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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 14ED2C7618B for ; Fri, 26 Jul 2019 15:33:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DE81C218D4 for ; Fri, 26 Jul 2019 15:33:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564155228; bh=l6NkoVFXeb0+gK7D0V0SudLqjpl5T4uM0prXUjh4vzs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=DxORZpvDw9vuPU2NMnxbsReiDmn8JWeWoxOi/YXgG+tx2jYZhJLsBoZkUKpicpqFj 8hLUX8HgCkFaG6qkHtVO7xYueVBtGCOj42Zb6Jzd7U/s1TrxuQ4l3mBHZs5qxgvMgS mlkdV82Kz3qZnm1DWptVcVIijVv1dHKAsBMOKC/8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389704AbfGZPdr (ORCPT ); Fri, 26 Jul 2019 11:33:47 -0400 Received: from mail.kernel.org ([198.145.29.99]:49204 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389686AbfGZPdn (ORCPT ); Fri, 26 Jul 2019 11:33:43 -0400 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 12AF22054F; Fri, 26 Jul 2019 15:33:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564155222; bh=l6NkoVFXeb0+gK7D0V0SudLqjpl5T4uM0prXUjh4vzs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DXWFLsKt/SFxdoapBZlK1Jnzdqt9d6etOhpDz4agDIgsW9ZvmwI8Ggj0mNRvQZH9i K6GcO+/HXM8cCiCXEtlTxGMpfYwfPsRpenq5Xk7N7ZcNcU8pKE2LjTyqVS0UOIYfkE yR4lpYEIG6Af/UeHY4RdpxFvTxZfC9oU9iJKGcLQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ross Zwisler , Theodore Tso , Jan Kara Subject: [PATCH 4.19 44/50] mm: add filemap_fdatawait_range_keep_errors() Date: Fri, 26 Jul 2019 17:25:19 +0200 Message-Id: <20190726152305.283950324@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190726152300.760439618@linuxfoundation.org> References: <20190726152300.760439618@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ross Zwisler commit aa0bfcd939c30617385ffa28682c062d78050eba upstream. In the spirit of filemap_fdatawait_range() and filemap_fdatawait_keep_errors(), introduce filemap_fdatawait_range_keep_errors() which both takes a range upon which to wait and does not clear errors from the address space. Signed-off-by: Ross Zwisler Signed-off-by: Theodore Ts'o Reviewed-by: Jan Kara Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- include/linux/fs.h | 2 ++ mm/filemap.c | 22 ++++++++++++++++++++++ 2 files changed, 24 insertions(+) --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2651,6 +2651,8 @@ extern int filemap_flush(struct address_ extern int filemap_fdatawait_keep_errors(struct address_space *mapping); extern int filemap_fdatawait_range(struct address_space *, loff_t lstart, loff_t lend); +extern int filemap_fdatawait_range_keep_errors(struct address_space *mapping, + loff_t start_byte, loff_t end_byte); static inline int filemap_fdatawait(struct address_space *mapping) { --- a/mm/filemap.c +++ b/mm/filemap.c @@ -562,6 +562,28 @@ int filemap_fdatawait_range(struct addre EXPORT_SYMBOL(filemap_fdatawait_range); /** + * filemap_fdatawait_range_keep_errors - wait for writeback to complete + * @mapping: address space structure to wait for + * @start_byte: offset in bytes where the range starts + * @end_byte: offset in bytes where the range ends (inclusive) + * + * Walk the list of under-writeback pages of the given address space in the + * given range and wait for all of them. Unlike filemap_fdatawait_range(), + * this function does not clear error status of the address space. + * + * Use this function if callers don't handle errors themselves. Expected + * call sites are system-wide / filesystem-wide data flushers: e.g. sync(2), + * fsfreeze(8) + */ +int filemap_fdatawait_range_keep_errors(struct address_space *mapping, + loff_t start_byte, loff_t end_byte) +{ + __filemap_fdatawait_range(mapping, start_byte, end_byte); + return filemap_check_and_keep_errors(mapping); +} +EXPORT_SYMBOL(filemap_fdatawait_range_keep_errors); + +/** * file_fdatawait_range - wait for writeback to complete * @file: file pointing to address space structure to wait for * @start_byte: offset in bytes where the range starts