From patchwork Wed Feb 12 17:07:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vivek Goyal X-Patchwork-Id: 11378823 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 398211922 for ; Wed, 12 Feb 2020 17:08:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C878C2168B for ; Wed, 12 Feb 2020 17:08:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="BIeKNJE9" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728731AbgBLRIA (ORCPT ); Wed, 12 Feb 2020 12:08:00 -0500 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:22847 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728410AbgBLRH6 (ORCPT ); Wed, 12 Feb 2020 12:07:58 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1581527277; 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=0QSDN4zqZX6JQThUAoXPpSXd0mGJ9FYDGlAgc1x+IyE=; b=BIeKNJE9IH21MlTFoU8IdIDKPcwHbeI0WbdzAR6xD2Vf7bcsWaUkM4t/nTX+M8ykSagalO wwF79z5PFVHeLR8CuBnZDAGyvPJtouL6cAZNNa+4ARyMhgfBeTbgJTQPN7XZBw+dIyJeRP uKOWXOf5rv0wNGekUchZ65qbLnyTXuI= 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-273-k3JbxwhlOA2CwoxrbWTETw-1; Wed, 12 Feb 2020 12:07:51 -0500 X-MC-Unique: k3JbxwhlOA2CwoxrbWTETw-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 0B7008017CC; Wed, 12 Feb 2020 17:07:50 +0000 (UTC) Received: from horse.redhat.com (unknown [10.18.25.35]) by smtp.corp.redhat.com (Postfix) with ESMTP id 20668388; Wed, 12 Feb 2020 17:07:47 +0000 (UTC) Received: by horse.redhat.com (Postfix, from userid 10451) id AEE932257D3; Wed, 12 Feb 2020 12:07:46 -0500 (EST) From: Vivek Goyal To: linux-fsdevel@vger.kernel.org, linux-nvdimm@lists.01.org, dan.j.williams@intel.com, hch@infradead.org Cc: vgoyal@redhat.com, dm-devel@redhat.com, jack@suse.cz Subject: [PATCH 1/6] dax: Define a helper dax_pgoff() which takes in dax_offset as argument Date: Wed, 12 Feb 2020 12:07:28 -0500 Message-Id: <20200212170733.8092-2-vgoyal@redhat.com> In-Reply-To: <20200212170733.8092-1-vgoyal@redhat.com> References: <20200212170733.8092-1-vgoyal@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Create a new helper dax_pgoff() which will replace bdev_dax_pgoff(). Difference between two is that dax_pgoff() takes in "sector_t dax_offset" as an argument instead of "struct block_device". dax_offset specifies any offset into dax device which should be added to sector while calculating pgoff. Signed-off-by: Vivek Goyal --- drivers/dax/super.c | 12 ++++++++++++ include/linux/dax.h | 1 + 2 files changed, 13 insertions(+) diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 0aa4b6bc5101..e9daa30e4250 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -56,6 +56,18 @@ int bdev_dax_pgoff(struct block_device *bdev, sector_t sector, size_t size, } EXPORT_SYMBOL(bdev_dax_pgoff); +int dax_pgoff(sector_t dax_offset, sector_t sector, size_t size, pgoff_t *pgoff) +{ + phys_addr_t phys_off = (dax_offset + sector) * 512; + + if (pgoff) + *pgoff = PHYS_PFN(phys_off); + if (phys_off % PAGE_SIZE || size % PAGE_SIZE) + return -EINVAL; + return 0; +} +EXPORT_SYMBOL(dax_pgoff); + #if IS_ENABLED(CONFIG_FS_DAX) struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev) { diff --git a/include/linux/dax.h b/include/linux/dax.h index 328c2dbb4409..5101a4b5c1f9 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -111,6 +111,7 @@ static inline bool daxdev_mapping_supported(struct vm_area_struct *vma, struct writeback_control; int bdev_dax_pgoff(struct block_device *, sector_t, size_t, pgoff_t *pgoff); +int dax_pgoff(sector_t dax_offset, sector_t, size_t, pgoff_t *pgoff); #if IS_ENABLED(CONFIG_FS_DAX) bool __bdev_dax_supported(struct block_device *bdev, int blocksize); static inline bool bdev_dax_supported(struct block_device *bdev, int blocksize)