From: Toshi Kani <toshi.kani@hpe.com>
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 5/5] xfs: Add alignment check for DAX mount
Date: Thu, 5 May 2016 18:29:56 -0600 [thread overview]
Message-ID: <1462494596-20938-6-git-send-email-toshi.kani@hpe.com> (raw)
In-Reply-To: <1462494596-20938-1-git-send-email-toshi.kani@hpe.com>
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.
Call bdev_supports_dax() to perform proper precondition checks
which includes this partition alignment check.
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Boaz Harrosh <boaz@plexistor.com>
---
fs/xfs/xfs_super.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 187e14b..cc177da 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1558,14 +1558,12 @@ xfs_fs_fill_super(
if (mp->m_flags & XFS_MOUNT_DAX) {
xfs_warn(mp,
- "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
- if (sb->s_blocksize != PAGE_SIZE) {
- xfs_alert(mp,
- "Filesystem block size invalid for DAX Turning DAX off.");
- mp->m_flags &= ~XFS_MOUNT_DAX;
- } else if (!sb->s_bdev->bd_disk->fops->direct_access) {
+ "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
+
+ error = bdev_supports_dax(sb, sb->s_blocksize);
+ if (error) {
xfs_alert(mp,
- "Block device does not support DAX Turning DAX off.");
+ "DAX unsupported by block device. Turning off DAX.");
mp->m_flags &= ~XFS_MOUNT_DAX;
}
}
next prev parent reply other threads:[~2016-05-06 0:39 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-06 0:29 [PATCH v3 0/5] Add alignment check for DAX mount Toshi Kani
2016-05-06 0:29 ` [PATCH v3 1/5] block: Add vfs_msg() interface Toshi Kani
2016-05-08 8:56 ` Christoph Hellwig
2016-05-06 0:29 ` [PATCH v3 2/5] block: Add bdev_supports_dax() for dax mount checks Toshi Kani
2016-05-08 8:57 ` Christoph Hellwig
2016-05-08 19:14 ` Dan Williams
2016-05-09 18:12 ` Toshi Kani
2016-05-09 18:23 ` Dan Williams
2016-05-09 21:19 ` Dave Chinner
2016-05-09 22:34 ` Toshi Kani
2016-05-09 22:50 ` Toshi Kani
2016-05-06 0:29 ` [PATCH v3 3/5] ext4: Add alignment check for DAX mount Toshi Kani
2016-05-09 8:15 ` Jan Kara
2016-05-06 0:29 ` [PATCH v3 4/5] ext2: " Toshi Kani
2016-05-08 8:59 ` Christoph Hellwig
2016-05-09 8:23 ` Jan Kara
2016-05-09 8:31 ` Jan Kara
2016-05-06 0:29 ` Toshi Kani [this message]
2016-05-08 8:58 ` [PATCH v3 5/5] xfs: " Christoph Hellwig
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