From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f69.google.com (mail-pg0-f69.google.com [74.125.83.69]) by kanga.kvack.org (Postfix) with ESMTP id DA3C66B026B for ; Fri, 6 Oct 2017 18:42:37 -0400 (EDT) Received: by mail-pg0-f69.google.com with SMTP id c137so38850019pga.6 for ; Fri, 06 Oct 2017 15:42:37 -0700 (PDT) Received: from mga05.intel.com (mga05.intel.com. [192.55.52.43]) by mx.google.com with ESMTPS id z11si483351plo.149.2017.10.06.15.42.36 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 06 Oct 2017 15:42:36 -0700 (PDT) Subject: [PATCH v7 10/12] device-dax: wire up ->lease_direct() From: Dan Williams 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> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: 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 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); -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org