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-rw-r--r--src/vnet/mfib/mfib_entry_src_rr.c112
1 files changed, 112 insertions, 0 deletions
diff --git a/src/vnet/mfib/mfib_entry_src_rr.c b/src/vnet/mfib/mfib_entry_src_rr.c
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+++ b/src/vnet/mfib/mfib_entry_src_rr.c
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2018 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/mfib/mfib_entry_src.h>
+#include <vnet/mfib/mfib_entry_cover.h>
+#include <vnet/mfib/mfib_table.h>
+#include <vnet/fib/fib_path_list.h>
+
+static void
+mfib_entry_src_rr_deactiviate (mfib_entry_t *mfib_entry,
+ mfib_entry_src_t *msrc)
+{
+ mfib_entry_t *cover;
+
+ /*
+ * remove the depednecy on the covering entry
+ */
+ if (FIB_NODE_INDEX_INVALID != msrc->mfes_cover)
+ {
+ cover = mfib_entry_get(msrc->mfes_cover);
+ mfib_entry_cover_untrack(cover, msrc->mfes_sibling);
+ msrc->mfes_cover = FIB_NODE_INDEX_INVALID;
+ }
+
+ fib_path_list_unlock(msrc->mfes_pl);
+ msrc->mfes_pl = FIB_NODE_INDEX_INVALID;
+ msrc->mfes_itfs = NULL;
+ msrc->mfes_exts = NULL;
+}
+
+static void
+mfib_entry_src_rr_activiate (mfib_entry_t *mfib_entry,
+ mfib_entry_src_t *msrc)
+{
+ mfib_entry_src_t *csrc;
+ mfib_entry_t *cover;
+
+ msrc->mfes_cover = mfib_table_get_less_specific(mfib_entry->mfe_fib_index,
+ &mfib_entry->mfe_prefix);
+
+ ASSERT(FIB_NODE_INDEX_INVALID != msrc->mfes_cover);
+
+ cover = mfib_entry_get(msrc->mfes_cover);
+
+ msrc->mfes_sibling =
+ mfib_entry_cover_track(cover, mfib_entry_get_index(mfib_entry));
+
+ csrc = mfib_entry_get_best_src(cover);
+
+ msrc->mfes_pl = csrc->mfes_pl;
+ fib_path_list_lock(msrc->mfes_pl);
+ msrc->mfes_flags = csrc->mfes_flags;
+ msrc->mfes_itfs = csrc->mfes_itfs;
+ msrc->mfes_exts = csrc->mfes_exts;
+ msrc->mfes_rpf_id = csrc->mfes_rpf_id;
+}
+
+static mfib_src_res_t
+mfib_entry_src_rr_cover_change (mfib_entry_t *mfib_entry,
+ mfib_entry_src_t *msrc)
+{
+ mfib_entry_src_rr_deactiviate(mfib_entry, msrc);
+ mfib_entry_src_rr_activiate(mfib_entry, msrc);
+
+ return (MFIB_SRC_REEVALUATE);
+}
+
+static mfib_src_res_t
+mfib_entry_src_rr_cover_update (mfib_entry_t *mfib_entry,
+ mfib_entry_src_t *msrc)
+{
+ /*
+ * path lists are updated (i.e. not shared) in the mfib world,
+ * so there's no need to check for a new one. but we do need to
+ * copy down any new flags and input interfaces
+ */
+ mfib_entry_t *cover;
+
+ cover = mfib_entry_get(msrc->mfes_cover);
+
+ msrc->mfes_flags = cover->mfe_flags;
+ msrc->mfes_itfs = cover->mfe_itfs;
+ msrc->mfes_rpf_id = cover->mfe_rpf_id;
+
+ return (MFIB_SRC_REEVALUATE);
+}
+
+void
+mfib_entry_src_rr_module_init (void)
+{
+ mfib_entry_src_vft mvft = {
+ .mev_activate = mfib_entry_src_rr_activiate,
+ .mev_deactivate = mfib_entry_src_rr_deactiviate,
+ .mev_cover_change = mfib_entry_src_rr_cover_change,
+ .mev_cover_update = mfib_entry_src_rr_cover_update,
+ };
+
+ mfib_entry_src_register(MFIB_SOURCE_RR, &mvft);
+}