dev_aws_disk

#!/bin/sh

# PROVIDE: dev_aws_disk
# REQUIRE: FILESYSTEMS
# BEFORE:  devd
#
# Add the following lines to /etc/rc.conf.local or /etc/rc.conf
# to enable dev_aws_disk:
#
# dev_aws_disk_enable:	Set to YES to enable dev_aws_disk.
#
# Note that this script is invoked by a devd rule, but if the script is
# not enabled via rc.conf the devd rule will have no effect.

. /etc/rc.subr

name="dev_aws_disk"
rcvar=${name}_enable
: ${dev_aws_disk_enable=NO}
start_cmd="dev_aws_disk_start"
stop_cmd="dev_aws_disk_stop"

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

start_ebs() {
	volid=`${EBSNVMEID} -v $1 | cut -f 2 -d :`

	ln -sf /dev/$1 /var/run/devaws/disk/linuxname/`${EBSNVMEID} -b $1`
	ln -sf /dev/$1 /var/run/devaws/disk/ebs/`echo $volid`
}

start_eph() {

	ln -sf /dev/$1 /var/run/devaws/disk/ephemeral/`${EBSNVMEID} -s $1`
}

dev_aws_disk_start() {

	if [ -z "$1" ]; then
		# Starting at boot before devd kicks in; we need to set
		# up the /dev/aws symlink and the /var/run/devaws tree.
		ln -shf /var/run/devaws /dev/aws
		mkdir -p /var/run/devaws

		# Get rid of anything left over from a previous boot.
		rm -rf /var/run/devaws/disk

		# Create the trees we'll drop symlinks into.
		mkdir /var/run/devaws/disk
		mkdir /var/run/devaws/disk/ebs
		mkdir /var/run/devaws/disk/linuxname
		mkdir /var/run/devaws/disk/ephemeral
	else
		# Only handle devices, not nvd->nda symlinks
		if [ -L /dev/$1 ]; then
			return
		fi
		case `${EBSNVMEID} -m $1` in
		"Amazon Elastic Block Store") start_ebs $1 ;;
		"Amazon EC2 NVMe Instance Storage") start_eph $1 ;;
		esac
	fi
}

dev_aws_disk_stop()
{

	if ! [ -z "$1" ]; then
		# Delete symlinks to the device in question
		for S in /var/run/devaws/disk/*/*; do
			case `readlink $S` in
			"/dev/$1") rm $S ;;
			esac
		done
	fi
}

load_rc_config $name
run_rc_command $*