ec2_ephemeral_diskseen

#!/bin/sh

# REQUIRE: FILESYSTEMS
# PROVIDE: ec2_ephemeral_diskseen
# KEYWORD: shutdown

# This script is *on by default* because it's essential to collect a list
# of ephemeral disks at boot time for reference the next time the system
# boots -- otherwise if the system administrator enables ec2_ephemeralswap
# and reboots, any data stored on the ephemeral disks may be lost.
# DISABLE THIS AT YOUR OWN RISK!

: ${ec2_ephemeral_diskseen_enable=YES}

. /etc/rc.subr

name="ec2_ephemeral_diskseen"
rcvar=ec2_ephemeral_diskseen_enable
start_cmd="ec2_ephemeral_diskseen_run"
stop_cmd=":"

EBSNVMEID=/usr/local/sbin/ebsnvme-id

ec2_ephemeral_diskseen_run()
{

	# We could use the /dev/aws/disk/* tree, but that's generated by
	# dev_aws_disk which might be turned off.  Instead, check out all
	# the disks by running ebsnvme-id ourselves.
	: > /var/db/ec2_ephemeral_diskseen
	for DISK in `ls /dev/nda* /dev/nvd*`; do
		if [ -L $DISK ]; then
			continue
		fi
		case `${EBSNVMEID} -m $DISK 2>/dev/null` in
		"Amazon EC2 NVMe Instance Storage")
			${EBSNVMEID} -s $DISK >> /var/db/ec2_ephemeral_diskseen
			;;
		esac		
	done
}

load_rc_config $name
run_rc_command "$1"