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perf

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This commit is contained in:
Lei Xue
2017-07-31 21:47:38 +08:00
parent 957564305a
commit 4ae643e9f8
12 changed files with 258 additions and 221 deletions
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83
pkg/scsi/sbc.go
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@@ -18,8 +18,6 @@ limitations under the License.
package scsi
import (
"bytes"
"encoding/binary"
"fmt"
"unsafe"
@@ -235,18 +233,11 @@ func SBCModeSense(host int, cmd *api.SCSICommand) api.SAMStat {
deviceSpecific |= 0x80
}
buf := cmd.InSDBBuffer.Buffer
data := []byte{0x00, 0x00, 0x00, 0x00}
if buf != nil {
data = buf.Bytes()
}
if cmd.SCB.Bytes()[0] == 0x1a {
data[2] = deviceSpecific
if cmd.SCB[0] == 0x1a {
cmd.InSDBBuffer.Buffer[2] = deviceSpecific
} else {
data[3] = deviceSpecific
cmd.InSDBBuffer.Buffer[3] = deviceSpecific
}
cmd.InSDBBuffer.Buffer = bytes.NewBuffer(data)
return api.SAMStatGood
}
@@ -284,15 +275,15 @@ func SBCFormatUnit(host int, cmd *api.SCSICommand) api.SAMStat {
goto sense
}
if cmd.SCB.Bytes()[1]&0x80 != 0 {
if cmd.SCB[1]&0x80 != 0 {
// we dont support format protection information
goto sense
}
if cmd.SCB.Bytes()[1]&0x10 != 0 {
if cmd.SCB[1]&0x10 != 0 {
// we dont support format data
goto sense
}
if cmd.SCB.Bytes()[1]&0x07 != 0 {
if cmd.SCB[1]&0x07 != 0 {
// defect list format must be 0
goto sense
}
@@ -330,7 +321,7 @@ func SBCReadWrite(host int, cmd *api.SCSICommand) api.SAMStat {
key = ILLEGAL_REQUEST
asc = ASC_INVALID_FIELD_IN_CDB
dev = cmd.Device
scb = cmd.SCB.Bytes()
scb = cmd.SCB
opcode = api.SCSICommandType(scb[0])
lba uint64
tl uint32
@@ -353,9 +344,6 @@ func SBCReadWrite(host int, cmd *api.SCSICommand) api.SAMStat {
log.Warnf("sense data(ILLEGAL_REQUEST,ASC_INVALID_FIELD_IN_CDB) encounter")
goto sense
}
if cmd.OutSDBBuffer.Buffer == nil {
cmd.OutSDBBuffer.Buffer = &bytes.Buffer{}
}
case api.WRITE_SAME, api.WRITE_SAME_16:
// We dont support resource-provisioning so ANCHOR bit == 1 is an error.
if scb[1]&0x10 != 0 {
@@ -482,10 +470,9 @@ func SBCRelease(host int, cmd *api.SCSICommand) api.SAMStat {
*/
func SBCReadCapacity(host int, cmd *api.SCSICommand) api.SAMStat {
var (
scb = cmd.SCB.Bytes()
scb = cmd.SCB
key = ILLEGAL_REQUEST
asc = ASC_LUN_NOT_SUPPORTED
data = &bytes.Buffer{}
bshift = cmd.Device.BlockShift
size = cmd.Device.Size >> bshift
)
@@ -501,24 +488,21 @@ func SBCReadCapacity(host int, cmd *api.SCSICommand) api.SAMStat {
goto sense
}
/*
if cmd.InSDBBuffer.Length < 8 {
goto overflow
}
*/
if cmd.InSDBBuffer.Length < 8 {
goto overflow
}
// data[0] = (size >> 32) ? __cpu_to_be32(0xffffffff) : __cpu_to_be32(size - 1);
if size>>32 != 0 {
binary.Write(data, binary.BigEndian, uint32(0xffffffff))
copy(cmd.InSDBBuffer.Buffer, util.MarshalUint32(uint32(0xffffffff)))
} else {
binary.Write(data, binary.BigEndian, uint32(size-1))
copy(cmd.InSDBBuffer.Buffer, util.MarshalUint32(uint32(size-1)))
}
// data[1] = __cpu_to_be32(1U << bshift);
