/
rescan-scsi-bus.sh
executable file
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rescan-scsi-bus.sh
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#!/bin/bash
# Script to rescan SCSI bus, using the scsi add-single-device mechanism.
# (c) 1998--2010 Kurt Garloff <kurt@garloff.de>, GNU GPL v2 or v3
# (c) 2006--2015 Hannes Reinecke, GNU GPL v2 or later
# $Id: rescan-scsi-bus.sh,v 1.57 2012/03/31 14:08:48 garloff Exp $
VERSION="20160511"
SCAN_WILD_CARD=4294967295
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=""
}
echo_debug()
{
if [ $debug -eq 1 ] ; then
echo "$1"
fi
}
# Output some text and return cursor to previous position
# (only works for simple strings)
# Stores length of string in LN and returns it
print_and_scroll_back ()
{
STRG="$1"
LN=${#STRG}
BK=""
declare -i cntr=0
while test $cntr -lt $LN; do BK="$BK\e[D"; let cntr+=1; done
echo -en "$STRG$BK"
return $LN
}
# Overwrite a text of length $LN with whitespace
white_out ()
{
BK=""; WH=""
declare -i cntr=0
while test $cntr -lt $LN; do BK="$BK\e[D"; WH="$WH "; let cntr+=1; done
echo -en "$WH$BK"
}
# Return hosts. sysfs must be mounted
findhosts_26 ()
{
hosts=`find /sys/class/scsi_host/host* -maxdepth 4 -type d -o -type l 2> /dev/null | awk -F'/' '{print $5}' | sed -e 's~host~~' | sort -nu`
scsi_host_data=`echo "$hosts" | sed -e 's~^~/sys/class/scsi_host/host~'`
for hostdir in $scsi_host_data; do
hostno=${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_debug "Host adapter $hostno ($hostname) found."
done
if [ -z "$hosts" ] ; then
echo "No SCSI host adapters found in sysfs"
exit 1;
fi
# Not necessary just use double quotes around variable to preserve new lines
#hosts=`echo $hosts | tr ' ' '\n'`
}
# Return hosts. /proc/scsi/HOSTADAPTER/? must exist
findhosts ()
{
hosts=
for driverdir in /proc/scsi/*; do
driver=${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
}
print02i()
{
if [ "$1" = "*" ] ; then
echo "00"
else
printf "%02i" "$1"
fi
}
# 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=$1; fi
CHANNEL=`print02i "$channel"`
ID=`print02i "$id"`
LUN=`print02i "$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: %-17s ANSI SCSI revision: %02d' "$ITYPE" "$((ILVL - 1))")
SCSISTR="$SCSISTR
$SCSITMP"
fi
else
return 1
fi
else
grepstr="scsi$host Channel: $CHANNEL Id: $ID Lun: $LUN"
SCSISTR=$(grep -A "$LN" -e "$grepstr" /proc/scsi/scsi)
fi
if test -z "$SCSISTR"; then return 1; else return 0; fi
}
# Find sg device with 2.6 sysfs support
sgdevice26 ()
{
local gendev
gendev=/sys/class/scsi_device/${host}:${channel}:${id}:${lun}/device/generic
if test -e "$gendev"; then
SGDEV=$(basename "$(readlink "$gendev")")
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 $lun
# and return in SGDEV
sgdevice ()
{
SGDEV=
if test -d /sys/class/scsi_device; then
sgdevice26
else
DRV=`grep 'Attached drivers:' /proc/scsi/scsi 2>/dev/null`
repdevstat=$((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 -q 'drivers: sg'; then
