linux-cp: Linux Interface Mirroring for Control Plane Integration

Type: feature

please see FEATURE.yaml for details.

Signed-off-by: Neale Ranns <nranns@cisco.com>
Signed-off-by: Matthew Smith <mgsmith@netgate.com>
Signed-off-by: Jon Loeliger <jdl@netgate.com>
Signed-off-by: Pim van Pelt <pim@ipng.nl>
Change-Id: I04a45c15c0838906aa787e06660fa29f39f755fa

1 files changed, 151 insertions, 0 deletions

diff --git a/src/plugins/linux-cp/lcp_adj.c b/src/plugins/linux-cp/lcp_adj.c
new file mode 100644
index 00000000000..9a08591a0c1
--- /dev/null
+++ b/src/plugins/linux-cp/lcp_adj.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2020 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 <vnet/adj/adj_delegate.h>
+#include <linux-cp/lcp_adj.h>
+
+#include <vppinfra/bihash_32_8.h>
+#include <vppinfra/bihash_template.c>
+
+static adj_delegate_type_t adj_type;
+
+/**
+ * The table of adjacencies indexed by the rewrite string
+ */
+BVT (clib_bihash) lcp_adj_tbl;
+
+static_always_inline void
+lcp_adj_mk_key_adj (const ip_adjacency_t *adj, lcp_adj_key_t *key)
+{
+  lcp_adj_mk_key (adj->rewrite_header.data, adj->rewrite_header.data_bytes,
+		  adj->rewrite_header.sw_if_index, key);
+}
+
+static u8 *
+lcp_adj_delegate_format (const adj_delegate_t *aed, u8 *s)
+{
+  return (format (s, "lcp"));
+}
+
+static void
+lcp_adj_delegate_adj_deleted (adj_delegate_t *aed)
+{
+  ip_adjacency_t *adj;
+  lcp_adj_kv_t kv;
+
+  adj = adj_get (aed->ad_adj_index);
+
+  lcp_adj_mk_key_adj (adj, &kv.k);
+
+  BV (clib_bihash_add_del) (&lcp_adj_tbl, &kv.kv, 0);
+}
+
+static void
+lcp_adj_delegate_adj_modified (adj_delegate_t *aed)
+{
+  ip_adjacency_t *adj;
+  lcp_adj_kv_t kv;
+
+  adj = adj_get (aed->ad_adj_index);
+
+  if (IP_LOOKUP_NEXT_REWRITE != adj->lookup_next_index)
+    return;
+
+  lcp_adj_mk_key_adj (adj, &kv.k);
+  kv.v = aed->ad_adj_index;
+
+  BV (clib_bihash_add_del) (&lcp_adj_tbl, &kv.kv, 1);
+}
+
+static void
+lcp_adj_delegate_adj_created (adj_index_t ai)
+{
+  ip_adjacency_t *adj;
+  lcp_adj_kv_t kv;
+
+  adj = adj_get (ai);
+
+  if (IP_LOOKUP_NEXT_REWRITE != adj->lookup_next_index)
+    return;
+
+  lcp_adj_mk_key_adj (adj, &kv.k);
+  kv.v = ai;
+
+  BV (clib_bihash_add_del) (&lcp_adj_tbl, &kv.kv, 1);
+}
+
+u8 *
+format_lcp_adj_kvp (u8 *s, va_list *args)
+{
+  BVT (clib_bihash_kv) *kv = va_arg (*args, BVT (clib_bihash_kv) *);
+  CLIB_UNUSED (int verbose) = va_arg (*args, int);
+  lcp_adj_kv_t *akv = (lcp_adj_kv_t *) kv;
+
+  s = format (s, "  %U:%U\n    %U", format_vnet_sw_if_index_name,
+	      vnet_get_main (), akv->k.sw_if_index, format_hex_bytes,
+	      akv->k.rewrite, 18, format_adj_nbr, akv->v, 4);
+
+  return (s);
+}
+
+static clib_error_t *
+lcp_adj_show_cmd (vlib_main_t *vm, unformat_input_t *input,
+		  vlib_cli_command_t *cmd)
+{
+  u8 verbose = 0;
+
+  if (unformat (input, "verbose"))
+    verbose = 1;
+
+  vlib_cli_output (vm, "Linux-CP Adjs:\n%U", BV (format_bihash), &lcp_adj_tbl,
+		   verbose);
+
+  return 0;
+}
+
+VLIB_CLI_COMMAND (lcp_itf_pair_show_cmd_node, static) = {
+  .path = "show lcp adj",
+  .function = lcp_adj_show_cmd,
+  .short_help = "show lcp adj",
+  .is_mp_safe = 1,
+};
+
+const adj_delegate_vft_t lcp_adj_vft = {
+  .adv_format = lcp_adj_delegate_format,
+  .adv_adj_deleted = lcp_adj_delegate_adj_deleted,
+  .adv_adj_modified = lcp_adj_delegate_adj_modified,
+  .adv_adj_created = lcp_adj_delegate_adj_created,
+};
+
+static clib_error_t *
+lcp_adj_init (vlib_main_t *vm)
+{
+  adj_type = adj_delegate_register_new_type (&lcp_adj_vft);
+
+  BV (clib_bihash_init) (&lcp_adj_tbl, "linux-cp ADJ table", 1024, 1 << 24);
+  BV (clib_bihash_set_kvp_format_fn) (&lcp_adj_tbl, format_lcp_adj_kvp);
+
+  return (NULL);
+}
+
+VLIB_INIT_FUNCTION (lcp_adj_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */