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authorNeale Ranns <neale.ranns@cisco.com>2018-02-09 06:05:16 -0800
committerDamjan Marion <dmarion.lists@gmail.com>2018-02-12 11:23:33 +0000
commitffd78d1ef8fe80d1b756a71d42d5eadda60ae996 (patch)
tree99770e8773a7c3dd27c8b9b116edb6a39ace09ea /src/vnet/adj/adj.c
parent2d6f66e1748be190664cbd72c826db32616d759a (diff)
Improve MTU handling
- setting MTU on an interface updates the L3 max bytes too - value cached in the adjacency is also updated - MTU exceeded generates ICMP to sender Change-Id: I343ec71d8e903b529594c4bd0543f04bc7f370b3 Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
Diffstat (limited to 'src/vnet/adj/adj.c')
-rw-r--r--src/vnet/adj/adj.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/src/vnet/adj/adj.c b/src/vnet/adj/adj.c
index 5f7fe74cd43..d28d5195330 100644
--- a/src/vnet/adj/adj.c
+++ b/src/vnet/adj/adj.c
@@ -338,6 +338,43 @@ adj_feature_update (u32 sw_if_index,
adj_walk (sw_if_index, adj_feature_update_walk_cb, &ctx);
}
+static adj_walk_rc_t
+adj_mtu_update_walk_cb (adj_index_t ai,
+ void *arg)
+{
+ ip_adjacency_t *adj;
+
+ adj = adj_get(ai);
+
+ vnet_rewrite_update_mtu (vnet_get_main(),
+ &adj->rewrite_header);
+
+ return (ADJ_WALK_RC_CONTINUE);
+}
+
+static void
+adj_sw_mtu_update (vnet_main_t * vnm,
+ u32 sw_if_index,
+ void *ctx)
+{
+ /*
+ * Walk all the adjacencies on the interface to update the cached MTU
+ */
+ adj_walk (sw_if_index, adj_mtu_update_walk_cb, NULL);
+}
+
+void
+adj_mtu_update (u32 hw_if_index)
+{
+ /*
+ * Walk all the SW interfaces on the HW interface to update the cached MTU
+ */
+ vnet_hw_interface_walk_sw(vnet_get_main(),
+ hw_if_index,
+ adj_sw_mtu_update,
+ NULL);
+}
+
/**
* @brief Walk the Adjacencies on a given interface
*/