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sgio_linux.go
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// Copyright 2019 Hewlett Packard Enterprise Development LP
package sgio
import (
"bytes"
"encoding/hex"
"fmt"
log "github.com/hpe-storage/common-host-libs/logger"
"os"
"syscall"
"unsafe"
)
const (
sgGetVersionNumber = 0x2282
sgIO = 0x2285
sgDxferFromDev = -3
senseBufLen = 64
timeout = 20000
respBufLen = 96
sgInfoOkMask = 0x1
sgInfoOk = 0x0
)
var errmap map[string]string
//GetErrString get the error string
func GetErrString(a, b byte) string {
return errmap[stringify(a, b)]
}
func init() {
errmap = make(map[string]string)
errmap[stringify(0x00, 0x00)] = "NO ADDITIONAL SENSE INFORMATION"
errmap[stringify(0x00, 0x01)] = "FILEMARK DETECTED"
errmap[stringify(0x00, 0x02)] = "END-OF-PARTITION/MEDIUM DETECTED"
errmap[stringify(0x00, 0x03)] = "SETMARK DETECTED"
errmap[stringify(0x00, 0x04)] = "BEGINNING-OF-PARTITION/MEDIUM DETECTED"
errmap[stringify(0x00, 0x05)] = "END-OF-DATA DETECTED"
errmap[stringify(0x00, 0x06)] = "I/O PROCESS TERMINATED"
errmap[stringify(0x00, 0x11)] = "AUDIO PLAY OPERATION IN PROGRESS"
errmap[stringify(0x00, 0x12)] = "AUDIO PLAY OPERATION PAUSED"
errmap[stringify(0x00, 0x13)] = "AUDIO PLAY OPERATION SUCCESSFULLY COMPLETED"
errmap[stringify(0x00, 0x14)] = "AUDIO PLAY OPERATION STOPPED DUE TO ERROR"
errmap[stringify(0x00, 0x15)] = "NO CURRENT AUDIO STATUS TO RETURN"
errmap[stringify(0x01, 0x00)] = "NO INDEX/SECTOR SIGNAL"
errmap[stringify(0x02, 0x00)] = "NO SEEK COMPLETE"
errmap[stringify(0x03, 0x00)] = "PERIPHERAL DEVICE WRITE FAULT"
errmap[stringify(0x03, 0x01)] = "NO WRITE CURRENT"
errmap[stringify(0x03, 0x02)] = "EXCESSIVE WRITE ERRORS"
errmap[stringify(0x04, 0x00)] = "LOGICAL UNIT NOT READY, CAUSE NOT REPORTABLE"
errmap[stringify(0x04, 0x01)] = "LOGICAL UNIT IS IN PROCESS OF BECOMING READY"
errmap[stringify(0x04, 0x02)] = "LOGICAL UNIT NOT READY, INITIALIZING COMMAND REQUIRED"
errmap[stringify(0x04, 0x03)] = "LOGICAL UNIT NOT READY, MANUAL INTERVENTION REQUIRED"
errmap[stringify(0x04, 0x04)] = "LOGICAL UNIT NOT READY, FORMAT IN PROGRESS"
errmap[stringify(0x05, 0x00)] = "LOGICAL UNIT DOES NOT RESPOND TO SELECTION"
errmap[stringify(0x06, 0x00)] = "REFERENCE POSITION FOUND"
errmap[stringify(0x07, 0x00)] = "MULTIPLE PERIPHERAL DEVICES SELECTED"
errmap[stringify(0x08, 0x00)] = "LOGICAL UNIT COMMUNICATION FAILURE"
errmap[stringify(0x08, 0x01)] = "LOGICAL UNIT COMMUNICATION TIME-OUT"
errmap[stringify(0x08, 0x02)] = "LOGICAL UNIT COMMUNICATION PARITY ERROR"
errmap[stringify(0x09, 0x00)] = "TRACK FOLLOWING ERROR"
errmap[stringify(0x09, 0x01)] = "TRA CKING SERVO FAILURE"
