The DAX flag can only be persisted for v3 inodes, so don't allow users to set the flag on older filesystems. Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> --- fs/xfs/xfs_ioctl.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index 9c0c7a9..fa17f89 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -1043,6 +1043,10 @@ xfs_ioctl_setattr_xflags( if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip)) return -EINVAL; + /* Don't allow us to set DAX mode for a non-v3 inode. */ + if ((fa->fsx_xflags & FS_XFLAG_DAX) && ip->i_d.di_version < 3) + return -EINVAL; + /* * Can't modify an immutable/append-only file unless * we have appropriate permission. -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
