X-Git-Url: https://git.pld-linux.org/?a=blobdiff_plain;f=mod-multipath.sh;h=559eb5546ed7c8079fb78fddc62a2a196370e8a5;hb=ad5033d7e704edaf52f2be18d4aa98c378179ede;hp=9af9b6e781e4be3f2d8e8fee50de2d2bb9ccd806;hpb=b02a6b13349bc8400580be9e078668b41876bc6e;p=projects%2Fgeninitrd.git

diff --git a/mod-multipath.sh b/mod-multipath.sh
index 9af9b6e..559eb55 100644
--- a/mod-multipath.sh
+++ b/mod-multipath.sh
@@ -1,19 +1,21 @@
 #!/bin/sh
-#
 # geninitrd mod: dm-multipath
+USE_MULTIPATH=${USE_MULTIPATH:-yes}
 
 # if we should init dm-multipath at boot
 have_multipath=no
 
-if [ -x /sbin/multipath ]; then
-	USE_MULTIPATH=yes
-else
-	USE_MULTIPATH=no
-fi
-
 # dm-multipath wwid which is used for rootfs
 MPATH_WWID=
 
+# setup geninitrd module
+# @access	public
+setup_mod_multipath() {
+	if [ ! -x /sbin/multipath ]; then
+		USE_MULTIPATH=no
+	fi
+}
+
 # return true if node is multipath controlled
 # @param	string $node device node to be examined
 # @access	public
@@ -21,7 +23,7 @@ is_multipath() {
 	local devpath="$1"
 
 	# multipath disabled
-	if ! is_yes "$USE_MULTIPATH"; then
+	if is_no "$USE_MULTIPATH"; then
 		return 1
 	fi
 
@@ -33,10 +35,12 @@ is_multipath() {
 	DM_NAME=
 	eval $(dm_export "$devpath")
 	if [ -z "$DM_NAME" ]; then
-		die "dm_export failed unexpectedly"
+		die "Couldn't extract DM_NAME from $devpath"
 	fi
 
 	local MPATH_WWID=${DM_UUID##*-}
+
+	# just check if it is valid.
 	local info=$(multipath -l $MPATH_WWID)
 	if [ -z "$info" ]; then
 		return 1
@@ -56,7 +60,7 @@ find_modules_multipath() {
 	DM_NAME=
 	eval $(dm_export "$devpath")
 	if [ -z "$DM_NAME" ]; then
-		die "dm_export failed unexpectedly"
+		die "Couldn't extract DM_NAME from $devpath"
 	fi
 
 	# Partition:
@@ -72,22 +76,24 @@ find_modules_multipath() {
 		return 1
 	fi
 
-	debug "Finding modules for dm-multipath (WWID=$MPATH_WWID)"
+	verbose "Finding modules for dm-multipath (WWID=$MPATH_WWID)"
 	have_multipath=yes
-	local dev phydevs=$(echo "$info" | awk '$2 ~ /^[0-9]+:[0-9]+:[0-9]+:[0-9]+$/{printf("/dev/%s\n", $3)}')
-	for dev in $phydevs; do
-		find_modules_for_devpath $dev
-		lvm_ignore_devices="$lvm_ignore_devices $dev"
+
+	local p list
+	list=$(mp_parse_devs "$info")
+	for p in $list; do
+		find_modules_for_devpath $p
+		lvm_ignore_devices="$lvm_ignore_devices $p"
 	done
 
-	local hw hwhandlers=$(echo "$info" | awk '/hwhandler=1/{sub(/.*hwhandler=1 /, ""); sub(/\]$/, ""); print}')
-	for hw in $hwhandlers; do
-		find_module "dm-$hw"
+	list=$(mp_parse_hwhandler "$info")
+	for p in $list; do
+		find_module "$p"
 	done
 
-	local target targets=$(echo "$info" | awk '/prio=/{print $2}' | sort -u)
-	for target in $targets; do
-		find_module "dm-$target"
+	list=$(mp_parse_policy "$info")
+	for p in $list; do
+		find_module "dm-$p"
 	done
 
 	find_module "dm-mod"
@@ -97,17 +103,35 @@ find_modules_multipath() {
 # generate initrd fragment
 # @access	public
 initrd_gen_multipath() {
+	if ! is_yes "$have_multipath"; then
+		return
+	fi
+
 	inst_d /sbin /lib/udev /etc/multipath
 	inst_exec /sbin/kpartx /sbin
 	inst_exec /sbin/multipath /sbin
 
 	# for udev callouts
-	inst_exec /sbin/scsi_id /lib/udev
-	inst_exec /sbin/mpath* /sbin
-	egrep -v '^([ 	]*$|#)' /etc/multipath.conf > $DESTDIR/etc/multipath.conf
+	local scsi_id=$(find_tool $(get_libdir /LIBDIR/udev/scsi_id) /lib/udev/scsi_id /sbin/scsi_id)
+	inst_exec $scsi_id /lib/udev
+
+	local installed=0
+	for _lib in $(get_libdir LIBDIR); do
+		if [ -d /$_lib/multipath ]; then
+			inst_d /$_lib/multipath
+			inst_exec /$_lib/multipath/* /$_lib/multipath
+			installed=1
+			break
+		fi
+	done
+	if [ "$installed" -eq 0 ]; then
+		inst_exec /sbin/mpath* /sbin
+	fi
+
+	grep -Ev '^([ 	]*$|#)' /etc/multipath.conf > $DESTDIR/etc/multipath.conf
 
 	if [ -f /etc/multipath/bindings ]; then
-		egrep -v '^([ 	]*$|#)' /etc/multipath/bindings > $DESTDIR/etc/multipath/bindings
+		grep -Ev '^([ 	]*$|#)' /etc/multipath/bindings > $DESTDIR/etc/multipath/bindings
 	else
 		touch $DESTDIR/etc/multipath/bindings
 	fi
@@ -173,3 +197,103 @@ dm_export() {
 	esac
 }
 
