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authorNeale Ranns <nranns@cisco.com>2018-04-25 01:41:24 -0700
committerDave Barach <openvpp@barachs.net>2018-04-30 15:03:40 +0000
commit56f949b9d3d1c3ba6816169fff852a51bbe47a15 (patch)
treeadffd84ca4c3c3c7932a61b564df3a42c6969902 /src
parent404d85acf829fb03be76cc0dc007a9c03ebe09dc (diff)
FIB: elide cover walk for insert of host route
Change-Id: I2d39e56ff605e3a24927d6330d65d0406f588381 Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'src')
-rw-r--r--src/vnet/fib/fib_entry.c13
-rw-r--r--src/vnet/fib/fib_entry.h1
-rw-r--r--src/vnet/fib/fib_table.c14
3 files changed, 25 insertions, 3 deletions
diff --git a/src/vnet/fib/fib_entry.c b/src/vnet/fib/fib_entry.c
index cd1300dee39..a12edcb1867 100644
--- a/src/vnet/fib/fib_entry.c
+++ b/src/vnet/fib/fib_entry.c
@@ -1428,6 +1428,19 @@ fib_entry_get_best_source (fib_node_index_t entry_index)
}
/**
+ * Return !0 is the entry represents a host prefix
+ */
+int
+fib_entry_is_host (fib_node_index_t fib_entry_index)
+{
+ fib_prefix_t pfx;
+
+ fib_entry_get_prefix(fib_entry_index, &pfx);
+
+ return (fib_prefix_is_host(&pfx));
+}
+
+/**
* Return !0 is the entry is reoslved, i.e. will return a valid forwarding
* chain
*/
diff --git a/src/vnet/fib/fib_entry.h b/src/vnet/fib/fib_entry.h
index ddaf914389e..dcc310e8fbc 100644
--- a/src/vnet/fib/fib_entry.h
+++ b/src/vnet/fib/fib_entry.h
@@ -613,6 +613,7 @@ extern int fib_entry_is_sourced(fib_node_index_t fib_entry_index,
extern fib_node_index_t fib_entry_get_path_list(fib_node_index_t fib_entry_index);
extern int fib_entry_is_resolved(fib_node_index_t fib_entry_index);
+extern int fib_entry_is_host(fib_node_index_t fib_entry_index);
extern void fib_entry_set_flow_hash_config(fib_node_index_t fib_entry_index,
flow_hash_config_t hash_config);
diff --git a/src/vnet/fib/fib_table.c b/src/vnet/fib/fib_table.c
index d0bc33639b9..c37ac1dbd49 100644
--- a/src/vnet/fib/fib_table.c
+++ b/src/vnet/fib/fib_table.c
@@ -197,10 +197,18 @@ fib_table_post_insert_actions (fib_table_t *fib_table,
/*
* inform the covering entry that a new more specific
- * has been inserted beneath it
+ * has been inserted beneath it.
+ * If the prefix that has been inserted is a host route
+ * then it is not possible that it will be the cover for any
+ * other entry, so we can elide the walk. This is particularly
+ * beneficial since there are often many host entries sharing the
+ * same cover (i.e. ADJ or RR sourced entries).
*/
- fib_entry_cover_change_notify(fib_entry_cover_index,
- fib_entry_index);
+ if (!fib_entry_is_host(fib_entry_index))
+ {
+ fib_entry_cover_change_notify(fib_entry_cover_index,
+ fib_entry_index);
+ }
}
}