binary.Write(data, binary.BigEndian, uint32(1<<bshift))
//overflow:
copy(cmd.InSDBBuffer.Buffer[4:], util.MarshalUint32(uint32(1<<bshift)))
overflow:
cmd.InSDBBuffer.Resid = 8
cmd.InSDBBuffer.Buffer = data
return api.SAMStatGood
sense:
cmd.InSDBBuffer.Resid = 0
@@ -537,7 +521,7 @@ func SBCVerify(host int, cmd *api.SCSICommand) api.SAMStat {
key = ILLEGAL_REQUEST
asc = ASC_INVALID_FIELD_IN_CDB
dev = cmd.Device
scb = cmd.SCB.Bytes()
scb = cmd.SCB
lba uint64
tl uint32
err error
@@ -548,14 +532,14 @@ func SBCVerify(host int, cmd *api.SCSICommand) api.SAMStat {
goto sense
}
if cmd.SCB.Bytes()[1]&0xe0 != 0 {
if scb[1]&0xe0 != 0 {
// We only support protection information type 0
key = ILLEGAL_REQUEST
asc = ASC_INVALID_FIELD_IN_CDB
goto sense
}
if cmd.SCB.Bytes()[1]&0x02 == 0 {
if scb[1]&0x02 == 0 {
// no data compare with the media
return api.SAMStatGood
}
@@ -587,7 +571,6 @@ func SBCVerify(host int, cmd *api.SCSICommand) api.SAMStat {
}
return api.SAMStatGood
sense:
cmd.InSDBBuffer.Resid = 0
BuildSenseData(cmd, key, asc)
return api.SAMStatCheckCondition
}
@@ -602,17 +585,19 @@ sense:
*/
func SBCReadCapacity16(host int, cmd *api.SCSICommand) api.SAMStat {
var (
data = &bytes.Buffer{}
bshift = cmd.Device.BlockShift
size = cmd.Device.Size >> bshift
bshift = cmd.Device.BlockShift
size = cmd.Device.Size >> bshift
allocationLength uint32
)
data.Write(util.MarshalUint64(uint64(size - 1)))
binary.Write(data, binary.BigEndian, uint32(1<<bshift))
val := (cmd.Device.Attrs.Lbppbe << 16) | cmd.Device.Attrs.LowestAlignedLBA
data.Write(util.MarshalUint32(uint32(val)))
binary.Write(data, binary.BigEndian, uint64(0))
binary.Write(data, binary.BigEndian, uint64(0))
cmd.InSDBBuffer.Buffer = data
allocationLength = util.GetUnalignedUint32(cmd.SCB[10:14])
copy(cmd.InSDBBuffer.Buffer, util.MarshalUint64(uint64(size-1)))
if allocationLength > 12 {
copy(cmd.InSDBBuffer.Buffer[8:], util.MarshalUint32(uint32(1<<bshift)))
if allocationLength > 16 {
val := (cmd.Device.Attrs.Lbppbe << 16) | cmd.Device.Attrs.LowestAlignedLBA
copy(cmd.InSDBBuffer.Buffer[12:], util.MarshalUint32(uint32(val)))
}
}
return api.SAMStatGood
}
@@ -621,7 +606,7 @@ func SBCGetLbaStatus(host int, cmd *api.SCSICommand) api.SAMStat {
key = ILLEGAL_REQUEST
asc = ASC_INVALID_FIELD_IN_CDB
dev = cmd.Device
scb = cmd.SCB.Bytes()
scb = cmd.SCB
lba uint64
tl uint32
)
@@ -631,14 +616,14 @@ func SBCGetLbaStatus(host int, cmd *api.SCSICommand) api.SAMStat {
goto sense
}
if cmd.SCB.Bytes()[1]&0xe0 != 0 {
if scb[1]&0xe0 != 0 {
// We only support protection information type 0
key = ILLEGAL_REQUEST
asc = ASC_INVALID_FIELD_IN_CDB
goto sense
}
if cmd.SCB.Bytes()[1]&0x02 == 0 {
if scb[1]&0x02 == 0 {
// no data compare with the media
return api.SAMStatGood
}
@@ -668,7 +653,7 @@ sense:
}
func SBCServiceAction(host int, cmd *api.SCSICommand) api.SAMStat {
opcode := api.SCSICommandType(cmd.SCB.Bytes()[1] & 0x1f)
opcode := api.SCSICommandType(cmd.SCB[1] & 0x1f)
switch opcode {
case api.READ_CAPACITY:
return SBCReadCapacity(host, cmd)