errmap[stringify(0x09, 0x02)] = "FOC US SERVO FAILURE"
errmap[stringify(0x09, 0x03)] = "SPI NDLE SERVO FAILURE"
errmap[stringify(0x0A, 0x00)] = "ERROR LOG OVERFLOW"
errmap[stringify(0x0B, 0x00)] = ""
errmap[stringify(0x0C, 0x00)] = "WRITE ERROR"
errmap[stringify(0x0C, 0x01)] = "WRITE ERROR RECOVERED WITH AUTO REALLOCATION"
errmap[stringify(0x0C, 0x02)] = "WRITE ERROR - AUTO REALLOCATION FAILED"
errmap[stringify(0x0D, 0x00)] = ""
errmap[stringify(0x0E, 0x00)] = ""
errmap[stringify(0x0F, 0x00)] = ""
errmap[stringify(0x10, 0x00)] = "ID CRC OR ECC ERROR"
errmap[stringify(0x11, 0x00)] = "UNRECOVERED READ ERROR"
errmap[stringify(0x11, 0x01)] = "READ RETRIES EXHAUSTED"
errmap[stringify(0x11, 0x02)] = "ERROR TOO LONG TO CORRECT"
errmap[stringify(0x11, 0x03)] = "MULTIPLE READ ERRORS"
errmap[stringify(0x11, 0x04)] = "UNRECOVERED READ ERROR - AUTO REALLOCATE FAILED"
errmap[stringify(0x11, 0x05)] = "L-EC UNCORRECTABLE ERROR"
errmap[stringify(0x11, 0x06)] = "CIRC UNRECOVERED ERROR"
errmap[stringify(0x11, 0x07)] = "DATA RESYCHRONIZATION ERROR"
errmap[stringify(0x11, 0x08)] = "INCOMPLETE BLOCK READ"
errmap[stringify(0x11, 0x09)] = "NO GAP FOUND"
errmap[stringify(0x11, 0x0A)] = "MISCORRECTED ERROR"
errmap[stringify(0x11, 0x0B)] = "UNRECOVERED READ ERROR - RECOMMEND REASSIGNMENT"
errmap[stringify(0x11, 0x0C)] = "UNRECOVERED READ ERROR - RECOMMEND REWRITE THE DATA"
errmap[stringify(0x12, 0x00)] = "ADDRESS MARK NOT FOUND FOR ID FIELD"
errmap[stringify(0x13, 0x00)] = "ADDRESS MARK NOT FOUND FOR DATA FIELD"
errmap[stringify(0x14, 0x00)] = "RECORDED ENTITY NOT FOUND"
errmap[stringify(0x14, 0x01)] = "RECORD NOT FOUND"
errmap[stringify(0x14, 0x02)] = "FILEMARK OR SETMARK NOT FOUND"
errmap[stringify(0x14, 0x03)] = "END-OF-DATA NOT FOUND"
errmap[stringify(0x14, 0x04)] = "BLOCK SEQUENCE ERROR"
errmap[stringify(0x15, 0x00)] = "RANDOM POSITIONING ERROR"
errmap[stringify(0x15, 0x01)] = "MECHANICAL POSITIONING ERROR"
errmap[stringify(0x15, 0x02)] = "POSITIONING ERROR DETECTED BY READ OF MEDIUM"
errmap[stringify(0x16, 0x00)] = "DATA SYNCHRONIZATION MARK ERROR"
errmap[stringify(0x17, 0x00)] = "RECOVERED DATA WITH NO ERROR CORRECTION APPLIED"
errmap[stringify(0x17, 0x01)] = "RECOVERED DATA WITH RETRIES"
errmap[stringify(0x17, 0x02)] = "RECOVERED DATA WITH POSITIVE HEAD OFFSET"
errmap[stringify(0x17, 0x03)] = "RECOVERED DATA WITH NEGATIVE HEAD OFFSET"
errmap[stringify(0x17, 0x04)] = "RECOVERED DATA WITH RETRIES AND/OR CIRC APPLIED"
errmap[stringify(0x17, 0x05)] = "RECOVERED DATA USING PREVIOUS SECTOR ID"
errmap[stringify(0x17, 0x06)] = "RECOVERED DATA WITHOUT ECC - DATA AUTO-REALLOCATED"
errmap[stringify(0x17, 0x07)] = "RECOVERED DATA WITHOUT ECC - RECOMMEND REASSIGNMENT"
