84 lines
2.2 KiB
Go
84 lines
2.2 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 "github.com/gostor/gotgt/pkg/api"
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type CommandFunc func(host int, cmd *api.SCSICommand) api.SAMStat
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type SCSIServiceAction struct {
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ServiceAction uint32
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CommandPerformFunc CommandFunc
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}
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type SCSIDeviceOperation struct {
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CommandPerformFunc CommandFunc
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ServiceAction *SCSIServiceAction
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PRConflictBits uint8
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}
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type BaseSCSIDeviceProtocol struct {
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Type api.SCSIDeviceType
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SCSIDeviceOps []SCSIDeviceOperation
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}
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type SCSIDeviceProtocol interface {
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InitLu(lu *api.SCSILu) error
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ExitLu(lu *api.SCSILu) error
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ConfigLu(lu *api.SCSILu) error
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OnlineLu(lu *api.SCSILu) error
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OfflineLu(lu *api.SCSILu) error
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}
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func NewSCSIDeviceOperation(fn CommandFunc, sa *SCSIServiceAction, pr uint8) SCSIDeviceOperation {
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return SCSIDeviceOperation{
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CommandPerformFunc: fn,
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ServiceAction: sa,
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PRConflictBits: pr,
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}
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}
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func BuildSenseData(cmd *api.SCSICommand, key byte, asc SCSISubError) {
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senseBuffer := cmd.SenseBuffer
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if cmd.Device.Attrs.SenseFormat {
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// descriptor format
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// current, not deferred
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senseBuffer.WriteByte(0x72)
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senseBuffer.WriteByte(key)
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senseBuffer.WriteByte((byte(asc) >> 8) & 0xff)
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senseBuffer.WriteByte(byte(asc) & 0xff)
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cmd.SenseLength = 8
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} else {
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// fixed format
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var length uint32 = 0xa
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// current, not deferred
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senseBuffer.WriteByte(0x70)
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senseBuffer.WriteByte(0x00)
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senseBuffer.WriteByte(key)
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for i := 0; i < 4; i++ {
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senseBuffer.WriteByte(0x00)
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}
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senseBuffer.WriteByte(byte(length))
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for i := 0; i < 4; i++ {
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senseBuffer.WriteByte(0x00)
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}
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senseBuffer.WriteByte((byte(asc) >> 8) & 0xff)
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senseBuffer.WriteByte(byte(asc) & 0xff)
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cmd.SenseLength = length + 8
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}
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}
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