From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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@lists.01.org, linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 0/6] Add alignment check for DAX mount Date: Tue, 10 May 2016 10:23:51 -0600 Message-Id: <1462897437-16626-1-git-send-email-toshi.kani@hpe.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 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_dax_supported() which performs all the checks necessary for dax mount. - Patch 3-5 change fillesystems to call bdev_dax_supported(). - Patch 6 is a cleanup to keep dax capability checks consistent. v4: - blkdev_dax_capable() is similar to bdev_dax_supported(). Manage them consistently. (Dan Williams, Dave Chinner) 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 (6): 1/6 block: Add vfs_msg() interface 2/6 block: Add bdev_dax_supported() for dax mount checks 3/6 ext4: Add alignment check for DAX mount 4/6 ext2: Add alignment check for DAX mount 5/6 xfs: Add alignment check for DAX mount 6/6 block: Update blkdev_dax_capable() for consistency --- block/ioctl.c | 30 ---------------- fs/block_dev.c | 96 ++++++++++++++++++++++++++++++++++++++++++++++++-- fs/ext2/super.c | 11 ++---- fs/ext4/super.c | 11 ++---- fs/xfs/xfs_super.c | 12 +++---- include/linux/blkdev.h | 13 +++++++ include/linux/fs.h | 8 ----- 7 files changed, 116 insertions(+), 65 deletions(-)