* @task: controlling RPC task
* @xdr: xdr_stream containing RPC Reply header
*
- * On success, @xdr is updated to point past the verifier and
- * zero is returned. Otherwise, @xdr is in an undefined state
- * and a negative errno is returned.
+ * Return values:
+ * %0: Verifier is valid. @xdr now points past the verifier.
+ * %-EIO: Verifier is corrupted or message ended early.
+ * %-EACCES: Verifier is intact but not valid.
+ * %-EPROTONOSUPPORT: Server does not support the requested auth type.
+ *
+ * When a negative errno is returned, @xdr is left in an undefined
+ * state.
*/
int
rpcauth_checkverf(struct rpc_task *task, struct xdr_stream *xdr)
if (*p != rpc_auth_null)
return -EIO;
if (xdr_stream_decode_opaque_inline(xdr, &str, starttls_len) != starttls_len)
- return -EIO;
+ return -EPROTONOSUPPORT;
if (memcmp(str, starttls_token, starttls_len))
- return -EIO;
+ return -EPROTONOSUPPORT;
return 0;
}