vfs_getvfs
while (vfs_getvfs(&tfsid)) {
if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) {
if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)
if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)
mp = vfs_getvfs(&fhp->fh_fsid);
struct mount *vfs_getvfs(fsid_t *);