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=-15.8 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 8BC50C433ED for ; Thu, 13 May 2021 11:08:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6EB6361422 for ; Thu, 13 May 2021 11:08:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233122AbhEMLJw (ORCPT ); Thu, 13 May 2021 07:09:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54498 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233136AbhEMLI5 (ORCPT ); Thu, 13 May 2021 07:08:57 -0400 Received: from mail-ej1-x636.google.com (mail-ej1-x636.google.com [IPv6:2a00:1450:4864:20::636]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AACF3C061763; Thu, 13 May 2021 04:07:45 -0700 (PDT) Received: by mail-ej1-x636.google.com with SMTP id c20so3910836ejm.3; Thu, 13 May 2021 04:07:45 -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=J95HUr/u051ThgJM2GbK44c2L7CudLAKit1ZcrrYHBk=; b=grSx8OOYqkaAMoYnqpd2E9YY2pDJ3jpQTS16+0d1CRCaBUJHoesBfD9JOfiCsPtEyu 8eRJYk4pmlw/l1atupdmNXBy5NC6/iZ/V0gnlD1EGsMtX3x9ac0GWgr3XJ7gJMzU0kjc rgX/lzl39NNAZyMG2hJ1E0kFhhCgxOzOVATLDKrynHQo27Cz26RJNyybbAnAyFoyu2gx Rd4wY5RXBi/0Z7ruI+lDM9ld66ZAcYzxJN9hyrCYgBQDQZFBcF/N+vBErLeyRreHy5Ou aTprTAqOaJ/MUE61zEhs5iFyCdZHZ1EceF1Olg2COZNwAxGqZOlN/BfuhSSgI4t0upzB IRsQ== 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=J95HUr/u051ThgJM2GbK44c2L7CudLAKit1ZcrrYHBk=; b=HiMqPYvUpTminXh+3cHxvESe9HLUL7uiKqgqX5Uc2ClI37wMPiEyMTTz56iT8JjMG+ dO1Cixb0/WKMREe32YJKgcjeiCpKH7Yh7d2gz+jErOSoijZ0MYRGB2QHXH6WyOhCu4OH ylBSdVkOhYCBdJ2htS/pmBxhIW2/AzbjZw2eoGOTn4wMF65EyPfmxFvM+gkwAc6djXfR IO14YZdcSDyk+Jof/BstZ6Z4FF/U8f9I6mSF2wibfdKUMR2CrWyaySz4nwiddxlSpikk P2ABLSQHt3kgy75/0AxFeSM1jnvecp50HhaYGKZRoH5RtT6IBCt3wI9MDGOWnQouf/vH Wesw== X-Gm-Message-State: AOAM533pTVt2v4tOAQQ59gxYPEcuFen9mHs4L4BREyslAahXzRNLN7hp YRtJ8CzVNioobXOnicb2w70= X-Google-Smtp-Source: ABdhPJycMt1W3nHcIOPaAfJvAyg/qSCqeB+shffL5ez3pn8y9ieqExBGzoRwNeaCt/Aj+KJQYKFLtQ== X-Received: by 2002:a17:906:6ace:: with SMTP id q14mr44492137ejs.79.1620904064428; Thu, 13 May 2021 04:07:44 -0700 (PDT) Received: from carbon.v ([108.61.166.58]) by smtp.googlemail.com with ESMTPSA id bn7sm1670864ejb.111.2021.05.13.04.07.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 May 2021 04:07:44 -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 v4 5/6] namei: add getname_uflags() Date: Thu, 13 May 2021 18:06:11 +0700 Message-Id: <20210513110612.688851-6-dkadashev@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210513110612.688851-1-dkadashev@gmail.com> References: <20210513110612.688851-1-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 Suggested-by: Christian Brauner Link: https://lore.kernel.org/io-uring/20210415100815.edrn4a7cy26wkowe@wittgenstein/ Signed-off-by: Christian Brauner Signed-off-by: Dmitry Kadashev --- Christian, I've kept your Signed-off-by here, even though I took only part of the change (leaving getname_flags() switch to boolean out to keep the change smaller). Please let me know if that is OK or not and/or if you prefer the rest of the change be restored. 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 bf4e90d3ab18..c46e70682fc0 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2783,6 +2783,7 @@ 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