From patchwork Mon May 4 17:08:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 1282843 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-cifs-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=JCxHzG0B; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49G8Sc3H7Qz9sSW for ; Tue, 5 May 2020 03:08:16 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730007AbgEDRIL (ORCPT ); Mon, 4 May 2020 13:08:11 -0400 Received: from us-smtp-2.mimecast.com ([205.139.110.61]:41200 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729950AbgEDRIJ (ORCPT ); Mon, 4 May 2020 13:08:09 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1588612088; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jGsRjZoExv8NyQvz9ApmlxkhSFgBsOut6sh02zorMoA=; b=JCxHzG0BPBNKPgZORzVq5La+EZLsFTjogk+pS19ldyBcZF75MzilQQX/GsN/j7q9NRMwk6 7zIQSiG8GlgKXI1RK0pskeDO//fI3tQ8NO5uiHQija5rOjSVdPJymDWcs0xOoD2Ukm/uJq kFjpcOOAato1JjxeQG72bgrQ9Od2hS4= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-142-C_9Evdc_MSe884tIkzDSpg-1; Mon, 04 May 2020 13:08:06 -0400 X-MC-Unique: C_9Evdc_MSe884tIkzDSpg-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C57B31B18BD5; Mon, 4 May 2020 17:08:04 +0000 (UTC) Received: from warthog.procyon.org.uk (ovpn-118-225.rdu2.redhat.com [10.10.118.225]) by smtp.corp.redhat.com (Postfix) with ESMTP id D63AB6248C; Mon, 4 May 2020 17:08:01 +0000 (UTC) Organization: Red Hat UK Ltd. 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Registered in England and Wales under Company Registration No. 3798903 Subject: [RFC PATCH 04/61] vfs: Export rw_verify_area() for use by cachefiles From: David Howells To: Trond Myklebust , Anna Schumaker , Steve French , Jeff Layton Cc: dhowells@redhat.com, Matthew Wilcox , Alexander Viro , linux-afs@lists.infradead.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs-developer@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Date: Mon, 04 May 2020 18:08:01 +0100 Message-ID: <158861208104.340223.6703218709853452130.stgit@warthog.procyon.org.uk> In-Reply-To: <158861203563.340223.7585359869938129395.stgit@warthog.procyon.org.uk> References: <158861203563.340223.7585359869938129395.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.21 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org Export rw_verify_area() for so that cachefiles can use it before issuing call_read_iter() and call_write_iter() to effect async DIO operations against the cache. Signed-off-by: David Howells --- fs/internal.h | 5 ----- fs/read_write.c | 1 + include/linux/fs.h | 1 + 3 files changed, 2 insertions(+), 5 deletions(-) diff --git a/fs/internal.h b/fs/internal.h index aa5d45524e87..fade86c4e4b4 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -159,11 +159,6 @@ extern char *simple_dname(struct dentry *, char *, int); extern void dput_to_list(struct dentry *, struct list_head *); extern void shrink_dentry_list(struct list_head *); -/* - * read_write.c - */ -extern int rw_verify_area(int, struct file *, const loff_t *, size_t); - /* * pipe.c */ diff --git a/fs/read_write.c b/fs/read_write.c index bbfa9b12b15e..eb18270a1e14 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -400,6 +400,7 @@ int rw_verify_area(int read_write, struct file *file, const loff_t *ppos, size_t return security_file_permission(file, read_write == READ ? MAY_READ : MAY_WRITE); } +EXPORT_SYMBOL(rw_verify_area); static ssize_t new_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos) { diff --git a/include/linux/fs.h b/include/linux/fs.h index 4f6f59b4f22a..2d2704aff9df 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2895,6 +2895,7 @@ extern int notify_change(struct dentry *, struct iattr *, struct inode **); extern int inode_permission(struct inode *, int); extern int generic_permission(struct inode *, int); extern int __check_sticky(struct inode *dir, struct inode *inode); +extern int rw_verify_area(int, struct file *, const loff_t *, size_t); static inline bool execute_ok(struct inode *inode) {