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multipath-tools/multipath-tools-add-dm_linear

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diff --git a/kpartx/Makefile b/kpartx/Makefile
index d970d29..e6a7296 100644
--- a/kpartx/Makefile
+++ b/kpartx/Makefile
@@ -37,8 +37,10 @@ $(MULTIPATHLIB)-$(BUILD).a:
install: $(EXEC) $(EXEC).8
$(INSTALL_PROGRAM) -d $(DESTDIR)$(bindir)
$(INSTALL_PROGRAM) -m 755 $(EXEC) $(DESTDIR)$(bindir)
+ $(INSTALL_PROGRAM) -m 755 activate_dm_linear $(DESTDIR)$(bindir)
$(INSTALL_PROGRAM) -d $(DESTDIR)$(libudevdir)
$(INSTALL_PROGRAM) -m 755 kpartx_id $(DESTDIR)$(libudevdir)
+ $(INSTALL_PROGRAM) -m 755 dm_linear $(DESTDIR)$(libudevdir)
$(INSTALL_PROGRAM) -d $(DESTDIR)/etc/udev/rules.d
$(INSTALL_PROGRAM) -m 644 kpartx.rules $(DESTDIR)/etc/udev/rules.d/70-kpartx.rules
$(INSTALL_PROGRAM) -d $(DESTDIR)$(mandir)
@@ -46,6 +48,11 @@ install: $(EXEC) kpartx_id $(EXEC).8
uninstall:
rm -f $(DESTDIR)$(bindir)/$(EXEC)
+ rm -f $(DESTDIR)$(bindir)/activate_dm_linear
+ rm -f $(DESTDIR)$(libudevdir)/kpartx_id
+ rm -f $(DESTDIR)$(libudevdir)/dm_linear
+ rm -f $(DESTDIR)/etc/udev/rules.d/70-kpartx.rules
+ rm -f $(DESTDIR)$(mandir)/$(EXEC).8
clean:
rm -f core *.o $(EXEC)
diff --git a/kpartx/activate_dm_linear b/kpartx/activate_dm_linear
new file mode 100644
index 0000000..7481bd4
--- /dev/null
+++ b/kpartx/activate_dm_linear
@@ -0,0 +1,76 @@
+#!/bin/sh
+#
+# activate_dm_linear
+#
+# Activate a linear mapping on top of an existing block device.
+# This allows for partitions to be mapped via kpartx, so all
+# partitions on a device can be accessed.
+#
+
+RULE=/etc/udev/rules.d/62-dm_linear.rules
+
+if [ -z "$1" ] ; then
+ echo "Usage: $0 [-d] devname"
+ exit 1
+fi
+
+if [ "$1" == "-d" ] ; then
+ remove_only=1
+ shift
+fi
+
+if [ ! -b "$1" ] ; then
+ echo "$1 is not a block device"
+ exit 1
+fi
+
+dev=${1#/dev/}
+
+if [ ! -d /sys/block/$dev ] ; then
+ echo "$1 is not a disk device"
+ exit 1
+fi
+
+blksize=$(/sbin/blockdev --getsize $1)
+if [ $? -ne 0 ] ; then
+ echo "blockdev --getsize $1 failed: $?"
+ exit 1
+fi
+
+for link in $(udevinfo -q symlink -p /block/$dev) ; do
+ case "$link" in
+ */by-id/ata*)
+ atalink=${link#*/by-id/ata-}
+ ;;
+ */by-id/scsi*)
+ scsilink=${link#*/by-id/scsi-}
+ ;;
+ esac
+done
+if [ "$atalink" ] ; then
+ serial="$atalink"
+ bus="ata"
+fi
+if [ "$scsilink" ] ; then
+ unset atalink
+ serial="$scsilink"
+ bus="scsi"
+fi
+if [ "$serial" ]; then
+ # Remove existing rules
+ echo "/$serial/d
+w
+q
+" | ed $RULE > /dev/null 2>&1
+ [ "$remove_only" = 1 ] && exit 0
+ # And create a new one
+ if [ "$atalink" ] ; then
+ cat >> $RULE <<EOF
+ACTION=="add", KERNEL=="sd*[!0-9]", ENV{ID_VENDOR}=="ATA", ENV{ID_ATA_COMPAT}=="$serial", RUN+="dm_linear /dev/\$kernel $blksize ata-\$env{ID_ATA_COMPAT}"
+EOF
+ else
+ cat >> $RULE <<EOF
+ACTION=="add", KERNEL=="sd*[!0-9]", ENV{ID_BUS}=="$bus", ENV{ID_SERIAL}=="$serial", RUN+="dm_linear \$kernel /dev/$blksize \$env{ID_BUS}-\$env{ID_SERIAL}"
+EOF
+ fi
+fi
diff --git a/kpartx/dm_linear b/kpartx/dm_linear
new file mode 100755
index 0000000..d1de7e4
--- /dev/null
+++ b/kpartx/dm_linear
@@ -0,0 +1,27 @@
+#!/bin/sh
+#
+# Create a linear table on top of a given device
+# usage:
+# dm_linear <dev> <size> <name>
+#
+
+if [ -z "$1" ] ; then
+ exit 1
+fi
+
+if [ ! -b "$1" ] ; then
+ exit 2
+fi
+
+if [ -z "$2" ] ; then
+ exit 3
+fi
+
+if [ -z "$3" ] ; then
+ exit 4
+fi
+
+echo 0 $2 linear $1 0 | /sbin/dmsetup create "$3" -u "linear-$3"
+
+exit $?
