From patchwork Fri Aug 7 19:55:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vivek Goyal X-Patchwork-Id: 11706021 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 16215138C for ; Fri, 7 Aug 2020 19:56:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EEB6022CA1 for ; Fri, 7 Aug 2020 19:56:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="OEtcWCE8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727768AbgHGT4U (ORCPT ); Fri, 7 Aug 2020 15:56:20 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:53020 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726985AbgHGTz4 (ORCPT ); Fri, 7 Aug 2020 15:55:56 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1596830155; 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=qdlNr90CBeIrDZm/k8M3WSYgAxr0kUHBQSfXY3HBR3M=; b=OEtcWCE8O5fZ4rbGITleBlsU0WLxb7Ef7hxXcd01DHmtitoBa3RrwXzJ2bSNVOSz8WIaAE NlVvekfuoTCWwJJjrf+rsMOUKqg4bk51ghjCsDLtUr1lYF4hBcP6eWW058k/9+i7ek5DNs bTG07R6oi+v53wt4Nr0zM8gLhCGCv0g= 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-456-fTI0CLrNPD-IHN_fsiNHLQ-1; Fri, 07 Aug 2020 15:55:53 -0400 X-MC-Unique: fTI0CLrNPD-IHN_fsiNHLQ-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 8351A1005510; Fri, 7 Aug 2020 19:55:52 +0000 (UTC) Received: from horse.redhat.com (ovpn-113-142.rdu2.redhat.com [10.10.113.142]) by smtp.corp.redhat.com (Postfix) with ESMTP id 60A975C1D0; Fri, 7 Aug 2020 19:55:52 +0000 (UTC) Received: by horse.redhat.com (Postfix, from userid 10451) id 19357222E5E; Fri, 7 Aug 2020 15:55:39 -0400 (EDT) From: Vivek Goyal To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, virtio-fs@redhat.com Cc: vgoyal@redhat.com, miklos@szeredi.hu, stefanha@redhat.com, dgilbert@redhat.com Subject: [PATCH v2 16/20] fuse,virtiofs: Define dax address space operations Date: Fri, 7 Aug 2020 15:55:22 -0400 Message-Id: <20200807195526.426056-17-vgoyal@redhat.com> In-Reply-To: <20200807195526.426056-1-vgoyal@redhat.com> References: <20200807195526.426056-1-vgoyal@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 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 00ad27216cc3..54708cb24da0 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) { @@ -4030,6 +4040,13 @@ 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); @@ -4045,6 +4062,8 @@ 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; + } }