Commit 361d24d4 authored by Eric Sandeen's avatar Eric Sandeen Committed by Theodore Ts'o
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ext4: hard fail dax mount on unsupported devices 



As dax inches closer to production use, an administrator should not
be surprised by silently disabling the feature they asked for.

Signed-off-by: default avatarEric Sandeen <sandeen@sandeen.net>
Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
parent 32ea2750

fs/ext4/super.c

+3 −3
Original line number Diff line number Diff line
@@ -3864,12 +3864,12 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) 
		if (ext4_has_feature_inline_data(sb)) {

			ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem"

					" that may contain inline data");

			sbi->s_mount_opt &= ~EXT4_MOUNT_DAX;

			goto failed_mount;

		}

		if (!bdev_dax_supported(sb->s_bdev, blocksize)) {

			ext4_msg(sb, KERN_ERR,

				"DAX unsupported by block device. Turning off DAX.");

			sbi->s_mount_opt &= ~EXT4_MOUNT_DAX;

				"DAX unsupported by block device.");

			goto failed_mount;

		}

	}