init target and luns from config file

pkg/scsi/lun.go

@@ -22,7 +22,7 @@ import (
 	"github.com/gostor/gotgt/pkg/api"
 )
 
-func NewSCSILu(lun uint64, target *api.SCSITarget) (*api.SCSILu, error) {
+func NewSCSILu(lun uint64, target *api.SCSITarget, file string) (*api.SCSILu, error) {
 	sbc := NewSBCDevice()
 	backing, err := NewBackingStore("file")
 	if err != nil {
@@ -35,13 +35,14 @@ func NewSCSILu(lun uint64, target *api.SCSITarget) (*api.SCSILu, error) {
 		DeviceProtocol: sbc,
 		Storage:        backing,
 		BlockShift:     api.DefaultBlockShift,
-		Size:           1024 * 1024 * 10,
 	}
 	// hack this
-	if _, err = os.Stat("/var/tmp/disk.img"); err != nil && os.IsExist(err) {
-		panic(err)
+	if finfo, err := os.Stat(file); err != nil {
+		return nil, err
+	} else {
+		lu.Size = uint64(finfo.Size())
 	}
-	f, err := backing.Open(lu, "/var/tmp/disk.img")
+	f, err := backing.Open(lu, file)
 	if err != nil {
 		return nil, err
 	}

pkg/scsi/target.go

@@ -23,7 +23,7 @@ import (
 	"github.com/gostor/gotgt/pkg/api"
 )
 
-func (s *SCSITargetService) NewSCSITarget(tid int, driverName, name string) (*api.SCSITarget, error) {
+func (s *SCSITargetService) NewSCSITarget(tid int, driverName, name string, luns []string) (*api.SCSITarget, error) {
 	// verify the target ID
 
 	// verify the target's Name
@@ -34,13 +34,17 @@ func (s *SCSITargetService) NewSCSITarget(tid int, driverName, name string) (*ap
 		TID:     tid,
 		Devices: []*api.SCSILu{},
 	}
-	lun, err := NewSCSILu(0, target)
-	if err != nil {
-		glog.Errorf("fail to create LU: %v", err)
-		return nil, err
+	var devices = []*api.SCSILu{}
+	for i, ln := range luns {
+		lun, err := NewSCSILu(uint64(i), target, ln)
+		if err != nil {
+			glog.Errorf("fail to create LU: %v", err)
+			return nil, err
+		}
+		devices = append(devices, lun)
 	}
 	s.mutex.Lock()
-	target.Devices = append(target.Devices, lun)
+	target.Devices = devices
 	s.Targets = append(s.Targets, target)
 	s.mutex.Unlock()
 	return target, nil