btrfs-progs/tests/mkfs-tests/006-partitioned-loopdev/test.sh

#!/bin/bash
# recognize partitioned loop devices

source $TOP/tests/common

if ! losetup --help | grep -q 'partscan'; then
	_not_run "losetup --partscan not available"
	exit 0
fi

check_prereq mkfs.btrfs

setup_root_helper

run_check truncate -s0 img
chmod a+w img
cp partition-1g-1g img
run_check truncate -s2g img

loopdev=$(run_check_stdout $SUDO_HELPER losetup --partscan --find --show img)
base=$(basename $loopdev)

# expect partitions named like loop0p1 etc
for looppart in $(ls /dev/$base?*); do
	run_check $SUDO_HELPER $TOP/mkfs.btrfs -f $looppart
	run_check $SUDO_HELPER $TOP/btrfs inspect-internal dump-super $looppart
done

# cleanup
run_check $SUDO_HELPER losetup -d $loopdev
run_check truncate -s0 img
rm img