90 lines
1.8 KiB
Go
90 lines
1.8 KiB
Go
/*
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Copyright 2015 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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"github.com/golang/glog"
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)
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type SCSITargetState int
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var (
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TargetOnline SCSITargetState = 1
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TargetReady SCSITargetState = 2
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)
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const (
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PR_SPECIAL = (1 << 5)
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PR_WE_FA = (1 << 4)
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PR_EA_FA = (1 << 3)
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PR_RR_FR = (1 << 2)
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PR_WE_FN = (1 << 1)
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PR_EA_FN = (1 << 0)
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)
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type ITNexus struct {
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ID uint64
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Ctime uint64
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Commands []SCSICommand
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Target *SCSITarget
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Host int
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Info string
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}
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type ITNexusLuInfo struct {
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Lu *SCSILu
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ID uint64
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Prevent int
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}
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type SCSITarget struct {
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Name string
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TID int
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LID int
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State SCSITargetState
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Devices []SCSILu
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ITNexus []ITNexus
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}
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func deviceReserve(cmd *SCSICommand) error {
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var lu *SCSILu
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for _, dev := range cmd.Target.Devices {
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if dev.Lun == cmd.Device.Lun {
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lu = &dev
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break
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}
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}
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if lu == nil {
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glog.Errorf("invalid target and lun %d %s", cmd.Target.TID, cmd.Device.Lun)
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return nil
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}
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if lu.ReserveID != 0 && lu.ReserveID != cmd.CommandITNID {
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glog.Errorf("already reserved %d, %d", lu.ReserveID, cmd.CommandITNID)
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return fmt.Errorf("already reserved")
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}
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lu.ReserveID = cmd.CommandITNID
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return nil
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}
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func deviceRelease(tid int, itn, lun uint64, force bool) error {
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// TODO
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return nil
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}
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