075

075.sh

# Since Linux v5.10, chattr on directories in overlayfs is now supported,
# however the code shipped in Linux v5.10 has some bug that lead to hung
# task.
#
# This test tries to detect whether the affected operation will succeed.
#
seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

here=`pwd`
tmp=/tmp/$$
status=1        # failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
        cd /
        $CHATTR_PROG -i $lowerdir/foo > /dev/null 2>&1
        $CHATTR_PROG -i $upperdir/foo > /dev/null 2>&1
        rm -f $tmp.*
}

# get standard environment, filters and checks
. ./common/rc
. ./common/filter

# remove previous $seqres.full before test
rm -f $seqres.full

# real QA test starts here
_supported_fs overlay
_require_scratch
_require_chattr i

# remove all files from previous runs
_scratch_mkfs

# prepare lower test file
lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
upperdir=$OVL_BASE_SCRATCH_MNT/$OVL_UPPER
workdir=$OVL_BASE_SCRATCH_MNT/$OVL_WORK
mkdir -p $lowerdir
mkdir $lowerdir/foo

# mounting overlay
_scratch_mount

# Try to add immutable attributes in overlay, it will
# invoke ioctl() on the directory, which will hang
# on unpatched Linux v5.10, and just fail on previous kernels.
$CHATTR_PROG +i $SCRATCH_MNT/foo > /dev/null 2>&1

$UMOUNT_PROG $SCRATCH_MNT

# success, all done
echo "Silence is golden"
status=0
exit