modprobe sg
fi
sgdevice24
if [ $repdevstat = 0 ]; then
echo "scsi report-devs 0" >/proc/scsi/scsi
fi
fi
}
# Whether or not the RMB (removable) bit has been set in the INQUIRY response.
# Uses ${host}, ${channel}, ${id} and ${lun}. Assumes that sg_device() has
# already been called. How to test this function: copy/paste this function
# in a shell and run
# (cd /sys/class/scsi_device && for d in *; do set ${d//:/ }; echo -n "$d $(</sys/class/scsi_device/${d}/device/block/*/removable) <> "; SGDEV=bsg/$d host=$1 channel=$2 id=$3 lun=$4 is_removable; done)
is_removable ()
{
local b p
p=/sys/class/scsi_device/${host}:${channel}:${id}:${lun}/device/inquiry
# Extract the second byte of the INQUIRY response and check bit 7 (mask 0x80).
b=$(od -tx1 -j1 -N1 "$p" 2>/dev/null |
{ read -r offset byte rest; echo -n "$byte"; })
if [ -n "$b" ]; then
echo $(((0x$b & 0x80) != 0))
else
sg_inq /dev/$SGDEV 2>/dev/null | sed -n 's/^.*RMB=\([0-9]*\).*$/\1/p'
fi
}
# Test if SCSI device is still responding to commands
# Return values:
# 0 device is present
# 1 device has changed
# 2 device has been removed
testonline ()
{
local ctr RC RMB
: testonline
ctr=0
RC=0
# Set default values
IPTYPE=31
IPQUAL=3
if test ! -x /usr/bin/sg_turs; then return 0; fi
sgdevice
if test -z "$SGDEV"; then return 0; fi
sg_turs /dev/$SGDEV >/dev/null 2>&1
RC=$?
# Handle in progress of becoming ready and unit attention
while test $RC = 2 -o $RC = 6 && test $ctr -le 30; do
if test $RC = 2 -a "$RMB" != "1"; then echo -n "."; let LN+=1; sleep 1
else sleep 0.02; fi
let ctr+=1
sg_turs /dev/$SGDEV >/dev/null 2>&1
RC=$?
# Check for removable device; TEST UNIT READY obviously will
# fail for a removable device with no medium
RMB=$(is_removable)
print_and_scroll_back "$host:$channel:$id:$lun $SGDEV ($RMB) "
test $RC = 2 -a "$RMB" = "1" && break
done
if test $ctr != 0; then white_out; fi
# echo -e "\e[A\e[A\e[A${yellow}Test existence of $SGDEV = $RC ${norm} \n\n\n"
if test $RC = 1; then return $RC; fi
# Reset RC (might be !=0 for passive paths)
RC=0
# OK, device online, compare INQUIRY string
INQ=`sg_inq $sg_len_arg /dev/$SGDEV 2>/dev/null`
if [ -z "$INQ" ] ; then
echo -e "\e[A\e[A\e[A\e[A${red}$SGDEV changed: ${bold}INQUIRY failed${norm} \n\n\n"
return 2
fi
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 [ "$IPQUAL" != 0 ] ; then
[ -z "$IPQUAL" ] && IPQUAL=3
[ -z "$IPTYPE" ] && IPTYPE=31
echo -e "\e[A\e[A\e[A\e[A${red}$SGDEV changed: ${bold}LU not available (PQual $IPQUAL)${norm} \n\n\n"
return 2
fi
TYPE=$(printtype $IPTYPE)
if ! procscsiscsi ; then
echo -e "\e[A\e[A\e[A\e[A${red}$SGDEV removed.\n\n\n"
return 2
fi
TMPSTR=`echo "$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' | sed 's/ *$//g'`
if [ "$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 $channel $id $lun exists
# Outputs description from /proc/scsi/scsi (unless arg passed)
# Returns SCSISTR (empty if no dev)
testexist ()
{
: testexist
SCSISTR=
if procscsiscsi && test -z "$1"; then
echo "$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
[ -d $dev ] || continue;
hcil=${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 $chan"
fi
done
if test -z "$channelsearch"; then channelsearch="0"; fi
}
# Returns the list of existing targets per host
idlist ()
{
local tmpid
local newid
local oldid
oldlist=$(ls /sys/class/scsi_device/ | sed -n "s/${host}:${channel}:\([0-9]*:[0-9]*\)/\1/p" | uniq)
# Rescan LUN 0 to check if we found new targets
echo "${channel} - 0" > /sys/class/scsi_host/host${host}/scan
newlist=$(ls /sys/class/scsi_device/ | sed -n "s/${host}:${channel}:\([0-9]*:[0-9]*\)/\1/p" | uniq)
for newid in $newlist ; do
oldid=$newid
for tmpid in $oldlist ; do
if test $newid = $tmpid ; then
oldid=
break
fi
done
if test -n "$oldid" ; then
id=${oldid%%:*}
lun=${oldid##*:}
dev=/sys/class/scsi_device/${host}:${channel}:${id}:${lun}
if [ -d $dev ] ; then
hcil=${dev##*/}
printf "\r${green}NEW: $norm"
testexist
if test "$SCSISTR" ; then
incrfound "$hcil"
fi
fi
fi
done
idsearch=$(ls /sys/class/scsi_device/ | sed -n "s/${host}:${channel}:\([0-9]*\):[0-9]*/\1/p" | uniq)
}
# Returns the list of existing LUNs from device $host $channel $id $lun
# and returns list to stdout
getluns()
{
sgdevice
if test -z "$SGDEV"; then return 1; fi
if test ! -x /usr/bin/sg_luns; then echo 0; return 1; fi
LLUN=`sg_luns /dev/$SGDEV 2>/dev/null | sed -n 's/ \(.*\)/\1/p'`
# Added -z $LLUN condition because $? gets the RC from sed, not sg_luns
if test $? != 0 -o -z "$LLUN"; then echo 0; return 1; fi
for lun in $LLUN ; do
# Swap LUN number
l0=0x$lun
l1=$(( ($l0 >> 48) & 0xffff ))
l2=$(( ($l0 >> 32) & 0xffff ))
l3=$(( ($l0 >> 16) & 0xffff ))
l4=$(( $l0 & 0xffff ))
l0=$(( ( ( ($l4 * 0xffff) + $l3 ) * 0xffff + $l2 ) * 0xffff + $l1 ))
printf "%u\n" $l0
done
return 0
}
# Wait for udev to settle (create device nodes etc.)
udevadm_settle()
{
local tmo=60
if test -x /sbin/udevadm; then
print_and_scroll_back " Calling udevadm settle (can take a while) "
# Loop for up to 60 seconds if sd devices still are settling..
# This allows us to continue if udev events are stuck on multipaths in recovery mode
while [ $tmo -gt 0 ] ; do
if ! /sbin/udevadm settle --timeout=1 | egrep -q sd[a-z]+ ; then
break;
fi
let tmo=$tmo-1
done
white_out
elif test -x /sbin/udevsettle; then
print_and_scroll_back " Calling udevsettle (can take a while) "
/sbin/udevsettle
white_out
else
sleep 0.02
fi
}
# Perform scan on a single lun $host $channel $id $lun
dolunscan()
{
local remappedlun0=
SCSISTR=
devnr="$host $channel $id $lun"
echo -e " Scanning for device $devnr ... "
printf "${yellow}OLD: $norm"
testexist
# Device exists: Test whether it's still online
# (testonline returns 2 if it's gone and 1 if it has changed)
if test "$SCSISTR" ; then
testonline
RC=$?
# Well known lun transition case. Only for Direct-Access devs (type 0)
# If block directory exists && and PQUAL != 0, we unmapped lun0 and just have a well-known lun
# If block directory doesn't exist && PQUAL == 0, we mapped a real lun0
if test $lun -eq 0 -a $IPTYPE -eq 0 ; then
if test $RC = 2 ; then
if test -e /sys/class/scsi_device/${host}:${channel}:${id}:${lun}/device; then
if test -d /sys/class/scsi_device/${host}:${channel}:${id}:${lun}/device/block ; then
remappedlun0=2 # Transition from real lun 0 to well-known
else
RC=0 # Set this so the system leaves the existing well known lun alone. This is a lun 0 with no block directory
fi
fi
elif test $RC = 0 -a $IPTYPE -eq 0; then
if test -e /sys/class/scsi_device/${host}:${channel}:${id}:${lun}/device; then
if test ! -d /sys/class/scsi_device/${host}:${channel}:${id}:${lun}/device/block ; then
remappedlun0=1 # Transition from well-known to real lun 0
fi
fi
fi
fi
fi
# Special case: lun 0 just got added (for reportlunscan),
# so make sure we correctly treat it as new
if test "$lun" = "0" -a "$1" = "1" -a -z "$remappedlun0"; then
SCSISTR=""
printf "\r\e[A\e[A\e[A"
fi
: f $remove s $SCSISTR
if test "$remove" -a "$SCSISTR" -o "$remappedlun0" = "1"; then
if test $RC != 0 -o ! -z "$forceremove" -o -n "$remappedlun0"; then
if test "$remappedlun0" != "1" ; then
echo -en "\r\e[A\e[A\e[A${red}REM: "
echo "$SCSISTR" | head -n1
echo -e "${norm}\e[B\e[B"
fi
if test -e /sys/class/scsi_device/${host}:${channel}:${id}:${lun}/device; then
# have to preemptively do this so we can figure out the mpath device
# Don't do this if we're deleting a well known lun to replace it
if test "$remappedlun0" != "1" ; then
incrrmvd "$host:$channel:$id:$lun"
fi
echo 1 > /sys/class/scsi_device/${host}:${channel}:${id}:${lun}/device/delete
sleep 0.02
else
echo "scsi remove-single-device $devnr" > /proc/scsi/scsi
if test $RC -eq 1 -o $lun -eq 0 ; then
# Try readding, should fail if device is gone
echo "scsi add-single-device $devnr" > /proc/scsi/scsi
fi
fi
fi
if test $RC = 0 -o "$forcerescan" ; 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\e[A\e[A\e[A${yellow}OLD: $norm"
testexist
if test -z "$SCSISTR" -a $RC != 1 -a "$remappedlun0" != "1"; then
printf "\r${red}DEL: $norm\r\n\n"
