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authorNeale Ranns <nranns@cisco.com>2017-03-01 15:12:11 -0800
committerNeale Ranns <nranns@cisco.com>2017-04-07 09:12:12 +0000
commit0f26c5a0138ac86d7ebd197c31a09d8d624c35fe (patch)
tree5cee4659885432c439e44d7346fd5e482df5f0e6 /src/vnet/dpo/interface_dpo.c
parentc14f31c2c62fb66d98aef4402a6f1bda09683fd3 (diff)
MPLS Mcast
1 - interface-DPO Used in the Data-plane to change a packet's input interface 2 - MPLS multicast FIB entry Same as a unicast entry but it links to a replicate not a load-balance DPO 3 - Multicast MPLS tunnel Update MPLS tunnels to use a FIB path-list to describe the endpoint[s]. Use the path-list to generate the forwarding chain (DPOs) to link to . 4 - Resolve a path via a local label (of an mLDP LSP) For IP multicast entries to use an LSP in the replication list, we need to decribe the 'resolve-via-label' where the label is that of a multicast LSP. 5 - MPLS disposition path sets RPF-ID For a interface-less LSP (i.e. mLDP not RSVP-TE) at the tail of the LSP we still need to perform an RPF check. An MPLS disposition DPO performs the MPLS pop validation checks and sets the RPF-ID in the packet. 6 - RPF check with per-entry RPF-ID An RPF-ID is used instead of a real interface SW if index in the case the IP traffic arrives from an LSP that does not have an associated interface. Change-Id: Ib92e177be919147bafeb599729abf3d1abc2f4b3 Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'src/vnet/dpo/interface_dpo.c')
-rw-r--r--src/vnet/dpo/interface_dpo.c416
1 files changed, 416 insertions, 0 deletions
diff --git a/src/vnet/dpo/interface_dpo.c b/src/vnet/dpo/interface_dpo.c
new file mode 100644
index 00000000000..50ca756f9da
--- /dev/null
+++ b/src/vnet/dpo/interface_dpo.c
@@ -0,0 +1,416 @@
+/*
+ * Copyright (c) 2016 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/dpo/interface_dpo.h>
+#include <vnet/fib/fib_node.h>
+
+/*
+ * The 'DB' of interface DPOs.
+ * There is only one per-interface per-protocol, so this is a per-interface
+ * vector
+ */
+static index_t *interface_dpo_db[DPO_PROTO_NUM];
+
+static interface_dpo_t *
+interface_dpo_alloc (void)
+{
+ interface_dpo_t *ido;
+
+ pool_get(interface_dpo_pool, ido);
+
+ return (ido);
+}
+
+static inline interface_dpo_t *
+interface_dpo_get_from_dpo (const dpo_id_t *dpo)
+{
+ ASSERT(DPO_INTERFACE == dpo->dpoi_type);
+
+ return (interface_dpo_get(dpo->dpoi_index));
+}
+
+static inline index_t
+interface_dpo_get_index (interface_dpo_t *ido)
+{
+ return (ido - interface_dpo_pool);
+}
+
+static void
+interface_dpo_lock (dpo_id_t *dpo)
+{
+ interface_dpo_t *ido;
+
+ ido = interface_dpo_get_from_dpo(dpo);
+ ido->ido_locks++;
+}
+
+static void
+interface_dpo_unlock (dpo_id_t *dpo)
+{
+ interface_dpo_t *ido;
+
+ ido = interface_dpo_get_from_dpo(dpo);
+ ido->ido_locks--;
+
+ if (0 == ido->ido_locks)
+ {
+ interface_dpo_db[ido->ido_proto][ido->ido_sw_if_index] =
+ INDEX_INVALID;
+ pool_put(interface_dpo_pool, ido);
+ }
+}
+
+/*
+ * interface_dpo_add_or_lock
+ *
+ * Add/create and lock a new or lock an existing for the interface DPO
+ * on the interface and protocol given
+ */
+void
+interface_dpo_add_or_lock (dpo_proto_t proto,
+ u32 sw_if_index,
+ dpo_id_t *dpo)
+{
+ interface_dpo_t *ido;
+
+ vec_validate_init_empty(interface_dpo_db[proto],
+ sw_if_index,
+ INDEX_INVALID);
+
+ if (INDEX_INVALID == interface_dpo_db[proto][sw_if_index])
+ {
+ ido = interface_dpo_alloc();
+
+ ido->ido_sw_if_index = sw_if_index;
+ ido->ido_proto = proto;
+
