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=-9.7 required=3.0 tests=BAD_ENC_HEADER,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,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 B10FEC432C3 for ; Wed, 27 Nov 2019 20:42:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7F79421783 for ; Wed, 27 Nov 2019 20:42:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574887347; bh=QTntiOm27ELfX+4pHEMJoOCTT0p1VFvY5sE0aEjOdi0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=sXMHfXoNAVj9kKHdW4Mn9Ir8KNOkLfntPg2JR2H9ik13+Iwr0SYgu22mxT3HhTs3z Cb9R4zcVTxHzybTm9RKeHGUoUIDpyNejUJQ0B5Aiw21ZcCeKlYtmlrA61i15nwKhBU L4bK8Ed1CVBrmQTMzX6OrDBlXp1207KofNIuBk+c= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728788AbfK0Um0 (ORCPT ); Wed, 27 Nov 2019 15:42:26 -0500 Received: from mail.kernel.org ([198.145.29.99]:48652 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729319AbfK0UmY (ORCPT ); Wed, 27 Nov 2019 15:42:24 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 089D421783; Wed, 27 Nov 2019 20:42:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574887343; bh=QTntiOm27ELfX+4pHEMJoOCTT0p1VFvY5sE0aEjOdi0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MoiMO41fOt+S2hMGehRuc5J6zIUAFIGDEKjqg11ATGukbff5D5mM0BaxmMLvl3DnU j83RKmxBeMF60pz9dBj7Pc5QivZkCDprjaLDzNLjgJnqPLg2A1/MjMpevX/1buihHQ sYNzmx1u56MBZLFElKUjnEbUndNBmMqHFW7whKFo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "=?UTF-8?q?Ernesto=20A . =20Fern=C3=A1ndez?=" , Vyacheslav Dubeyko , Andrew Morton , Linus Torvalds , Sasha Levin Subject: [PATCH 4.9 075/151] hfsplus: fix return value of hfsplus_get_block() Date: Wed, 27 Nov 2019 21:30:58 +0100 Message-Id: <20191127203035.132076789@linuxfoundation.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191127203000.773542911@linuxfoundation.org> References: <20191127203000.773542911@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Ernesto A. Fernández [ Upstream commit 839c3a6a5e1fbc8542d581911b35b2cb5cd29304 ] Direct writes to empty inodes fail with EIO. The generic direct-io code is in part to blame (a patch has been submitted as "direct-io: allow direct writes to empty inodes"), but hfsplus is worse affected than the other filesystems because the fallback to buffered I/O doesn't happen. The problem is the return value of hfsplus_get_block() when called with !create. Change it to be more consistent with the other modules. Link: http://lkml.kernel.org/r/2cd1301404ec7cf1e39c8f11a01a4302f1460ad6.1539195310.git.ernesto.mnd.fernandez@gmail.com Signed-off-by: Ernesto A. Fernández Reviewed-by: Vyacheslav Dubeyko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin --- fs/hfsplus/extents.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/hfsplus/extents.c b/fs/hfsplus/extents.c index ce0b8f8374081..d93c051559cb8 100644 --- a/fs/hfsplus/extents.c +++ b/fs/hfsplus/extents.c @@ -236,7 +236,9 @@ int hfsplus_get_block(struct inode *inode, sector_t iblock, ablock = iblock >> sbi->fs_shift; if (iblock >= hip->fs_blocks) { - if (iblock > hip->fs_blocks || !create) + if (!create) + return 0; + if (iblock > hip->fs_blocks) return -EIO; if (ablock >= hip->alloc_blocks) { res = hfsplus_file_extend(inode, false); -- 2.20.1