From patchwork Wed May 15 19:27:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vivek Goyal X-Patchwork-Id: 10945225 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 8B636933 for ; Wed, 15 May 2019 19:30:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7A6F92862D for ; Wed, 15 May 2019 19:30:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6B48B28609; Wed, 15 May 2019 19:30:24 +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=ham 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 1ACFF28609 for ; Wed, 15 May 2019 19:30:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727671AbfEOT1e (ORCPT ); Wed, 15 May 2019 15:27:34 -0400 Received: from mx1.redhat.com ([209.132.183.28]:53894 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727578AbfEOT1e (ORCPT ); Wed, 15 May 2019 15:27:34 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id D84653004412; Wed, 15 May 2019 19:27:33 +0000 (UTC) Received: from horse.redhat.com (unknown [10.18.25.29]) by smtp.corp.redhat.com (Postfix) with ESMTP id B45E51001DEF; Wed, 15 May 2019 19:27:33 +0000 (UTC) Received: by horse.redhat.com (Postfix, from userid 10451) id 00FA422548B; Wed, 15 May 2019 15:27:29 -0400 (EDT) From: Vivek Goyal To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-nvdimm@lists.01.org Cc: vgoyal@redhat.com, miklos@szeredi.hu, stefanha@redhat.com, dgilbert@redhat.com, swhiteho@redhat.com Subject: [PATCH v2 23/30] fuse: Define dax address space operations Date: Wed, 15 May 2019 15:27:08 -0400 Message-Id: <20190515192715.18000-24-vgoyal@redhat.com> In-Reply-To: <20190515192715.18000-1-vgoyal@redhat.com> References: <20190515192715.18000-1-vgoyal@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.44]); Wed, 15 May 2019 19:27:33 +0000 (UTC) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This is done along the lines of ext4 and xfs. I primarily wanted ->writepages hook at this time so that I could call into dax_writeback_mapping_range(). This in turn will decide which pfns need to be written back. Signed-off-by: Vivek Goyal --- fs/fuse/file.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/fs/fuse/file.c b/fs/fuse/file.c index a053bcb9498d..2777355bc245 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -2402,6 +2402,17 @@ static int fuse_writepages_fill(struct page *page, return err; } +static int fuse_dax_writepages(struct address_space *mapping, + struct writeback_control *wbc) +{ + + struct inode *inode = mapping->host; + struct fuse_conn *fc = get_fuse_conn(inode); + + return dax_writeback_mapping_range(mapping, + NULL, fc->dax_dev, wbc); +} + static int fuse_writepages(struct address_space *mapping, struct writeback_control *wbc) { @@ -3707,6 +3718,13 @@ static const struct address_space_operations fuse_file_aops = { .write_end = fuse_write_end, }; +static const struct address_space_operations fuse_dax_file_aops = { + .writepages = fuse_dax_writepages, + .direct_IO = noop_direct_IO, + .set_page_dirty = noop_set_page_dirty, + .invalidatepage = noop_invalidatepage, +}; + void fuse_init_file_inode(struct inode *inode) { struct fuse_inode *fi = get_fuse_inode(inode); @@ -3724,5 +3742,6 @@ void fuse_init_file_inode(struct inode *inode) if (fc->dax_dev) { inode->i_flags |= S_DAX; + inode->i_data.a_ops = &fuse_dax_file_aops; } }