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authorNeale Ranns <nranns@cisco.com>2019-05-22 13:26:39 +0000
committerDamjan Marion <dmarion@me.com>2019-06-05 11:33:12 +0000
commit59fa121f8953f7b07f0cc02149ca28182f959f42 (patch)
tree51249a3bf2da047a791b7446af09f15df91118a6 /src/plugins/l3xc/l3xc_node.c
parente6be702362299566990678f505512b1b74b49112 (diff)
L3 cross connect
- all packets input on interface X are load-balanced over the set of paths provided. Change-Id: Ic27cb88c4cd5d6d3462570632daff7a43d5a652d Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'src/plugins/l3xc/l3xc_node.c')
-rw-r--r--src/plugins/l3xc/l3xc_node.c256
1 files changed, 256 insertions, 0 deletions
diff --git a/src/plugins/l3xc/l3xc_node.c b/src/plugins/l3xc/l3xc_node.c
new file mode 100644
index 00000000000..62db8c328b0
--- /dev/null
+++ b/src/plugins/l3xc/l3xc_node.c
@@ -0,0 +1,256 @@
+/*
+ * Copyright (c) 2019 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 <plugins/l3xc/l3xc.h>
+#include <vnet/feature/feature.h>
+
+typedef enum l3xc_next_t_
+{
+ L3XC_NEXT_DROP,
+ L3XC_N_NEXT,
+} l3xc_next_t;
+
+typedef struct l3xc_input_trace_t_
+{
+ index_t l3xci;
+ index_t lbi;
+} l3xc_input_trace_t;
+
+typedef enum
+{
+#define l3xc_error(n,s) L3XC_ERROR_##n,
+#include "l3xc_error.def"
+#undef l3xc_error
+ L3XC_N_ERROR,
+} l3xc_error_t;
+
+always_inline uword
+l3xc_input_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, fib_protocol_t fproto)
+{
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
+ u16 nexts[VLIB_FRAME_SIZE], *next;
+ u32 n_left, *from;
+
+ from = vlib_frame_vector_args (frame);
+ n_left = frame->n_vectors;
+ b = bufs;
+ next = nexts;
+
+ vlib_get_buffers (vm, from, bufs, n_left);
+
+ while (n_left >= 8)
+ {
+ const l3xc_t *l3xc0, *l3xc1, *l3xc2, *l3xc3;
+ u32 l3xci0, l3xci1, l3xci2, l3xci3;
+ u32 next_u32;
+
+ /* 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);
+ }
+
+ l3xci0 =
+ *(u32 *) vnet_feature_next_with_data (&next_u32, b[0],
+ sizeof (l3xci0));
+ l3xci1 =
+ *(u32 *) vnet_feature_next_with_data (&next_u32, b[1],
+ sizeof (l3xci1));
+ l3xci2 =
+ *(u32 *) vnet_feature_next_with_data (&next_u32, b[2],
+ sizeof (l3xci2));
+ l3xci3 =
+ *(u32 *) vnet_feature_next_with_data (&next_u32, b[3],
+ sizeof (l3xci3));
+
+ l3xc0 = l3xc_get (l3xci0);
+ l3xc1 = l3xc_get (l3xci1);
+ l3xc2 = l3xc_get (l3xci2);
+ l3xc3 = l3xc_get (l3xci3);
+
+ next[0] = l3xc0->l3xc_dpo.dpoi_next_node;
+ next[1] = l3xc1->l3xc_dpo.dpoi_next_node;
+ next[2] = l3xc2->l3xc_dpo.dpoi_next_node;
+ next[3] = l3xc3->l3xc_dpo.dpoi_next_node;
+
+ vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = l3xc0->l3xc_dpo.dpoi_index;
+ vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = l3xc1->l3xc_dpo.dpoi_index;
+ vnet_buffer (b[2])->ip.adj_index[VLIB_TX] = l3xc2->l3xc_dpo.dpoi_index;
+ vnet_buffer (b[3])->ip.adj_index[VLIB_TX] = l3xc3->l3xc_dpo.dpoi_index;
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
+ {
+ if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ l3xc_input_trace_t *tr;
+
+ tr = vlib_add_trace (vm, node, b[0], sizeof (*tr));
+ tr->l3xci = l3xci0;
+ tr->lbi = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
+ }