+
diff --git a/kpartx/kpartx.rules b/kpartx/kpartx.rules
index 9ab9a49..2746eff 100644
--- a/kpartx/kpartx.rules
+++ b/kpartx/kpartx.rules
@@ -21,6 +21,10 @@ ENV{DM_UUID}=="mpath-*", \
ENV{DM_UUID}=="dmraid-*", \
SYMLINK+="disk/by-id/$env{DM_TYPE}-$env{DM_NAME}"
+# Create persistent links for linear tables
+ENV{DM_UUID}=="linear-*", \
+ SYMLINK+="disk/by-id/$env{DM_TYPE}-$env{DM_NAME}"
+
# Create persistent links for partitions
ENV{DM_PART}=="?*", \
SYMLINK+="disk/by-id/$env{DM_TYPE}-$env{DM_NAME}-part$env{DM_PART}"
@@ -30,6 +34,8 @@ ENV{DM_STATE}=="ACTIVE", ENV{DM_UUID}=="mpath-*", \
RUN+="/sbin/kpartx -a -p _part /dev/$kernel"
ENV{DM_STATE}=="ACTIVE", ENV{DM_UUID}=="dmraid-*", \
RUN+="/sbin/kpartx -a -p -part /dev/$kernel"
+ENV{DM_STATE}=="ACTIVE", ENV{DM_UUID}=="linear-*", \
+ RUN+="/sbin/kpartx -a -p _part /dev/$kernel"
LABEL="kpartx_end"
diff --git a/kpartx/kpartx_id b/kpartx/kpartx_id
index 81f32bf..c402e98 100644
--- a/kpartx/kpartx_id
+++ b/kpartx/kpartx_id
@@ -50,7 +50,7 @@ else
fi
# Set the name of the table. We're only interested in dmraid,
-# multipath, and kpartx tables; everything else is ignored.
+# multipath, linear, and kpartx tables; everything else is ignored.
if [ "$dmtbl" = "part" ] ; then
# The name of the kpartx table is the name of the parent table
dmname=$($DMSETUP info -c --noheadings -o name -u $dmuuid)
@@ -61,6 +61,10 @@ if [ "$dmtbl" = "part" ] ; then
mpath-*)
dmdeps=$($DMSETUP deps -u $dmuuid)
;;
+ linear-*)
+ dmtbl=linear
+ dmuuid=${dmuuid#*-}
+ ;;
esac
elif [ "$dmtbl" = "mpath" ] ; then
dmname=$tblname
@@ -72,8 +76,8 @@ fi
[ -n "$dmpart" ] && echo "DM_PART=$dmpart"
-# Figure out the type of the map. For non-multipath maps it's
-# always 'raid'.
+# Figure out the type of the map. For non-multipath non-linear
+# maps it's always 'raid'.
if [ -n "$dmdeps" ] ; then
case "$dmdeps" in
*\(94,*)
@@ -86,6 +90,9 @@ if [ -n "$dmdeps" ] ; then
echo "DM_TYPE=scsi"
;;
esac
+elif [ "$dmtbl" = linear ]; then
+ echo "DM_TYPE=${dmuuid%%-*}"
+ echo "DM_NAME=${dmuuid#*-}"
else
echo "DM_TYPE=raid"
fi
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