Overlayfs should only filter out xattr starting with
"trusted.overlay.", not "trusted.overlay".
Setting xattrs like "trusted.overlay.xxx" is not allowed.
Setting xattrs like "trusted.overlayxxx" is allowed.
v4.8-rc1 introduced a regression that we can't set xattrs
like "trusted.overlayxxx". Kernel commit below fixed it
in v4.8:
fe2b75952347 ovl: Fix OVL_XATTR_PREFIX
This case tests both get/set of these 2 kinds of xattrs.
Pattern "trusted.overlay.xxx" should fail, however the
errno returned by set/get varies among kernel versions.
Pattern "trusted.overlayxxx" shold always work.
CC: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Xiong Zhou <xzhou@redhat.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
Xiong Zhou