319  * to return positive, while there's no actual upper alias for the inode.
320  * Copy up code needs to know about the existence of the upper alias, so it
514 	 * Check if copy-up has happened as well as for upper alias (in  in ovl_already_copied_up()
521 	 *      upper dentry is up-to-date  in ovl_already_copied_up()
523 	 *      upper parent i_rwsem to prevent reordering copy-up  in ovl_already_copied_up()
587 #define OVL_XATTR_UPPER_POSTFIX		"upper"
618 		pr_warn("cannot set %s xattr on upper\n", ovl_xattr(ofs, ox));  in ovl_check_setxattr()
635 	 * Do not fail when upper doesn't support xattrs.  in ovl_set_impure()
636 	 * Upper inodes won't have origin nor redirect xattr anyway.  in ovl_set_impure()
648 void ovl_check_protattr(struct inode *inode, struct dentry *upper)  in ovl_check_protattr()  argument
655 	res = ovl_do_getxattr(ofs, upper, OVL_XATTR_PROTATTR, buf,  in ovl_check_protattr()
661 	 * Initialize inode flags from overlay.protattr xattr and upper inode  in ovl_check_protattr()
662 	 * flags.  If upper inode has those fileattr flags set (i.e. from old  in ovl_check_protattr()
677 				    upper, res);  in ovl_check_protattr()
683 int ovl_set_protattr(struct inode *inode, struct dentry *upper,  in ovl_set_protattr()  argument
703 	 * Do not allow to set protection flags when upper doesn't support  in ovl_set_protattr()
704 	 * xattrs, because we do not set those fileattr flags on upper inode.  in ovl_set_protattr()
708 		err = ovl_check_setxattr(ofs, upper, OVL_XATTR_PROTATTR,  in ovl_set_protattr()
711 		err = ovl_do_removexattr(ofs, upper, OVL_XATTR_PROTATTR);  in ovl_set_protattr()
720 	/* Mask out the fileattr flags that should not be set in upper inode */  in ovl_set_protattr()
816 		 * overlay nlink to zero before all upper inodes are unlinked.  in ovl_cleanup_index()
855  * Operations that change overlay inode and upper inode nlink need to be
871 	 * first copy up, we have no upper index inode to store the xattr.  in ovl_nlink_start()
874 	 * copy up to create the upper index. Creating the upper index will  in ovl_nlink_start()
897 	 * upper operation succeeds, along with nlink change of upper inode.  in ovl_nlink_start()
899 	 * value relative to the upper inode nlink in an upper inode xattr.  in ovl_nlink_start()