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,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 4E7D2C47082 for ; Thu, 3 Jun 2021 05:20:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 36A2C613E6 for ; Thu, 3 Jun 2021 05:20:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229764AbhFCFWB (ORCPT ); Thu, 3 Jun 2021 01:22:01 -0400 Received: from mail-ed1-f46.google.com ([209.85.208.46]:34421 "EHLO mail-ed1-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229479AbhFCFWB (ORCPT ); Thu, 3 Jun 2021 01:22:01 -0400 Received: by mail-ed1-f46.google.com with SMTP id cb9so5657192edb.1; Wed, 02 Jun 2021 22:20:02 -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=L+lGiB8phnEr2PFwvu29s12yFsAgkqufFtWzpf3YDgkfKM56DjCSZzcPkV6m6JLzoc 4wR/Rrl32QvUAJ5ntz1X4CUEakwXIWjAVK7nAhMaKvz9kvssHVJw+SEo49cL8mW405iz OYoPlEzp+F3bYmpRfIyAviBYW4+YKPlhQ3gMUCBXnkdFLV8IoJD2vC3xheqw6PgVpEv3 wHz6YTBAw7eShlY3SQjiQqAAKw9kgru34mQGddAGsSlKlYlXIbR7ZVC9Hq20+DEh4TBG 4UbjYO4L6GxDg7uSvuMXmOjY5/7C+h3Zs1TJUqZP0LPr2+q/H8PCTpJHZziq25dZEnYX VBzw== 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=fBBVTUSrxyLOy9g+s3b3Z9xehorbKmjloyR6hwpF/37nkNrw7AKTFUAS24+V3vpXkq H4GWBFHEEaPLU84fgeKLs7Bsrp8LlIkwCo5pJzgVKLoMpPnhhMY+7qLCT4SW/G0nQYDs u3GOAI4E1TQyE5C+H9yfNV9KF5KlW6Tb4J7EIyqtSNYxvJa0pQ9H/GTBp8pqwlZdl0ZW yXwoiEZeng1S1tYwYTqkh1hlP3LMDnmbWbPhmw50tFH1Pmr9F1Xp528Pk1adA5ptCBiT rHBlfRFTnSLxsezQPlkHb5lFkGT3M7/5tOJyGhYHRUbm64mTEoeiVECiQ1aI8hKxlfGw 8bkQ== X-Gm-Message-State: AOAM530/gEDQBsry9eyb2d5SAtE4lXdkhpFMTQ+GpLmQUIDOML4Pv0rA YzyE1Rnm0ZfEzwlWQOSxQ8Q= X-Google-Smtp-Source: ABdhPJxBQ1Ua7O8zOK+V7Vo+n9XvLnoMiqPIi1V4hs69VpXooJkakqO4wwdVGDk1CA1RCwJmVrELww== X-Received: by 2002:aa7:cb84:: with SMTP id r4mr41879537edt.187.1622697542301; Wed, 02 Jun 2021 22:19:02 -0700 (PDT) Received: from carbon.v ([108.61.166.58]) by smtp.googlemail.com with ESMTPSA id f7sm963668ejz.95.2021.06.02.22.19.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Jun 2021 22:19:02 -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 v5 05/10] namei: add getname_uflags() Date: Thu, 3 Jun 2021 12:18:31 +0700 Message-Id: <20210603051836.2614535-6-dkadashev@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210603051836.2614535-1-dkadashev@gmail.com> References: <20210603051836.2614535-1-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