# In the event we're replacing with a well known node, we need to let it continue, to create the replacement node
test "$remappedlun0" != "2" && return 1
fi
fi
if test -z "$SCSISTR" -o -n "$remappedlun0"; then
if test "$remappedlun0" != "2" ; then
# Device does not exist, try to add
printf "\r${green}NEW: $norm"
fi
if test -e /sys/class/scsi_host/host${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\e[A";
# Optimization: if lun==0, stop here (only if in non-remove mode)
if test $lun = 0 -a -z "$remove" -a $optscan = 1; then
break;
fi
else
if test "$remappedlun0" != "2" ; then
incrfound "$host:$channel:$id:$lun"
fi
fi
fi
}
# Perform report lun scan on $host $channel $id using REPORT_LUNS
doreportlun()
{
lun=0
SCSISTR=
devnr="$host $channel $id $lun"
echo -en " Scanning for device $devnr ...\r"
lun0added=
#printf "${yellow}OLD: $norm"
# Phase one: If LUN0 does not exist, try to add
testexist -q
if test -z "$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
udevadm_settle
else
echo "scsi add-single-device $devnr" > /proc/scsi/scsi
fi
testexist -q
if test -n "$SCSISTR"; then
lun0added=1
#testonline
else
# Device not present
# return
# Find alternative LUN to send getluns to
for dev in /sys/class/scsi_device/${host}:${channel}:${id}:*; do
[ -d "$dev" ] || continue
lun=${dev##*:}
break
done
fi
fi
targetluns=`getluns`
REPLUNSTAT=$?
lunremove=
#echo "getluns reports " $targetluns
olddev=`find /sys/class/scsi_device/ -name "$host:$channel:$id:*" 2>/dev/null | sort -t: -k4 -n`
oldtargets="$targetluns"
# OK -- if we don't have a LUN to send a REPORT_LUNS to, we could
# fall back to wildcard scanning. Same thing if the device does not
# support REPORT_LUNS
# TODO: We might be better off to ALWAYS use wildcard scanning if
# it works
if test "$REPLUNSTAT" = "1"; then
if test -e /sys/class/scsi_host/host${host}/scan; then
echo "$channel $id -" > /sys/class/scsi_host/host${host}/scan 2> /dev/null
udevadm_settle
else
echo "scsi add-single-device $host $channel $id $SCAN_WILD_CARD" > /proc/scsi/scsi
fi
targetluns=`find /sys/class/scsi_device/ -name "$host:$channel:$id:*" 2>/dev/null | awk -F'/' '{print $5}' | awk -F':' '{print $4}' | sort -n`
let found+=`echo "$targetluns" | wc -l`
let found-=`echo "$olddev" | wc -l`
fi
if test -z "$targetluns"; then targetluns="$oldtargets"; fi
# Check existing luns
for dev in $olddev; do
[ -d "$dev" ] || continue
lun=${dev##*:}
newsearch=
inlist=
# OK, is existing $lun (still) in reported list
for tmplun in $targetluns; do
if test $tmplun -eq $lun ; then
inlist=1
dolunscan $lun0added
else
newsearch="$newsearch $tmplun"
fi
done
# OK, we have now done a lunscan on $lun and
# $newsearch is the old $targetluns without $lun
if [ -z "$inlist" ]; then
# Stale lun
lunremove="$lunremove $lun"
fi
# $lun removed from $lunsearch (echo for whitespace cleanup)
targetluns=`echo $newsearch`
done
# Add new ones and check stale ones
for lun in $targetluns $lunremove; do
dolunscan $lun0added
done
}
# Perform search (scan $host)
dosearch ()
{
if test -z "$channelsearch" ; then
chanlist
fi
for channel in $channelsearch; do
if test -z "$idsearch" ; then
if test -z "$lunsearch" ; then
idlist
else
idsearch=$(ls /sys/class/scsi_device/ | sed -n "s/${host}:${channel}:\([0-9]*\):[0-9]*/\1/p" | uniq)
