fib: Move the adjacency midchain nodes into a separate file

Type: refactor

It's only the nodes that require compiling for each arch,

Signed-off-by: Neale Ranns <neale@graphiant.com>
Change-Id: Ibb2bfc756001735cc10ef0fd8db7e8b8358cf8e2

1 files changed, 241 insertions, 0 deletions

diff --git a/src/vnet/adj/adj_midchain_node.c b/src/vnet/adj/adj_midchain_node.c
new file mode 100644
index 00000000000..170ed19855e
--- /dev/null
+++ b/src/vnet/adj/adj_midchain_node.c
@@ -0,0 +1,241 @@
+/*
+ * 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/adj/adj_internal.h>
+#include <vnet/adj/adj_midchain.h>
+
+/**
+ * @brief Trace data for packets traversing the midchain tx node
+ */
+typedef struct adj_midchain_tx_trace_t_
+{
+    /**
+     * @brief the midchain adj we are traversing
+     */
+    adj_index_t ai;
+} adj_midchain_tx_trace_t;
+
+always_inline uword
+adj_midchain_tx_inline (vlib_main_t * vm,
+			vlib_node_runtime_t * node,
+			vlib_frame_t * frame,
+			int interface_count)
+{
+    vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
+    u16 nexts[VLIB_FRAME_SIZE], *next;
+    u32 * from, n_left, thread_index;
+    vnet_main_t *vnm = vnet_get_main ();
+    vnet_interface_main_t *im = &vnm->interface_main;
+
+    thread_index = vm->thread_index;
+    n_left = frame->n_vectors;
+    from = vlib_frame_vector_args (frame);
+
+    vlib_get_buffers (vm, from, bufs, n_left);
+
+    next = nexts;
+    b = bufs;
+
+    while (n_left > 8)
+    {
+        u32 adj_index0, adj_index1, adj_index2, adj_index3;
+        const ip_adjacency_t *adj0, *adj1, *adj2, *adj3;
+        const dpo_id_t *dpo0, *dpo1, *dpo2, *dpo3;
+
+        /* Prefetch next iteration. */
+        {
+            vlib_prefetch_buffer_header (b[4], LOAD);
+            vlib_prefetch_buffer_header (b[5], LOAD);
+            vlib_prefetch_buffer_header (b[6], LOAD);
+            vlib_prefetch_buffer_header (b[7], LOAD);
+        }
+
+        /* Follow the DPO on which the midchain is stacked */
+        adj_index0 = vnet_buffer(b[0])->ip.adj_index[VLIB_TX];
+        adj_index1 = vnet_buffer(b[1])->ip.adj_index[VLIB_TX];
+        adj_index2 = vnet_buffer(b[2])->ip.adj_index[VLIB_TX];
+        adj_index3 = vnet_buffer(b[3])->ip.adj_index[VLIB_TX];
+
+        adj0 = adj_get(adj_index0);
+        adj1 = adj_get(adj_index1);
+        adj2 = adj_get(adj_index2);
+        adj3 = adj_get(adj_index3);
+
+        dpo0 = &adj0->sub_type.midchain.next_dpo;
+        dpo1 = &adj1->sub_type.midchain.next_dpo;
+        dpo2 = &adj2->sub_type.midchain.next_dpo;
+        dpo3 = &adj3->sub_type.midchain.next_dpo;
+
+        next[0] = dpo0->dpoi_next_node;
+        next[1] = dpo1->dpoi_next_node;
+        next[2] = dpo2->dpoi_next_node;
+        next[3] = dpo3->dpoi_next_node;
+
+        vnet_buffer(b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
+        vnet_buffer(b[1])->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
+        vnet_buffer(b[2])->ip.adj_index[VLIB_TX] = dpo2->dpoi_index;
+        vnet_buffer(b[3])->ip.adj_index[VLIB_TX] = dpo3->dpoi_index;
+
+        if (interface_count)
+        {
+            vlib_increment_combined_counter (im->combined_sw_if_counters
+                                             + VNET_INTERFACE_COUNTER_TX,
+                                             thread_index,
+                                             adj0->rewrite_header.sw_if_index,
+                                             1,
+                                             vlib_buffer_length_in_chain (vm, b[0]));
+            vlib_increment_combined_counter (im->combined_sw_if_counters
+                                             + VNET_INTERFACE_COUNTER_TX,
+                                             thread_index,
+                                             adj1->rewrite_header.sw_if_index,
+                                             1,
+                                             vlib_buffer_length_in_chain (vm, b[1]));
+            vlib_increment_combined_counter (im->combined_sw_if_counters
+                                             + VNET_INTERFACE_COUNTER_TX,
+                                             thread_index,
+                                             adj2->rewrite_header.sw_if_index,
+                                             1,
+                                             vlib_buffer_length_in_chain (vm, b[2]));
