From mboxrd@z Thu Jan 1 00:00:00 1970 From: Al Viro Subject: Re: [PATCH v15 7/9] open: introduce openat2(2) syscall Date: Wed, 13 Nov 2019 02:29:06 +0000 Message-ID: <20191113022906.GD26530@ZenIV.linux.org.uk> References: <20191105090553.6350-1-cyphar@cyphar.com> <20191105090553.6350-8-cyphar@cyphar.com> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <20191105090553.6350-8-cyphar@cyphar.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Aleksa Sarai Cc: Jeff Layton , "J. Bruce Fields" , Arnd Bergmann , David Howells , Shuah Khan , Shuah Khan , Ingo Molnar , Peter Zijlstra , Christian Brauner , Eric Biederman , Andy Lutomirski , Andrew Morton , Alexei Starovoitov , Kees Cook , Jann Horn , Tycho Andersen , David Drysdale , Chanho Min , Oleg Nesterov , Rasmus Villemoes , Alexander On Tue, Nov 05, 2019 at 08:05:51PM +1100, Aleksa Sarai wrote: > +/* > + * Arguments for how openat2(2) should open the target path. If @resolve is > + * zero, then openat2(2) operates very similarly to openat(2). > + * > + * However, unlike openat(2), unknown bits in @flags result in -EINVAL rather > + * than being silently ignored. @mode must be zero unless one of {O_CREAT, > + * O_TMPFILE} are set, and @upgrade_mask must be zero unless O_PATH is set. > + * > + * @flags: O_* flags. > + * @mode: O_CREAT/O_TMPFILE file mode. > + * @upgrade_mask: UPGRADE_* flags (to restrict O_PATH re-opening). ??? > + * @resolve: RESOLVE_* flags. > + */ > +struct open_how { > + __aligned_u64 flags; > + __u16 mode; > + __u16 __padding[3]; /* must be zeroed */ > + __aligned_u64 resolve; > +}; From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from zeniv.linux.org.uk ([195.92.253.2]:39700 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727063AbfKMC3n (ORCPT ); Tue, 12 Nov 2019 21:29:43 -0500 Date: Wed, 13 Nov 2019 02:29:06 +0000 From: Al Viro Subject: Re: [PATCH v15 7/9] open: introduce openat2(2) syscall Message-ID: <20191113022906.GD26530@ZenIV.linux.org.uk> References: <20191105090553.6350-1-cyphar@cyphar.com> <20191105090553.6350-8-cyphar@cyphar.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191105090553.6350-8-cyphar@cyphar.com> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Aleksa Sarai Cc: Jeff Layton , "J. Bruce Fields" , Arnd Bergmann , David Howells , Shuah Khan , Shuah Khan , Ingo Molnar , Peter Zijlstra , Christian Brauner , Eric Biederman , Andy Lutomirski , Andrew Morton , Alexei Starovoitov , Kees Cook , Jann Horn , Tycho Andersen , David Drysdale , Chanho Min , Oleg Nesterov , Rasmus Villemoes , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Aleksa Sarai , Linus Torvalds , containers@lists.linux-foundation.org, linux-alpha@vger.kernel.org, linux-api@vger.kernel.org, libc-alpha@sourceware.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-xtensa@linux-xtensa.org, sparclinux@vger.kernel.org Message-ID: <20191113022906.9Qi7ua2ZxVDFTMFeCvATTIcTSCkGzl0Yrfjj2jMQlmo@z> On Tue, Nov 05, 2019 at 08:05:51PM +1100, Aleksa Sarai wrote: > +/* > + * Arguments for how openat2(2) should open the target path. If @resolve is > + * zero, then openat2(2) operates very similarly to openat(2). > + * > + * However, unlike openat(2), unknown bits in @flags result in -EINVAL rather > + * than being silently ignored. @mode must be zero unless one of {O_CREAT, > + * O_TMPFILE} are set, and @upgrade_mask must be zero unless O_PATH is set. > + * > + * @flags: O_* flags. > + * @mode: O_CREAT/O_TMPFILE file mode. > + * @upgrade_mask: UPGRADE_* flags (to restrict