From patchwork Mon Nov 29 10:21:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12644079 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 357CBC433EF for ; Mon, 29 Nov 2021 10:40:17 +0000 (UTC) Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-498-4krFhol3Nx2EcRUf6mYwyA-1; Mon, 29 Nov 2021 05:40:14 -0500 X-MC-Unique: 4krFhol3Nx2EcRUf6mYwyA-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 85FC584B9A2; Mon, 29 Nov 2021 10:40:10 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 6D4795D9C0; Mon, 29 Nov 2021 10:40:10 +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 438374A706; Mon, 29 Nov 2021 10:40:10 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 1ATAe8oZ014504 for ; Mon, 29 Nov 2021 05:40:09 -0500 Received: by smtp.corp.redhat.com (Postfix) id CBEFB2026D69; Mon, 29 Nov 2021 10:40:08 +0000 (UTC) Received: from mimecast-mx02.redhat.com (mimecast02.extmail.prod.ext.rdu2.redhat.com [10.11.55.18]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C7DB92026D5D for ; Mon, 29 Nov 2021 10:40:02 +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-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id BC4238007B1 for ; Mon, 29 Nov 2021 10:40:02 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-56-X4sf-OHeM0qTUBS_pGBKsA-1; Mon, 29 Nov 2021 05:40:00 -0500 X-MC-Unique: X4sf-OHeM0qTUBS_pGBKsA-1 Received: from [2001:4bb8:184:4a23:724a:c057:c7bf:4643] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1mrdnm-0073Qh-SZ; Mon, 29 Nov 2021 10:22:28 +0000 From: Christoph Hellwig To: Dan Williams Date: Mon, 29 Nov 2021 11:21:51 +0100 Message-Id: <20211129102203.2243509-18-hch@lst.de> In-Reply-To: <20211129102203.2243509-1-hch@lst.de> References: <20211129102203.2243509-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-loop: dm-devel@redhat.com Cc: nvdimm@lists.linux.dev, Mike Snitzer , linux-s390@vger.kernel.org, linux-erofs@lists.ozlabs.org, virtualization@lists.linux-foundation.org, linux-xfs@vger.kernel.org, dm-devel@redhat.com, "Darrick J . Wong" , linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, Ira Weiny Subject: [dm-devel] [PATCH 17/29] fsdax: factor out a dax_memzero helper 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 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Factor out a helper for the "manual" zeroing of a DAX range to clean up dax_iomap_zero a lot. Signed-off-by: Christoph Hellwig Reviewed-by: Dan Williams Reviewed-by: Darrick J. Wong --- fs/dax.c | 36 +++++++++++++++++++----------------- 1 file changed, 19 insertions(+), 17 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index d7a923d152240..d5db1297a0bb6 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -1121,34 +1121,36 @@ static vm_fault_t dax_pmd_load_hole(struct xa_state *xas, struct vm_fault *vmf, } #endif /* CONFIG_FS_DAX_PMD */ +static int dax_memzero(struct dax_device *dax_dev, pgoff_t pgoff, + unsigned int offset, size_t size) +{ + void *kaddr; + long ret; + + ret = dax_direct_access(dax_dev, pgoff, 1, &kaddr, NULL); + if (ret > 0) { + memset(kaddr + offset, 0, size); + dax_flush(dax_dev, kaddr + offset, size); + } + return ret; +} + s64 dax_iomap_zero(loff_t pos, u64 length, struct iomap *iomap) { pgoff_t pgoff = dax_iomap_pgoff(iomap, pos); long rc, id; - void *kaddr; - bool page_aligned = false; unsigned offset = offset_in_page(pos); unsigned size = min_t(u64, PAGE_SIZE - offset, length); - if (IS_ALIGNED(pos, PAGE_SIZE) && size == PAGE_SIZE) - page_aligned = true; - id = dax_read_lock(); - - if (page_aligned) + if (IS_ALIGNED(pos, PAGE_SIZE) && size == PAGE_SIZE) rc = dax_zero_page_range(iomap->dax_dev, pgoff, 1); else - rc = dax_direct_access(iomap->dax_dev, pgoff, 1, &kaddr, NULL); - if (rc < 0) { - dax_read_unlock(id); - return rc; - } - - if (!page_aligned) { - memset(kaddr + offset, 0, size); - dax_flush(iomap->dax_dev, kaddr + offset, size); - } + rc = dax_memzero(iomap->dax_dev, pgoff, offset, size); dax_read_unlock(id); + + if (rc < 0) + return rc; return size; }