+            vlib_increment_combined_counter (im->combined_sw_if_counters
+                                             + VNET_INTERFACE_COUNTER_TX,
+                                             thread_index,
+                                             adj3->rewrite_header.sw_if_index,
+                                             1,
+                                             vlib_buffer_length_in_chain (vm, b[3]));
+        }
+
+        if (PREDICT_FALSE(node->flags & VLIB_NODE_FLAG_TRACE))
+        {
+            if (PREDICT_FALSE(b[0]->flags & VLIB_BUFFER_IS_TRACED))
+            {
+                adj_midchain_tx_trace_t *tr = vlib_add_trace (vm, node,
+                                                              b[0], sizeof (*tr));
+                tr->ai = adj_index0;
+            }
+            if (PREDICT_FALSE(b[1]->flags & VLIB_BUFFER_IS_TRACED))
+            {
+                adj_midchain_tx_trace_t *tr = vlib_add_trace (vm, node,
+                                                              b[1], sizeof (*tr));
+                tr->ai = adj_index1;
+            }
+            if (PREDICT_FALSE(b[2]->flags & VLIB_BUFFER_IS_TRACED))
+            {
+                adj_midchain_tx_trace_t *tr = vlib_add_trace (vm, node,
+                                                              b[2], sizeof (*tr));
+                tr->ai = adj_index2;
+            }
+            if (PREDICT_FALSE(b[3]->flags & VLIB_BUFFER_IS_TRACED))
+            {
+                adj_midchain_tx_trace_t *tr = vlib_add_trace (vm, node,
+                                                              b[3], sizeof (*tr));
+                tr->ai = adj_index3;
+            }
+        }
+        n_left -= 4;
+        b += 4;
+        next += 4;
+    }
+
+    while (n_left)
+    {
+        const ip_adjacency_t * adj0;
+        const dpo_id_t *dpo0;
+        u32 adj_index0;
+
+        /* Follow the DPO on which the midchain is stacked */
+        adj_index0 = vnet_buffer(b[0])->ip.adj_index[VLIB_TX];
+        adj0 = adj_get(adj_index0);
+        dpo0 = &adj0->sub_type.midchain.next_dpo;
+        next[0] = dpo0->dpoi_next_node;
+        vnet_buffer(b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
+
+        if (interface_count)
+        {
+            vlib_increment_combined_counter (im->combined_sw_if_counters
+                                             + VNET_INTERFACE_COUNTER_TX,
+                                             thread_index,
+                                             adj0->rewrite_header.sw_if_index,
+                                             1,
+                                             vlib_buffer_length_in_chain (vm, b[0]));
+        }
+
+        if (PREDICT_FALSE(b[0]->flags & VLIB_BUFFER_IS_TRACED))
+        {
+            adj_midchain_tx_trace_t *tr = vlib_add_trace (vm, node,
+                                                          b[0], sizeof (*tr));
+            tr->ai = adj_index0;
+        }
+
+        n_left -= 1;
+        b += 1;
+        next += 1;
+    }
+
+    vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
+
+    return frame->n_vectors;
+}
+
+static u8 *
+format_adj_midchain_tx_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 *);
+    adj_midchain_tx_trace_t *tr = va_arg (*args, adj_midchain_tx_trace_t*);
+
+    s = format(s, "adj-midchain:[%d]:%U", tr->ai,
+	       format_ip_adjacency, tr->ai,
+	       FORMAT_IP_ADJACENCY_NONE);
+
+    return (s);
+}
+
+static uword
+adj_midchain_tx (vlib_main_t * vm,
+		 vlib_node_runtime_t * node,
+		 vlib_frame_t * frame)
+{
+    return (adj_midchain_tx_inline(vm, node, frame, 1));
+}
+
+VLIB_REGISTER_NODE (adj_midchain_tx_node) = {
+    .function = adj_midchain_tx,
+    .name = "adj-midchain-tx",
+    .vector_size = sizeof (u32),
+
+    .format_trace = format_adj_midchain_tx_trace,
+
+    .n_next_nodes = 1,
+    .next_nodes = {
+	[0] = "error-drop",
+    },
+};
+
+static uword
+adj_midchain_tx_no_count (vlib_main_t * vm,
+			  vlib_node_runtime_t * node,
+			  vlib_frame_t * frame)
+{
+    return (adj_midchain_tx_inline(vm, node, frame, 0));
+}
+
+VLIB_REGISTER_NODE (adj_midchain_tx_no_count_node) = {
+    .function = adj_midchain_tx_no_count,
+    .name = "adj-midchain-tx-no-count",
+    .vector_size = sizeof (u32),
+
+    .format_trace = format_adj_midchain_tx_trace,
+    .sibling_of = "adj-midchain-tx",
+};