+ interface_dpo_db[proto][sw_if_index] =
+ interface_dpo_get_index(ido);
+ }
+ else
+ {
+ ido = interface_dpo_get(interface_dpo_db[proto][sw_if_index]);
+ }
+
+ dpo_set(dpo, DPO_INTERFACE, proto, interface_dpo_get_index(ido));
+}
+
+
+static clib_error_t *
+interface_dpo_interface_state_change (vnet_main_t * vnm,
+ u32 sw_if_index,
+ u32 flags)
+{
+ /*
+ */
+ return (NULL);
+}
+
+VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION(
+ interface_dpo_interface_state_change);
+
+/**
+ * @brief Registered callback for HW interface state changes
+ */
+static clib_error_t *
+interface_dpo_hw_interface_state_change (vnet_main_t * vnm,
+ u32 hw_if_index,
+ u32 flags)
+{
+ return (NULL);
+}
+
+VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION(
+ interface_dpo_hw_interface_state_change);
+
+static clib_error_t *
+interface_dpo_interface_delete (vnet_main_t * vnm,
+ u32 sw_if_index,
+ u32 is_add)
+{
+ return (NULL);
+}
+
+VNET_SW_INTERFACE_ADD_DEL_FUNCTION(
+ interface_dpo_interface_delete);
+
+u8*
+format_interface_dpo (u8* s, va_list *ap)
+{
+ index_t index = va_arg(*ap, index_t);
+ CLIB_UNUSED(u32 indent) = va_arg(*ap, u32);
+ vnet_main_t * vnm = vnet_get_main();
+ interface_dpo_t *ido = interface_dpo_get(index);
+
+ return (format(s, "%U-dpo: %U",
+ format_vnet_sw_interface_name,
+ vnm,
+ vnet_get_sw_interface(vnm, ido->ido_sw_if_index),
+ format_dpo_proto, ido->ido_proto));
+}
+
+static void
+interface_dpo_mem_show (void)
+{
+ fib_show_memory_usage("Interface",
+ pool_elts(interface_dpo_pool),
+ pool_len(interface_dpo_pool),
+ sizeof(interface_dpo_t));
+}
+
+
+const static dpo_vft_t interface_dpo_vft = {
+ .dv_lock = interface_dpo_lock,
+ .dv_unlock = interface_dpo_unlock,
+ .dv_format = format_interface_dpo,
+ .dv_mem_show = interface_dpo_mem_show,
+};
+
+/**
+ * @brief The per-protocol VLIB graph nodes that are assigned to a glean
+ * object.
+ *
+ * this means that these graph nodes are ones from which a glean is the
+ * parent object in the DPO-graph.
+ */
+const static char* const interface_dpo_ip4_nodes[] =
+{
+ "interface-dpo-ip4",
+ NULL,
+};
+const static char* const interface_dpo_ip6_nodes[] =
+{
+ "interface-dpo-ip4",
+ NULL,
+};
+
+const static char* const * const interface_dpo_nodes[DPO_PROTO_NUM] =
+{
+ [DPO_PROTO_IP4] = interface_dpo_ip4_nodes,
+ [DPO_PROTO_IP6] = interface_dpo_ip6_nodes,
+ [DPO_PROTO_MPLS] = NULL,
+};
+
+void
+interface_dpo_module_init (void)
+{
+ dpo_register(DPO_INTERFACE,
+ &interface_dpo_vft,
+ interface_dpo_nodes);
+}
+
+/**
+ * @brief Interface DPO trace data
+ */
+typedef struct interface_dpo_trace_t_
+{
+ u32 sw_if_index;
+} interface_dpo_trace_t;
+
+typedef enum interface_dpo_next_t_
+{
+ INTERFACE_DPO_DROP = 0,
+ INTERFACE_DPO_INPUT = 1,
+} interface_dpo_next_t;
+
+always_inline uword
+interface_dpo_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ u32 n_left_from, next_index, * from, * to_next;
+ u32 cpu_index = os_get_cpu_number();
+ vnet_interface_main_t *im;
+
+ im = &vnet_get_main ()->interface_main;
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from >= 4 && n_left_to_next > 2)
+ {
+ const interface_dpo_t *ido0, *ido1;
+ u32 bi0, idoi0, bi1, idoi1;
+ vlib_buffer_t *b0, *b1;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ bi1 = from[1];
+ to_next[1] = bi1;
+ from += 2;
+ to_next += 2;
+ n_left_from -= 2;
+ n_left_to_next -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ idoi0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
+ idoi1 = vnet_buffer(b1)->ip.adj_index[VLIB_TX];