fi
fi
for id in $idsearch; do
if test -z "$lunsearch" ; then
doreportlun
else
for lun in $lunsearch; do
dolunscan
done
fi
done
done
}
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 $result
}
searchexisting()
{
local tmpch;
local tmpid
local match=0
local targets=`ls -d /sys/class/scsi_device/$host:* 2> /dev/null | egrep -o $host:[0-9]+:[0-9]+ | sort | uniq`
# Nothing came back on this host, so we should skip it
test -z "$targets" && return
local target=;
for target in $targets ; do
channel=`echo $target | cut -d":" -f2`
id=`echo $target | cut -d":" -f 3`
if [ -n "$channelsearch" ] ; then
for tmpch in $channelsearch ; do
test $tmpch -eq $channel && match=1
done
else
match=1
fi
test $match -eq 0 && continue
match=0
if [ $filter_ids -eq 1 ] ; then
for tmpid in $idsearch ; do
if [ $tmpid -eq $id ] ; then
match=1
fi
done
else
match=1
fi
test $match -eq 0 && continue
if [ -z "$lunsearch" ] ; then
doreportlun
else
for lun in $lunsearch ; do
dolunscan
done
fi
done
}
# Go through all of the existing devices and figure out any that have been remapped
findremapped()
{
local hctl=;
local devs=`ls /sys/class/scsi_device/`
local sddev=
local id_serial=
local id_serial_old=
local remapped=
mpaths=""
local tmpfile=$(mktemp /tmp/rescan-scsi-bus.XXXXXXXX 2> /dev/null)
if [ -z "$tmpfile" ] ; then
tmpfile="/tmp/rescan-scsi-bus.$$"
rm -f $tmpfile
fi
# Get all of the ID_SERIAL attributes, after finding their sd node
for hctl in $devs ; do
if [ -d /sys/class/scsi_device/$hctl/device/block ] ; then
sddev=`ls /sys/class/scsi_device/$hctl/device/block`
id_serial_old=`udevadm info -q all -n $sddev | grep "ID_SERIAL=" | cut -d"=" -f2`
[ -z "$id_serial_old" ] && id_serial_old="none"
echo "$hctl $sddev $id_serial_old" >> $tmpfile
fi
done
# Trigger udev to update the info
echo -n "Triggering udev to update device information... "
/sbin/udevadm trigger
udevadm_settle 2>&1 /dev/null
echo "Done"
# See what changed and reload the respective multipath device if applicable
while read hctl sddev id_serial_old ; do
remapped=0
id_serial=`udevadm info -q all -n $sddev | grep "ID_SERIAL=" | cut -d"=" -f2`
[ -z "$id_serial" ] && id_serial="none"
if [ "$id_serial_old" != "$id_serial" ] ; then
remapped=1
fi
# If udev events updated the disks already, but the multipath device isn't update
# check for old devices to make sure we found remapped luns
if [ -n "$mp_enable" ] && [ $remapped -eq 0 ]; then
findmultipath $sddev $id_serial
if [ $? -eq 1 ] ; then
remapped=1
fi
fi
# if uuid is 1, it's unmapped, so we don't want to treat it as a remap
# if remapped flag is 0, just skip the rest of the logic
if [ "$id_serial" = "1" ] || [ $remapped -eq 0 ] ; then
continue
fi
printf "${yellow}REMAPPED: $norm"
host=`echo $hctl | cut -d":" -f1`
channel=`echo $hctl | cut -d":" -f2`
id=`echo $hctl | cut -d":" -f3`
lun=`echo $hctl | cut -d":" -f4`
procscsiscsi
echo "$SCSISTR"
incrchgd "$hctl"
done < $tmpfile
rm -f $tmpfile
if test -n "$mp_enable" -a -n "$mpaths" ; then
echo "Updating multipath device mappings"
flushmpaths
$MULTIPATH | grep "create:" 2> /dev/null
fi
}
incrfound()
{
local hctl="$1"
if test -n "$hctl" ; then
let found+=1
FOUNDDEVS="$FOUNDDEVS\t[$hctl]\n"
else
return
fi
}
incrchgd()
{
local hctl="$1"
if test -n "$hctl" ; then
