bcachefs-tools/checks/nested.sh

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#!/usr/bin/env bash
set -euxo pipefail
blkdev="/dev/vdb"
mnt1=$(mktemp -d)
mnt2=$(mktemp -d)
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 \
"$blkdev"
udevadm settle
echo "$pw" | bcachefs mount -v "UUID=$uuid" "$mnt1"
fallocate --length 2G "$mnt1/fs.img"
bcachefs format \
--verbose \
"$mnt1/fs.img"
loopdev=$(losetup --find --show "$mnt1/fs.img")
udevadm settle
mount "$loopdev" "$mnt2"
f3write "$mnt1"
f3write "$mnt2"
f3read "$mnt1"
f3read "$mnt2"