From patchwork Fri Oct 6 22:36:11 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 9990681 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 312A860244 for ; Fri, 6 Oct 2017 22:42:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 22F5B28E14 for ; Fri, 6 Oct 2017 22:42:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 181BB28E48; Fri, 6 Oct 2017 22:42:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BF07628E14 for ; Fri, 6 Oct 2017 22:42:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752986AbdJFWmi (ORCPT ); Fri, 6 Oct 2017 18:42:38 -0400 Received: from mga07.intel.com ([134.134.136.100]:31653 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752870AbdJFWmh (ORCPT ); Fri, 6 Oct 2017 18:42:37 -0400 Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga105.jf.intel.com with ESMTP; 06 Oct 2017 15:42:36 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.42,486,1500966000"; d="scan'208";a="907572696" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.125]) by FMSMGA003.fm.intel.com with ESMTP; 06 Oct 2017 15:42:35 -0700 Subject: [PATCH v7 10/12] device-dax: wire up ->lease_direct() From: Dan Williams To: linux-nvdimm@lists.01.org Cc: Jan Kara , linux-rdma@vger.kernel.org, linux-api@vger.kernel.org, linux-xfs@vger.kernel.org, linux-mm@kvack.org, Jeff Moyer , linux-fsdevel@vger.kernel.org, Ross Zwisler , Christoph Hellwig Date: Fri, 06 Oct 2017 15:36:11 -0700 Message-ID: <150732937143.22363.13161962109863846755.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <150732931273.22363.8436792888326501071.stgit@dwillia2-desk3.amr.corp.intel.com> References: <150732931273.22363.8436792888326501071.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.17.1-9-g687f MIME-Version: 1.0 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The only event that will break a lease_direct lease in the device-dax case is the device shutdown path where the physical pages might get assigned to another device. Cc: Jan Kara Cc: Jeff Moyer Cc: Christoph Hellwig Cc: Ross Zwisler Signed-off-by: Dan Williams --- drivers/dax/device.c | 4 ++++ fs/Kconfig | 4 ++++ fs/Makefile | 3 ++- include/linux/mapdirect.h | 2 +- 4 files changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/dax/device.c b/drivers/dax/device.c index e9f3b3e4bbf4..fa75004185c4 100644 --- a/drivers/dax/device.c +++ b/drivers/dax/device.c @@ -10,6 +10,7 @@ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. */ +#include #include #include #include @@ -430,6 +431,7 @@ static int dev_dax_fault(struct vm_fault *vmf) static const struct vm_operations_struct dax_vm_ops = { .fault = dev_dax_fault, .huge_fault = dev_dax_huge_fault, + .lease_direct = map_direct_lease, }; static int dax_mmap(struct file *filp, struct vm_area_struct *vma) @@ -540,8 +542,10 @@ static void kill_dev_dax(struct dev_dax *dev_dax) { struct dax_device *dax_dev = dev_dax->dax_dev; struct inode *inode = dax_inode(dax_dev); + const bool wait = true; kill_dax(dax_dev); + break_layout(inode, wait); unmap_mapping_range(inode->i_mapping, 0, 0, 1); } diff --git a/fs/Kconfig b/fs/Kconfig index 7aee6d699fd6..2e3784ae1bc4 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -58,6 +58,10 @@ config FS_DAX_PMD depends on ZONE_DEVICE depends on TRANSPARENT_HUGEPAGE +config DAX_MAP_DIRECT + bool + default FS_DAX || DEV_DAX + endif # BLOCK # Posix ACL utility routines diff --git a/fs/Makefile b/fs/Makefile index c0e791d235d8..21b8fb104656 100644 --- a/fs/Makefile +++ b/fs/Makefile @@ -29,7 +29,8 @@ obj-$(CONFIG_TIMERFD) += timerfd.o obj-$(CONFIG_EVENTFD) += eventfd.o obj-$(CONFIG_USERFAULTFD) += userfaultfd.o obj-$(CONFIG_AIO) += aio.o -obj-$(CONFIG_FS_DAX) += dax.o mapdirect.o +obj-$(CONFIG_FS_DAX) += dax.o +obj-$(CONFIG_DAX_MAP_DIRECT) += mapdirect.o obj-$(CONFIG_FS_ENCRYPTION) += crypto/ obj-$(CONFIG_FILE_LOCKING) += locks.o obj-$(CONFIG_COMPAT) += compat.o compat_ioctl.o diff --git a/include/linux/mapdirect.h b/include/linux/mapdirect.h index dc4d4ba677d0..bafa78a6085f 100644 --- a/include/linux/mapdirect.h +++ b/include/linux/mapdirect.h @@ -26,7 +26,7 @@ struct lease_direct { struct lease_direct_state *lds; }; -#if IS_ENABLED(CONFIG_FS_DAX) +#if IS_ENABLED(CONFIG_DAX_MAP_DIRECT) struct map_direct_state *map_direct_register(int fd, struct vm_area_struct *vma); int put_map_direct_vma(struct map_direct_state *mds); void get_map_direct_vma(struct map_direct_state *mds);