diff options
| author | Toshi Kani <[email protected]> | 2016-05-10 10:23:55 -0600 |
|---|---|---|
| committer | Vishal Verma <[email protected]> | 2016-05-17 00:44:12 -0600 |
| commit | 284854be2b85e967d17c098a1d4c176b5cd37eb3 (patch) | |
| tree | fd74304392cdee3e5bfd5de05a69599220e7ec8c | |
| parent | 87eefeb4e80b1526be83e670a08d059a003b7d0e (diff) | |
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 <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Ross Zwisler <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Boaz Harrosh <[email protected]>
Signed-off-by: Vishal Verma <[email protected]>
| -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.. */ |