From patchwork Thu Jun 6 15:51:52 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Biggers X-Patchwork-Id: 10979959 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0D5986C5 for ; Thu, 6 Jun 2019 15:54:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EE2792874C for ; Thu, 6 Jun 2019 15:54:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E2A2628922; Thu, 6 Jun 2019 15:54:40 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8A34C285EB for ; Thu, 6 Jun 2019 15:54:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729191AbfFFPyh (ORCPT ); Thu, 6 Jun 2019 11:54:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:59416 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729156AbfFFPyG (ORCPT ); Thu, 6 Jun 2019 11:54:06 -0400 Received: from sol.localdomain (c-24-5-143-220.hsd1.ca.comcast.net [24.5.143.220]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3AF8020872; Thu, 6 Jun 2019 15:54:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559836444; bh=QoVlW6FRaHiVvUh0XE5dIgyIszpbGCBqsGS91FVP/dk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fUj3R74HWPHstTbkT/je98jpLeiYEenQLgK5mxvZtrx8aRpJ7zJGYY+ahBoF2DgZx lSOeRF+XEn6Zg1PaZm0jQuW1cL1GfiZFB0t+wVQHZee6uRWftqGHVmkQBGO+6CA0m0 JROogS9j2ApQOeTwpbj039cyk0cvmgvkgMojg7c0= From: Eric Biggers To: linux-fscrypt@vger.kernel.org Cc: linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org, linux-integrity@vger.kernel.org, Jaegeuk Kim , "Theodore Y . Ts'o" , Victor Hsieh , Dave Chinner , Christoph Hellwig , "Darrick J . Wong" , Linus Torvalds Subject: [PATCH v4 03/16] fs-verity: add UAPI header Date: Thu, 6 Jun 2019 08:51:52 -0700 Message-Id: <20190606155205.2872-4-ebiggers@kernel.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190606155205.2872-1-ebiggers@kernel.org> References: <20190606155205.2872-1-ebiggers@kernel.org> MIME-Version: 1.0 Sender: linux-integrity-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Eric Biggers Add the UAPI header for fs-verity, including two ioctls: - FS_IOC_ENABLE_VERITY - FS_IOC_MEASURE_VERITY These ioctls are documented in the "User API" section of Documentation/filesystems/fsverity.rst. Examples of using these ioctls can be found in fsverity-utils (https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/fsverity-utils.git). I've also written xfstests that test these ioctls (https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/xfstests-dev.git/log/?h=fsverity). Signed-off-by: Eric Biggers --- Documentation/ioctl/ioctl-number.txt | 1 + include/uapi/linux/fsverity.h | 39 ++++++++++++++++++++++++++++ 2 files changed, 40 insertions(+) create mode 100644 include/uapi/linux/fsverity.h diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt index c9558146ac58..21767c81e86d 100644 --- a/Documentation/ioctl/ioctl-number.txt +++ b/Documentation/ioctl/ioctl-number.txt @@ -225,6 +225,7 @@ Code Seq#(hex) Include File Comments 'f' 00-0F fs/ext4/ext4.h conflict! 'f' 00-0F linux/fs.h conflict! 'f' 00-0F fs/ocfs2/ocfs2_fs.h conflict! +'f' 81-8F linux/fsverity.h 'g' 00-0F linux/usb/gadgetfs.h 'g' 20-2F linux/usb/g_printer.h 'h' 00-7F conflict! Charon filesystem diff --git a/include/uapi/linux/fsverity.h b/include/uapi/linux/fsverity.h new file mode 100644 index 000000000000..57d1d7fc0c34 --- /dev/null +++ b/include/uapi/linux/fsverity.h @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * fs-verity user API + * + * These ioctls can be used on filesystems that support fs-verity. See the + * "User API" section of Documentation/filesystems/fsverity.rst. + * + * Copyright 2019 Google LLC + */ +#ifndef _UAPI_LINUX_FSVERITY_H +#define _UAPI_LINUX_FSVERITY_H + +#include +#include + +#define FS_VERITY_HASH_ALG_SHA256 1 + +struct fsverity_enable_arg { + __u32 version; + __u32 hash_algorithm; + __u32 block_size; + __u32 salt_size; + __u64 salt_ptr; + __u32 sig_size; + __u32 __reserved1; + __u64 sig_ptr; + __u64 __reserved2[11]; +}; + +struct fsverity_digest { + __u16 digest_algorithm; + __u16 digest_size; /* input/output */ + __u8 digest[]; +}; + +#define FS_IOC_ENABLE_VERITY _IOW('f', 133, struct fsverity_enable_arg) +#define FS_IOC_MEASURE_VERITY _IOWR('f', 134, struct fsverity_digest) + +#endif /* _UAPI_LINUX_FSVERITY_H */