From patchwork Fri Jul 15 03:04:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 12918697 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 48011C433EF for ; Fri, 15 Jul 2022 03:05:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241254AbiGODF3 (ORCPT ); Thu, 14 Jul 2022 23:05:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34046 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241315AbiGODE6 (ORCPT ); Thu, 14 Jul 2022 23:04:58 -0400 Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 995557696C; Thu, 14 Jul 2022 20:04:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1657854296; x=1689390296; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=U3saHsgvYciwhLfxacVmiu3qWDreQ9A9gfZULUZztoM=; b=mtUTpuyWbAaOl88KAeVBPPJJOEAuy5YZFdU/+8WEEG1M/HsOxtCrdsuW IFFSqZTK5MRxNhBcTfOfOpQPh7Ii7LgTiS4nKv74a6f0gG52v7dykWKOD 17NpB+0fd8f7t/69V82c+DPRfjKYTIYFZMOhmMK/iS249+lJK/9mNZ4dB cpf/98ZSXNqe8FayuKMjQK8SQy1gwgTrhYFQNShPH3PXYK8Z1yOO8/9IB nmHtyPwAIIbAPf2D+ewruE7JVpsdSigG6hsY3AH0bkG4xP6egv0KvViEO 0fIVBQMLF93ElDcwFZfvTPky5a/SBt3wagGYkbx2fFVPbhT9EKNbyBsNJ g==; X-IronPort-AV: E=McAfee;i="6400,9594,10408"; a="372003645" X-IronPort-AV: E=Sophos;i="5.92,272,1650956400"; d="scan'208";a="372003645" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jul 2022 20:04:54 -0700 X-IronPort-AV: E=Sophos;i="5.92,272,1650956400"; d="scan'208";a="623678661" Received: from mbordone-mobl.amr.corp.intel.com (HELO localhost) ([10.255.5.217]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jul 2022 20:04:51 -0700 From: ira.weiny@intel.com To: Dan Williams , Bjorn Helgaas , Jonathan Cameron Cc: Ira Weiny , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Greg Kroah-Hartman , Lukas Wunner , Alison Schofield , Vishal Verma , Dave Jiang , Ben Widawsky , linux-kernel@vger.kernel.org, linux-cxl@vger.kernel.org, linux-pci@vger.kernel.org Subject: [PATCH V14 5/7] driver-core: Introduce BIN_ATTR_ADMIN_{RO,RW} Date: Thu, 14 Jul 2022 20:04:22 -0700 Message-Id: <20220715030424.462963-6-ira.weiny@intel.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220715030424.462963-1-ira.weiny@intel.com> References: <20220715030424.462963-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org From: Ira Weiny Many binary attributes need to limit access to CAP_SYS_ADMIN only; ie many binary attributes specify is_visible with 0400 or 0600. Make setting the permissions of such attributes more explicit by defining BIN_ATTR_ADMIN_{RO,RW}. Cc: Bjorn Helgaas Suggested-by: Dan Williams Suggested-by: Krzysztof Wilczyński Reviewed-by: Greg Kroah-Hartman Signed-off-by: Ira Weiny Reviewed-by: Jonathan Cameron --- Changes from V12: Pick up review tag Bjorn: NOTE: this has a lot of similarities to https://lore.kernel.org/all/20210416205856.3234481-7-kw@linux.com/ I'm not sure why that patch was not picked up. But I've added Krzysztof as a suggested by if that is ok? Changes from V11: New Patch --- include/linux/sysfs.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index e3f1e8ac1f85..fd3fe5c8c17f 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -235,6 +235,22 @@ struct bin_attribute bin_attr_##_name = __BIN_ATTR_WO(_name, _size) #define BIN_ATTR_RW(_name, _size) \ struct bin_attribute bin_attr_##_name = __BIN_ATTR_RW(_name, _size) + +#define __BIN_ATTR_ADMIN_RO(_name, _size) { \ + .attr = { .name = __stringify(_name), .mode = 0400 }, \ + .read = _name##_read, \ + .size = _size, \ +} + +#define __BIN_ATTR_ADMIN_RW(_name, _size) \ + __BIN_ATTR(_name, 0600, _name##_read, _name##_write, _size) + +#define BIN_ATTR_ADMIN_RO(_name, _size) \ +struct bin_attribute bin_attr_##_name = __BIN_ATTR_ADMIN_RO(_name, _size) + +#define BIN_ATTR_ADMIN_RW(_name, _size) \ +struct bin_attribute bin_attr_##_name = __BIN_ATTR_ADMIN_RW(_name, _size) + struct sysfs_ops { ssize_t (*show)(struct kobject *, struct attribute *, char *); ssize_t (*store)(struct kobject *, struct attribute *, const char *, size_t);