errmap[stringify(0x17, 0x08)] = "RECOVERED DATA WITHOUT ECC - RECOMMEND REWRITE"
errmap[stringify(0x18, 0x00)] = "RECOVERED DATA WITH ERROR CORRECTION APPLIED"
errmap[stringify(0x18, 0x01)] = "RECOVERED DATA WITH ERROR CORRECTION & RETRIES APPLIED"
errmap[stringify(0x18, 0x02)] = "RECOVERED DATA - DATA AUTO-REALLOCATED"
errmap[stringify(0x18, 0x03)] = "RECOVERED DATA WITH CIRC"
errmap[stringify(0x18, 0x04)] = "RECOVERED DATA WITH LEC"
errmap[stringify(0x18, 0x05)] = "RECOVERED DATA - RECOMMEND REASSIGNMENT"
errmap[stringify(0x18, 0x06)] = "RECOVERED DATA - RECOMMEND REWRITE"
errmap[stringify(0x19, 0x00)] = "DEFECT LIST ERROR"
errmap[stringify(0x19, 0x01)] = "DEFECT LIST NOT AVAILABLE"
errmap[stringify(0x19, 0x02)] = "DEFECT LIST ERROR IN PRIMARY LIST"
errmap[stringify(0x19, 0x03)] = "DEFECT LIST ERROR IN GROWN LIST"
errmap[stringify(0x1A, 0x00)] = "PARAMETER LIST LENGTH ERROR"
errmap[stringify(0x1B, 0x00)] = "SYNCHRONOUS DATA TRANSFER ERROR"
errmap[stringify(0x1C, 0x00)] = "DEFECT LIST NOT FOUND"
errmap[stringify(0x1C, 0x01)] = "PRIMARY DEFECT LIST NOT FOUND"
errmap[stringify(0x1C, 0x02)] = "GROWN DEFECT LIST NOT FOUND"
errmap[stringify(0x1D, 0x00)] = "MISCOMPARE DURING VERIFY OPERATION"
errmap[stringify(0x1E, 0x00)] = "RECOVERED ID WITH ECC"
errmap[stringify(0x1F, 0x00)] = ""
errmap[stringify(0x20, 0x00)] = "INVALID COMMAND OPERATION CODE"
errmap[stringify(0x21, 0x00)] = "LOGICAL BLOCK ADDRESS OUT OF RANGE"
errmap[stringify(0x21, 0x01)] = "INVALID ELEMENT ADDRESS"
errmap[stringify(0x22, 0x00)] = "ILLEGAL FUNCTION (SHOULD USE 20 00, 24 00, OR 26 00)"
errmap[stringify(0x23, 0x00)] = ""
errmap[stringify(0x24, 0x00)] = "INVALID FIELD IN CDB"
errmap[stringify(0x25, 0x00)] = "LOGICAL UNIT NOT SUPPORTED"
errmap[stringify(0x26, 0x00)] = "INVALID FIELD IN PARAMETER LIST"
errmap[stringify(0x26, 0x01)] = "PARAMETER NOT SUPPORTED"
errmap[stringify(0x26, 0x02)] = "PARAMETER VALUE INVALID"
errmap[stringify(0x26, 0x03)] = "THRESHOLD PARAMETERS NOT SUPPORTED"
errmap[stringify(0x27, 0x00)] = "WRITE PROTECTED"
errmap[stringify(0x28, 0x00)] = "NOT READY TO READY TRANSITION(MEDIUM MAY HAVE CHANGED)"
errmap[stringify(0x28, 0x01)] = "IMPORT OR EXPORT ELEMENT ACCESSED"
errmap[stringify(0x29, 0x00)] = "POWER ON, RESET, OR BUS DEVICE RESET OCCURRED"
errmap[stringify(0x2A, 0x00)] = "PARAMETERS CHANGED"
errmap[stringify(0x2A, 0x01)] = "MODE PARAMETERS CHANGED"
errmap[stringify(0x2A, 0x02)] = "LOG PARAMETERS CHANGED"
errmap[stringify(0x2B, 0x00)] = "COPY CANNOT EXECUTE SINCE HOST CANNOT DISCONNECT"
errmap[stringify(0x2C, 0x00)] = "COMMAND SEQUENCE ERROR"
errmap[stringify(0x2C, 0x01)] = "TOO MANY WINDOWS SPECIFIED"
