33# scsi add-single-device mechanism
44# (c) 1998--2010 Kurt Garloff <[email protected] >, GNU GPL v2 or v3 55# (c) 2006--2008 Hannes Reinecke, GNU GPL v2 or later
6- # $Id: rescan-scsi-bus.sh,v 1.56 2012/01/14 22:23:53 garloff Exp $
6+ # $Id: rescan-scsi-bus.sh,v 1.53 2011/10/18 16:44:27 garloff Exp $
77
88SCAN_WILD_CARD=4294967295
99
@@ -216,6 +216,10 @@ sgdevice ()
216216}
217217
218218# Test if SCSI device is still responding to commands
219+ # Return values:
220+ # 0 device is present
221+ # 1 device has changed
222+ # 2 device has been removed
219223testonline ()
220224{
221225 : testonline
@@ -232,7 +236,7 @@ testonline ()
232236 print_and_scroll_back " $host :$channel :$id :$lun $SGDEV ($RMB ) "
233237 fi
234238 while test $RC = 2 -o $RC = 6 && test $ctr -le 8; do
235- if test $RC = 2 -a " $RMB " ! = " 1" ; then echo -n " ." ; let $ LN; sleep 1
239+ if test $RC = 2 -a " $RMB " ! = " 1" ; then echo -n " ." ; let LN+=1; sleep 1
236240 else usleep 20000; fi
237241 let ctr+=1
238242 sg_turs /dev/$SGDEV > /dev/null 2>&1
@@ -257,7 +261,10 @@ testonline ()
257261 fi
258262
259263 TYPE=$( printtype $IPTYPE )
260- procscsiscsi
264+ if ! procscsiscsi ; then
265+ echo -e " \e[A\e[A\e[A\e[A${red} $SGDEV removed.\n\n\n"
266+ return 2
267+ fi
261268 TMPSTR=` echo " $SCSISTR " | grep ' Vendor:' `
262269 if [ " $TMPSTR " != " $STR " ; then
263270 echo -e " \e[A\e[A\e[A\e[A${red} $SGDEV changed: ${bold} \nfrom:${SCSISTR#* } \nto: $STR ${norm} \n\n\n"
@@ -313,25 +320,34 @@ chanlist ()
313320idlist ()
314321{
315322 local hcil
316- local cil
317- local il
318323 local target
319324 local tmpid
320-
321- for dev in /sys/class/scsi_device/${host} :${channel} :* ; do
322- [ -d $dev ] || continue ;
323- hcil=${dev##*/ }
324- cil=${hcil#*: }
325- il=${cil#*: }
326- target=${il%%:* }
325+ local newid
326+
327+ idsearch=$( ls /sys/class/scsi_device/ | sed -n " s/${host} :${channel} :\([0-9]*\):[0-9]*/\1/p" | uniq)
328+ echo " ${channel} - -" > /sys/class/scsi_host/host${host} /scan
329+ # Rescan to check if we found new targets
330+ newsearch=$( ls /sys/class/scsi_device/ | sed -n " s/${host} :${channel} :\([0-9]*\):[0-9]*/\1/p" | uniq)
331+ for id in $newsearch ; do
332+ newid=$id
327333 for tmpid in $idsearch ; do
328- if test " $target " $tmpid ; then
329- target =
334+ if test $id -eq $tmpid ; then
335+ newid =
330336 break
331337 fi
332338 done
333- if test -n " $target " ; then
334- idsearch=" $idsearch $target "
339+ if test -n " $newid " ; then
340+ id=$newid
341+ for dev in /sys/class/scsi_device/${host} :${channel} :${newid} :* ; do
342+ [ -d $dev ] || continue ;
343+ hcil=${dev##*/ }
344+ lun=${hcil##*: }
345+ printf " \r${green} NEW: $norm "
346+ testexist
347+ if test " $SCSISTR " ; then
348+ let found+=1
349+ fi
350+ done
335351 fi
336352 done
337353}
@@ -392,7 +408,7 @@ dolunscan()
392408 : f $remove s $SCSISTR
393409 if test " $remove " " $SCSISTR " ; then
394410 # Device exists: Test whether it's still online
395- # (testonline returns 1 if it's gone or has changed)
411+ # (testonline returns 2 if it's gone and 1 if it has changed)
