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#!/bin/sh
[ -x /usr/sbin/nvme ] || exit
PROC="$(basename $0)[$$]"
log() {
FACILITY="kern.$1"
shift
logger -s -p "$FACILITY" -t "$PROC" "$@"
}
raw_ebs_alias() {
/usr/sbin/nvme id-ctrl "/dev/$BASE" -b 2>/dev/null | dd bs=32 skip=96 count=1 2>/dev/null
}
case $ACTION in
add|"")
BASE=$(echo $MDEV | sed -re 's/^(nvme[0-9]+n[0-9]+).*/\1/')
PART=$(echo $MDEV | sed -re 's/nvme[0-9]+n[0-9]+p?//g')
MAXTRY=50
TRY=0
until [ -n "$EBS" ]; do
EBS=$(raw_ebs_alias | sed -nre '/^(\/dev\/)?(s|xv)d[a-z]{1,2} /p' | tr -d ' ')
[ -n "$EBS" ] && break
TRY=$((TRY + 1))
if [ $TRY -eq $MAXTRY ]; then
log err "Failed to get EBS volume alias for $MDEV after $MAXTRY attempts ($(raw_ebs_alias))"
exit 1
fi
sleep 0.1
done
EBS=${EBS#/dev/}$PART
ln -sf "$MDEV" "${EBS/xvd/sd}" && log notice "Added ${EBS/xvd/sd} symlink for $MDEV"
ln -sf "$MDEV" "${EBS/sd/xvd}" && log notice "Added ${EBS/sd/xvd} symlink for $MDEV"
;;
remove)
for TARGET in sd* xvd*
do
[ "$(readlink $TARGET 2>/dev/null)" = "$MDEV" ] && rm -f "$TARGET" && log notice "Removed $TARGET symlink for $MDEV"
done
;;
esac
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