fib_entry_src_interface_remove (fib_entry_src_t *src)
{
src->fes_pl = FIB_NODE_INDEX_INVALID;
+ ASSERT(src->u.interface.fesi_sibling == ~0);
+}
+
+static int
+fib_entry_src_interface_update_glean (fib_entry_t *cover,
+ const fib_entry_t *local)
+{
+ fib_entry_src_t *src;
+ adj_index_t ai;
+
+ src = fib_entry_src_find (cover, FIB_SOURCE_INTERFACE);
+
+ if (NULL == src)
+ {
+ /*
+ * The cover is not an interface source, no work
+ */
+ return 0;
+ }
+
+ ai = fib_path_list_get_adj(src->fes_pl,
+ fib_entry_get_default_chain_type(cover));
+
+ if (INDEX_INVALID != ai)
+ {
+ ip_adjacency_t *adj;
+
+ adj = adj_get(ai);
+
+ if (IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index)
+ {
+ /*
+ * the connected prefix will link to a glean on a non-p2p
+ * interface.
+ * Ensure we are updating with a host in the connected's subnet
+ */
+ if (fib_prefix_is_cover(&adj->sub_type.glean.rx_pfx,
+ &local->fe_prefix))
+ {
+ fib_entry_src_t *local_src;
+
+ local_src = fib_entry_src_find (local, FIB_SOURCE_INTERFACE);
+ if (local_src != NULL)
+ {
+ adj->sub_type.glean.rx_pfx.fp_addr =
+ local->fe_prefix.fp_addr;
+ local_src->fes_flags |= FIB_ENTRY_SRC_FLAG_PROVIDES_GLEAN;
+ return (1);
+ }
+ }
+ }
+ }
+
+ return (0);
+}
+
+static walk_rc_t
+fib_entry_src_interface_update_glean_walk (fib_entry_t *cover,
+ fib_node_index_t covered,
+ void *ctx)
+{
+ if (fib_entry_src_interface_update_glean(cover, fib_entry_get(covered)))
+ return (WALK_STOP);
+
+ return (WALK_CONTINUE);
}
static void
fib_path_list_flags_t pl_flags,
const fib_route_path_t *paths)
{
- fib_node_index_t fib_entry_index;
- ip_adjacency_t *adj;
-
- fib_entry_index = fib_entry_get_index(entry);
src->fes_pl = fib_path_list_create(pl_flags, paths);
+}
- /*
- * this is a hack to get the entry's prefix into the glean adjacency
- * so that it is available for fast retrieval in the switch path.
- */
- if (!(FIB_ENTRY_FLAG_LOCAL & src->fes_entry_flags))
- {
- adj_index_t ai;
+typedef struct fesi_find_glean_ctx_t_ {
+ fib_node_index_t glean_node_index;
+} fesi_find_glean_ctx_t;
- ai = fib_path_list_get_adj(src->fes_pl,
- fib_entry_get_default_chain_type(
- fib_entry_get(fib_entry_index)));
- if (INDEX_INVALID != ai)
- {
- adj = adj_get(ai);
+static walk_rc_t
+fib_entry_src_interface_find_glean_walk (fib_entry_t *cover,
+ fib_node_index_t covered,
+ void *ctx)
+{
+ fesi_find_glean_ctx_t *find_glean_ctx = ctx;
+ fib_entry_t *covered_entry;
+ fib_entry_src_t *covered_src;
- if (IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index)
- {
- /*
- * the connected prefix will link to a glean on a non-p2p
- * u.interface.
- */
- adj->sub_type.glean.receive_addr = entry->fe_prefix.fp_addr;
- }
- }
+ covered_entry = fib_entry_get (covered);
+ covered_src = fib_entry_src_find (covered_entry, FIB_SOURCE_INTERFACE);
+ if ((covered_src != NULL) &&
+ (covered_src->fes_flags & FIB_ENTRY_SRC_FLAG_PROVIDES_GLEAN))
+ {
+ find_glean_ctx->glean_node_index = covered;
+ return WALK_STOP;
}
+
+ return WALK_CONTINUE;
+}
+
+static fib_entry_t *
+fib_entry_src_interface_find_glean (fib_entry_t *cover)
+{
+ fib_entry_src_t *src;
+
+ src = fib_entry_src_find (cover, FIB_SOURCE_INTERFACE);
+ if (src == NULL)
+ /* the cover is not an interface source */
+ return NULL;
+
+ fesi_find_glean_ctx_t ctx = {
+ .glean_node_index = ~0,
+ };
+
+ fib_entry_cover_walk (cover, fib_entry_src_interface_find_glean_walk,
+ &ctx);
+
+ return (ctx.glean_node_index == ~0) ? NULL :
+ fib_entry_get (ctx.glean_node_index);
}
/*
if (FIB_ENTRY_FLAG_LOCAL & src->fes_entry_flags)
{
+ u8 update_glean;
+
/*
* Track the covering attached/connected cover. This is so that
* during an attached export of the cover, this local prefix is
cover = fib_entry_get(src->u.interface.fesi_cover);
+ /*
+ * Before adding as a child of the cover, check whether an existing
+ * child has already been used to populate the glean adjacency. If so,
+ * we don't need to update the adjacency.
+ */
+ update_glean = (fib_entry_src_interface_find_glean (cover) == NULL);
src->u.interface.fesi_sibling =
fib_entry_cover_track(cover, fib_entry_get_index(fib_entry));
+
+ if (update_glean)
+ fib_entry_src_interface_update_glean(cover, fib_entry);
}
return (!0);
if (FIB_NODE_INDEX_INVALID != src->u.interface.fesi_cover)
{
cover = fib_entry_get(src->u.interface.fesi_cover);
-
fib_entry_cover_untrack(cover, src->u.interface.fesi_sibling);
src->u.interface.fesi_cover = FIB_NODE_INDEX_INVALID;
+ src->u.interface.fesi_sibling = ~0;
+
+ /* If this was the glean address, find a new one */
+ if (src->fes_flags & FIB_ENTRY_SRC_FLAG_PROVIDES_GLEAN)
+ {
+ fib_entry_cover_walk(cover,
+ fib_entry_src_interface_update_glean_walk,
+ NULL);
+ src->fes_flags &= ~FIB_ENTRY_SRC_FLAG_PROVIDES_GLEAN;
+ }
}
}
Code Review / vpp.git / blobdiff