bcachefs: test_casefold_overlayfs

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 35 insertions, 0 deletions

diff --git a/tests/fs/bcachefs/single_device.ktest b/tests/fs/bcachefs/single_device.ktest
index 975d621..5a57e59 100755
--- a/tests/fs/bcachefs/single_device.ktest
+++ b/tests/fs/bcachefs/single_device.ktest
@@ -1930,4 +1930,39 @@ test_single_device()
     umount /mnt
 }
 
+require-kernel-config OVERLAY_FS
+
+test_casefold_overlayfs()
+{
+    run_quiet "" bcachefs format -f ${ktest_scratch_dev[0]}
+    mount ${ktest_scratch_dev[0]} /mnt
+
+    mkdir -p /mnt/dir/casefold
+    bcachefs set-file-option --casefold /mnt/dir/casefold
+
+    echo foo > /mnt/dir/casefold/foo
+    cat /mnt/dir/casefold/FOO
+
+    mkdir /mnt/lower
+    mkdir /mnt/upper
+    mkdir /mnt/work
+    mkdir /mnt/merged
+
+    echo "Testing an overlayfs on a casefold fs with non-casefolded dirs"
+    mount -t overlay -o lowerdir=/mnt/lower,upperdir=/mnt/upper,workdir=/mnt/work overlay /mnt/merged
+    umount /mnt/merged
+
+    echo "Test using casefolded dir - should fail"
+    ! mount -t overlay -o lowerdir=/mnt/lower,upperdir=/mnt/upper,workdir=/mnt/work overlay /mnt/merged
+    ! mount -t overlay -o lowerdir=/mnt/casefold,upperdir=/mnt/casefold,workdir=/mnt/work overlay /mnt/merged
+
+    echo "Test using a dir with a casefold subdir - should mount"
+    mount -t overlay -o lowerdir=/mnt/dir,upperdir=/mnt/upper,workdir=/mnt/work overlay /mnt/merged
+    ! ls /mnt/merged/dir/casefold
+    umount /mnt/merged
+
+    umount /mnt
+    bcachefs fsck -ny ${ktest_scratch_dev[0]}
+}
+
 main "$@"