125 lines
3.1 KiB
Go
125 lines
3.1 KiB
Go
/*
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Copyright 2016 The GoStor Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package scsi
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import (
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"fmt"
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"unsafe"
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"github.com/google/uuid"
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"github.com/gostor/gotgt/pkg/api"
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log "github.com/sirupsen/logrus"
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)
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func (s *SCSITargetService) NewSCSITarget(tid int, driverName, name string) (*api.SCSITarget, error) {
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// verify the target ID
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// verify the target's Name
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// verify the low level driver
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var target = &api.SCSITarget{
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Name: name,
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TID: tid,
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TargetPortGroups: []*api.TargetPortGroup{},
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ITNexus: make(map[uuid.UUID]*api.ITNexus),
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}
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tpg := &api.TargetPortGroup{GroupID: 0, TargetPortGroup: []*api.SCSITargetPort{}}
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s.Targets = append(s.Targets, target)
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target.Devices = GetTargetLUNMap(target.Name)
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target.LUN0 = NewLUN0()
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target.TargetPortGroups = append(target.TargetPortGroups, tpg)
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return target, nil
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}
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func (s *SCSITargetService) RereadTargetLUNMap() {
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s.mutex.Lock()
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defer s.mutex.Unlock()
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for _, tgt := range s.Targets {
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tgt.Devices = GetTargetLUNMap(tgt.Name)
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}
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}
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func FindTargetGroup(target *api.SCSITarget, relPortID uint16) uint16 {
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for _, tpg := range target.TargetPortGroups {
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for _, port := range tpg.TargetPortGroup {
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if port.RelativeTargetPortID == relPortID {
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return tpg.GroupID
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}
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}
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}
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return 0
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}
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func FindTargetPort(target *api.SCSITarget, relPortID uint16) *api.SCSITargetPort {
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for _, tpg := range target.TargetPortGroups {
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for _, port := range tpg.TargetPortGroup {
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if port.RelativeTargetPortID == relPortID {
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return port
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}
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}
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}
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return nil
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}
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func AddITNexus(target *api.SCSITarget, itnexus *api.ITNexus) bool {
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var ret bool = true
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target.ITNexusMutex.Lock()
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defer target.ITNexusMutex.Unlock()
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if _, ok := target.ITNexus[itnexus.ID]; !ok {
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target.ITNexus[itnexus.ID] = itnexus
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ret = true
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} else {
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ret = false
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}
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return ret
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}
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func RemoveITNexus(target *api.SCSITarget, itnexus *api.ITNexus) {
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target.ITNexusMutex.Lock()
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defer target.ITNexusMutex.Unlock()
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delete(target.ITNexus, itnexus.ID)
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}
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func deviceReserve(cmd *api.SCSICommand) error {
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var lu *api.SCSILu
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lun := *(*uint64)(unsafe.Pointer(&cmd.Lun))
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for tgtLUN, lunDev := range cmd.Target.Devices {
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if tgtLUN == lun {
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lu = lunDev
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break
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}
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}
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if lu == nil {
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log.Errorf("invalid target and lun %d %d", cmd.Target.TID, lun)
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return nil
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}
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if lu.ReserveID != uuid.Nil && lu.ReserveID == cmd.ITNexusID {
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log.Errorf("already reserved %d, %d", lu.ReserveID, cmd.ITNexusID)
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return fmt.Errorf("already reserved")
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}
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lu.ReserveID = cmd.ITNexusID
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return nil
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}
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func deviceRelease(tid int, itn uuid.UUID, lun uint64, force bool) error {
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// TODO
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return nil
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}
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