O_PATH re-opening). ??? > + * @resolve: RESOLVE_* flags. > + */ > +struct open_how { > + __aligned_u64 flags; > + __u16 mode; > + __u16 __padding[3]; /* must be zeroed */ > + __aligned_u64 resolve; > +}; From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8045EC43331 for ; Wed, 13 Nov 2019 03:40:53 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 20C2F207FC for ; Wed, 13 Nov 2019 03:40:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 20C2F207FC Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=zeniv.linux.org.uk Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 47CVkq0TnHzF6Yr for ; Wed, 13 Nov 2019 14:40:51 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=ftp.linux.org.uk (client-ip=195.92.253.2; helo=zeniv.linux.org.uk; envelope-from=viro@ftp.linux.org.uk; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=zeniv.linux.org.uk Received: from ZenIV.linux.org.uk (zeniv.linux.org.uk [195.92.253.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 47CT8x52SJzF4XX for ; Wed, 13 Nov 2019 13:29:52 +1100 (AEDT) Received: from viro by ZenIV.linux.org.uk with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1iUiP4-0000ox-FH; Wed, 13 Nov 2019 02:29:06 +0000 Date: Wed, 13 Nov 2019 02:29:06 +0000 From: Al Viro To: Aleksa Sarai Subject: Re: [PATCH v15 7/9] open: introduce openat2(2) syscall Message-ID: <20191113022906.GD26530@ZenIV.linux.org.uk> References: <20191105090553.6350-1-cyphar@cyphar.com> <20191105090553.6350-8-cyphar@cyphar.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191105090553.6350-8-cyphar@cyphar.com> User-Agent: Mutt/1.12.1 (2019-06-15) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org, Peter Zijlstra , Rasmus Villemoes , Alexei Starovoitov , linux-kernel@vger.kernel.org, David Howells , linux-kselftest@vger.kernel.org, sparclinux@vger.kernel.org, Jiri Olsa , linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, Tycho Andersen , Aleksa Sarai , Shuah Khan , Alexander Shishkin , Ingo Molnar , linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-xtensa@linux-xtensa.org, Kees Cook , Arnd Bergmann , Jann Horn , linuxppc-dev@lists.ozlabs.org, linux-m68k@lists.linux-m68k.org, Andy Lutomirski , Shuah Khan , Namhyung Kim , David Drysdale , Christian Brauner , "J. Bruce Fields" , libc-alpha@sourceware.org, linux-parisc@vger.kernel.org, linux-api@vger.kernel.org, Chanho Min , Jeff Layton , Oleg Nesterov , Eric Biederman , linux-alpha@vger.kernel.org, linux-fsdevel@vger.kernel.org, Andrew Morton , Linus Torvalds , containers@lists.linux-foundation.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Tue, Nov 05, 2019 at 08:05:51PM +1100, Aleksa Sarai wrote: > +/* > + * Arguments for how openat2(2) should open the target path. If @resolve is > + * zero, then openat2(2) operates very similarly to openat(2). > + * > + * However, unlike openat(2), unknown bits in @flags result in -EINVAL rather > + * than being silently ignored. @mode must be zero unless one of {O_CREAT, > + * O_TMPFILE} are set, and @upgrade_mask must be zero unless O_PATH is set. > + * > + * @flags: O_* flags. > + * @mode: O_CREAT/O_TMPFILE file mode. > + * @upgrade_mask: UPGRADE_* flags (to restrict O_PATH re-opening). ??? > + * @resolve: RESOLVE_* flags. > + */ > +struct open_how { > + __aligned_u64 flags; > + __u16 mode; > + __u16 __padding[3]; /* must be zeroed */ > + __aligned_u64 resolve; > +}; From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C056AC43331 for ; Wed, 13 Nov 2019 02:29:57 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 93E202067B for ; Wed, 13 Nov 2019 02:29:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="oX9lsM/C" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 93E202067B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=zeniv.linux.org.