vdev_id: extension for new scsi topology
On systems with SCSI rather than SAS disk topology, this change enables the vdev_id script to match against the block device path, and therefore create a vdev alias in /dev/disk/by-vdev. Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Simon Guest <simon.guest@tesujimath.org> Closes #6592
This commit is contained in:
Simon Guest
Brian Behlendorf
parent
0c484ab567
commit
269db7a4b3
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@ -100,7 +100,7 @@ usage() {
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cat << EOF
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Usage: vdev_id [-h]
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vdev_id <-d device> [-c config_file] [-p phys_per_port]
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[-g sas_direct|sas_switch] [-m]
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[-g sas_direct|sas_switch|scsi] [-m]
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-c specify name of alernate config file [default=$CONFIG]
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-d specify basename of device (i.e. sda)
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@ -135,7 +135,7 @@ map_channel() {
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MAPPED_CHAN=`awk "\\$1 == \"channel\" && \\$2 == ${PORT} \
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{ print \\$3; exit }" $CONFIG`
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;;
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"sas_direct")
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"sas_direct"|"scsi")
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MAPPED_CHAN=`awk "\\$1 == \"channel\" && \
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\\$2 == \"${PCI_ID}\" && \\$3 == ${PORT} \
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{ print \\$4; exit }" $CONFIG`
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@ -289,6 +289,117 @@ sas_handler() {
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echo ${CHAN}${SLOT}${PART}
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}
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scsi_handler() {
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if [ -z "$FIRST_BAY_NUMBER" ] ; then
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FIRST_BAY_NUMBER=`awk "\\$1 == \"first_bay_number\" \
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{print \\$2; exit}" $CONFIG`
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fi
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FIRST_BAY_NUMBER=${FIRST_BAY_NUMBER:-0}
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if [ -z "$PHYS_PER_PORT" ] ; then
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PHYS_PER_PORT=`awk "\\$1 == \"phys_per_port\" \
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{print \\$2; exit}" $CONFIG`
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fi
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PHYS_PER_PORT=${PHYS_PER_PORT:-4}
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if ! echo $PHYS_PER_PORT | grep -q -E '^[0-9]+$' ; then
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echo "Error: phys_per_port value $PHYS_PER_PORT is non-numeric"
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exit 1
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fi
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if [ -z "$MULTIPATH_MODE" ] ; then
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MULTIPATH_MODE=`awk "\\$1 == \"multipath\" \
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{print \\$2; exit}" $CONFIG`
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fi
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# Use first running component device if we're handling a dm-mpath device
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if [ "$MULTIPATH_MODE" = "yes" ] ; then
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# If udev didn't tell us the UUID via DM_NAME, check /dev/mapper
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if [ -z "$DM_NAME" ] ; then
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DM_NAME=`ls -l --full-time /dev/mapper |
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awk "/\/$DEV$/{print \\$9}"`
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fi
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# For raw disks udev exports DEVTYPE=partition when
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# handling partitions, and the rules can be written to
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# take advantage of this to append a -part suffix. For
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# dm devices we get DEVTYPE=disk even for partitions so
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# we have to append the -part suffix directly in the
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# helper.
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if [ "$DEVTYPE" != "partition" ] ; then
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PART=`echo $DM_NAME | awk -Fp '/p/{print "-part"$2}'`
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fi
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# Strip off partition information.
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DM_NAME=`echo $DM_NAME | sed 's/p[0-9][0-9]*$//'`
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if [ -z "$DM_NAME" ] ; then
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return
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fi
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# Get the raw scsi device name from multipath -ll. Strip off
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# leading pipe symbols to make field numbering consistent.
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DEV=`multipath -ll $DM_NAME |
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awk '/running/{gsub("^[|]"," "); print $3 ; exit}'`
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if [ -z "$DEV" ] ; then
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return
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fi
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fi
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if echo $DEV | grep -q ^/devices/ ; then
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sys_path=$DEV
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else
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sys_path=`udevadm info -q path -p /sys/block/$DEV 2>/dev/null`
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fi
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# expect sys_path like this, for example:
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# /devices/pci0000:00/0000:00:0b.0/0000:09:00.0/0000:0a:05.0/0000:0c:00.0/host3/target3:1:0/3:1:0:21/block/sdv
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# Use positional parameters as an ad-hoc array
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set -- $(echo "$sys_path" | tr / ' ')
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num_dirs=$#
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scsi_host_dir="/sys"
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# Get path up to /sys/.../hostX
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i=1
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while [ $i -le $num_dirs ] ; do
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d=$(eval echo \${$i})
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scsi_host_dir="$scsi_host_dir/$d"
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echo $d | grep -q -E '^host[0-9]+$' && break
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i=$(($i + 1))
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done
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if [ $i = $num_dirs ] ; then
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return
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fi
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PCI_ID=$(eval echo \${$(($i -1))} | awk -F: '{print $2":"$3}')
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# In scsi mode, the directory two levels beneath
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# /sys/.../hostX reveals the port and slot.
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port_dir=$scsi_host_dir
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j=$(($i + 2))
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i=$(($i + 1))
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while [ $i -le $j ] ; do
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port_dir="$port_dir/$(eval echo \${$i})"
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i=$(($i + 1))
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done
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set -- $(echo $port_dir | sed -e 's/^.*:\([^:]*\):\([^:]*\)$/\1 \2/')
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PORT=$1
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SLOT=$(($2 + $FIRST_BAY_NUMBER))
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if [ -z "$SLOT" ] ; then
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return
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fi
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CHAN=`map_channel $PCI_ID $PORT`
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SLOT=`map_slot $SLOT $CHAN`
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if [ -z "$CHAN" ] ; then
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return
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fi
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echo ${CHAN}${SLOT}${PART}
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}
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alias_handler () {
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# Special handling is needed to correctly append a -part suffix
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# to partitions of device mapper devices. The DEVTYPE attribute
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@ -394,6 +505,9 @@ if [ -z "$ID_VDEV" ] ; then
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sas_direct|sas_switch)
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ID_VDEV=`sas_handler`
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;;
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scsi)
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ID_VDEV=`scsi_handler`
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;;
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*)
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echo "Error: unknown topology $TOPOLOGY"
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exit 1
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@ -4,6 +4,7 @@ pkgsysconf_DATA = \
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vdev_id.conf.alias.example \
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vdev_id.conf.sas_direct.example \
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vdev_id.conf.sas_switch.example \
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vdev_id.conf.multipath.example
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vdev_id.conf.multipath.example \
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vdev_id.conf.scsi.example
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EXTRA_DIST = $(pkgsysconf_DATA)
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@ -0,0 +1,9 @@
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multipath no
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topology scsi
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phys_per_port 1
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# Usually scsi disks are numbered from 0, but this can be offset, to
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# match the physical bay numbers, as follows:
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first_bay_number 1
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# PCI_ID HBA PORT CHANNEL NAME
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channel 0c:00.0 0 Y
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