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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 96EF7C433FF for ; Thu, 8 Aug 2019 08:28:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 76D792171F for ; Thu, 8 Aug 2019 08:28:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732094AbfHHI2D (ORCPT ); Thu, 8 Aug 2019 04:28:03 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41452 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731844AbfHHI2D (ORCPT ); Thu, 8 Aug 2019 04:28:03 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 4F3F530CADED; Thu, 8 Aug 2019 08:28:03 +0000 (UTC) Received: from pegasus.maiolino.com (ovpn-204-236.brq.redhat.com [10.40.204.236]) by smtp.corp.redhat.com (Postfix) with ESMTP id 074F45C557; Thu, 8 Aug 2019 08:28:00 +0000 (UTC) From: Carlos Maiolino To: linux-fsdevel@vger.kernel.org Cc: hch@lst.de, adilger@dilger.ca, jaegeuk@kernel.org, darrick.wong@oracle.com, miklos@szeredi.hu, rpeterso@redhat.com, linux-xfs@vger.kernel.org Subject: [PATCH 4/9] fibmap: Use bmap instead of ->bmap method in ioctl_fibmap Date: Thu, 8 Aug 2019 10:27:39 +0200 Message-Id: <20190808082744.31405-5-cmaiolino@redhat.com> In-Reply-To: <20190808082744.31405-1-cmaiolino@redhat.com> References: <20190808082744.31405-1-cmaiolino@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.46]); Thu, 08 Aug 2019 08:28:03 +0000 (UTC) Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Now we have the possibility of proper error return in bmap, use bmap() function in ioctl_fibmap() instead of calling ->bmap method directly. Signed-off-by: Carlos Maiolino --- Changelog: V4: - Ensure ioctl_fibmap() returns 0 in case of error returned from bmap(). Otherwise we'll be changing the user interface (which returns 0 in case of error) V3: - Rename usr_blk to ur_block V2: - Use a local sector_t variable to asign the block number instead of using direct casting. fs/ioctl.c | 29 +++++++++++++++++++---------- 1 file changed, 19 insertions(+), 10 deletions(-) diff --git a/fs/ioctl.c b/fs/ioctl.c index fef3a6bf7c78..6b589c873bc2 100644 --- a/fs/ioctl.c +++ b/fs/ioctl.c @@ -53,19 +53,28 @@ EXPORT_SYMBOL(vfs_ioctl); static int ioctl_fibmap(struct file *filp, int __user *p) { - struct address_space *mapping = filp->f_mapping; - int res, block; + struct inode *inode = file_inode(filp); + int error, ur_block; + sector_t block; - /* do we support this mess? */ - if (!mapping->a_ops->bmap) - return -EINVAL; if (!capable(CAP_SYS_RAWIO)) return -EPERM; - res = get_user(block, p); - if (res) - return res; - res = mapping->a_ops->bmap(mapping, block); - return put_user(res, p); + + error = get_user(ur_block, p); + if (error) + return error; + + block = ur_block; + error = bmap(inode, &block); + + if (error) + ur_block = 0; + else + ur_block = block; + + error = put_user(ur_block, p); + + return error; } /** -- 2.20.1