[PATCH] xfstests: overlay: Do not lose security.capability xattr over metadata only file copy-up

[Vivek Goyal <vgoyal@redhat.com>]

Extend test 064 to check security.capability xattr is not lost over copy-up
of a metadata only file. This requires mounting overlay with option
metacopy=on and first trigger metadata only copy-up and then trigger
data copy-up.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
---
 tests/overlay/064     |   18 ++++++++++++++++++
 tests/overlay/064.out |    1 +
 2 files changed, 19 insertions(+)

Index: xfstests-dev/tests/overlay/064
===================================================================
--- xfstests-dev.orig/tests/overlay/064	2019-01-28 15:03:12.590434802 -0500
+++ xfstests-dev/tests/overlay/064	2019-01-30 11:18:29.595591985 -0500
@@ -55,6 +55,24 @@ $XFS_IO_PROG -c "stat" ${SCRATCH_MNT}/fi
 # Make sure cap_setuid is still there
 $GETCAP_PROG ${SCRATCH_MNT}/file | _filter_scratch
 
+# Test copy-up with metacopy on.
+$UMOUNT_PROG $SCRATCH_MNT
+_scratch_mkfs
+echo "This is lower" >> ${lowerdir}/file
+
+# Set CAP_SETUID
+$SETCAP_PROG cap_setuid+ep ${lowerdir}/file
+_scratch_mount "-o metacopy=on"
+
+# Trigger metadata only copy-up
+chmod 000 ${SCRATCH_MNT}/file
+
+# Trigger data copy-up
+$XFS_IO_PROG -c "stat" ${SCRATCH_MNT}/file >>$seqres.full
+
+# Make sure cap_setuid is still there
+$GETCAP_PROG ${SCRATCH_MNT}/file | _filter_scratch
+
 # success, all done
 status=0
 exit
Index: xfstests-dev/tests/overlay/064.out
===================================================================
--- xfstests-dev.orig/tests/overlay/064.out	2019-01-28 15:03:12.590434802 -0500
+++ xfstests-dev/tests/overlay/064.out	2019-01-30 11:21:11.745591985 -0500
@@ -1,2 +1,3 @@
 QA output created by 064
 SCRATCH_MNT/file = cap_setuid+ep
+SCRATCH_MNT/file = cap_setuid+ep