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=JIhjpXbX5nd2sJVOTGy6qbpGyrZu04KMuKEyYzgPyF8=; b=oX9lsM/CkJP1JT thtgm2Vpfpxwi3EMbHkF5NqJg/RO7SU8H58SGBFiMHT1FfPKD9Yljjt+XVdGpAVnl2aZ36MdiLvNT Sxcm4fZcT24wY8Itichmm4k+GvM01L6gah9hDNOnSFpKPGMYO6njx7RNgY0nfrpf2Kz+t4ZGuLLQ5 WxXnZAAFnT6IeivB59y+G7FlafndXmTej1x7QaiywNSAD8hkqX8cz5NPk238DN4YBTS2o+gApmThn rpWpuyQJ195N3d4B+a1mJiE5YnBcI287gwN/UO75m6k3bqOG/hOifr3mtti29q6RiiluHEQwrJhiG JhpnFXM1kmIsVSQG5UXQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iUiPl-0007m3-Vh; Wed, 13 Nov 2019 02:29:49 +0000 Received: from zeniv.linux.org.uk ([195.92.253.2]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iUiPi-0007kE-Vw for linux-arm-kernel@lists.infradead.org; Wed, 13 Nov 2019 02:29:48 +0000 Received: from viro by ZenIV.linux.org.uk with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1iUiP4-0000ox-FH; Wed, 13 Nov 2019 02:29:06 +0000 Date: Wed, 13 Nov 2019 02:29:06 +0000 From: Al Viro To: Aleksa Sarai Subject: Re: [PATCH v15 7/9] open: introduce openat2(2) syscall Message-ID: <20191113022906.GD26530@ZenIV.linux.org.uk> References: <20191105090553.6350-1-cyphar@cyphar.com> <20191105090553.6350-8-cyphar@cyphar.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20191105090553.6350-8-cyphar@cyphar.com> User-Agent: Mutt/1.12.1 (2019-06-15) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191112_182947_026283_3641F16D X-CRM114-Status: UNSURE ( 9.07 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org, Peter Zijlstra , Rasmus Villemoes , Alexei Starovoitov , linux-kernel@vger.kernel.org, David Howells , linux-kselftest@vger.kernel.org, sparclinux@vger.kernel.org, Jiri Olsa , linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, Tycho Andersen , Aleksa Sarai , Shuah Khan , Alexander Shishkin , Ingo Molnar , linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-xtensa@linux-xtensa.org, Kees Cook , Arnd Bergmann , Jann Horn , linuxppc-dev@lists.ozlabs.org, linux-m68k@lists.linux-m68k.org, Andy Lutomirski , Shuah Khan , Namhyung Kim , David Drysdale , Christian Brauner , "J. Bruce Fields" , libc-alpha@sourceware.org, linux-parisc@vger.kernel.org, linux-api@vger.kernel.org, Chanho Min , Jeff Layton , Oleg Nesterov , Eric Biederman , linux-alpha@vger.kernel.org, linux-fsdevel@vger.kernel.org, Andrew Morton , Linus Torvalds , containers@lists.linux-foundation.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Nov 05, 2019 at 08:05:51PM +1100, Aleksa Sarai wrote: > +/* > + * Arguments for how openat2(2) should open the target path. If @resolve is > + * zero, then openat2(2) operates very similarly to openat(2). > + * > + * However, unlike openat(2), unknown bits in @flags result in -EINVAL rather > + * than being silently ignored. @mode must be zero unless one of {O_CREAT, > + * O_TMPFILE} are set, and @upgrade_mask must be zero unless O_PATH is set. > + * > + * @flags: O_* flags. > + * @mode: O_CREAT/O_TMPFILE file mode. > + * @upgrade_mask: UPGRADE_* flags (to restrict O_PATH re-opening). ??? > + * @resolve: RESOLVE_* flags. > + */ > +struct open_how { > + __aligned_u64 flags; > + __u16 mode; > + __u16 __padding[3]; /* must be zeroed */ > + __aligned_u64 resolve; > +}; _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel