diff options
Diffstat (limited to 'cmd')
| -rwxr-xr-x | cmd/vdev_id/vdev_id | 357 |
1 files changed, 215 insertions, 142 deletions
diff --git a/cmd/vdev_id/vdev_id b/cmd/vdev_id/vdev_id index d133e162d..6ba167ea0 100755 --- a/cmd/vdev_id/vdev_id +++ b/cmd/vdev_id/vdev_id @@ -11,13 +11,17 @@ # default numbering is unsatisfactory. The drive aliases will be # created as symbolic links in /dev/disk/by-vdev. # -# The only currently supported topologies are sas_direct and -# sas_switch. A multipath mode is supported in which dm-mpath -# devices are handled by examining the first-listed running -# component disk. In multipath mode the configuration file -# should contain a channel definition with the same name for -# each path to a given enclosure. - +# The currently supported topologies are sas_direct and sas_switch. +# A multipath mode is supported in which dm-mpath devices are +# handled by examining the first-listed running component disk. In +# multipath mode the configuration file should contain a channel +# definition with the same name for each path to a given enclosure. +# +# The alias keyword provides a simple way to map already-existing +# device symlinks to more convenient names. It is suitable for +# small, static configurations or for sites that have some automated +# way to generate the mapping file. +# # # Some example configuration files are given below. @@ -72,12 +76,19 @@ # channel 86:00.0 1 A # channel 86:00.0 0 B +# # +# # Example vdev_id.conf - alias +# # +# +# # by-vdev +# # name fully qualified or base name of device link +# alias d1 /dev/disk/by-id/wwn-0x5000c5002de3b9ca +# alias d2 wwn-0x5000c5002def789e + PATH=/bin:/sbin:/usr/bin:/usr/sbin CONFIG=/etc/zfs/vdev_id.conf PHYS_PER_PORT= DEV= -SLOT_MAP= -CHANNEL_MAP= MULTIPATH= TOPOLOGY= @@ -128,14 +139,188 @@ map_channel() { printf "%s" ${MAPPED_CHAN} } -while getopts 'c:s:d:g:mp:h' OPTION; do +sas_handler() { + if [ -z "$PHYS_PER_PORT" ] ; then + PHYS_PER_PORT=`awk "/^phys_per_port /{print \\$2;exit}" $CONFIG` + fi + PHYS_PER_PORT=${PHYS_PER_PORT:-4} + if ! echo $PHYS_PER_PORT | grep -q -E '^[0-9]+$' ; then + echo "Error: phys_per_port value $PHYS_PER_PORT is non-numeric" + exit 1 + fi + + if [ -z "$MULTIPATH_MODE" ] ; then + MULTIPATH_MODE=`awk "/^multipath /{print \\$2; exit}" $CONFIG` + fi + + # Use first running component device if we're handling a dm-mpath device + if [ "$MULTIPATH_MODE" = "yes" ] ; then + # If udev didn't tell us the UUID via DM_NAME, check /dev/mapper + if [ -z "$DM_NAME" ] ; then + DM_NAME=`ls -l --full-time /dev/mapper | + awk "/\/$DEV$/{print \\$9}"` + fi + + # For raw disks udev exports DEVTYPE=partition when + # handling partitions, and the rules can be written to + # take advantage of this to append a -part suffix. For + # dm devices we get DEVTYPE=disk even for partitions so + # we have to append the -part suffix directly in the + # helper. + if [ "$DEVTYPE" != "partition" ] ; then + PART=`echo $DM_NAME | awk -Fp '/p/{print "-part"$2}'` + fi + + # Strip off partition information. + DM_NAME=`echo $DM_NAME | sed 's/p[0-9][0-9]*$//'` + if [ -z "$DM_NAME" ] ; then + return + fi + + # Get the raw scsi device name from multipath -l. + DEV=`multipath -l $DM_NAME |awk '/running/{print $3 ; exit}'` + if [ -z "$DEV" ] ; then + return + fi + fi + + if echo $DEV | grep -q ^/devices/ ; then + sys_path=$DEV + else + sys_path=`udevadm info -q path -p /sys/block/$DEV 2>/dev/null` + fi + + # Use positional parameters as an ad-hoc array + set -- $(echo "$sys_path" | tr / ' ') + num_dirs=$# + scsi_host_dir="/sys" + + # Get path up to /sys/.../hostX + i=1 + while [ $i -le $num_dirs ] ; do + d=$(eval echo \${$i}) + scsi_host_dir="$scsi_host_dir/$d" + echo $d | grep -q -E '^host[0-9]+$' && break + i=$(($i + 