(&cmd.Lun)) {
 		goto sense
 	}
@@ -237,7 +237,7 @@ func SPCReportLuns(host int, cmd *api.SCSICommand) api.SAMStat {
 	}
 
 	for lunumber, lu := range cmd.Target.Devices {
-		fmt.Println("LUN:", lunumber)
+		glog.V(2).Infof("LUN: ", lunumber)
 		if remainLength > 0 {
 			lun := lu.Lun
 			if lun > 0xff {