396412 testonline
397413 RC=$?
398414 if test $RC ! = 0 -o ! -z " $forceremove " ; then
@@ -420,7 +436,7 @@ dolunscan()
420436 fi
421437 printf " \r\e[A\e[A\e[A${yellow} OLD: $norm "
422438 testexist
423- if test -z " $SCSISTR " ; then
439+ if test -z " $SCSISTR " -a $RC ! = 1 ; then
424440 printf " \r${red} DEL: $norm \r\n\n"
425441 let rmvd+=1;
426442 return 1
@@ -590,9 +606,12 @@ if test @$1 = @--help -o @$1 = @-h -o @$1 = @-?; then
590606 echo " -w scan for target device IDs 0--15 [default: 0--7]"
591607 echo " -c enables scanning of channels 0 1 [default: 0 / all detected ones]"
592608 echo " -r enables removing of devices [default: disabled]"
609+ echo " -f flush failed multipath devices [default: disabled]"
593610 echo " -i issue a FibreChannel LIP reset [default: disabled]"
594611 echo " --remove: same as -r"
612+ echo " --flush: same as -f"
595613 echo " --issue-lip: same as -i"
614+ echo " --wide: same as -w"
596615 echo " --forcerescan: Rescan existing devices"
597616 echo " --forceremove: Remove and readd every device (DANGEROUS)"
598617 echo " --nooptscan: don't stop looking for LUNs is 0 is not found"
@@ -623,16 +642,13 @@ modprobe sg >/dev/null 2>&1
623642
624643if test -x /usr/bin/sg_inq; then
625644 sg_version=$( sg_inq -V 2>&1 | cut -d " " )
626- sg_version=${sg_version/ . / }
645+ sg_version=${sg_version## 0. }
627646 # echo "\"$sg_version\""
628647 if [ -z " $sg_version " -o " $sg_version " -lt 70 ] ; then
629648 sg_len_arg=" -36"
630649 else
631650 sg_len_arg=" --len=36"
632651 fi
633- else
634- echo " WARN: /usr/bin/sg_inq not present -- please install sg3_utils"
635- echo " or rescan-scsi-bus.sh might not fully work."
636652fi
637653
638654# defaults
@@ -656,12 +672,14 @@ opt="$1"
656672while test ! -z " $opt " " ${opt## -* } " ; do
657673 opt=${opt# -}
658674 case " $opt " in
675+ f) flush=1 ;;
659676 l) lunsearch=` seq 0 7`
660677 L) lunsearch=` seq 0 $2 ` ; shift ;;
661678 w) opt_idsearch=` seq 0 15`
662679 c) opt_channelsearch=" 0 1"
663680 r) remove=1 ;;
664681 i) lipreset=1 ;;
682+ -flush) flush=1 ;;
665683 -remove) remove=1 ;;
666684 -forcerescan) remove=1; forcerescan=1 ;;
667685 -forceremove) remove=1; forceremove=1 ;;
@@ -678,6 +696,7 @@ while test ! -z "$opt" -a -z "${opt##-*}"; do
678696 -reportlun2) scan_flags=$(( $scan_flags | 0x20000 ))
679697 -largelun) scan_flags=$(( $scan_flags | 0x200 ))
680698 -sparselun) scan_flags=$(( scan_flags| 0x40 ))
699+ -wide) opt_idsearch=` seq 0 15`
681700 * ) echo " Unknown option -$opt !"
682701 esac
683702 shift
@@ -706,10 +725,27 @@ if test -w /sys/module/scsi_mod/parameters/default_dev_flags -a $scan_flags != 0
706725 unset OLD_SCANFLAGS
707726 fi
708727fi
709- echo " Scanning SCSI subsystem for new devices"
710- test -z " $remove " || echo " and remove devices that have disappeared"
728+ DMSETUP=$( which dmsetup)
729+ [ -z " $DMSETUP " && flush=
730+ MULTIPATH=$( which multipath)
731+ [ -z " $MULTIPATH " && flush=
732+
733+ echo -n " Scanning SCSI subsystem for new devices"
734+ test -z " $flush " || echo -n " , flush failed multipath devices,"
735+ test -z " $remove " || echo -n " and remove devices that have disappeared"
736+ echo
711737declare -i found=0
712738declare -i rmvd=0
739+
740+ if [ -n " $flush " -a -x $MULTIPATH ] ; then
741+ for mpath in $( $DMSETUP ls --target=multipath | cut -f 1) ; do
742+ num=$( $DMSETUP status $mpath | awk ' BEGIN{RS=" ";active=0}/[0-9]+:[0-9]+/{dev=1}/A/{if (dev == 1) active++; dev=0} END{ print active }' )
743+ if [ $num -eq 0 ] ; then
744+ $DMSETUP message $mpath 0 fail_if_no_path
745+ $MULTIPATH -f $mpath
746+ fi
747+ done
748+ fi
713749for host in $hosts ; do
714750 echo -n " Scanning host $host "
715751 if test -e /sys/class/fc_host/host$host ; then
@@ -718,11 +754,6 @@ for host in $hosts; do
718754 echo 1 > /sys/class/fc_host/host$host /issue_lip 2> /dev/null;
719755 udevadm_settle
720756 fi
721- # We used to always trigger a rescan for FC to update channels and targets
722- # Commented out -- as discussed with Hannes we should rely
723- # on the main loop doing the scan, no need to do it here.
724- # echo "- - -" > /sys/class/scsi_host/host$host/scan 2> /dev/null;
725- # udevadm_settle
726757 channelsearch=
727758 idsearch=
728759 else
746777if test -n " $OLD_SCANFLAGS " ; then
747778 echo $OLD_SCANFLAGS > /sys/module/scsi_mod/parameters/default_dev_flags
748779fi
749- echo " $found new device(s) found. "
780+ echo " $found new or changed device(s) found. "
750781echo " $rmvd device(s) removed. "
751782
752783# Local Variables:
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