IB/mad: Return error response for unsupported MADs
Set up a response with appropriate error status and send it for MADs
that are not supported by a specific class/version.
Reviewed-by: Hal Rosenstock <hal@mellanox.com>
Signed-off-by: Swapna Thete <swapna.thete@qlogic.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
diff --git a/drivers/infiniband/core/mad.c b/drivers/infiniband/core/mad.c
index 2fe428b..426bb76 100644
--- a/drivers/infiniband/core/mad.c
+++ b/drivers/infiniband/core/mad.c
@@ -1842,6 +1842,24 @@
}
}
+static bool generate_unmatched_resp(struct ib_mad_private *recv,
+ struct ib_mad_private *response)
+{
+ if (recv->mad.mad.mad_hdr.method == IB_MGMT_METHOD_GET ||
+ recv->mad.mad.mad_hdr.method == IB_MGMT_METHOD_SET) {
+ memcpy(response, recv, sizeof *response);
+ response->header.recv_wc.wc = &response->header.wc;
+ response->header.recv_wc.recv_buf.mad = &response->mad.mad;
+ response->header.recv_wc.recv_buf.grh = &response->grh;
+ response->mad.mad.mad_hdr.method = IB_MGMT_METHOD_GET_RESP;
+ response->mad.mad.mad_hdr.status =
+ cpu_to_be16(IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB);
+
+ return true;
+ } else {
+ return false;
+ }
+}
static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv,
struct ib_wc *wc)
{
@@ -1963,6 +1981,9 @@
* or via recv_handler in ib_mad_complete_recv()
*/
recv = NULL;
+ } else if (generate_unmatched_resp(recv, response)) {
+ agent_send_response(&response->mad.mad, &recv->grh, wc,
+ port_priv->device, port_num, qp_info->qp->qp_num);
}
out: