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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 B0681C49EA5 for ; Thu, 24 Jun 2021 11:15:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9732E600CC for ; Thu, 24 Jun 2021 11:15:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232421AbhFXLRg (ORCPT ); Thu, 24 Jun 2021 07:17:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56256 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232338AbhFXLRd (ORCPT ); Thu, 24 Jun 2021 07:17:33 -0400 Received: from mail-lj1-x234.google.com (mail-lj1-x234.google.com [IPv6:2a00:1450:4864:20::234]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 15C3BC061756; Thu, 24 Jun 2021 04:15:14 -0700 (PDT) Received: by mail-lj1-x234.google.com with SMTP id f13so7208440ljp.10; Thu, 24 Jun 2021 04:15:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=cjY5NIv8T/UjPF6/khgDh63aie+4OSg4ezXbryOnIVo=; b=iPq9xrKb0sRL7Yr9n1OmNxiPLN2GfT6ZyRhYwm7ARhlN0/DRkMHt2sFM7RGXlgBmCV IMFjahnn5wtgJUJI47fapqOkiwwIjs4A9WEJ6fG6zbw0TWz6faa7a7bonY5Hvlsv5GR/ h0QzJ85j9RBHBPEY/bKHGnMq4gL+WdMZa0qY4g5eRaVCH60XEJCCUF0vp5AmMt+HpTm7 8mFcQbensaJuqiymZ32luFOi7inXI6IW23lUhUPqFgTabKGovtPwlyaiy7W3fGQrGtXM LmKtKpxjgM+dLRRuKjBDkqrFbnfxDYWxv9GeF5YyesWUq+4B8xHMJoYJNK+wEMpdvr2N 2/Iw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=cjY5NIv8T/UjPF6/khgDh63aie+4OSg4ezXbryOnIVo=; b=KhMOIi2uA3U6a5QQbi0CWWw8WchlRwQKGijqhbpzzKtjJpYG1puh+wHsZCQmqIY8x+ Zz60CUzDvDDK4wDkN5xHFJLdAW9cVt9USSxdBxkfjgHVGXYHGWpuYET8+Rh4iqq3XWAi 2YDgoYLHIZowBXCIFdQ2JgHQWpxd3pGElZOmT8mCwdkNv9FHiv6sTL6lwEtkMJOduLHR NOsE+lMa94bnLpGlL3U91vv977Glg5vlTeSvbXXmlUbWR1A2D+nJ/fIqEvlLddMxt8Nm Rm2ZqylYnBOhV+aBzkLTDUghzUEkO53hPDNp3uTULkLmew2QfGZainaNfaox+AJUOmRh 30Cw== X-Gm-Message-State: AOAM530UrvsmsoCVuBDUvaovMFZQowc1ZBuK6QghZlBP4REOGMwkHSc2 6VDrN3BhCWVV7OQ1MwUrCiU= X-Google-Smtp-Source: ABdhPJxku+acLC+qRFUlPCKbuqqKavPd77Hh1oluLVaX7b7XEZQu2t7SgzsHbaqTBdNQSbvIdp+1vA== X-Received: by 2002:a2e:8941:: with SMTP id b1mr3566449ljk.284.1624533312471; Thu, 24 Jun 2021 04:15:12 -0700 (PDT) Received: from carbon.v ([94.143.149.146]) by smtp.googlemail.com with ESMTPSA id q21sm195293lfp.233.2021.06.24.04.15.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Jun 2021 04:15:11 -0700 (PDT) From: Dmitry Kadashev To: Jens Axboe , Alexander Viro , Christian Brauner Cc: Pavel Begunkov , linux-fsdevel@vger.kernel.org, io-uring@vger.kernel.org, Dmitry Kadashev Subject: [PATCH v6 5/9] namei: add getname_uflags() Date: Thu, 24 Jun 2021 18:14:48 +0700 Message-Id: <20210624111452.658342-6-dkadashev@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210624111452.658342-1-dkadashev@gmail.com> References: <20210624111452.658342-1-dkadashev@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org There are a couple of places where we already open-code the (flags & AT_EMPTY_PATH) check and io_uring will likely add another one in the future. Let's just add a simple helper getname_uflags() that handles this directly and use it. Cc: Al Viro Cc: Christian Brauner Link: https://lore.kernel.org/io-uring/20210415100815.edrn4a7cy26wkowe@wittgenstein/ Signed-off-by: Christian Brauner Signed-off-by: Dmitry Kadashev Acked-by: Christian Brauner --- fs/exec.c | 8 ++------ fs/namei.c | 8 ++++++++ include/linux/fs.h | 1 + 3 files changed, 11 insertions(+), 6 deletions(-) diff --git a/fs/exec.c b/fs/exec.c index 18594f11c31f..df33ecaf2111 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -2069,10 +2069,8 @@ SYSCALL_DEFINE5(execveat, const char __user *const __user *, envp, int, flags) { - int lookup_flags = (flags & AT_EMPTY_PATH) ? LOOKUP_EMPTY : 0; - return do_execveat(fd, - getname_flags(filename, lookup_flags, NULL), + getname_uflags(filename, flags), argv, envp, flags); } @@ -2090,10 +2088,8 @@ COMPAT_SYSCALL_DEFINE5(execveat, int, fd, const compat_uptr_t __user *, envp, int, flags) { - int lookup_flags = (flags & AT_EMPTY_PATH) ? LOOKUP_EMPTY : 0; - return compat_do_execveat(fd, - getname_flags(filename, lookup_flags, NULL), + getname_uflags(filename, flags), argv, envp, flags); } #endif diff --git a/fs/namei.c b/fs/namei.c index 76572d703e82..010455938826 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -203,6 +203,14 @@ getname_flags(const char __user *filename, int flags, int *empty) return result; } +struct filename * +getname_uflags(const char __user *filename, int uflags) +{ + int flags = (uflags & AT_EMPTY_PATH) ? LOOKUP_EMPTY : 0; + + return getname_flags(filename, flags, NULL); +} + struct filename * getname(const char __user * filename) { diff --git a/include/linux/fs.h b/include/linux/fs.h index c3c88fdb9b2a..5885a68d2c12 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2781,6 +2781,7 @@ static inline struct file *file_clone_open(struct file *file) extern int filp_close(struct file *, fl_owner_t id); extern struct filename *getname_flags(const char __user *, int, int *); +extern struct filename *getname_uflags(const char __user *, int); extern struct filename *getname(const char __user *); extern struct filename *getname_kernel(const char *); extern void putname(struct filename *name); -- 2.30.2