if ! echo $CHGDEVS | grep -q "\[$hctl\]"; then
let updated+=1
CHGDEVS="$CHGDEVS\t[$hctl]\n"
fi
else
return
fi
if test -n "$mp_enable" ; then
local sdev="`findsddev \"$hctl\"`"
if test -n "$sdev" ; then
findmultipath "$sdev"
fi
fi
}
incrrmvd()
{
local hctl="$1"
if test -n "$hctl" ; then
let rmvd+=1;
RMVDDEVS="$RMVDDEVS\t[$hctl]\n"
else
return
fi
if test -n "$mp_enable" ; then
local sdev="`findsddev \"$hctl\"`"
if test -n "$sdev" ; then
findmultipath "$sdev"
fi
fi
}
findsddev()
{
local hctl="$1"
local sddev=
if test ! -e /sys/class/scsi_device/$hctl/device/block ; then
return 1
fi
sddev=`ls /sys/class/scsi_device/$hctl/device/block`
echo $sddev
return 0
}
addmpathtolist()
{
local mp="$1"
local mp2=
for mp2 in $mpaths ; do
# The multipath device is already in the list
if [ "$mp2" = "$mp" ] ; then
return
fi
done
mpaths="$mpaths $mp"
}
findmultipath()
{
local dev="$1"
local find_mismatch="$2"
local mp=
local mp2=
local found_dup=0
# Need a sdev, and executable multipath and dmsetup command here
if [ -z "$dev" ] || [ ! -x $DMSETUP ] || [ ! -x "$MULTIPATH" ] ; then
return 1
fi
local maj_min=`cat /sys/block/$dev/dev`
for mp in $($DMSETUP ls --target=multipath | cut -f 1) ; do
[ "$mp" = "No" ] && break;
if $DMSETUP status $mp | grep -q " $maj_min "; then
# With two arguments, look up current uuid from sysfs
# if it doesn't match what was passed, this multipath
# device is not updated, so this is a remapped LUN
if [ -n "$find_mismatch" ] ; then
mp2=$($MULTIPATH -l "$mp" | egrep -o "dm-[0-9]+")
mp2=$(cut -f2 -d- "/sys/block/$mp2/dm/uuid")
if [ "$find_mismatch" != "$mp2" ] ; then
addmpathtolist $mp
found_dup=1
fi
continue
fi
# Normal mode: Find the first multipath with the sdev
# and add it to the list
addmpathtolist $mp
return
fi
done
# Return 1 to signal that a duplicate was found to the calling function
if [ $found_dup -eq 1 ] ; then
return 1
else
return 0
fi
}
reloadmpaths()
{
local mpath
if [ ! -x "$MULTIPATH" ] ; then
echo "no -x multipath"
return
fi
# Pass 1 as the argument to reload all mpaths
if [ "$1" = "1" ] ; then
echo "Reloading all multipath devices"
$MULTIPATH -r > /dev/null 2>&1
return
fi
# Reload the multipath devices
for mpath in $mpaths ; do
echo -n "Reloading multipath device $mpath... "
$MULTIPATH -r $mpath > /dev/null 2>&1
if test "$?" = "0" ; then
echo "Done"
else
echo "Fail"
fi
done
}
resizempaths()
{
local mpath
for mpath in $mpaths ; do
echo -n "Resizing multipath map $mpath ..."
multipathd -k"resize map $mpath"
let updated+=1
done
}
flushmpaths()
{
local mpath
local remove=""
local i
local flush_retries=5
if test -n "$1" ; then
for mpath in $($DMSETUP ls --target=multipath | cut -f 1) ; do
[ "$mpath" = "No" ] && break
num=$($DMSETUP status $mpath | awk 'BEGIN{RS=" ";active=0}/[0-9]+:[0-9]+/{dev=1}/A/{if (dev == 1) active++; dev=0} END{ print active }')
if [ $num -eq 0 ] ; then
remove="$remove $mpath"
fi
done
else
remove="$mpaths"
fi
for mpath in $remove ; do
i=0
echo -n "Flushing multipath device $mpath... "
while [ $i -lt $flush_retries ] ; do
$DMSETUP message $mpath 0 fail_if_no_path > /dev/null 2>&1
$MULTIPATH -f $mpath > /dev/null 2>&1
if test "$?" = "0" ; then
echo "Done ($i retries)"
break
elif test $i -eq $flush_retries ; then
echo "Fail"
fi
sleep 0.02
let i=$i+1
done
done
}