From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758029AbcEFAi6 (ORCPT ); Thu, 5 May 2016 20:38:58 -0400 Received: from g1t5424.austin.hp.com ([15.216.225.54]:38220 "EHLO g1t5424.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756087AbcEFAiz (ORCPT ); Thu, 5 May 2016 20:38:55 -0400 From: Toshi Kani To: dan.j.williams@intel.com, jack@suse.cz, david@fromorbit.com, viro@zeniv.linux.org.uk Cc: axboe@fb.com, hch@infradead.org, boaz@plexistor.com, tytso@mit.edu, adilger.kernel@dilger.ca, ross.zwisler@linux.intel.com, toshi.kani@hpe.com, micah.parrish@hpe.com, linux-nvdimm@ml01.01.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 0/5] Add alignment check for DAX mount Date: Thu, 5 May 2016 18:29:51 -0600 Message-Id: <1462494596-20938-1-git-send-email-toshi.kani@hpe.com> X-Mailer: git-send-email 2.5.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When a partition is not aligned by 4KB, mount -o dax succeeds, but any read/write access to the filesystem fails, except for metadata update. Add alignment check to ext4, ext2, and xfs. - Patch 1-2 add bdev_supports_dax() which performs all the checks necessary for dax mount. - Patch 3-5 change fillesystems to call bdev_supports_dax(). v3: - Remove boilerplate code from filesytems (Christoph Hellwig) - Add a helper function to perform all checks (Dave Chinner) v2: - Use a helper function via ->direct_access for the check. (Christoph Hellwig) - Call bdev_direct_access() with sector 0 for the check. (Boaz Harrosh) --- Toshi Kani (5): 1/5 block: Add vfs_msg() interface 2/5 block: Add bdev_supports_dax() for dax mount checks 3/5 ext4: Add alignment check for DAX mount 4/5 ext2: Add alignment check for DAX mount 5/5 xfs: Add alignment check for DAX mount --- fs/block_dev.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++ fs/ext2/super.c | 11 ++-------- fs/ext4/super.c | 11 ++-------- fs/xfs/xfs_super.c | 12 +++++------ include/linux/blkdev.h | 12 +++++++++++ 5 files changed, 75 insertions(+), 25 deletions(-)