errmap[stringify(0x2C, 0x02)] = "INVALID COMBINATION OF WINDOWS SPECIFIED"
errmap[stringify(0x2D, 0x00)] = "OVERWRITE ERROR ON UPDATE IN PLACE"
errmap[stringify(0x2E, 0x00)] = ""
errmap[stringify(0x2F, 0x00)] = "COMMANDS CLEARED BY ANOTHER INITIATOR"
errmap[stringify(0x30, 0x00)] = "INCOMPATIBLE MEDIUM INSTALLED"
errmap[stringify(0x30, 0x01)] = "CANNOT READ MEDIUM - UNKNOWN FORMAT"
errmap[stringify(0x30, 0x02)] = "CANNOT READ MEDIUM - INCOMPATIBLE FORMAT"
errmap[stringify(0x30, 0x03)] = "CLEANING CARTRIDGE INSTALLED"
errmap[stringify(0x31, 0x00)] = "MEDIUM FORMAT CORRUPTED"
errmap[stringify(0x31, 0x01)] = "FORMAT COMMAND FAILED"
errmap[stringify(0x32, 0x00)] = "NO DEFECT SPARE LOCATION AVAILABLE"
errmap[stringify(0x32, 0x01)] = "DEFECT LIST UPDATE FAILURE"
errmap[stringify(0x33, 0x00)] = "TAPE LENGTH ERROR"
errmap[stringify(0x34, 0x00)] = ""
errmap[stringify(0x35, 0x00)] = ""
errmap[stringify(0x36, 0x00)] = "RIBBON, INK, OR TONER FAILURE"
errmap[stringify(0x37, 0x00)] = "ROUNDED PARAMETER"
errmap[stringify(0x38, 0x00)] = ""
errmap[stringify(0x39, 0x00)] = "SAVING PARAMETERS NOT SUPPORTED"
errmap[stringify(0x3A, 0x00)] = "MEDIUM NOT PRESENT"
errmap[stringify(0x3B, 0x00)] = "SEQUENTIAL POSITIONING ERROR"
errmap[stringify(0x3B, 0x01)] = "TAPE POSITION ERROR AT BEGINNING-OF-MEDIUM"
errmap[stringify(0x3B, 0x02)] = "TAPE POSITION ERROR AT END-OF-MEDIUM"
errmap[stringify(0x3B, 0x03)] = "TAPE OR ELECTRONIC VERTICAL FORMS UNIT NOT READY"
errmap[stringify(0x3B, 0x04)] = "SLEW FAILURE"
errmap[stringify(0x3B, 0x05)] = "PAPER JAM"
errmap[stringify(0x3B, 0x06)] = "FAILED TO SENSE TOP-OF-FORM"
errmap[stringify(0x3B, 0x07)] = "FAILED TO SENSE BOTTOM-OF-FORM"
errmap[stringify(0x3B, 0x08)] = "REPOSITION ERROR"
errmap[stringify(0x3B, 0x09)] = "READ PAST END OF MEDIUM"
errmap[stringify(0x3B, 0x0A)] = "READ PAST BEGINNING OF MEDIUM"
errmap[stringify(0x3B, 0x0B)] = "POSITION PAST END OF MEDIUM"
errmap[stringify(0x3B, 0x0C)] = "POSITION PAST BEGINNING OF MEDIUM"
errmap[stringify(0x3B, 0x0D)] = "MEDIUM DESTINATION ELEMENT FULL"
errmap[stringify(0x3B, 0x0E)] = "MEDIUM SOURCE ELEMENT EMPTY"
errmap[stringify(0x3C, 0x00)] = ""
errmap[stringify(0x3D, 0x00)] = "INVALID BITS IN IDENTIFY MESSAGE"
errmap[stringify(0x3E, 0x00)] = "LOGICAL UNIT HAS NOT SELF-CONFIGURED YET"
errmap[stringify(0x3F, 0x00)] = "TARGET OPERATING CONDITIONS HAVE CHANGED"
errmap[stringify(0x3F, 0x01)] = "MICROCODE HAS BEEN CHANGED"
errmap[stringify(0x3F, 0x02)] = "CHANGED OPERATING DEFINITION"
errmap[stringify(0x3F, 0x03)] = "INQUIRY DATA HAS CHANGED"
errmap[stringify(0x40, 0x00)] = "RAM FAILURE (SHOULD USE 40 NN)"
//errmap[stringify(0x40, 0xNN)] = "DIAGNOSTIC FAILURE ON COMPONENT NN (80H-FFH)"
errmap[stringify(0x41, 0x00)] = "DATA PATH FAILURE (SHOULD USE 40 NN)"
errmap[stringify(0x42, 0x00)] = "POWER-ON OR SELF-TEST FAILURE (SHOULD USE 40 NN)"
errmap[stringify(0x43, 0x00)] = "MESSAGE ERROR"
errmap[stringify(0x44, 0x00)] = "INTERNAL TARGET FAILURE"
errmap[stringify(0x45, 0x00)] = "SELECT OR RESELECT FAILURE"
errmap[stringify(0x46, 0x00)] = "UNSUCCESSFUL SOFT RESET"
errmap[stringify(0x47, 0x00)] = "SCSI PARITY ERROR"
errmap[stringify(0x48, 0x00)] = "INITIATOR DETECTED ERROR MESSAGE RECEIVED"
errmap[stringify(0x49, 0x00)] = "INVALID MESSAGE ERROR"
errmap[stringify(0x4A, 0x00)] = "COMMAND PHASE ERROR"
errmap[stringify(0x4B, 0x00)] = "DATA PHASE ERROR"
errmap[stringify(0x4C, 0x00)] = "LOGICAL UNIT FAILED SELF-CONFIGURATION"
errmap[stringify(0x4D, 0x00)] = ""
errmap[stringify(0x4E, 0x00)] = "OVERLAPPED COMMANDS ATTEMPTED"
errmap[stringify(0x4F, 0x00)] = ""
errmap[stringify(0x50, 0x00)] = "WRITE APPEND ERROR"
errmap[stringify(0x50, 0x01)] = "WRITE APPEND POSITION ERROR"
errmap[stringify(0x50, 0x02)] = "POSITION ERROR RELATED TO TIMING"
errmap[stringify(0x51, 0x00)] = "ERASE FAILURE"
errmap[stringify(0x52, 0x00)] = "CARTRIDGE FAULT"
errmap[stringify(0x53, 0x00)] = "MEDIA LOAD OR EJECT FAILED"
errmap[stringify(0x53, 0x01)] = "UNLOAD TAPE FAILURE"
errmap[stringify(0x53, 0x02)] = "MEDIUM REMOVAL PREVENTED"
errmap[stringify(0x54, 0x00)] = "SCSI TO HOST SYSTEM INTERFACE FAILURE"
errmap[stringify(0x55, 0x00)] = "SYSTEM RESOURCE FAILURE"
errmap[stringify(0x56, 0x00)] = ""
errmap[stringify(0x57, 0x00)] = "UNABLE TO RECOVER TABLE-OF-CONTENTS"
errmap[stringify(0x58, 0x00)] = "GENERATION DOES NOT EXIST"
errmap[stringify(0x59, 0x00)] = "UPDATED BLOCK READ"
errmap[stringify(0x5A, 0x00)] = "OPERATOR REQUEST OR STATE CHANGE INPUT (UNSPECIFIED)"
errmap[stringify(0x5A, 0x01)] = "OPERATOR MEDIUM REMOVAL REQUEST"
errmap[stringify(0x5A, 0x02)] = "OPERATOR SELECTED WRITE PROTECT"
errmap[stringify(0x5A, 0x03)] = "OPERATOR SELECTED WRITE PERMIT"
errmap[stringify(0x5B, 0x00)] = "LOG EXCEPTION"
errmap[stringify(0x5B, 0x01)] = "THRESHOLD CONDITION MET"
errmap[stringify(0x5B, 0x02)] = "LOG COUNTER AT MAXIMUM"
errmap[stringify(0x5B, 0x03)] = "LOG LIST CODES EXHAUSTED"
errmap[stringify(0x5C, 0x00)] = "RPL STATUS CHANGE"
errmap[stringify(0x5C, 0x01)] = "SPINDLES SYNCHRONIZED"
errmap[stringify(0x5C, 0x02)] = "SPINDLES NOT SYNCHRONIZED"
errmap[stringify(0x5D, 0x00)] = ""
errmap[stringify(0x5E, 0x00)] = ""
errmap[stringify(0x5F, 0x00)] = ""
errmap[stringify(0x60, 0x00)] = "LAMP FAILURE"
errmap[stringify(0x61, 0x00)] = "VIDEO ACQUISITION ERROR"
errmap[stringify(0x61, 0x01)] = "UNABLE TO ACQUIRE VIDEO"
errmap[stringify(0x61, 0x02)] = "OUT OF FOCUS"
errmap[stringify(0x62, 0x00)] = "SCAN HEAD POSITIONING ERROR"
errmap[stringify(0x63, 0x00)] = "END OF USER AREA ENCOUNTERED ON THIS TRACK"
errmap[stringify(0x64, 0x00)] = "ILLEGAL MODE FOR THIS TRACK"
}
var (
// StandardInquiry :
StandardInquiry = []uint8{
0x12, // Operation Code
0, // EVPD
0, // VPD Page
0, // Reserved
96, // Response length
0, // Control
}
// Vpd80Inquiry :
Vpd80Inquiry = []uint8{
0x12, // Operation Code
1, // EVPD
0x80, // VPD Page
0, // Reserved
96, // Response length
0, // Control
}
)
// Hdr is our version of sg_io_hdr_t that gets passed to the sg_io ioctl
type Hdr struct {
InterfaceID int32
DxferDirection int32
CmdLen uint8
MxSbLen uint8
IovecCount uint16
DxferLen uint32
Dxferp *byte
Cmdp *uint8
Sbp *byte
Timeout uint32
Flags uint32
PackID int32
pad0 [4]byte
UsrPtr *byte
Status uint8
MaskedStatus uint8
MsgStatus uint8
SbLenWr uint8
HostStatus uint16
DriverStatus uint16
Resid int32
Duration uint32
Info uint32
}
func sgioSyscall(f *os.File, i *Hdr) error {
return ioctl(f.Fd(), sgIO, uintptr(unsafe.Pointer(i)))
}
func ioctl(fd, cmd, ptr uintptr) error {
_, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, cmd, ptr)
if err != 0 {
return err
}
return nil
}
func openScsiDevice(fname string) (*os.File, error) {
f, err := os.OpenFile(fname, os.O_RDWR, 0)
if err != nil {
return nil, err
}
var version uint32
if (ioctl(f.Fd(), sgGetVersionNumber, uintptr(unsafe.Pointer(&version))) != nil) || (version < 30000) {
return nil, fmt.Errorf("device does not appear to be an sg device")
}
return f, nil
}
//ExecIoctl :
func ExecIoctl(inqCmdBlk []uint8, respBuf []byte, device string) error {
f, err := openScsiDevice(device)
defer f.Close()
if err != nil {
return err
}
senseBuf := make([]byte, senseBufLen)
ioHdr := &Hdr{
InterfaceID: int32('S'),
DxferDirection: sgDxferFromDev,
Timeout: timeout,
CmdLen: uint8(len(inqCmdBlk)),
MxSbLen: uint8(len(senseBuf)),
DxferLen: uint32(len(respBuf)),
Dxferp: &respBuf[0],
Cmdp: &inqCmdBlk[0],
Sbp: &senseBuf[0],
}
err = sgioSyscall(f, ioHdr)
if err != nil {
return err
}
return nil
}
//TestUnitReady to know if device is connected
func TestUnitReady(device string) error {
log.Tracef(">>>>>>>> TestUnitReady called for %s", device)
defer log.Trace("<<<<<<< TestUnitReady")
f, err := openScsiDevice(device)
if err != nil {
log.Errorf("unable to open the device %s : %s", device, err.Error())
return err
}
defer f.Close()
senseBuf := make([]byte, senseBufLen)
inqCmdBlk := []uint8{0, 0, 0, 0, 0, 0}
ioHdr := &Hdr{
InterfaceID: int32('S'),
CmdLen: uint8(len(inqCmdBlk)),
MxSbLen: senseBufLen,
