-c specify name of alernate config file [default=$CONFIG]
-d specify basename of device (i.e. sda)
+ -e Create enclose device symlinks only (/dev/by-enclosure)
-g Storage network topology [default="$TOPOLOGY"]
-m Run in multipath mode
-p number of phy's per switch port [default=$PHYS_PER_PORT]
echo ${CHAN}${SLOT}${PART}
}
+# Figure out the name for the enclosure symlink
+enclosure_handler () {
+ # We get all the info we need from udev's DEVPATH variable:
+ #
+ # DEVPATH=/sys/devices/pci0000:00/0000:00:03.0/0000:05:00.0/host0/subsystem/devices/0:0:0:0/scsi_generic/sg0
+
+ # Get the enclosure ID ("0:0:0:0")
+ ENC=$(basename $(readlink -m "/sys/$DEVPATH/../.."))
+ if [ ! -d /sys/class/enclosure/$ENC ] ; then
+ # Not an enclosure, bail out
+ return
+ fi
+
+ # Get the long sysfs device path to our enclosure. Looks like:
+ # /devices/pci0000:00/0000:00:03.0/0000:05:00.0/host0/port-0:0/ ... /enclosure/0:0:0:0
+
+ ENC_DEVICE=$(readlink /sys/class/enclosure/$ENC)
+
+ # Grab the full path to the hosts port dir:
+ # /devices/pci0000:00/0000:00:03.0/0000:05:00.0/host0/port-0:0
+ PORT_DIR=$(echo $ENC_DEVICE | grep -Eo '.+host[0-9]+/port-[0-9]+:[0-9]+')
+
+ # Get the port number
+ PORT_ID=$(echo $PORT_DIR | grep -Eo "[0-9]+$")
+
+ # The PCI directory is two directories up from the port directory
+ # /sys/devices/pci0000:00/0000:00:03.0/0000:05:00.0
+ PCI_ID_LONG=$(basename $(readlink -m "/sys/$PORT_DIR/../.."))
+
+ # Strip down the PCI address from 0000:05:00.0 to 05:00.0
+ PCI_ID=$(echo "$PCI_ID_LONG" | sed -r 's/^[0-9]+://g')
+
+ # Name our device according to vdev_id.conf (like "L0" or "U1").
+ NAME=$(awk "/channel/{if (\$1 == \"channel\" && \$2 == \"$PCI_ID\" && \
+ \$3 == \"$PORT_ID\") {print \$4int(count[\$4])}; count[\$4]++}" $CONFIG)
+
+ echo "${NAME}"
+}
+
alias_handler () {
# Special handling is needed to correctly append a -part suffix
# to partitions of device mapper devices. The DEVTYPE attribute
done
}
-while getopts 'c:d:g:mp:h' OPTION; do
+while getopts 'c:d:eg:mp:h' OPTION; do
case ${OPTION} in
c)
CONFIG=${OPTARG}
d)
DEV=${OPTARG}
;;
+ e)
+ # When udev sees a scsi_generic device, it calls this script with -e to
+ # create the enclosure device symlinks only. We also need
+ # "enclosure_symlinks yes" set in vdev_id.config to actually create the
+ # symlink.
+ ENCLOSURE_MODE=$(awk '{if ($1 == "enclosure_symlinks") print $2}' $CONFIG)
+ if [ "$ENCLOSURE_MODE" != "yes" ] ; then
+ exit 0
+ fi
+ ;;
g)
TOPOLOGY=$OPTARG
;;
exit 0
fi
-if [ -z "$DEV" ] ; then
+if [ -z "$DEV" -a -z "$ENCLOSURE_MODE" ] ; then
echo "Error: missing required option -d"
exit 1
fi
BAY=`awk "\\$1 == \"slot\" {print \\$2; exit}" $CONFIG`
fi
+TOPOLOGY=${TOPOLOGY:-sas_direct}
+
+# Should we create /dev/by-enclosure symlinks?
+if [ "$ENCLOSURE_MODE" = "yes" -a "$TOPOLOGY" = "sas_direct" ] ; then
+ ID_ENCLOSURE=$(enclosure_handler)
+ if [ -z "$ID_ENCLOSURE" ] ; then
+ exit 0
+ fi
+
+ # Just create the symlinks to the enclosure devices and then exit.
+ ENCLOSURE_PREFIX=$(awk '/enclosure_symlinks_prefix/{print $2}' $CONFIG)
+ if [ -z "$ENCLOSURE_PREFIX" ] ; then
+ ENCLOSURE_PREFIX="enc"
+ fi
+ echo "ID_ENCLOSURE=$ID_ENCLOSURE"
+ echo "ID_ENCLOSURE_PATH=by-enclosure/$ENCLOSURE_PREFIX-$ID_ENCLOSURE"
+ exit 0
+fi
+
# First check if an alias was defined for this device.
ID_VDEV=`alias_handler`
if [ -z "$ID_VDEV" ] ; then
BAY=${BAY:-bay}
- TOPOLOGY=${TOPOLOGY:-sas_direct}
case $TOPOLOGY in
sas_direct|sas_switch)
ID_VDEV=`sas_handler`
Maps a physical path to a channel name (typically representing a single
disk enclosure).
+.TP
+\fIenclosure_symlinks\fR <yes|no>
+Additionally create /dev/by-enclosure symlinks to the disk enclosure
+sg devices using the naming scheme from from vdev_id.conf.
+\fIenclosure_symlinks\fR is only allowed for sas_direct mode.
+.TP
+\fIenclosure_symlinks_prefix\fR <prefix>
+Specify the prefix for the enclosure symlinks in the form of:
+
+/dev/by-enclosure/<prefix>-<channel><num>
+
+Defaults to "enc" if not specified.
+.TP
\fIpci_slot\fR - specifies the PCI SLOT of the HBA
hosting the disk enclosure being mapped, as found in the output of
.BR lspci (8).
channel 86:00.0 0 B
.fi
.P
+A configuration with enclosure_symlinks enabled.
+.P
+.nf
+ multipath yes
+ enclosure_symlinks yes
+
+ # PCI_ID HBA PORT CHANNEL NAME
+ channel 05:00.0 1 U
+ channel 05:00.0 0 L
+ channel 06:00.0 1 U
+ channel 06:00.0 0 L
+.fi
+In addition to the disks symlinks, this configuration will create:
+.P
+.nf
+ /dev/by-enclosure/enc-L0
+ /dev/by-enclosure/enc-L1
+ /dev/by-enclosure/enc-U0
+ /dev/by-enclosure/enc-U1
+.fi
+.P
A configuration using device link aliases.
.P
.nf
KERNEL=="*[!0-9]", ENV{SUBSYSTEM}=="block", ENV{ID_VDEV}=="?*", SYMLINK+="$env{ID_VDEV_PATH}"
KERNEL=="*[0-9]", ENV{SUBSYSTEM}=="block", ENV{DEVTYPE}=="partition", ENV{ID_VDEV}=="?*", SYMLINK+="$env{ID_VDEV_PATH}-part%n"
KERNEL=="dm-[0-9]*", ENV{SUBSYSTEM}=="block", ENV{ID_VDEV}=="?*", SYMLINK+="$env{ID_VDEV_PATH}"
+
+# Enclosure device symlink rules
+ENV{SUBSYSTEM}=="scsi_generic", IMPORT{program}="@udevdir@/vdev_id -e"
+ENV{SUBSYSTEM}=="scsi_generic", ENV{ID_ENCLOSURE}=="?*", SYMLINK+="$env{ID_ENCLOSURE_PATH}"
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