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=-16.0 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 1D3B9C11F68 for ; Thu, 8 Jul 2021 06:35:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F2C9C61CD1 for ; Thu, 8 Jul 2021 06:35:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229838AbhGHGiF (ORCPT ); Thu, 8 Jul 2021 02:38:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56188 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230396AbhGHGiB (ORCPT ); Thu, 8 Jul 2021 02:38:01 -0400 Received: from mail-ed1-x532.google.com (mail-ed1-x532.google.com [IPv6:2a00:1450:4864:20::532]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DCF73C06175F; Wed, 7 Jul 2021 23:35:18 -0700 (PDT) Received: by mail-ed1-x532.google.com with SMTP id t3so6846586edt.12; Wed, 07 Jul 2021 23:35:18 -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=+aL8eUyCcZIm7m9c9cpQrgQm638OpqOKLxLINa0Iv48=; b=n7IrrwOZ90WSiTV/5g19dM6dn5cB+ZxsruZocVQdDOMmm1W4SWrVLQo1BTgxxZakff Rp/FImeAafFltRdJCKRa3t74NuhPKOeUFI+feaFHfTlyx+5OzpBFM9i2eYm0ErfiR3Aw +s1UEnpNypLP0yLkWfCjfrKMcISLSkirfGlMYL1zxMH8kS/L0OtehqI6TYcJ7jh0qR/D iIv63/0yGGEgyyXAH/xSMGR+aUmW5GkDoFT3D+Ae9LxNwebucGytq/a3XeYF1VP+4gIf Yj18dx7xIpe31JVdFqaUNDpwhVdXh08NGL1k6dC2S+HBCW0+SVvETJNvOzByuRdT2sx5 xiFg== 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=+aL8eUyCcZIm7m9c9cpQrgQm638OpqOKLxLINa0Iv48=; b=Qv4Cumr91Wi9bl4pRtyL9H2wEaSxNefqe0RV1LG9kCvYoPqyxPZJpb0qtYXJgai9xM zO71VQAlsjSOj2YP0qg5sZxgIEFuVuH3mzBZO/tXKD/urb7GqaO2FuD1T77ImU/oo5Xh fOLFy3UTN0+fvWEa0teqY++p3BpyiDdPe15JTWm61gv0AeScFVzLGAPoGraps79NS8mq CtFerx/QDMHpv4gw6FbQ8dK374AHzqDLEpNV5JyX5JyMI9xSSBmwIGQzBTzZa1P7+Wdz MH6t3SLUvxbzULwdzV8DZIQvGoXApyL3pKTyPY1p29rw/h5KyyuMZSrZRL17DgbwJByO C/XQ== X-Gm-Message-State: AOAM530qTZdcjcZokuX5jWWd4tWu3BALtqeUG7o+BzytDWT1ZQorBqiE vcEPNfXo+OvlOYqUFLiGOsQ= X-Google-Smtp-Source: ABdhPJx9W3O5wCAhbS9cqd/Y/s5TZhFetTt0+7Y16o8/2uxaAFETH+Dbu3tP89b7b+3a5o+pZPw51Q== X-Received: by 2002:aa7:dc0c:: with SMTP id b12mr36266761edu.105.1625726117585; Wed, 07 Jul 2021 23:35:17 -0700 (PDT) Received: from carbon.v ([108.61.166.58]) by smtp.googlemail.com with ESMTPSA id u21sm410260eja.59.2021.07.07.23.35.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Jul 2021 23:35:17 -0700 (PDT) From: Dmitry Kadashev To: Jens Axboe , Alexander Viro , Christian Brauner , Linus Torvalds Cc: Pavel Begunkov , linux-fsdevel@vger.kernel.org, io-uring@vger.kernel.org, Dmitry Kadashev Subject: [PATCH v9 06/11] namei: add getname_uflags() Date: Thu, 8 Jul 2021 13:34:42 +0700 Message-Id: <20210708063447.3556403-7-dkadashev@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210708063447.3556403-1-dkadashev@gmail.com> References: <20210708063447.3556403-1-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: Linus Torvalds 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 add984e4bfd0..ab7979f9daaa 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