DxferDirection: sgDxferFromDev,
Cmdp: &inqCmdBlk[0],
Sbp: &senseBuf[0],
Timeout: timeout,
}
err = sgioSyscall(f, ioHdr)
if err != nil {
log.Errorf("unable to execute sgio call on device %s : %s", device, err.Error())
return err
}
err = CheckSense(ioHdr, &senseBuf)
if err != nil {
log.Errorf("unable to execute CheckSense on device %s : %s", device, err.Error())
return err
}
return nil
}
// IsGroupScopedTarget :
func IsGroupScopedTarget(device string) bool {
log.Tracef("IsGroupScopedTarget called for %s", device)
respBuf := make([]byte, senseBufLen)
err := ExecIoctl(StandardInquiry, respBuf, device)
if err != nil {
log.Tracef("error(%s) to execute ioctl on device %s", err.Error(), device)
// return true if there is an error in order to incorrectly treat this as a VST target
return true
}
if (respBuf[46] & 1) == 1 {
log.Tracef("%s is group scoped", device)
return true
}
return false
}
// GetNOSVersion :
func GetNOSVersion(device string) (string, error) {
respBuf := make([]byte, senseBufLen)
err := ExecIoctl(StandardInquiry, respBuf, device)
if err != nil {
log.Tracef("error(%s) to execute ioctl on device %s", err.Error(), device)
return "", err
}
finalLen := senseBufLen
for i := 36; i < senseBufLen; i++ {
if respBuf[i] == 0 {
log.Trace("end of name at index ", i)
finalLen = i
break
}
}
return string(respBuf[36:finalLen]), nil
}
// GetDeviceSerial returns unit serial number of the device using vpd page 0x80
func GetDeviceSerial(device string) (string, error) {
log.Tracef(">>> GetDeviceSerial called for %s", device)
defer log.Tracef("<<< GetDeviceSerial")
respBuf := make([]byte, respBufLen)
err := ExecIoctl(Vpd80Inquiry, respBuf, device)
if err != nil {
log.Tracef("unable to obtain unit serial number on device %s, err %s", device, err.Error())
return "", err
}
return string(respBuf[4:36]), nil
}
// CheckSense : checks the sense error code
func CheckSense(i *Hdr, s *[]byte) error {
var b bytes.Buffer
if (i.Info & sgInfoOkMask) != sgInfoOk {
_, err := b.WriteString(
fmt.Sprintf("SCSI response not ok\n"+
"SCSI status: %v host status: %v driver status: %v",
i.Status, i.HostStatus, i.DriverStatus))
if err != nil {
return err
}
if i.SbLenWr > 0 {
_, err := b.WriteString(
fmt.Sprintf("\nSENSE:\n%v\n%v",
dumpHex(*s), GetErrString((*s)[12], (*s)[13])))
if err != nil {
return err
}
}
return fmt.Errorf(b.String())
}
return nil
}
func stringify(a, b byte) string {
return dumpHex(append([]byte{a}, b))
}
func dumpHex(data []byte) string {
var buf bytes.Buffer
var tmp [3]byte
for i := range data {
hex.Encode(tmp[:], data[i:i+1])
tmp[2] = ' '
_, err := buf.Write(tmp[:3])
if err != nil {
return ""
}
}
return buf.String()
}