From patchwork Fri Feb 28 16:34:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vivek Goyal X-Patchwork-Id: 11412759 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 65725138D for ; Fri, 28 Feb 2020 16:35:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 44DB8246BA for ; Fri, 28 Feb 2020 16:35:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="SuZxFduz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726536AbgB1QfU (ORCPT ); Fri, 28 Feb 2020 11:35:20 -0500 Received: from us-smtp-1.mimecast.com ([205.139.110.61]:57922 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725805AbgB1QfU (ORCPT ); Fri, 28 Feb 2020 11:35:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1582907719; 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=XTanuHOyQwvPVyidmZKXd8IbWyhZm0ECw7LNYOxssqY=; b=SuZxFduzZXkXbiZnIlCIiGN2ytX7q4UiY8di7hHvS1OH3jmADwKZo4kLoRsHTiNd7Fb6cG DEWOvISbXU/5GKd0ffQ3c71N9ikNNecy9u2shrALwLsv8xa3eSdy8gu3ir9GRaPPlC35Fc Tb/cyRKZWXsZf4bX2qWv+NbOMaotYsU= 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-226-iKngdN3BMPamfLCyAJ56CQ-1; Fri, 28 Feb 2020 11:35:15 -0500 X-MC-Unique: iKngdN3BMPamfLCyAJ56CQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id EDFEC1005513; Fri, 28 Feb 2020 16:35:13 +0000 (UTC) Received: from horse.redhat.com (unknown [10.18.25.35]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4A5775D9CD; Fri, 28 Feb 2020 16:35:11 +0000 (UTC) Received: by horse.redhat.com (Postfix, from userid 10451) id CB59C2257D5; Fri, 28 Feb 2020 11:35:10 -0500 (EST) From: Vivek Goyal To: linux-fsdevel@vger.kernel.org, linux-nvdimm@lists.01.org, hch@infradead.org, dan.j.williams@intel.com Cc: vgoyal@redhat.com, david@fromorbit.com, jmoyer@redhat.com, dm-devel@redhat.com, linux-s390@vger.kernel.org, Gerald Schaefer Subject: [PATCH v6 3/6] s390,dcssblk,dax: Add dax zero_page_range operation to dcssblk driver Date: Fri, 28 Feb 2020 11:34:53 -0500 Message-Id: <20200228163456.1587-4-vgoyal@redhat.com> In-Reply-To: <20200228163456.1587-1-vgoyal@redhat.com> References: <20200228163456.1587-1-vgoyal@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Add dax operation zero_page_range for dcssblk driver. CC: linux-s390@vger.kernel.org Suggested-by: Christoph Hellwig Reviewed-by: Gerald Schaefer Signed-off-by: Vivek Goyal --- drivers/s390/block/dcssblk.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index 63502ca537eb..ab3e2898816c 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -57,11 +57,26 @@ static size_t dcssblk_dax_copy_to_iter(struct dax_device *dax_dev, return copy_to_iter(addr, bytes, i); } +static int dcssblk_dax_zero_page_range(struct dax_device *dax_dev, + pgoff_t pgoff, size_t nr_pages) +{ + long rc; + void *kaddr; + + rc = dax_direct_access(dax_dev, pgoff, nr_pages, &kaddr, NULL); + if (rc < 0) + return rc; + memset(kaddr, 0, nr_pages << PAGE_SHIFT); + dax_flush(dax_dev, kaddr, nr_pages << PAGE_SHIFT); + return 0; +} + static const struct dax_operations dcssblk_dax_ops = { .direct_access = dcssblk_dax_direct_access, .dax_supported = generic_fsdax_supported, .copy_from_iter = dcssblk_dax_copy_from_iter, .copy_to_iter = dcssblk_dax_copy_to_iter, + .zero_page_range = dcssblk_dax_zero_page_range, }; struct dcssblk_dev_info {