#!/usr/bin/env bash
set -euxo pipefail

blkdev="/dev/vdb"
mnt="/tmp/mnt"
pw=$(genpass)
uuid=$(uuidgen)

# link user and session keyrings so that the key can be found by the kernel
keyctl link @u @s

echo "$pw" | bcachefs format \
    --verbose \
    --encrypted \
    --uuid "$uuid" \
    --fs_label test-fs \
    "$blkdev"

udevadm settle

mkdir -p "$mnt"

bcachefs unlock -c "$blkdev"

echo "$pw" | bcachefs unlock "$blkdev"
key_id=$(keyctl search @u user "bcachefs:$uuid")

bcachefs mount -v "$blkdev" "$mnt"
umount "$mnt"

keyctl unlink "$key_id"

echo "$pw" | bcachefs unlock -k session "$blkdev"
key_id=$(keyctl search @s user "bcachefs:$uuid")

mount -t bcachefs "$blkdev" "$mnt"
umount "$mnt"

keyctl unlink "$key_id"