From patchwork Sat Jan 18 12:07:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aleksa Sarai X-Patchwork-Id: 11340075 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 02FA41820 for ; Sat, 18 Jan 2020 12:08:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DF80924656 for ; Sat, 18 Jan 2020 12:08:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727143AbgARMIY (ORCPT ); Sat, 18 Jan 2020 07:08:24 -0500 Received: from mout-p-202.mailbox.org ([80.241.56.172]:8772 "EHLO mout-p-202.mailbox.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727118AbgARMIY (ORCPT ); Sat, 18 Jan 2020 07:08:24 -0500 Received: from smtp1.mailbox.org (smtp1.mailbox.org [IPv6:2001:67c:2050:105:465:1:1:0]) (using TLSv1.2 with cipher ECDHE-RSA-CHACHA20-POLY1305 (256/256 bits)) (No client certificate requested) by mout-p-202.mailbox.org (Postfix) with ESMTPS id 480Gsx0gfnzQlC0; Sat, 18 Jan 2020 13:08:21 +0100 (CET) X-Virus-Scanned: amavisd-new at heinlein-support.de Received: from smtp1.mailbox.org ([80.241.60.240]) by spamfilter02.heinlein-hosting.de (spamfilter02.heinlein-hosting.de [80.241.56.116]) (amavisd-new, port 10030) with ESMTP id nGUXfNiBnQgK; Sat, 18 Jan 2020 13:08:17 +0100 (CET) From: Aleksa Sarai To: Alexander Viro , Jeff Layton , "J. Bruce Fields" , Shuah Khan Cc: Aleksa Sarai , Florian Weimer , David Laight , Christian Brauner , quae@daurnimator.com, dev@opencontainers.org, containers@lists.linux-foundation.org, libc-alpha@sourceware.org, linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH v3 0/2] openat2: minor uapi cleanups Date: Sat, 18 Jan 2020 23:07:58 +1100 Message-Id: <20200118120800.16358-1-cyphar@cyphar.com> In-Reply-To: <20200115144831.GJ8904@ZenIV.linux.org.uk> References: <20200115144831.GJ8904@ZenIV.linux.org.uk> MIME-Version: 1.0 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Patch changelog: v3: * Merge changes into the original patches to make Al's life easier. [Al Viro] v2: * Add include to openat2.h. [Florian Weimer] * Move OPEN_HOW_SIZE_* constants out of UAPI. [Florian Weimer] * Switch from __aligned_u64 to __u64 since it isn't necessary. [David Laight] v1: While openat2(2) is still not yet in Linus's tree, we can take this opportunity to iron out some small warts that weren't noticed earlier: * A fix was suggested by Florian Weimer, to separate the openat2 definitions so glibc can use the header directly. I've put the maintainership under VFS but let me know if you'd prefer it belong ot the fcntl folks. * Having heterogenous field sizes in an extensible struct results in "padding hole" problems when adding new fields (in addition the correct error to use for non-zero padding isn't entirely clear ). The simplest solution is to just copy clone(3)'s model -- always use u64s. It will waste a little more space in the struct, but it removes a possible future headache. This patch is intended to replace the corresponding patches in Al's #work.openat2 tree (and *will not* apply on Linus' tree). @Al: I will send some additional patches later, but they will require proper design review since they're ABI-related features (namely, adding a way to check what features a syscall supports as I outlined in my talk here[1]). [1]: https://youtu.be/ggD-eb3yPVs Aleksa Sarai (2): open: introduce openat2(2) syscall selftests: add openat2(2) selftests CREDITS | 4 +- MAINTAINERS | 1 + arch/alpha/kernel/syscalls/syscall.tbl | 1 + arch/arm/tools/syscall.tbl | 1 + arch/arm64/include/asm/unistd.h | 2 +- arch/arm64/include/asm/unistd32.h | 2 + arch/ia64/kernel/syscalls/syscall.tbl | 1 + arch/m68k/kernel/syscalls/syscall.tbl | 1 + arch/microblaze/kernel/syscalls/syscall.tbl | 1 + arch/mips/kernel/syscalls/syscall_n32.tbl | 1 + arch/mips/kernel/syscalls/syscall_n64.tbl | 1 + arch/mips/kernel/syscalls/syscall_o32.tbl | 1 + arch/parisc/kernel/syscalls/syscall.tbl | 1 + arch/powerpc/kernel/syscalls/syscall.tbl | 1 + arch/s390/kernel/syscalls/syscall.tbl | 1 + arch/sh/kernel/syscalls/syscall.tbl | 1 + arch/sparc/kernel/syscalls/syscall.tbl | 1 + arch/x86/entry/syscalls/syscall_32.tbl | 1 + arch/x86/entry/syscalls/syscall_64.tbl | 1 + arch/xtensa/kernel/syscalls/syscall.tbl | 1 + fs/open.c | 147 +++-- include/linux/fcntl.h | 16 +- include/linux/syscalls.h | 3 + include/uapi/asm-generic/unistd.h | 5 +- include/uapi/linux/fcntl.h | 2 +- include/uapi/linux/openat2.h | 39 ++ tools/testing/selftests/Makefile | 1 + tools/testing/selftests/openat2/.gitignore | 1 + tools/testing/selftests/openat2/Makefile | 8 + tools/testing/selftests/openat2/helpers.c | 109 ++++ tools/testing/selftests/openat2/helpers.h | 106 ++++ .../testing/selftests/openat2/openat2_test.c | 312 +++++++++++ .../selftests/openat2/rename_attack_test.c | 160 ++++++ .../testing/selftests/openat2/resolve_test.c | 523 ++++++++++++++++++ 34 files changed, 1418 insertions(+), 39 deletions(-) create mode 100644 include/uapi/linux/openat2.h create mode 100644 tools/testing/selftests/openat2/.gitignore create mode 100644 tools/testing/selftests/openat2/Makefile create mode 100644 tools/testing/selftests/openat2/helpers.c create mode 100644 tools/testing/selftests/openat2/helpers.h create mode 100644 tools/testing/selftests/openat2/openat2_test.c create mode 100644 tools/testing/selftests/openat2/rename_attack_test.c create mode 100644 tools/testing/selftests/openat2/resolve_test.c