From patchwork Tue Sep 4 20:40:16 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Fasheh X-Patchwork-Id: 10587883 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E937014E0 for ; Tue, 4 Sep 2018 20:41:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D79092A0E4 for ; Tue, 4 Sep 2018 20:41:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C7AC22A0E8; Tue, 4 Sep 2018 20:41:00 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7BEEE2A0E5 for ; Tue, 4 Sep 2018 20:41:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727645AbeIEBHp (ORCPT ); Tue, 4 Sep 2018 21:07:45 -0400 Received: from mx2.suse.de ([195.135.220.15]:48076 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727023AbeIEBHp (ORCPT ); Tue, 4 Sep 2018 21:07:45 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id A2366B151; Tue, 4 Sep 2018 20:40:56 +0000 (UTC) From: Mark Fasheh To: Andrew Morton Cc: Al Viro , linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org, Michael Kerrisk , linux-btrfs@vger.kernel.org, linux-xfs@vger.kernel.org, "Darrick J . Wong" , Adam Borowski , David Sterba , Mark Fasheh Subject: [PATCH v5 2/2] vfs: dedupe should return EPERM if permission is not granted Date: Tue, 4 Sep 2018 13:40:16 -0700 Message-Id: <20180904204016.14494-3-mfasheh@suse.de> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20180904204016.14494-1-mfasheh@suse.de> References: <20180904204016.14494-1-mfasheh@suse.de> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Right now we return EINVAL if a process does not have permission to dedupe a file. This was an oversight on my part. EPERM gives a true description of the nature of our error, and EINVAL is already used for the case that the filesystem does not support dedupe. Signed-off-by: Mark Fasheh Reviewed-by: Darrick J. Wong Acked-by: David Sterba --- fs/read_write.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/read_write.c b/fs/read_write.c index 71e9077f8bc1..7188982e2733 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -2050,7 +2050,7 @@ int vfs_dedupe_file_range(struct file *file, struct file_dedupe_range *same) if (info->reserved) { info->status = -EINVAL; } else if (!allow_file_dedupe(dst_file)) { - info->status = -EINVAL; + info->status = -EPERM; } else if (file->f_path.mnt != dst_file->f_path.mnt) { info->status = -EXDEV; } else if (S_ISDIR(dst->i_mode)) {