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authorNeale Ranns <nranns@cisco.com>2020-12-24 09:16:09 +0000
committerOle Tr�an <otroan@employees.org>2021-02-04 14:16:34 +0000
commit44db1caefbf5067b0cf0073299c9f21265331412 (patch)
tree4981dc028db66398cf6dc2ca9d309aa5a7bf7a1d /src/plugins/linux-cp/lcp_adj.h
parent1a52d37fc50acd479274c29c2e92b05cf32c3a6d (diff)
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
Diffstat (limited to 'src/plugins/linux-cp/lcp_adj.h')
-rw-r--r--src/plugins/linux-cp/lcp_adj.h84
1 files changed, 84 insertions, 0 deletions
diff --git a/src/plugins/linux-cp/lcp_adj.h b/src/plugins/linux-cp/lcp_adj.h
new file mode 100644
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+++ b/src/plugins/linux-cp/lcp_adj.h
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+/*
+ * 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.
+ */
+
+#ifndef __LCP_ADJ_DELEGATE_H__
+#define __LCP_ADJ_DELEGATE_H__
+
+#include <vppinfra/bihash_32_8.h>
+
+typedef struct lcp_adj_key_t_
+{
+ u32 sw_if_index;
+ u8 rewrite[28];
+} lcp_adj_key_t;
+
+STATIC_ASSERT (sizeof (lcp_adj_key_t) == 32, "LCP ADJ Key size changed");
+
+typedef struct lcp_adj_kv_t_
+{
+ union
+ {
+ BVT (clib_bihash_kv) kv;
+ struct
+ {
+ lcp_adj_key_t k;
+ u64 v;
+ };
+ };
+} lcp_adj_kv_t;
+
+STATIC_ASSERT (sizeof (lcp_adj_kv_t) == sizeof (BVT (clib_bihash_kv)),
+ "LCP ADJ Key size changed");
+
+/**
+ * The table of adjacencies indexed by the rewrite string
+ */
+extern BVT (clib_bihash) lcp_adj_tbl;
+
+static_always_inline void
+lcp_adj_mk_key (const u8 *rewrite, u8 len, u32 sw_if_index, lcp_adj_key_t *key)
+{
+ /*
+ * Construct the key from the provided rewrite, then pad with zeros
+ * to ensure the key does not have garbage bytes
+ */
+ ASSERT (len <= sizeof (key->rewrite));
+ clib_memcpy_fast (key->rewrite, rewrite, len);
+ clib_memset (key->rewrite + len, 0, sizeof (key->rewrite) - len);
+ key->sw_if_index = sw_if_index;
+}
+
+static_always_inline adj_index_t
+lcp_adj_lkup (const u8 *rewrite, u8 len, u32 sw_if_index)
+{
+ lcp_adj_kv_t kv;
+
+ lcp_adj_mk_key (rewrite, len, sw_if_index, &kv.k);
+
+ if (!BV (clib_bihash_search_inline) (&lcp_adj_tbl, &kv.kv))
+ return (kv.v);
+
+ return (ADJ_INDEX_INVALID);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
+
+#endif