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authorNeale Ranns <nranns@cisco.com>2017-05-24 09:15:43 -0700
committerFlorin Coras <florin.coras@gmail.com>2017-08-08 17:25:00 +0000
commitda78f957e46c686434149d332a477d7ea055d76a (patch)
tree4499475fa0904c4b7660dd29576857def77a29ba /src/vnet/mpls/mpls_tunnel.c
parentb60f4965bf6f51eb746e18fa0307af8e3444bf96 (diff)
L2 over MPLS
[support for VPWS/VPLS] - switch to using dpo_proto_t rather than fib_protocol_t in fib_paths so that we can describe L2 paths - VLIB nodes to handle pop/push of MPLS labels to L2 Change-Id: Id050d06a11fd2c9c1c81ce5a0654e6c5ae6afa6e Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'src/vnet/mpls/mpls_tunnel.c')
-rw-r--r--src/vnet/mpls/mpls_tunnel.c75
1 files changed, 46 insertions, 29 deletions
diff --git a/src/vnet/mpls/mpls_tunnel.c b/src/vnet/mpls/mpls_tunnel.c
index c025cc58033..6452a60bfe2 100644
--- a/src/vnet/mpls/mpls_tunnel.c
+++ b/src/vnet/mpls/mpls_tunnel.c
@@ -171,7 +171,7 @@ mpls_tunnel_mk_lb (mpls_tunnel_t *mt,
vec_validate(ctx.next_hops, fib_path_list_get_n_paths(mt->mt_path_list));
vec_reset_length(ctx.next_hops);
- lb_proto = vnet_link_to_dpo_proto(linkt);
+ lb_proto = fib_forw_chain_type_to_dpo_proto(fct);
fib_path_list_walk(mt->mt_path_list,
mpls_tunnel_collect_forwarding,
@@ -313,12 +313,34 @@ mpls_tunnel_restack (mpls_tunnel_t *mt)
/*
* walk all the adjacencies on the MPLS interface and restack them
*/
- FOR_EACH_FIB_PROTOCOL(proto)
+ if (mt->mt_flags & MPLS_TUNNEL_FLAG_L2)
{
- adj_nbr_walk(mt->mt_sw_if_index,
- proto,
- mpls_adj_walk_cb,
- NULL);
+ /*
+ * Stack a load-balance that drops, whilst we have no paths
+ */
+ vnet_hw_interface_t * hi;
+ dpo_id_t dpo = DPO_INVALID;
+
+ mpls_tunnel_mk_lb(mt,
+ VNET_LINK_MPLS,
+ FIB_FORW_CHAIN_TYPE_ETHERNET,
+ &dpo);
+
+ hi = vnet_get_hw_interface(vnet_get_main(), mt->mt_hw_if_index);
+ dpo_stack_from_node(hi->tx_node_index,
+ &mt->mt_l2_lb,
+ &dpo);
+ dpo_reset(&dpo);
+ }
+ else
+ {
+ FOR_EACH_FIB_PROTOCOL(proto)
+ {
+ adj_nbr_walk(mt->mt_sw_if_index,
+ proto,
+ mpls_adj_walk_cb,
+ NULL);
+ }
}
}
@@ -495,7 +517,7 @@ mpls_tunnel_tx (vlib_main_t * vm,
b0 = vlib_get_buffer(vm, bi0);
- vnet_buffer(b0)->ip.adj_index[VLIB_TX] = mt->mt_l2_adj;
+ vnet_buffer(b0)->ip.adj_index[VLIB_TX] = mt->mt_l2_lb.dpoi_index;
if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
{
@@ -506,7 +528,7 @@ mpls_tunnel_tx (vlib_main_t * vm,
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next,
- bi0, mt->mt_l2_tx_arc);
+ bi0, mt->mt_l2_lb.dpoi_next_node);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
@@ -565,8 +587,7 @@ vnet_mpls_tunnel_del (u32 sw_if_index)
if (FIB_NODE_INDEX_INVALID != mt->mt_path_list)
fib_path_list_child_remove(mt->mt_path_list,
mt->mt_sibling_index);
- if (ADJ_INDEX_INVALID != mt->mt_l2_adj)
