init commit for spc/sbc
This commit is contained in:
Lei Xue
208
pkg/scsi/sbc.go
208
pkg/scsi/sbc.go
@@ -17,6 +17,8 @@ limitations under the License.
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// SCSI block command processing
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package scsi
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import "encoding/binary"
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type SBCSCSIDeviceProtocol struct {
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BaseSCSIDeviceProtocol
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}
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@@ -37,10 +39,12 @@ func (sbc *SBCSCSIDeviceProtocol) OfflineLu(lu *SCSILu) error {
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return nil
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}
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func NewSBCDevice() (SBCSCSIDeviceProtocol, error) {
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func NewSBCDevice() SBCSCSIDeviceProtocol {
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var sbc = SBCSCSIDeviceProtocol{
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BaseSCSIDeviceProtocol{Type: TYPE_DISK,
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SCSIDeviceOps: make([]SCSIDeviceOperation, 256)},
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BaseSCSIDeviceProtocol{
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Type: TYPE_DISK,
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SCSIDeviceOps: make([]SCSIDeviceOperation, 256),
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},
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}
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for i := 0; i <= 256; i++ {
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sbc.SCSIDeviceOps = append(sbc.SCSIDeviceOps, NewSCSIDeviceOperation(SPCIllegalOp, nil, 0))
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@@ -95,57 +99,201 @@ func NewSBCDevice() (SBCSCSIDeviceProtocol, error) {
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sbc.SCSIDeviceOps[WRITE_VERIFY_12] = NewSCSIDeviceOperation(SBCReadWrite, nil, PR_EA_FA|PR_EA_FN)
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sbc.SCSIDeviceOps[VERIFY_12] = NewSCSIDeviceOperation(SBCVerify, nil, PR_EA_FA|PR_EA_FN)
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return sbc, nil
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return sbc
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}
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func SBCModeSelect(host int, cmd *SCSICommand) error {
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return nil
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func SBCModeSelect(host int, cmd *SCSICommand) SAMStat {
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return SAMStatGood
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}
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func SBCModeSense(host int, cmd *SCSICommand) error {
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return nil
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func SBCModeSense(host int, cmd *SCSICommand) SAMStat {
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// DPOFUA = 0x10
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var deviceSpecific uint8 = 0x10
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if err := SPCModeSense(host, cmd); err.Err != nil {
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return err
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}
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// If this is a read-only lun, we must set the write protect bit
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if cmd.Device.Attrs.Readonly || cmd.Device.Attrs.SWP {
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deviceSpecific |= 0x80
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}
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data := cmd.InSDBBuffer.Buffer
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data.Next(2)
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if cmd.SCB.Bytes()[0] == 0x1a {
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data.WriteByte(deviceSpecific)
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} else {
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data.Next(1)
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data.WriteByte(deviceSpecific)
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}
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return SAMStatGood
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}
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func SBCFormatUnit(host int, cmd *SCSICommand) error {
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return nil
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// The FORMAT UNIT command requests that the device server format the medium into application client
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// accessible logical blocks as specified in the number of blocks and block length values received
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// in the last mode parameter block descriptor in a MODE SELECT command (see SPC-3). In addition,
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// the device server may certify the medium and create control structures for the management of the medium and defects.
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// The degree that the medium is altered by this command is vendor-specific.
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func SBCFormatUnit(host int, cmd *SCSICommand) SAMStat {
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var (
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key = ILLEGAL_REQUEST
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asc = ASC_INVALID_FIELD_IN_CDB
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)
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if err := deviceReserve(cmd); err != nil {
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return SAMStatReservationConflict
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}
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if !cmd.Device.Attrs.Online {
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key = NOT_READY
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asc = ASC_MEDIUM_NOT_PRESENT
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goto sense
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}
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if cmd.Device.Attrs.Readonly || cmd.Device.Attrs.SWP {
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key = DATA_PROTECT
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asc = ASC_WRITE_PROTECT
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goto sense
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}
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if cmd.SCB.Bytes()[1]&0x80 != 0 {
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// we dont support format protection information
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goto sense
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}
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if cmd.SCB.Bytes()[1]&0x10 != 0 {
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// we dont support format data
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goto sense
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}
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if cmd.SCB.Bytes()[1]&0x07 != 0 {
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// defect list format must be 0
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goto sense
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}
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return SAMStatGood
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sense:
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BuildSenseData(cmd, key, asc)
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return SAMStatCheckCondition
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}
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func SBCUnmap(host int, cmd *SCSICommand) error {
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return nil
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func SBCUnmap(host int, cmd *SCSICommand) SAMStat {
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return SAMStatGood
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}
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func SBCReadWrite(host int, cmd *SCSICommand) error {
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return nil
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func SBCReadWrite(host int, cmd *SCSICommand) SAMStat {
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return SAMStatGood
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}
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func SBCReserve(host int, cmd *SCSICommand) error {
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return nil
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func SBCReserve(host int, cmd *SCSICommand) SAMStat {
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if err := deviceReserve(cmd); err != nil {
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return SAMStatReservationConflict
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}
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return SAMStatGood
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}
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func SBCRelease(host int, cmd *SCSICommand) error {
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return nil
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func SBCRelease(host int, cmd *SCSICommand) SAMStat {
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if err := deviceRelease(cmd.Target.TID, cmd.CommandITNID, cmd.Device.Lun, false); err != nil {
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return SAMStatReservationConflict
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}
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return SAMStatGood
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}
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func SBCReadCapacity(host int, cmd *SCSICommand) error {
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return nil
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// The READ CAPACITY (10) command requests that the device server transfer 8 bytes of parameter data
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// describing the capacity and medium format of the direct-access block device to the data-in buffer.
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// This command may be processed as if it has a HEAD OF QUEUE task attribute. If the logical unit supports
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// protection information, the application client should use the READ CAPACITY (16) command instead of
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// the READ CAPACITY (10) command.
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func SBCReadCapacity(host int, cmd *SCSICommand) SAMStat {
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var (
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scb = cmd.SCB.Bytes()
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key = ILLEGAL_REQUEST
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asc = ASC_LUN_NOT_SUPPORTED
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data = cmd.InSDBBuffer.Buffer
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bshift = cmd.Device.BlockShift
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size = cmd.Device.Size >> bshift
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)
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if cmd.Device.Attrs.Removable && !cmd.Device.Attrs.Online {
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key = NOT_READY
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asc = ASC_MEDIUM_NOT_PRESENT
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goto sense
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}
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if (scb[8]&0x1 == 0) && (scb[2]|scb[3]|scb[4]|scb[5]) != 0 {
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asc = ASC_INVALID_FIELD_IN_CDB
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goto sense
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}
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if cmd.InSDBBuffer.Length < 8 {
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goto overflow
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}
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// data[0] = (size >> 32) ? __cpu_to_be32(0xffffffff) : __cpu_to_be32(size - 1);
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if size>>32 != 0 {
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binary.Write(data, binary.BigEndian, uint32(0xffffffff))
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} else {
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binary.Write(data, binary.BigEndian, uint32(size-1))
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}
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// data[1] = __cpu_to_be32(1U << bshift);
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binary.Write(data, binary.BigEndian, uint32(1<<bshift))
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overflow:
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cmd.InSDBBuffer.Resid = 8
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return SAMStatGood
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sense:
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cmd.InSDBBuffer.Resid = 0
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BuildSenseData(cmd, key, asc)
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return SAMStatCheckCondition
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}
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func SBCVerify(host int, cmd *SCSICommand) error {
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return nil
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// The VERIFY (10) command requests that the device server verify the specified logical block(s) on the medium.
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func SBCVerify(host int, cmd *SCSICommand) SAMStat {
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var (
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key = ILLEGAL_REQUEST
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asc = ASC_INVALID_FIELD_IN_CDB
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)
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if cmd.Device.Attrs.Removable && !cmd.Device.Attrs.Online {
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key = NOT_READY
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asc = ASC_MEDIUM_NOT_PRESENT
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goto sense
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}
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if cmd.SCB.Bytes()[1]&0xe0 != 0 {
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// We only support protection information type 0
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key = ILLEGAL_REQUEST
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asc = ASC_INVALID_FIELD_IN_CDB
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goto sense
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}
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if cmd.SCB.Bytes()[1]&0x02 == 0 {
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// no data compare with the media
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return SAMStatGood
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}
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// TODO
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sense:
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cmd.InSDBBuffer.Resid = 0
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BuildSenseData(cmd, key, asc)
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return SAMStatCheckCondition
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}
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func SBCReadCapacity16(host int, cmd *SCSICommand) error {
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return nil
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func SBCReadCapacity16(host int, cmd *SCSICommand) SAMStat {
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return SAMStatGood
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}
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func SBCGetLbaStatus(host int, cmd *SCSICommand) error {
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return nil
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func SBCGetLbaStatus(host int, cmd *SCSICommand) SAMStat {
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return SAMStatGood
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}
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func SBCServiceAction(host int, cmd *SCSICommand) error {
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return nil
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func SBCServiceAction(host int, cmd *SCSICommand) SAMStat {
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return SAMStatGood
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}
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func SBCSyncCache(host int, cmd *SCSICommand) error {
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return nil
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// The SYNCHRONIZE CACHE (10) command requests that the device server ensure that
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// the specified logical blocks have their most recent data values recorded in
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// non-volatile cache and/or on the medium, based on the SYNC_NV bit.
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func SBCSyncCache(host int, cmd *SCSICommand) SAMStat {
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return SAMStatGood
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}
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