On Thu, Oct 25, 2018 at 05:51:47PM -0400, Olga Kornievskaia wrote: > - if (file_in->f_inode->i_sb != file_out->f_inode->i_sb) > + if (file_in->f_inode->i_sb->s_type != file_out->f_inode->i_sb->s_type) Isn't it simpler to do: if (file_in->f_inode->i_sb->s_type != &nfs4_fs_type) But now I've done some grepping, and I wonder whether it's possible / desirable to also copy between inodes on a nfs4_remote_fs_type, nfs4_remote_referral_fs_type, nfs4_referral_fs_type or nfs4_xdev_fs_type. I haven't kept up with NFS development for a while, so maybe none of those are possible.