+# parse blockdevices behind multipath device
+# takes 'multipath -l' output as input
+mp_parse_devs() {
+	local info="$1"
+
+	# parse "0:0:1:0 sdf" -> /dev/sdf
+	#
+	# multipath-tools-0.4.8-0.12.amd64
+	# LUN-02 (36006016002c11800ce520d27c6ebda11) dm-0 DGC     ,RAID 10
+	# [size=12G][features=1 queue_if_no_path][hwhandler=1 emc]
+	# \_ round-robin 0 [prio=0][active]
+	#  \_ 0:0:0:0 sda 8:0   [active][undef]
+	# \_ round-robin 0 [prio=0][enabled]
+	#  \_ 0:0:1:0 sdf 8:80  [active][undef]
+	#
+	# multipath-tools-0.4.8-9.x86_64
+	# LUN-14 (36006016002c118006f4f8bccc7fada11) dm-3 ,
+	# size=7.0G features='0' hwhandler='0' wp=rw
+	# |-+- policy='round-robin 0' prio=-1 status=enabled
+	# | `- #:#:#:# sde 8:64 failed undef running
+	# `-+- policy='round-robin 0' prio=-1 status=active
+	#   `- #:#:#:# sdb 8:16 active undef running
+
+	echo "$info" | awk '{
+		if (match($0, /[#0-9]+:[#0-9]+:[#0-9]+:[#0-9]+ [^ ]+ [0-9]+:[0-9]/)) {
+			# take whole matched part into "l" variable
+			l = substr($0, RSTART, RLENGTH);
+			split(l, a, " ");
+			printf("/dev/%s\n", a[2])
+		}
+	}'
+}
+
+# parse policy output for each device
+# takes 'multipath -l' output as input
+mp_parse_policy() {
+	local info="$1"
+
+	# multipath-tools-0.4.8-0.12.amd64
+	# LUN-02 (36006016002c11800ce520d27c6ebda11) dm-0 DGC     ,RAID 10
+	# [size=12G][features=1 queue_if_no_path][hwhandler=1 emc]
+	# \_ round-robin 0 [prio=0][active]
+	#  \_ 0:0:0:0 sda 8:0   [active][undef]
+	# \_ round-robin 0 [prio=0][enabled]
+	#  \_ 0:0:1:0 sdf 8:80  [active][undef]
+	#
+	# multipath-tools-0.4.8-9.x86_64
+	# LUN-14 (36006016002c118006f4f8bccc7fada11) dm-3 ,
+	# size=7.0G features='0' hwhandler='0' wp=rw
+	# |-+- policy='round-robin 0' prio=-1 status=enabled
+	# | `- #:#:#:# sde 8:64 failed undef running
+	# `-+- policy='round-robin 0' prio=-1 status=active
+	#   `- #:#:#:# sdb 8:16 active undef running
+
+	echo "$info" | awk '
+		# multipath-tools-0.4.8-0.12.amd64
+		/\[prio=/{
+			print $2
+		}
+		# multipath-tools-0.4.8-9.x86_64
+		/policy=/{
+			if (match($0, /policy=[^ ]+/)) {
+				# take whole matched part into "l" variable
+				l = substr($0, RSTART, RLENGTH);
+				# remove policy= and single quote,
+				# which we can not use in this awk inline script, therefore the %c hack
+				sub(sprintf("^policy=%c?", 39), "", l);
+				print l
+			}
+		}
+	' | sort -u
+}
+
+# parse hwhandler from multipath output
+# takes 'multipath -l' output as input
+mp_parse_hwhandler() {
+	local info="$1"
+
+	# TODO: actually the dm-emc vs scsi-dh-emc is dependant on kernel version
+	# not version of the tools installed
+
+	# multipath-tools-0.4.8-0.12.amd64
+	# [size=12G][features=1 queue_if_no_path][hwhandler=1 emc]
+	#
+	# multipath-tools-0.4.8-11.x86_64
+	# size=7.0G features='0' hwhandler='0' wp=rw
+	# size=2.0G features='1 queue_if_no_path' hwhandler='1 emc' wp=rw
+	echo "$info" | sed -ne "
+		# multipath-tools-0.4.8-0.12.amd64
+		/\[hwhandler=1/{
+			s,^.*\[hwhandler=1 \([^]]*\)\].*$,dm-\1,
+			p
+		}
+		# multipath-tools-0.4.8-11.x86_64
+		/hwhandler='1/{
+			s,^.*hwhandler='1 \([^']*\)'.*$,scsi-dh-\1,
+			p
+		}
+	" | sort -u
+}