From patchwork Wed Aug 19 22:19:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vivek Goyal X-Patchwork-Id: 11725131 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8C8341392 for ; Wed, 19 Aug 2020 22:21:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 73B382076E for ; Wed, 19 Aug 2020 22:21:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="HnNsMYqH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727969AbgHSWVg (ORCPT ); Wed, 19 Aug 2020 18:21:36 -0400 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:48852 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727920AbgHSWVP (ORCPT ); Wed, 19 Aug 2020 18:21:15 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1597875672; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=a8Fv9LTgyRB5SSl/Lk6ZNgWdBq14YjztlZgeO1B398g=; b=HnNsMYqH0gezBu7EPLrqUnB5lo3XULjuSsYuWTI2eqmB5eqAeJDI7RxehJ5H3nJ7/iTZs5 UvtHwitWSfgLHKVMIBnuIbXTpogybLLZ3H8uQDxWDHIS0T73sfIC69wTUuC38jgVzzE8a2 fdf7K48VFh5SKHsV93Zw2qhXoRyVpZI= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-473-gPsvGkkkNICwda23EDgoVg-1; Wed, 19 Aug 2020 18:21:03 -0400 X-MC-Unique: gPsvGkkkNICwda23EDgoVg-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 276FD425D2; Wed, 19 Aug 2020 22:21:02 +0000 (UTC) Received: from horse.redhat.com (ovpn-115-197.rdu2.redhat.com [10.10.115.197]) by smtp.corp.redhat.com (Postfix) with ESMTP id 04FDC7E303; Wed, 19 Aug 2020 22:21:02 +0000 (UTC) Received: by horse.redhat.com (Postfix, from userid 10451) id 2B19C2256ED; Wed, 19 Aug 2020 18:20:54 -0400 (EDT) From: Vivek Goyal To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, virtio-fs@redhat.com Cc: vgoyal@redhat.com, miklos@szeredi.hu, stefanha@redhat.com, dgilbert@redhat.com, dan.j.williams@intel.com Subject: [PATCH v3 15/18] fuse,virtiofs: Define dax address space operations Date: Wed, 19 Aug 2020 18:19:53 -0400 Message-Id: <20200819221956.845195-16-vgoyal@redhat.com> In-Reply-To: <20200819221956.845195-1-vgoyal@redhat.com> References: <20200819221956.845195-1-vgoyal@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org 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 | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/fs/fuse/file.c b/fs/fuse/file.c index f1ad8b95b546..0eecb4097c14 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -2669,6 +2669,16 @@ 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, fc->dax_dev, wbc); +} + static int fuse_writepages(struct address_space *mapping, struct writeback_control *wbc) { @@ -4021,6 +4031,13 @@ 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); @@ -4036,6 +4053,8 @@ void fuse_init_file_inode(struct inode *inode) fi->writepages = RB_ROOT; fi->dmap_tree = RB_ROOT_CACHED; - if (fc->dax_dev) + if (fc->dax_dev) { inode->i_flags |= S_DAX; + inode->i_data.a_ops = &fuse_dax_file_aops; + } }