I'm already working on a diff to decouple fuse from ufs ihash. In the meantime: Make sure the necessary code is compiled in when fuse is enabled in the config.
natano Index: conf/files =================================================================== RCS file: /cvs/src/sys/conf/files,v retrieving revision 1.622 diff -u -p -r1.622 files --- conf/files 5 Aug 2016 19:00:25 -0000 1.622 +++ conf/files 11 Aug 2016 08:31:16 -0000 @@ -896,7 +896,7 @@ file ufs/mfs/mfs_vfsops.c mfs file ufs/mfs/mfs_vnops.c mfs file ufs/ufs/ufs_bmap.c ffs | mfs | ext2fs file ufs/ufs/ufs_dirhash.c ufs_dirhash & (ffs | mfs) -file ufs/ufs/ufs_ihash.c ffs | mfs | ext2fs +file ufs/ufs/ufs_ihash.c ffs | mfs | ext2fs | fuse file ufs/ufs/ufs_inode.c ffs | mfs | ext2fs file ufs/ufs/ufs_lookup.c ffs | mfs | ext2fs file ufs/ufs/ufs_quota.c quota & ( ffs | mfs | ext2fs )