- adj_unlock(mt->mt_l2_adj);
+ dpo_reset(&mt->mt_l2_lb);
vec_add1 (mpls_tunnel_free_hw_if_indices, mt->mt_hw_if_index);
pool_put(mpls_tunnel_pool, mt);
@@ -587,12 +608,13 @@ vnet_mpls_tunnel_create (u8 l2_only,
memset (mt, 0, sizeof (*mt));
mti = mt - mpls_tunnel_pool;
fib_node_init(&mt->mt_node, FIB_NODE_TYPE_MPLS_TUNNEL);
- mt->mt_l2_adj = ADJ_INDEX_INVALID;
mt->mt_path_list = FIB_NODE_INDEX_INVALID;
mt->mt_sibling_index = FIB_NODE_INDEX_INVALID;
if (is_multicast)
mt->mt_flags |= MPLS_TUNNEL_FLAG_MCAST;
+ if (l2_only)
+ mt->mt_flags |= MPLS_TUNNEL_FLAG_L2;
/*
* Create a new, or re=use and old, tunnel HW interface
@@ -614,7 +636,7 @@ vnet_mpls_tunnel_create (u8 l2_only,
mti,
mpls_tunnel_hw_interface_class.index,
mti);
- hi = vnet_get_hw_interface(vnm, mt->mt_hw_if_index);
+ hi = vnet_get_hw_interface (vnm, mt->mt_hw_if_index);
}
/*
@@ -624,19 +646,6 @@ vnet_mpls_tunnel_create (u8 l2_only,
vec_validate_init_empty(mpls_tunnel_db, mt->mt_sw_if_index, ~0);
mpls_tunnel_db[mt->mt_sw_if_index] = mti;
- if (l2_only)
- {
- mt->mt_l2_adj =
- adj_nbr_add_or_lock(fib_path_list_get_proto(mt->mt_path_list),
- VNET_LINK_ETHERNET,
- &zero_addr,
- mt->mt_sw_if_index);
-
- mt->mt_l2_tx_arc = vlib_node_add_named_next(vlib_get_main(),
- hi->tx_node_index,
- "adj-l2-midchain");
- }
-
return (mt->mt_sw_if_index);
}
@@ -803,7 +812,7 @@ vnet_create_mpls_tunnel_command_fn (vlib_main_t * vm,
&rpath.frp_sw_if_index))
{
rpath.frp_weight = 1;
- rpath.frp_proto = FIB_PROTOCOL_IP4;
+ rpath.frp_proto = DPO_PROTO_IP4;
}
else if (unformat (line_input, "via %U %U",
@@ -813,7 +822,7 @@ vnet_create_mpls_tunnel_command_fn (vlib_main_t * vm,
&rpath.frp_sw_if_index))
{
rpath.frp_weight = 1;
- rpath.frp_proto = FIB_PROTOCOL_IP6;
+ rpath.frp_proto = DPO_PROTO_IP6;
}
else if (unformat (line_input, "via %U",
unformat_ip6_address,
@@ -822,7 +831,7 @@ vnet_create_mpls_tunnel_command_fn (vlib_main_t * vm,
rpath.frp_fib_index = 0;
rpath.frp_weight = 1;
rpath.frp_sw_if_index = ~0;
- rpath.frp_proto = FIB_PROTOCOL_IP6;
+ rpath.frp_proto = DPO_PROTO_IP6;
}
else if (unformat (line_input, "via %U",
unformat_ip4_address,
@@ -831,7 +840,7 @@ vnet_create_mpls_tunnel_command_fn (vlib_main_t * vm,
rpath.frp_fib_index = 0;
rpath.frp_weight = 1;
rpath.frp_sw_if_index = ~0;
- rpath.frp_proto = FIB_PROTOCOL_IP4;
+ rpath.frp_proto = DPO_PROTO_IP4;
}
else if (unformat (line_input, "l2-only"))
l2_only = 1;
@@ -915,6 +924,14 @@ format_mpls_tunnel (u8 * s, va_list * args)
s = format(s, "%U", format_fib_path_ext_list, &mt->mt_path_exts);
s = format(s, "\n");
+ if (mt->mt_flags & MPLS_TUNNEL_FLAG_L2)
+ {
+ s = format(s, " forwarding: %U\n",
+ format_fib_forw_chain_type,
+ FIB_FORW_CHAIN_TYPE_ETHERNET);
+ s = format(s, " %U\n", format_dpo_id, &mt->mt_l2_lb, 2);
+ }
+
return (s);
}