1)) + done + + if [ $i = $num_dirs ] ; then + return + fi + + PCI_ID=$(eval echo \${$(($i -1))} | awk -F: '{print $2":"$3}') + + # In sas_switch mode, the directory four levels beneath + # /sys/.../hostX contains symlinks to phy devices that reveal + # the switch port number. In sas_direct mode, the phy links one + # directory down reveal the HBA port. + port_dir=$scsi_host_dir + case $TOPOLOGY in + "sas_switch") j=$(($i + 4)) ;; + "sas_direct") j=$(($i + 1)) ;; + esac + + i=$(($i + 1)) + while [ $i -le $j ] ; do + port_dir="$port_dir/$(eval echo \${$i})" + i=$(($i + 1)) + done + + PHY=`ls -d $port_dir/phy* 2>/dev/null | head -1 | awk -F: '{print $NF}'` + if [ -z "$PHY" ] ; then + return + fi + PORT=$(( $PHY / $PHYS_PER_PORT )) + + # Look in /sys/.../sas_device/end_device-X for the bay_identifier + # attribute. + end_device_dir=$port_dir + while [ $i -lt $num_dirs ] ; do + d=$(eval echo \${$i}) + end_device_dir="$end_device_dir/$d" + if echo $d | grep -q '^end_device' ; then + end_device_dir="$end_device_dir/sas_device/$d" + break + fi + i=$(($i + 1)) + done + + SLOT=`cat $end_device_dir/bay_identifier 2>/dev/null` + if [ -z "$SLOT" ] ; then + return + fi + + SLOT=`map_slot $SLOT` + CHAN=`map_channel $PCI_ID $PORT` + if [ -z "$CHAN" ] ; then + return + fi + echo ${CHAN}${SLOT}${PART} +} + +alias_handler () { + # Special handling is needed to correctly append a -part suffix + # to partitions of device mapper devices. The DEVTYPE attribute + # is normally set to "disk" instead of "partition" in this case, + # so the udev rules won't handle that for us as they do for + # "plain" block devices. + # + # For example, we may have the following links for a device and its + # partitions, + # + # /dev/disk/by-id/dm-name-isw_dibgbfcije_ARRAY0 -> ../../dm-0 + # /dev/disk/by-id/dm-name-isw_dibgbfcije_ARRAY0p1 -> ../../dm-1 + # /dev/disk/by-id/dm-name-isw_dibgbfcije_ARRAY0p2 -> ../../dm-3 + # + # and the following alias in vdev_id.conf. + # + # alias A0 dm-name-isw_dibgbfcije_ARRAY0 + # + # The desired outcome is for the following links to be created + # without having explicitly defined aliases for the partitions. + # + # /dev/disk/by-vdev/A0 -> ../../dm-0 + # /dev/disk/by-vdev/A0-part1 -> ../../dm-1 + # /dev/disk/by-vdev/A0-part2 -> ../../dm-3 + # + # Warning: The following grep pattern will misidentify whole-disk + # devices whose names end with 'p' followed by a string of + # digits as partitions, causing alias creation to fail. This + # ambiguity seems unavoidable, so devices using this facility + # must not use such names. + local DM_PART= + if echo $DM_NAME | grep -q -E 'p[0-9][0-9]*$' ; then + if [ "$DEVTYPE" != "partition" ] ; then + DM_PART=`echo $DM_NAME | awk -Fp '/p/{print "-part"$2}'` + fi + fi + + # DEVLINKS attribute must have been populated by already-run udev rules. + for link in $DEVLINKS ; do + # Remove partition information to match key of top-level device. + if [ -n "$DM_PART" ] ; then + link=`echo $link | sed 's/p[0-9][0-9]*$//'` + fi + # Check both the fully qualified and the base name of link. + for l in $link `basename $link` ; do + alias=`awk "/^alias / && \\$3 == \"${l}\" \ + { print \\$2; exit }" $CONFIG` + if [ -n "$alias" ] ; then + echo ${alias}${DM_PART} + return + fi + done + done +} + +while getopts 'c:d:g:mp:h' OPTION; do case ${OPTION} in c) - CONFIG=`readlink -e ${OPTARG}` - ;; + CONFIG=${OPTARG} + ;; d) - DEV=${OPTARG} - ;; + DEV=${OPTARG} + ;; g) TOPOLOGY=$OPTARG ;; @@ -145,13 +330,6 @@ while getopts 'c:s:d:g:mp:h' OPTION; do m) MULTIPATH_MODE=yes ;; - s) - SLOT_MAP=`readlink -e ${OPTARG}` - if [ ! -r $SLOT_MAP ] ; then - echo "Error: $SLOT_MAP is nonexistant or unreadable" - exit 1 - fi - ;; h) usage ;; @@ -170,129 +348,24 @@ fi if [ -z "$TOPOLOGY" ] ; then TOPOLOGY=`awk "/^topology /{print \\$2; exit}" $CONFIG` fi -TOPOLOGY=${TOPOLOGY:-sas_direct} -case $TOPOLOGY in - sas_direct|sas_switch) - ;; - *) - echo "Error: unknown topology $TOPOLOGY" - exit 1 - ;; -esac - -if [ -z "$PHYS_PER_PORT" ] ; then - PHYS_PER_PORT=`awk "/^phys_per_port /{print \\$2; exit}" $CONFIG` -fi -PHYS_PER_PORT=${PHYS_PER_PORT:-4} -if ! echo $PHYS_PER_PORT | grep -q -E '^[0-9]+$' ; then - echo "Error: phys_per_port value $PHYS_PER_PORT is non-numeric" - exit 1 -fi - -if [ -z "$MULTIPATH_MODE" ] ; then - MULTIPATH_MODE=`awk "/^multipath /{print \\$2; exit}" $CONFIG` -fi - -# Use first running component device if we're handling a dm-mpath device. -if [ "$MULTIPATH_MODE" = "yes" ] ; then - # If udev didn't tell us the UUID via DM_NAME, find it in /dev/mapper - if [ -z "$DM_NAME" ] ; then - DM_NAME=`ls -l --full-time /dev/mapper | - awk "/\/$DEV$/{print \\$9}"` - fi - - # For raw disks udev exports DEVTYPE=partition when handling partitions, - # and the rules can be written to take advantage of this to append a - # -part suffix. For dm devices we get DEVTYPE=disk even for partitions - # so we have to append the -part suffix directly in the helper. - if [ "$DEVTYPE" != "partition" ] ; then - PART=`echo $DM_NAME | awk -Fp '/p/{print "-part"$2}'` - fi - - # Strip off partition information. - DM_NAME=`echo $DM_NAME | sed 's/p[0-9][0-9]*$//'` - if [ -z "$DM_NAME" ] ; then - exit 0 - fi - - # Get the raw scsi device name from multipath -l. - DEV=`multipath -l $DM_NAME |awk '/running/{print $3 ; exit}'` - if [ -z "$DEV" ] ; then - exit 0 - fi -fi - -if echo $DEV | grep -q ^/devices/ ; then - sys_path=$DEV -else - sys_path=`udevadm info -q path -p /sys/block/$DEV 2>/dev/null` -fi - -# Use positional parameters as an ad-hoc array -set -- $(echo "$sys_path" | tr / ' ') -num_dirs=$# -scsi_host_dir="/sys" - -# Get path up to /sys/.../hostX -i=1 -while [ $i -le $num_dirs ] ; do - d=$(eval echo \${$i}) - scsi_host_dir="$scsi_host_dir/$d" - echo $d | grep -q -E '^host[0-9]+$' && break - i=$(($i + 1)) -done - -if [ $i = $num_dirs ] ; then - exit 0 -fi - -PCI_ID=$(eval echo \${$(($i -1))} | awk -F: '{print $2":"$3}') - -# In sas_switch mode, the directory four levels beneath /sys/.../hostX -# contains symlinks to phy devices that reveal the switch port number. In -# sas_direct mode, the phy links one directory down reveal the HBA port. -port_dir=$scsi_host_dir -case $TOPOLOGY in - "sas_switch") j=$(($i + 4)) ;; - "sas_direct") j=$(($i + 1)) ;; -esac -i=$(($i + 1)) -while [ $i -le $j ] ; do - port_dir="$port_dir/$(eval echo \${$i})" - i=$(($i + 1)) -done +# First check if an alias was defined for this device. +ID_VDEV=`alias_handler` -PHY=`ls -d $port_dir/phy* 2>/dev/null | head -1 | awk -F: '{print $NF}'` -if [ -z "$PHY" ] ; then - exit 0 -fi -PORT=$(( $PHY / $PHYS_PER_PORT )) - -# Look in /sys/.../sas_device/end_device-X for the bay_identifier -# attribute. -end_device_dir=$port_dir -while [ $i -lt $num_dirs ] ; do - d=$(eval echo \${$i}) - end_device_dir="$end_device_dir/$d" - if echo $d | grep -q '^end_device' ; then - end_device_dir="$end_device_dir/sas_device/$d" - break - fi - i=$(($i + 1)) -done - -SLOT=`cat $end_device_dir/bay_identifier 2>/dev/null` -if [ -z "$SLOT" ] ; then - exit 0 +if [ -z "$ID_VDEV" ] ; then + TOPOLOGY=${TOPOLOGY:-sas_direct} + case $TOPOLOGY in + sas_direct|sas_switch) + ID_VDEV=`sas_handler` + ;; + *) + echo "Error: unknown topology $TOPOLOGY" + exit 1 + ;; + esac fi -SLOT=`map_slot $SLOT` -CHAN=`map_channel $PCI_ID $PORT` -if [ -z "$CHAN" ] ; then - exit 0 +if [ -n "$ID_VDEV" ] ; then + echo "ID_VDEV=${ID_VDEV}" + echo "ID_VDEV_PATH=disk/by-vdev/${ID_VDEV}" fi -ID_VDEV=${CHAN}${SLOT}${PART} - -echo "ID_VDEV=${ID_VDEV}" -echo "ID_VDEV_PATH=disk/by-vdev/${ID_VDEV}" |