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| author | Toshi Kani <toshi.kani@hpe.com> | 2016-05-10 10:23:55 -0600 |
|---|---|---|
| committer | Vishal Verma <vishal.l.verma@intel.com> | 2016-05-17 00:44:12 -0600 |
| commit | 284854be2b85e967d17c098a1d4c176b5cd37eb3 (patch) | |
| tree | fd74304392cdee3e5bfd5de05a69599220e7ec8c /fs/ext2/super.c | |
| parent | 87eefeb4e80b1526be83e670a08d059a003b7d0e (diff) | |
| download | linux-284854be2b85e967d17c098a1d4c176b5cd37eb3.tar.gz linux-284854be2b85e967d17c098a1d4c176b5cd37eb3.tar.bz2 linux-284854be2b85e967d17c098a1d4c176b5cd37eb3.zip | |
ext2: Add alignment check for DAX mount
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_dax_supported() to perform proper precondition checks
which includes this partition alignment check.
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Jan Kara <jack@suse.cz>
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>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Diffstat (limited to 'fs/ext2/super.c')
| -rw-r--r-- | fs/ext2/super.c | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/fs/ext2/super.c b/fs/ext2/super.c index b78caf25f746..1d9379568aa8 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -922,16 +922,9 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) blocksize = BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); if (sbi->s_mount_opt & EXT2_MOUNT_DAX) { - if (blocksize != PAGE_SIZE) { - ext2_msg(sb, KERN_ERR, - "error: unsupported blocksize for dax"); + err = bdev_dax_supported(sb, blocksize); + if (err) goto failed_mount; - } - if (!sb->s_bdev->bd_disk->fops->direct_access) { - ext2_msg(sb, KERN_ERR, - "error: device does not support dax"); - goto failed_mount; - } } /* If the blocksize doesn't match, re-read the thing.. */ |