+ ido0 = interface_dpo_get(idoi0);
+ ido1 = interface_dpo_get(idoi1);
+
+ vnet_buffer(b0)->sw_if_index[VLIB_RX] = ido0->ido_sw_if_index;
+ vnet_buffer(b1)->sw_if_index[VLIB_RX] = ido1->ido_sw_if_index;
+
+ vlib_increment_combined_counter (im->combined_sw_if_counters
+ + VNET_INTERFACE_COUNTER_RX,
+ cpu_index,
+ ido0->ido_sw_if_index,
+ 1,
+ vlib_buffer_length_in_chain (vm, b0));
+ vlib_increment_combined_counter (im->combined_sw_if_counters
+ + VNET_INTERFACE_COUNTER_RX,
+ cpu_index,
+ ido1->ido_sw_if_index,
+ 1,
+ vlib_buffer_length_in_chain (vm, b1));
+
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ interface_dpo_trace_t *tr0;
+
+ tr0 = vlib_add_trace (vm, node, b0, sizeof (*tr0));
+ tr0->sw_if_index = ido0->ido_sw_if_index;
+ }
+ if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ interface_dpo_trace_t *tr1;
+
+ tr1 = vlib_add_trace (vm, node, b1, sizeof (*tr1));
+ tr1->sw_if_index = ido1->ido_sw_if_index;
+ }
+
+ vlib_validate_buffer_enqueue_x2(vm, node, next_index, to_next,
+ n_left_to_next, bi0, bi1,
+ INTERFACE_DPO_INPUT,
+ INTERFACE_DPO_INPUT);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ const interface_dpo_t * ido0;
+ vlib_buffer_t * b0;
+ u32 bi0, idoi0;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ idoi0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
+ ido0 = interface_dpo_get(idoi0);
+
+ /* Swap the RX interface of the packet to the one the
+ * interface DPR represents */
+ vnet_buffer(b0)->sw_if_index[VLIB_RX] = ido0->ido_sw_if_index;
+
+ /* Bump the interface's RX coutners */
+ vlib_increment_combined_counter (im->combined_sw_if_counters
+ + VNET_INTERFACE_COUNTER_RX,
+ cpu_index,
+ ido0->ido_sw_if_index,
+ 1,
+ vlib_buffer_length_in_chain (vm, b0));
+
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ interface_dpo_trace_t *tr;
+
+ tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
+ tr->sw_if_index = ido0->ido_sw_if_index;
+ }
+
+ vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next,
+ n_left_to_next, bi0,
+ INTERFACE_DPO_INPUT);
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+ return from_frame->n_vectors;
+}
+
+static u8 *
+format_interface_dpo_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ interface_dpo_trace_t * t = va_arg (*args, interface_dpo_trace_t *);
+ uword indent = format_get_indent (s);
+ s = format (s, "%U sw_if_index:%d",
+ format_white_space, indent,
+ t->sw_if_index);
+ return s;
+}
+
+static uword
+interface_dpo_ip4 (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return (interface_dpo_inline(vm, node, from_frame));
+}
+
+static uword
+interface_dpo_ip6 (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return (interface_dpo_inline(vm, node, from_frame));
+}
+
+VLIB_REGISTER_NODE (interface_dpo_ip4_node) = {
+ .function = interface_dpo_ip4,
+ .name = "interface-dpo-ip4",
+ .vector_size = sizeof (u32),
+ .format_trace = format_interface_dpo_trace,
+
+ .n_next_nodes = 2,
+ .next_nodes = {
+ [INTERFACE_DPO_DROP] = "ip4-drop",
+ [INTERFACE_DPO_INPUT] = "ip4-input",
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (interface_dpo_ip4_node,
+ interface_dpo_ip4)
+
+VLIB_REGISTER_NODE (interface_dpo_ip6_node) = {
+ .function = interface_dpo_ip6,
+ .name = "interface-dpo-ip6",
+ .vector_size = sizeof (u32),
+ .format_trace = format_interface_dpo_trace,
+
+ .n_next_nodes = 2,
+ .next_nodes = {
+ [INTERFACE_DPO_DROP] = "ip6-drop",
+ [INTERFACE_DPO_INPUT] = "ip6-input",
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (interface_dpo_ip6_node,
+ interface_dpo_ip6)
+