--- /dev/null
+/*
+ * 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/ip/ip.h>
+#include <vnet/dpo/mpls_disposition.h>
+#include <vnet/mpls/mpls.h>
+
+/*
+ * pool of all MPLS Label DPOs
+ */
+mpls_disp_dpo_t *mpls_disp_dpo_pool;
+
+static mpls_disp_dpo_t *
+mpls_disp_dpo_alloc (void)
+{
+ mpls_disp_dpo_t *mdd;
+
+ pool_get_aligned(mpls_disp_dpo_pool, mdd, CLIB_CACHE_LINE_BYTES);
+ memset(mdd, 0, sizeof(*mdd));
+
+ dpo_reset(&mdd->mdd_dpo);
+
+ return (mdd);
+}
+
+static index_t
+mpls_disp_dpo_get_index (mpls_disp_dpo_t *mdd)
+{
+ return (mdd - mpls_disp_dpo_pool);
+}
+
+index_t
+mpls_disp_dpo_create (dpo_proto_t payload_proto,
+ fib_rpf_id_t rpf_id,
+ const dpo_id_t *dpo)
+{
+ mpls_disp_dpo_t *mdd;
+
+ mdd = mpls_disp_dpo_alloc();
+
+ mdd->mdd_payload_proto = payload_proto;
+ mdd->mdd_rpf_id = rpf_id;
+
+ dpo_stack(DPO_MPLS_DISPOSITION,
+ mdd->mdd_payload_proto,
+ &mdd->mdd_dpo,
+ dpo);
+
+ return (mpls_disp_dpo_get_index(mdd));
+}
+
+u8*
+format_mpls_disp_dpo (u8 *s, va_list *args)
+{
+ index_t index = va_arg (*args, index_t);
+ u32 indent = va_arg (*args, u32);
+ mpls_disp_dpo_t *mdd;
+
+ mdd = mpls_disp_dpo_get(index);
+
+ s = format(s, "mpls-disposition:[%d]:[%U]",
+ index,
+ format_dpo_proto, mdd->mdd_payload_proto);
+
+ s = format(s, "\n%U", format_white_space, indent);
+ s = format(s, "%U", format_dpo_id, &mdd->mdd_dpo, indent+2);
+
+ return (s);
+}
+
+static void
+mpls_disp_dpo_lock (dpo_id_t *dpo)
+{
+ mpls_disp_dpo_t *mdd;
+
+ mdd = mpls_disp_dpo_get(dpo->dpoi_index);
+
+ mdd->mdd_locks++;
+}
+
+static void
+mpls_disp_dpo_unlock (dpo_id_t *dpo)
+{
+ mpls_disp_dpo_t *mdd;
+
+ mdd = mpls_disp_dpo_get(dpo->dpoi_index);
+
+ mdd->mdd_locks--;
+
+ if (0 == mdd->mdd_locks)
+ {
+ dpo_reset(&mdd->mdd_dpo);
+ pool_put(mpls_disp_dpo_pool, mdd);
+ }
+}
+
+/**
+ * @brief A struct to hold tracing information for the MPLS label disposition
+ * node.
+ */
+typedef struct mpls_label_disposition_trace_t_
+{
+ index_t mdd;
+} mpls_label_disposition_trace_t;
+
+always_inline uword
+mpls_label_disposition_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame,
+ u8 payload_is_ip4,
+ u8 payload_is_ip6)
+{
+ u32 n_left_from, next_index, * from, * to_next;
+
+ 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)
+ {
+ mpls_disp_dpo_t *mdd0, *mdd1;
+ u32 bi0, mddi0, bi1, mddi1;
+ vlib_buffer_t * b0, *b1;
+ u32 next0, next1;
+
+ bi0 = to_next[0] = from[0];
+ bi1 = to_next[1] = from[1];
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t * p2, * p3;
+
+ p2 = vlib_get_buffer (vm, from[2]);
+ p3 = vlib_get_buffer (vm, from[3]);
+
+ vlib_prefetch_buffer_header (p2, STORE);
+ vlib_prefetch_buffer_header (p3, STORE);
+
+ CLIB_PREFETCH (p2->data, sizeof (ip6_header_t), STORE);
+ CLIB_PREFETCH (p3->data, sizeof (ip6_header_t), STORE);
+ }
+
+ 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);
+
+ /* dst lookup was done by ip4 lookup */
+ mddi0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
+ mddi1 = vnet_buffer(b1)->ip.adj_index[VLIB_TX];
+ mdd0 = mpls_disp_dpo_get(mddi0);
+ mdd1 = mpls_disp_dpo_get(mddi1);
+
+ if (payload_is_ip4)
+ {
+ /*
+ * decrement the TTL on ingress to the LSP
+ */
+ }
+ else if (payload_is_ip6)
+ {
+ /*
+ * decrement the TTL on ingress to the LSP
+ */
+ }
+
+ next0 = mdd0->mdd_dpo.dpoi_next_node;
+ next1 = mdd1->mdd_dpo.dpoi_next_node;
+ vnet_buffer(b0)->ip.adj_index[VLIB_TX] = mdd0->mdd_dpo.dpoi_index;
+ vnet_buffer(b1)->ip.adj_index[VLIB_TX] = mdd1->mdd_dpo.dpoi_index;
+ vnet_buffer(b0)->ip.rpf_id = mdd0->mdd_rpf_id;
+ vnet_buffer(b1)->ip.rpf_id = mdd1->mdd_rpf_id;
+
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ mpls_label_disposition_trace_t *tr =
+ vlib_add_trace (vm, node, b0, sizeof (*tr));
+
+ tr->mdd = mddi0;
+ }
+ if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ mpls_label_disposition_trace_t *tr =
+ vlib_add_trace (vm, node, b1, sizeof (*tr));
+ tr->mdd = mddi1;
+ }
+
+ vlib_validate_buffer_enqueue_x2(vm, node, next_index, to_next,
+ n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ mpls_disp_dpo_t *mdd0;
+ vlib_buffer_t * b0;
+ u32 bi0, mddi0;
+ u32 next0;
+
+ 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);
+
+ /* dst lookup was done by ip4 lookup */
+ mddi0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
+ mdd0 = mpls_disp_dpo_get(mddi0);
+
+ if (payload_is_ip4)
+ {
+ /*
+ * decrement the TTL on ingress to the LSP
+ */
+ }
+ else if (payload_is_ip6)
+ {
+ /*
+ * decrement the TTL on ingress to the LSP
+ */
+ }
+ else
+ {
+ }
+
+ next0 = mdd0->mdd_dpo.dpoi_next_node;
+ vnet_buffer(b0)->ip.adj_index[VLIB_TX] = mdd0->mdd_dpo.dpoi_index;
+ vnet_buffer(b0)->ip.rpf_id = mdd0->mdd_rpf_id;
+
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ mpls_label_disposition_trace_t *tr =
+ vlib_add_trace (vm, node, b0, sizeof (*tr));
+ tr->mdd = mddi0;
+ }
+
+ vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+ return from_frame->n_vectors;
+}
+
+static u8 *
+format_mpls_label_disposition_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 *);
+ CLIB_UNUSED (mpls_label_disposition_trace_t * t);
+
+ t = va_arg (*args, mpls_label_disposition_trace_t *);
+
+ s = format(s, "disp:%d", t->mdd);
+ return (s);
+}
+
+static uword
+ip4_mpls_label_disposition (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return (mpls_label_disposition_inline(vm, node, frame, 1, 0));
+}
+
+VLIB_REGISTER_NODE (ip4_mpls_label_disposition_node) = {
+ .function = ip4_mpls_label_disposition,
+ .name = "ip4-mpls-label-disposition",
+ .vector_size = sizeof (u32),
+
+ .format_trace = format_mpls_label_disposition_trace,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "ip4-drop",
+ }
+};
+VLIB_NODE_FUNCTION_MULTIARCH (ip4_mpls_label_disposition_node,
+ ip4_mpls_label_disposition)
+
+static uword
+ip6_mpls_label_disposition (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return (mpls_label_disposition_inline(vm, node, frame, 0, 1));
+}
+
+VLIB_REGISTER_NODE (ip6_mpls_label_disposition_node) = {
+ .function = ip6_mpls_label_disposition,
+ .name = "ip6-mpls-label-disposition",
+ .vector_size = sizeof (u32),
+
+ .format_trace = format_mpls_label_disposition_trace,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "ip6-drop",
+ }
+};
+VLIB_NODE_FUNCTION_MULTIARCH (ip6_mpls_label_disposition_node,
+ ip6_mpls_label_disposition)
+
+static void
+mpls_disp_dpo_mem_show (void)
+{
+ fib_show_memory_usage("MPLS label",
+ pool_elts(mpls_disp_dpo_pool),
+ pool_len(mpls_disp_dpo_pool),
+ sizeof(mpls_disp_dpo_t));
+}
+
+const static dpo_vft_t mdd_vft = {
+ .dv_lock = mpls_disp_dpo_lock,
+ .dv_unlock = mpls_disp_dpo_unlock,
+ .dv_format = format_mpls_disp_dpo,
+ .dv_mem_show = mpls_disp_dpo_mem_show,
+};
+
+const static char* const mpls_label_disp_ip4_nodes[] =
+{
+ "ip4-mpls-label-disposition",
+ NULL,
+};
+const static char* const mpls_label_disp_ip6_nodes[] =
+{
+ "ip6-mpls-label-disposition",
+ NULL,
+};
+const static char* const * const mpls_label_disp_nodes[DPO_PROTO_NUM] =
+{
+ [DPO_PROTO_IP4] = mpls_label_disp_ip4_nodes,
+ [DPO_PROTO_IP6] = mpls_label_disp_ip6_nodes,
+};
+
+
+void
+mpls_disp_dpo_module_init (void)
+{
+ dpo_register(DPO_MPLS_DISPOSITION, &mdd_vft, mpls_label_disp_nodes);
+}
Code Review / vpp.git / blobdiff