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driverinfo=$driver if test -r $hostdir/status; then

num=$(printf '%d\n' `sed -n 's/SCSI host number://p' $hostdir/status`)driverinfo="$driver:$name"

fi hosts="$hosts $num" echo "Host adapter $num ($driverinfo) found." done done}

# Get /proc/scsi/scsi info for device $host:$channel:$id:$lun# Optional parameter: Number of lines after first (default = 2),# result in SCSISTR, return code 1 means empty.procscsiscsi (){if test -z "$1"; then LN=2; else LN=$1; fi

CHANNEL=`printf "%02i" $channel` ID=`printf "%02i" $id` LUN=`printf "%02i" $lun` if [ -d /sys/class/scsi_device ]; then SCSIPATH="/sys/class/scsi_device/${host}:${channel}:${id}:${lun}" if [ -d "$SCSIPATH" ] ; then

SCSISTR="Host: scsi${host} Channel: $CHANNEL Id: $ID Lun: $LUN"

if [ "$LN" -gt 0 ] ; then IVEND=$(cat ${SCSIPATH}/device/vendor) IPROD=$(cat ${SCSIPATH}/device/model) IPREV=$(cat ${SCSIPATH}/device/rev) SCSIDEV=$(printf ' Vendor: %-08s Model: %-16s Rev: %-4s' "$IVEND"

"$IPROD" "$IPREV") SCSISTR="$SCSISTR

$SCSIDEV" fi if [ "$LN" -gt 1 ] ; then ILVL=$(cat ${SCSIPATH}/device/scsi_level) type=$(cat ${SCSIPATH}/device/type) case "$type" in

0) ITYPE="Direct-Access " ;; 1) ITYPE="Sequential-Access" ;; 2) ITYPE="Printer " ;; 3) ITYPE="Processor " ;; 4) ITYPE="WORM " ;; 5) ITYPE="CD-ROM " ;; 6) ITYPE="Scanner " ;; 7) ITYPE="Optical Device " ;; 8) ITYPE="Medium Changer " ;; 9) ITYPE="Communications " ;; 10) ITYPE="Unknown " ;; 11) ITYPE="Unknown " ;; 12) ITYPE="RAID " ;;

13) ITYPE="Enclosure " ;; 14) ITYPE="Direct-Access-RBC" ;; *) ITYPE="Unknown " ;;

esac SCSITMP=$(printf ' Type: %-16s ANSI SCSI revisio

n: %02d' "$ITYPE" "$((ILVL - 1))") SCSISTR="$SCSISTR

$SCSITMP" fi

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else return 1

fi else grepstr="scsi$host Channel: $CHANNEL Id: $ID Lun: $LUN" SCSISTR=`cat /proc/scsi/scsi | grep -A$LN -e"$grepstr"` fi if test -z "$SCSISTR"; then return 1; else return 0; fi}

# Find sg device with 2.6 sysfs supportsgdevice26 (){ if test -e /sys/class/scsi_device/$host\:$channel\:$id\:$lun/device/generic; then SGDEV=`readlink /sys/class/scsi_device/$host\:$channel\:$id\:$lun/device/generic` SGDEV=`basename $SGDEV` else for SGDEV in /sys/class/scsi_generic/sg*; do DEV=`readlink $SGDEV/device` if test "${DEV##*/}" = "$host:$channel:$id:$lun"; then

SGDEV=`basename $SGDEV`; return fi

done SGDEV="" fi}

# Find sg device with 2.4 report-devs extensionssgdevice24 (){ if procscsiscsi 3; then SGDEV=`echo "$SCSISTR" | grep 'Attached drivers:' | sed 's/^ *Attached drivers: \(sg[0-9]*\).*/\1/'` fi}

# Find sg device that belongs to SCSI device $host $channel $id $lunsgdevice (){ SGDEV= if test -d /sys/class/scsi_device; then sgdevice26 else

DRV=`grep 'Attached drivers:' /proc/scsi/scsi 2>/dev/null` repdevstat=$((1-$?)) if [ $repdevstat = 0 ]; then echo "scsi report-devs 1" >/proc/scsi/scsi DRV=`grep 'Attached drivers:' /proc/scsi/scsi 2>/dev/null`

if [ $? = 1 ]; then return; fi fi if ! `echo $DRV | grep 'drivers: sg' >/dev/null`; then modprobe sg fi sgdevice24 if [ $repdevstat = 0 ]; then echo "scsi report-devs 0" >/proc/scsi/scsi fi fi