+ if (PREDICT_FALSE (b[1]->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ l3xc_input_trace_t *tr;
+
+ tr = vlib_add_trace (vm, node, b[1], sizeof (*tr));
+ tr->l3xci = l3xci1;
+ tr->lbi = vnet_buffer (b[1])->ip.adj_index[VLIB_TX];
+ }
+ if (PREDICT_FALSE (b[2]->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ l3xc_input_trace_t *tr;
+
+ tr = vlib_add_trace (vm, node, b[2], sizeof (*tr));
+ tr->l3xci = l3xci2;
+ tr->lbi = vnet_buffer (b[2])->ip.adj_index[VLIB_TX];
+ }
+ if (PREDICT_FALSE (b[3]->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ l3xc_input_trace_t *tr;
+
+ tr = vlib_add_trace (vm, node, b[3], sizeof (*tr));
+ tr->l3xci = l3xci3;
+ tr->lbi = vnet_buffer (b[3])->ip.adj_index[VLIB_TX];
+ }
+ }
+
+ b += 4;
+ next += 4;
+ n_left -= 4;
+ }
+
+ while (n_left > 0)
+ {
+ u32 l3xci0, next_u32;
+ const l3xc_t *l3xc0;
+
+ l3xci0 =
+ *(u32 *) vnet_feature_next_with_data (&next_u32, b[0],
+ sizeof (l3xci0));
+
+ l3xc0 = l3xc_get (l3xci0);
+
+ next[0] = l3xc0->l3xc_dpo.dpoi_next_node;
+
+ vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = l3xc0->l3xc_dpo.dpoi_index;
+
+ if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ l3xc_input_trace_t *tr;
+
+ tr = vlib_add_trace (vm, node, b[0], sizeof (*tr));
+ tr->l3xci = l3xci0;
+ tr->lbi = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
+ }
+
+ b += 1;
+ next += 1;
+ n_left -= 1;
+ }
+
+ vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
+ return frame->n_vectors;
+}
+
+static uword
+l3xc_input_ip4 (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return l3xc_input_inline (vm, node, frame, FIB_PROTOCOL_IP4);
+}
+
+static uword
+l3xc_input_ip6 (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return l3xc_input_inline (vm, node, frame, FIB_PROTOCOL_IP6);
+}
+
+static u8 *
+format_l3xc_input_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 *);
+ l3xc_input_trace_t *t = va_arg (*args, l3xc_input_trace_t *);
+
+ s = format (s, "l3xc-index:%d lb-index:%d", t->l3xci, t->lbi);
+ return s;
+}
+
+static char *l3xc_error_strings[] = {
+#define l3xc_error(n,s) s,
+#include "l3xc_error.def"
+#undef l3xc_error
+};
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (l3xc_ip4_node) =
+{
+ .function = l3xc_input_ip4,
+ .name = "l3xc-input-ip4",
+ .vector_size = sizeof (u32),
+ .format_trace = format_l3xc_input_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = L3XC_N_ERROR,
+ .error_strings = l3xc_error_strings,
+ .n_next_nodes = L3XC_N_NEXT,
+ .next_nodes =
+ {
+ [L3XC_NEXT_DROP] = "error-drop",
+ }
+};
+
+VLIB_REGISTER_NODE (l3xc_ip6_node) =
+{
+ .function = l3xc_input_ip6,
+ .name = "l3xc-input-ip6",
+ .vector_size = sizeof (u32),
+ .format_trace = format_l3xc_input_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = 0,
+ .n_next_nodes = L3XC_N_NEXT,
+
+ .next_nodes =
+ {
+ [L3XC_NEXT_DROP] = "error-drop",
+ }
+};
+
+VNET_FEATURE_INIT (l3xc_ip4_feat, static) =
+{
+ .arc_name = "ip4-unicast",
+ .node_name = "l3xc-input-ip4",
+ .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
+};
+
+VNET_FEATURE_INIT (l3xc_ip6_feat, static) =
+{
+ .arc_name = "ip6-unicast",
+ .node_name = "l3xc-input-ip6",
+ .runs_after = VNET_FEATURES ("acl-plugin-in-ip6-fa"),
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */