- sm->dst_by_src_sw_if_index[sw->sw_if_index] = is_add ? dst_sw_if_index : 0;
- vnet_feature_enable_disable ("device-input", "span-input",
- sw->sw_if_index, is_add, 0, 0);
+ si = vec_elt_at_index (sm->interfaces, src_sw_if_index);
+
+ si->rx_mirror_ports = clib_bitmap_set (si->rx_mirror_ports, dst_sw_if_index,
+ (state & 1) != 0);
+ si->tx_mirror_ports = clib_bitmap_set (si->tx_mirror_ports, dst_sw_if_index,
+ (state & 2) != 0);
+
+ new_num_rx_mirror_ports = clib_bitmap_count_set_bits (si->rx_mirror_ports);
+ new_num_tx_mirror_ports = clib_bitmap_count_set_bits (si->tx_mirror_ports);
+
+ if (new_num_rx_mirror_ports == 1 && si->num_rx_mirror_ports == 0)
+ vnet_feature_enable_disable ("device-input", "span-input",
+ src_sw_if_index, 1, 0, 0);
+
+ if (new_num_rx_mirror_ports == 0 && si->num_rx_mirror_ports == 1)
+ vnet_feature_enable_disable ("device-input", "span-input",
+ src_sw_if_index, 0, 0, 0);
+
+ if (new_num_rx_mirror_ports == 1 && si->num_rx_mirror_ports == 0)
+ vnet_feature_enable_disable ("device-input", "span-output",
+ src_sw_if_index, 1, 0, 0);
+
+ if (new_num_rx_mirror_ports == 0 && si->num_rx_mirror_ports == 1)
+ vnet_feature_enable_disable ("device-input", "span-output",
+ src_sw_if_index, 0, 0, 0);
+
+ si->num_rx_mirror_ports = new_num_rx_mirror_ports;
+ si->num_tx_mirror_ports = new_num_tx_mirror_ports;
+
+ if (dst_sw_if_index > sm->max_sw_if_index)
+ sm->max_sw_if_index = dst_sw_if_index;
+