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: 11412775 X-Patchwork-Delegate: snitzer@redhat.com 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 D7A9C1871 for ; Fri, 28 Feb 2020 16:35:25 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [205.139.110.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 44814246B9 for ; Fri, 28 Feb 2020 16:35:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="D5W9SBzo" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 44814246B9 Authentication-Results: mail.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=dm-devel-bounces@redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1582907724; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-unsubscribe:list-subscribe:list-post; bh=msgzQ21kSGLTsnzWy0TC08Zai98M5tacJKqgbdRkUyE=; b=D5W9SBzonhEQbtoVpXcYrwshbKutl977w4nMijtPG5hkzF1gkNKk2sJ5XUlLu88U6IrlvK SM4yFOM3HGbdDwPR2cV5AET4rCrj7iLR53QTzRWY0fXCuzEFthNCwdLoN8WGNw9RuendPz quSuOhNG6yhc9GhzYmGMd0awj19YVOI= 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-270-ARkxM4zWPwuZl0pgKTPnig-1; Fri, 28 Feb 2020 11:35:22 -0500 X-MC-Unique: ARkxM4zWPwuZl0pgKTPnig-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 CF5441034B37; Fri, 28 Feb 2020 16:35:15 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 741618681F; Fri, 28 Feb 2020 16:35:15 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id BE0D318089CE; Fri, 28 Feb 2020 16:35:14 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 01SGZDAs005202 for ; Fri, 28 Feb 2020 11:35:13 -0500 Received: by smtp.corp.redhat.com (Postfix) id EAC6C5DA81; Fri, 28 Feb 2020 16:35:13 +0000 (UTC) Delivered-To: dm-devel@redhat.com 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 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 X-loop: dm-devel@redhat.com Cc: linux-s390@vger.kernel.org, david@fromorbit.com, dm-devel@redhat.com, jmoyer@redhat.com, vgoyal@redhat.com, Gerald Schaefer Subject: [dm-devel] [PATCH v6 3/6] s390, dcssblk, dax: Add dax zero_page_range operation to dcssblk driver X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com 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 {