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-rw-r--r--src/vnet/span/span.c197
1 files changed, 197 insertions, 0 deletions
diff --git a/src/vnet/span/span.c b/src/vnet/span/span.c
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+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vlib/vlib.h>
+#include <vppinfra/error.h>
+#include <vnet/feature/feature.h>
+
+#include <vnet/span/span.h>
+
+int
+span_add_delete_entry (vlib_main_t * vm,
+ u32 src_sw_if_index, u32 dst_sw_if_index, u8 state)
+{
+ span_main_t *sm = &span_main;
+ span_interface_t *si;
+ u32 new_num_rx_mirror_ports, new_num_tx_mirror_ports;
+
+ if (state > 3)
+ return VNET_API_ERROR_UNIMPLEMENTED;
+
+ if ((src_sw_if_index == ~0) || (dst_sw_if_index == ~0 && state > 0)
+ || (src_sw_if_index == dst_sw_if_index))
+ return VNET_API_ERROR_INVALID_INTERFACE;
+
+ vnet_sw_interface_t *sw_if;
+
+ sw_if = vnet_get_sw_interface (vnet_get_main (), src_sw_if_index);
+ if (sw_if->type == VNET_SW_INTERFACE_TYPE_SUB)
+ return VNET_API_ERROR_UNIMPLEMENTED;
+
+ vec_validate_aligned (sm->interfaces, src_sw_if_index,
+ CLIB_CACHE_LINE_BYTES);
+ 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;
+
+ return 0;
+}
+
+static clib_error_t *
+set_interface_span_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ span_main_t *sm = &span_main;
+ u32 src_sw_if_index = ~0;
+ u32 dst_sw_if_index = ~0;
+ u8 state = 3;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "%U", unformat_vnet_sw_interface,
+ sm->vnet_main, &src_sw_if_index))
+ ;
+ else if (unformat (input, "destination %U", unformat_vnet_sw_interface,
+ sm->vnet_main, &dst_sw_if_index))
+ ;
+ else if (unformat (input, "disable"))
+ state = 0;
+ else if (unformat (input, "rx"))
+ state = 1;
+ else if (unformat (input, "tx"))
+ state = 2;
+ else if (unformat (input, "both"))
+ state = 3;
+ else
+ break;
+ }
+
+ int rv =
+ span_add_delete_entry (vm, src_sw_if_index, dst_sw_if_index, state);
+ if (rv == VNET_API_ERROR_INVALID_INTERFACE)
+ return clib_error_return (0, "Invalid interface");
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_interface_span_command, static) = {
+ .path = "set interface span",
+ .short_help = "set interface span <if-name> [disable | destination <if-name> [both|rx|tx]]",
+ .function = set_interface_span_command_fn,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+show_interfaces_span_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ span_main_t *sm = &span_main;
+ span_interface_t *si;
+ vnet_main_t *vnm = &vnet_main;
+ u8 header = 1;
+ char *states[] = { "none", "rx", "tx", "both" };
+ u8 *s = 0;
+
+ /* *INDENT-OFF* */
+ vec_foreach (si, sm->interfaces)
+ if (si->num_rx_mirror_ports || si->num_tx_mirror_ports)
+ {
+ clib_bitmap_t *b;
+ u32 i;
+ b = clib_bitmap_dup_or (si->rx_mirror_ports, si->tx_mirror_ports);
+ if (header)
+ {
+ vlib_cli_output (vm, "%-40s %s", "Source interface",
+ "Mirror interface (direction)");
+ header = 0;
+ }
+ s = format (s, "%U", format_vnet_sw_if_index_name, vnm,
+ si - sm->interfaces);
+ clib_bitmap_foreach (i, b, (
+ {
+ int state;
+ state = (clib_bitmap_get (si->rx_mirror_ports, i) +
+ clib_bitmap_get (si->tx_mirror_ports, i) * 2);
+
+ vlib_cli_output (vm, "%-40v %U (%s)", s,
+ format_vnet_sw_if_index_name, vnm, i,
+ states[state]);
+ vec_reset_length (s);
+ }));
+ clib_bitmap_free (b);
+ }
+ /* *INDENT-ON* */
+ vec_free (s);
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (show_interfaces_span_command, static) = {
+ .path = "show interfaces span",
+ .short_help = "Shows SPAN mirror table",
+ .function = show_interfaces_span_command_fn,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+span_init (vlib_main_t * vm)
+{
+ span_main_t *sm = &span_main;
+
+ sm->vlib_main = vm;
+ sm->vnet_main = vnet_get_main ();
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (span_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */