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File rescan-scsi-bus.sh of Package scsi
#!/bin/bash # Skript to rescan SCSI bus, using the # scsi add-single-device mechanism # (w) 1998-03-19 Kurt Garloff <kurt@garloff.de> (c) GNU GPL # (w) 2003-07-16 Kurt Garloff <garloff@suse.de> (c) GNU GPL # $Id: rescan-scsi-bus.sh,v 1.24 2006/07/29 12:34:11 garloff Exp $ setcolor () { red="\e[0;31m" green="\e[0;32m" yellow="\e[0;33m" bold="\e[0;1m" norm="\e[0;0m" } unsetcolor () { red=""; green="" yellow=""; norm="" } # Return hosts. sysfs must be mounted findhosts_26 () { hosts= if ! ls /sys/class/scsi_host/host* >/dev/null 2>&1; then echo "No SCSI host adapters found in sysfs" exit 1; fi for hostdir in /sys/class/scsi_host/host*; do hostno=${hostdir#/sys/class/scsi_host/host} if [ -f $hostdir/isp_name ] ; then hostname="qla2xxx" elif [ -f $hostdir/lpfc_drvr_version ] ; then hostname="lpfc" else hostname=`cat $hostdir/proc_name` fi hosts="$hosts $hostno" echo "Host adapter $hostno ($hostname) found." done } # Return hosts. /proc/scsi/HOSTADAPTER/? must exist findhosts () { hosts= for driverdir in /proc/scsi/*; do driver=${driverdir#/proc/scsi/} if test $driver = scsi -o $driver = sg -o $driver = dummy -o $driver = device_info; then continue; fi for hostdir in $driverdir/*; do name=${hostdir#/proc/scsi/*/} if test $name = add_map -o $name = map -o $name = mod_parm; then continue; fi num=$name 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 } printtype () { local type=$1 case "$type" in 0) echo "Direct-Access " ;; 1) echo "Sequential-Access" ;; 2) echo "Printer " ;; 3) echo "Processor " ;; 4) echo "WORM " ;; 5) echo "CD-ROM " ;; 6) echo "Scanner " ;; 7) echo "Optical Device " ;; 8) echo "Medium Changer " ;; 9) echo "Communications " ;; 10) echo "Unknown " ;; 11) echo "Unknown " ;; 12) echo "RAID " ;; 13) echo "Enclosure " ;; 14) echo "Direct-Access-RBC" ;; *) echo "Unknown " ;; esac } # 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 ${SCSIPATH}/device/type) ITYPE=$(printtype $type) SCSITMP=$(printf ' Type: %-16s ANSI SCSI revision: %02d' "$ITYPE" "$((ILVL - 1))") SCSISTR="$SCSISTR $SCSITMP" fi else return 1 fi else grepstr="scsi$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 support sgdevice26 () { 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 $SGDEV`; return fi done SGDEV="" fi } # Find sg device with 2.4 report-devs extensions sgdevice24 () { if procscsiscsi 3; then SGDEV=`echo "$SCSISTR" | grep 'Attached drivers:' | sed 's/^ *Attached drivers: \(sg[0-9]*\).*/\1/'` fi } # Find sg device that belongs to SCSI device $host $channel $id $lun sgdevice () { SGDEV= if test -d /sys/class/scsi_device; then sgdevice26 else DRV=`grep 'Attached drivers:' /proc/scsi/scsi 2>/dev/null` repdevstat=$((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 [ $repdevstat = 0 ]; then echo "scsi report-devs 0" >/proc/scsi/scsi fi fi } # Test if SCSI device is still responding to commands testonline () { : testonline if test ! -x /usr/bin/sg_turs; then return 0; fi sgdevice if test -z "$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 $RC; fi # OK, device online, compare INQUIRY string INQ=`sg_inq -36 /dev/$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 TYPE=$(printtype $IPTYPE) procscsiscsi TMPSTR=`echo "$SCSISTR" | grep 'Vendor:'` if [ "$TMPSTR" != "$STR" ]; then echo -e "\e[A\e[A\e[A\e[A${red}$SGDEV changed: ${bold}\nfrom:${SCSISTR#* } \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 fi return $RC } # Test if SCSI device $host $channen $id $lun exists # Outputs description from /proc/scsi/scsi, returns SCSISTR testexist () { : testexist SCSISTR= if procscsiscsi; then echo "$SCSISTR" | head -n1 echo "$SCSISTR" | tail -n2 | pr -o4 -l1 fi } # Returns the list of existing channels per host chanlist () { local hcil local cil local chan local tmpchan for dev in /sys/class/scsi_device/${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 $chan" fi done } # Returns the list of existing targets per host idlist () { local hcil local cil local il local target local tmpid for dev in /sys/class/scsi_device/${host}:${channel}:* ; do hcil=${dev##*/} cil=${hcil#*:} il=${cil#*:} target=${il%%:*} for tmpid in $idsearch ; do if test "$target" -eq $tmpid ; then target= fi done if test -n "$target" ; then idsearch="$idsearch $target" fi done } # Returns the list of existing LUNs getluns () { if test ! -x /usr/bin/sg_luns; then return ""; fi sgdevice if test -z "$SGDEV"; then return ""; fi sg_luns -d /dev/$SGDEV | sed -n 's/.*lun=\(.*\)/\1/p' } # Perform scan on a single lun dolunscan() { SCSISTR= 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}:${lun}/device/delete # Try readding, should fail if device is gone echo "$channel $id $lun" > /sys/class/scsi_host/host${host}/scan else echo "scsi remove-single-device $devnr" > /proc/scsi/scsi # Try readding, should fail if device is gone echo "scsi add-single-device $devnr" > /proc/scsi/scsi fi fi printf "\r\x1b[A\x1b[A\x1b[A${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 $optscan = 1; then break; fi else let found+=1; fi fi } # Perform report lun scan doreportlun() { lun=0 SCSISTR= devnr="$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 again if [ $lun -ne 0 ]; then dolunscan fi else newsearch="$newsearch $tmplun" fi done if [ "${#oldsearch}" = "${#newsearch}" ] ; then # Stale lun lunremove="$lunremove $lun" fi lunsearch="$newsearch" done # Add new ones and check stale ones for lun in $lunsearch $lunremove; do dolunscan done } # Perform search (scan $host) dosearch () { if test -z "$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 } # main if 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 (deprecated) or" echo " or with the --hosts=LIST parameter (recommended)." echo "LIST: A[-B][,C[-D]]... is a comma separated list of single values and ranges" echo " (No spaces allowed.)" exit 0 fi 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#*-} result="$result `seq $beg $end`" fi test "$rest" = "$first" && rest="" first=${rest%%,*} rest=${rest#*,} done echo $result } if test ! -d /proc/scsi/; then echo "Error: SCSI subsystem not active" exit 1 fi # Make sure sg is there modprobe sg >/dev/null 2>&1 # defaults unsetcolor lunsearch="" idsearch=`seq 0 7` channelsearch="0" remove= forceremove= optscan=1 if test -d /sys/class/scsi_host; then findhosts_26 else findhosts fi # Scan options opt="$1" while test ! -z "$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 !" ;; esac shift opt="$1" done # Hosts given ? if test "@$1" != "@"; then hosts=$*; fi echo "Scanning SCSI subsystem for new devices" test -z "$remove" || echo " and remove devices that have disappeared" declare -i found=0 declare -i rmvd=0 for 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 " $lunsearch else echo ", all LUNs" fi dosearch; done echo "$found new device(s) found. " echo "$rmvd device(s) removed. "
