+ *dentry_ret = dentry;
+ *exp_ret = exp;
+ return 0;
+
+out_nfserr:
+ exp_put(exp);
+ return nfserrno(host_err);
+}
+
+/*
+ * Look up one component of a pathname.
+ * N.B. After this call _both_ fhp and resfh need an fh_put
+ *
+ * If the lookup would cross a mountpoint, and the mounted filesystem
+ * is exported to the client with NFSEXP_NOHIDE, then the lookup is
+ * accepted as it stands and the mounted directory is
+ * returned. Otherwise the covered directory is returned.
+ * NOTE: this mountpoint crossing is not supported properly by all
+ * clients and is explicitly disallowed for NFSv3
+ * NeilBrown <neilb@cse.unsw.edu.au>
+ */
+__be32
+nfsd_lookup(struct svc_rqst *rqstp, struct svc_fh *fhp, const char *name,
+ int len, struct svc_fh *resfh)
+{
+ struct svc_export *exp;
+ struct dentry *dentry;
+ __be32 err;
+
+ err = nfsd_lookup_dentry(rqstp, fhp, name, len, &exp, &dentry);
+ if (err)
+ return err;
+ err = check_nfsd_access(exp, rqstp);
+ if (err)
+ goto out;