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}

# Test if SCSI device is still responding to commandstestonline (){ : testonline if test ! -x /usr/bin/sg_turs; then return 0; fi sgdevice if test -z "$SGDEV"; then return 0; fi sg_turs /dev/$SGDEV >/dev/null 2>&1 RC=$? # echo -e "\e[A\e[A\e[A${yellow}Test existence of $SGDEV = $RC ${norm} \n\n\n" if test $RC = 1; then return $RC; fi # OK, device online, compare INQUIRY string INQ=`sg_inq $sg_len_arg /dev/$SGDEV` IVEND=`echo "$INQ" | grep 'Vendor identification:' | sed 's/^[^:]*: \(.*\)$/\1/'` IPROD=`echo "$INQ" | grep 'Product identification:' | sed 's/^[^:]*: \(.*\)$/\1/'` IPREV=`echo "$INQ" | grep 'Product revision level:' | sed 's/^[^:]*: \(.*\)$/\1/'` STR=`printf " Vendor: %-08s Model: %-16s Rev: %-4s" "$IVEND" "$IPROD" "$IPREV"` IPTYPE=`echo "$INQ" | sed -n 's/.* Device_type=\([0-9]*\) .*/\1/p'`

IPQUAL=`echo "$INQ" | sed -n 's/ *PQual=\([0-9]*\) Device.*/\1/p'` if [ "$IPQUAL" != 0 ] ; then echo -e "\e[A\e[A\e[A\e[A${red}$SGDEV changed: ${bold}\nLU not available (PQual $IPQUAL)${norm}\n\n\n" return 1 fi

procscsiscsi TMPSTR=`echo "$SCSISTR" | grep 'Vendor:'` if [ "$TMPSTR" != "$STR" ]; then echo -e "\e[A\e[A\e[A\e[A${red}$SGDEV changed: ${bold}\nfrom:${TMPSTR#* } \nto: $STR ${norm}\n\n\n" return 1

fi TMPSTR=`echo "$SCSISTR" | sed -n 's/.*Type: *\(.*\) *ANSI.*/\1/p'` if [ $TMPSTR != $TYPE ] ; then echo -e "\e[A\e[A\e[A\e[A${red}$SGDEV changed: ${bold}\nfrom:${TMPSTR} \nto: $TYPE ${norm}\n\n\n" return 1 fireturn $RC

}

# Test if SCSI device $host $channen $id $lun exists# Outputs description from /proc/scsi/scsi, returns SCSISTRtestexist ()

{ : testexist SCSISTR= if procscsiscsi; then echo "$SCSISTR" | head -n1 echo "$SCSISTR" | tail -n2 | pr -o4 -l1 fi}

# Returns the list of existing channels per host

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chanlist (){ local hcil local cil local chan local tmpchan

for dev in /sys/class/scsi_device/${host}:* ; do hcil=${dev##*/} cil=${hcil#*:} chan=${cil%%:*} for tmpchan in $channelsearch ; do if test "$chan" -eq $tmpchan ; then

chan= fi done if test -n "$chan" ; then channelsearch="$channelsearch $chan" fi done}

# Returns the list of existing targets per hostidlist ()

{ local hcil local cil local il local target local tmpid

for dev in /sys/class/scsi_device/${host}:${channel}:* ; do hcil=${dev##*/} cil=${hcil#*:} il=${cil#*:} target=${il%%:*} for tmpid in $idsearch ; do

if test "$target" -eq $tmpid ; thentarget= fi done if test -n "$target" ; then idsearch="$idsearch $target" fi done}

# Returns the list of existing LUNsgetluns (){

if test ! -x /usr/bin/sg_luns; then return; fi sgdevice if test -z "$SGDEV"; then return; fi sg_luns -d /dev/$SGDEV | sed -n 's/.*lun=\(.*\)/\1/p'}

# Perform scan on a single lundolunscan(){ SCSISTR=

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devnr="$host $channel $id $lun" echo "Scanning for device $devnr ..." printf "${yellow}OLD: $norm" testexist : f $remove s $SCSISTR if test "$remove" -a "$SCSISTR"; then # Device exists: Test whether it's still online # (testonline returns 1 if it's gone or has changed) testonline if test $? = 1 -o ! -z "$forceremove"; then echo -en "\r\e[A\e[A\e[A${red}REM: " echo "$SCSISTR" | head -n1 echo -e "${norm}\e[B\e[B" if test -e /sys/class/scsi_device/${host}:${channel}:${id}:${lun}/device;then echo 1 > /sys/class/scsi_device/${host}:${channel}:${id}:${lun}/device/delete # Try reading, should fail if device is gone echo "$channel $id $lun" > /sys/class/scsi_host/host${host}/scan else echo "scsi remove-single-device $devnr" > /proc/scsi/scsi # Try reading, should fail if device is gone echo "scsi add-single-device $devnr" > /proc/scsi/scsi fi

fi if test $RC = 0 ; then if test -e /sys/class/scsi_device/${host}:${channel}:${id}:${lun}/device;then echo 1 > /sys/class/scsi_device/${host}:${channel}:${id}:${lun}/device/rescan fi fi

printf "\r\x1b[A\x1b[A\x1b[A${yellow}OLD: $norm" testexist if test -z "$SCSISTR"; then printf "\r${red}DEL: $norm\r\n\n"

let rmvd+=1; fi fi if test -z "$SCSISTR"; then # Device does not exist, try to add printf "\r${green}NEW: $norm" if test -e /sys/class/scsi_host/host${host}/scan; then echo "$channel $id $lun" > /sys/class/scsi_host/host${host}/scan 2> /dev/null else echo "scsi add-single-device $devnr" > /proc/scsi/scsi fi testexist

if test -z "$SCSISTR"; then # Device not present printf "\r\x1b[A"; # Optimization: if lun==0, stop here (only if in non-remove mode) if test $lun = 0 -a -z "$remove" -a $optscan = 1; then

break; fi else

let found+=1;fi

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fi}

# Perform report lun scandoreportlun(){ lun=0 SCSISTR= devnr="$host $channel $id $lun" echo "Scanning for device $devnr ..." printf "${yellow}OLD: $norm" testexist if test -z "$SCSISTR"; then # Device does not exist, try to add printf "\r${green}NEW: $norm" if test -e /sys/class/scsi_host/host${host}/scan; then echo "$channel $id $lun" > /sys/class/scsi_host/host${host}/scan 2> /dev/null else echo "scsi add-single-device $devnr" > /proc/scsi/scsi fi testexist if test -z "$SCSISTR"; then # Device not present

printf "\r\x1b[A"; lunsearch= return fi fi lunsearch=`getluns` lunremove= # Check existing luns for dev in /sys/class/scsi_device/$host\:$channel\:$id\:*; do lun=${dev##*:} newsearch= oldsearch="$lunsearch" for tmplun in $lunsearch; do

if test $tmplun -eq $lun ; then# Optimization: don't scan lun 0 againif [ $lun -ne 0 ]; then dolunscanfi

elsenewsearch="$newsearch $tmplun"

fi done if [ "${#oldsearch}" = "${#newsearch}" ] ; then

# Stale lunlunremove="$lunremove $lun"

fi

lunsearch="$newsearch" done # Add new ones and check stale ones for lun in $lunsearch $lunremove; do dolunscan done}# Perform search (scan $host)dosearch ()

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{ if test -z "$channelsearch" ; then chanlist fi for channel in $channelsearch; do if test -z "$idsearch" ; then idlist fi for id in $idsearch; do if test -z "$lunsearch"; then

doreportlun else

for lun in $lunsearch; do dolunscan done fi done done}# mainif test @$1 = @--help -o @$1 = @-h -o @$1 = @-?; then echo "Usage: rescan-scsi-bus.sh [options] [host [host ...]]" echo "Options:"

echo " -l activates scanning for LUNs 0-7 [default: 0]" echo " -L NUM activates scanning for LUNs 0--NUM [default: 0]" echo " -w scan for target device IDs 0 .. 15 [default: 0-7]" echo " -c enables scanning of channels 0 1 [default: 0]" echo " -r enables removing of devices [default: disabled]" echo " -i issue a FibreChannel LIP reset [default: disabled]" echo "--remove: same as -r" echo "--issue-lip: same as -i" echo "--forceremove: Remove and readd every device (DANGEROUS)" echo "--nooptscan: don't stop looking for LUNs is 0 is not found" echo "--color: use coloured prefixes OLD/NEW/DEL" echo "--hosts=LIST: Scan only host(s) in LIST" echo "--channels=LIST: Scan only channel(s) in LIST"

echo "--ids=LIST: Scan only target ID(s) in LIST" echo "--luns=LIST: Scan only lun(s) in LIST"echo " Host numbers may thus be specified either directly on cmd line (depre

cated) or" echo " or with the --hosts=LIST parameter (recommended)." echo "LIST: A[-B][,C[-D]]... is a comma separated list of single values andranges" echo " (No spaces allowed.)" exit 0fi

expandlist (){

list=$1 result="" first=${list%%,*} rest=${list#*,} while test ! -z "$first"; do

beg=${first%%-*};if test "$beg" = "$first"; then result="$result $beg";

else end=${first#*-}

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result="$result `seq $beg $end`"fitest "$rest" = "$first" && rest=""first=${rest%%,*}rest=${rest#*,}

done echo $result}

if test ! -d /sys/class/scsi_host/ -a ! -d /proc/scsi/; then echo "Error: SCSI subsystem not active" exit 1fi

# Make sure sg is theremodprobe sg >/dev/null 2>&1

sg_version=$(sg_inq -V 2>&1 | cut -d " " -f 3)sg_version=${sg_version##0.}if [ "$sg_version" -lt 70 ] ; then sg_len_arg="-36"else sg_len_arg="--len=36"fi

# defaultsunsetcolorlunsearch=""idsearch=`seq 0 7`channelsearch="0"remove=forceremove=optscan=1if test -d /sys/class/scsi_host; thenfindhosts_26

elsefindhosts

fi

# Scan optionsopt="$1"while test ! -z "$opt" -a -z "${opt##-*}"; do opt=${opt#-} case "$opt" in l) lunsearch=`seq 0 7` ;; L) lunsearch=`seq 0 $2`; shift ;; w) idsearch=`seq 0 15` ;; c) channelsearch="0 1" ;; r) remove=1 ;; i) lipreset=1 ;;

-remove) remove=1 ;; -forceremove) remove=1; forceremove=1 ;; -hosts=*) arg=${opt#-hosts=}; hosts=`expandlist $arg` ;; -channels=*) arg=${opt#-channels=};channelsearch=`expandlist $arg` ;;

-ids=*) arg=${opt#-ids=}; idsearch=`expandlist $arg` ;;-luns=*) arg=${opt#-luns=}; lunsearch=`expandlist $arg` ;;-color) setcolor ;;

-nooptscan) optscan=0 ;; -issue-lip) lipreset=1 ;; *) echo "Unknown option -$opt !" ;;

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esac shift opt="$1"done

# Hosts given ?if test "@$1" != "@"; thenhosts=$*;

fi

echo "Scanning SCSI subsystem for new devices"test -z "$remove" || echo " and remove devices that have disappeared"declare -i found=0declare -i rmvd=0for host in $hosts; do echo -n "Scanning host $host " if test -e /sys/class/fc_host/host$host ; then # It's pointless to do a target scan on FC if test -n "$lipreset" ; then echo 1 > /sys/class/fc_host/host$host/issue_lip 2> /dev/null; echo "- - -" > /sys/class/scsi_host/host$host/scan 2> /dev/null; fi channelsearch="" idsearch=""

fi [ -n "$channelsearch" ] && echo -n "channels $channelsearch " echo -n "for " if [ -n "$idsearch" ] ; then echo -n " SCSI target IDs " $idsearch else echo -n " all SCSI target IDs" fi if [ -n "$lunsearch" ] ; then echo ", LUNs " $lunsearch else echo ", all LUNs" fi

dosearch;doneecho "$found new device(s) found. "echo "$rmvd device(s) removed. "