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authorPavel Kotucek <pkotucek@cisco.com>2017-06-20 14:00:26 +0200
committerJohn Lo <loj@cisco.com>2017-08-01 14:44:13 +0000
commit15ac81c16fba83033090299413a3a2dbb848a0f9 (patch)
treeca9617e0faa21847be31e47c0c65ffc0cacf47eb /src/vnet/ethernet/p2p_ethernet_input.c
parent5b311202b82a827c712d2cb7604c56049266adc9 (diff)
P2P Ethernet
Change-Id: Idb97e573961b3bc2acdeef77582314590795f8c3 Signed-off-by: Pavel Kotucek <pkotucek@cisco.com>
Diffstat (limited to 'src/vnet/ethernet/p2p_ethernet_input.c')
-rw-r--r--src/vnet/ethernet/p2p_ethernet_input.c247
1 files changed, 247 insertions, 0 deletions
diff --git a/src/vnet/ethernet/p2p_ethernet_input.c b/src/vnet/ethernet/p2p_ethernet_input.c
new file mode 100644
index 00000000000..a58b832af14
--- /dev/null
+++ b/src/vnet/ethernet/p2p_ethernet_input.c
@@ -0,0 +1,247 @@
+/*
+ * node.c: p2p ethernet vpp node
+ *
+ * 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 <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vppinfra/error.h>
+
+#include <vnet/ethernet/p2p_ethernet.h>
+
+#include <vppinfra/error.h>
+#include <vppinfra/elog.h>
+
+vlib_node_registration_t p2p_ethernet_input_node;
+
+/* packet trace format function */
+u8 *
+format_p2p_ethernet_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 *);
+ p2p_ethernet_trace_t *t = va_arg (*args, p2p_ethernet_trace_t *);
+
+ vnet_main_t *vnm = &vnet_main;
+ s = format (s, "P2P ethernet: %U -> %U",
+ format_vnet_sw_if_index_name, vnm, t->sw_if_index,
+ format_vnet_sw_if_index_name, vnm, t->p2pe_sw_if_index);
+
+ return s;
+}
+
+#define foreach_p2p_ethernet_error \
+_(HITS, "P2P ethernet incoming packets processed")
+
+typedef enum
+{
+#define _(sym,str) P2PE_ERROR_##sym,
+ foreach_p2p_ethernet_error
+#undef _
+ P2PE_N_ERROR,
+} p2p_ethernet_error_t;
+
+static char *p2p_ethernet_error_strings[] = {
+#define _(sym,string) string,
+ foreach_p2p_ethernet_error
+#undef _
+};
+
+static uword
+p2p_ethernet_input_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ u32 n_trace = vlib_get_trace_count (vm, node);
+ u32 n_left_from, *from, *to_next;
+ u32 next_index;
+ u32 n_p2p_ethernet_packets = 0;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_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)
+ {
+ u32 bi0, bi1;
+ vlib_buffer_t *b0, *b1;
+ u32 next0 = 0, next1 = 0;
+ u32 sw_if_index0, sw_if_index1;
+ ethernet_header_t *en0, *en1;
+ u32 rx0, rx1;
+
+ bi0 = from[0];
+ bi1 = from[1];
+ to_next[0] = bi0;
+ to_next[1] = bi1;
+ from += 2;
+ to_next += 2;
+ n_left_to_next -= 2;
+ n_left_from -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ en0 = vlib_buffer_get_current (b0);
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ en1 = vlib_buffer_get_current (b1);
+ sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
+
+ vnet_feature_next (sw_if_index0, &next0, b0);
+ vnet_feature_next (sw_if_index1, &next1, b1);
+
+ rx0 = p2p_ethernet_lookup (sw_if_index0, en0->src_address);
+ rx1 = p2p_ethernet_lookup (sw_if_index1, en1->src_address);
+
+ if (rx0 != ~0)
+ {
+ /* Send pkt to p2p_ethernet RX interface */
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] = rx0;
+ n_p2p_ethernet_packets += 1;
+
+ if (PREDICT_FALSE (n_trace > 0))
+ {
+ p2p_ethernet_trace_t *t0;
+ vlib_trace_buffer (vm, node, next_index, b0,
+ 1 /* follow_chain */ );
+ vlib_set_trace_count (vm, node, --n_trace);
+ t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
+ t0->sw_if_index = sw_if_index0;
+ t0->p2pe_sw_if_index = rx0;
+ }
+ }
+ if (rx1 != ~0)
+ {
+ /* Send pkt to p2p_ethernet RX interface */
+ vnet_buffer (b1)->sw_if_index[VLIB_RX] = rx1;
+ n_p2p_ethernet_packets += 1;
+
+ if (PREDICT_FALSE (n_trace > 0))
+ {
+ p2p_ethernet_trace_t *t1;
+ vlib_trace_buffer (vm, node, next_index, b1,
+ 1 /* follow_chain */ );
+ vlib_set_trace_count (vm, node, --n_trace);
+ t1 = vlib_add_trace (vm, node, b1, sizeof (*t1));
+ t1->sw_if_index = sw_if_index1;
+ t1->p2pe_sw_if_index = rx1;
+ }
+ }
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi1, next1);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0 = 0;
+ u32 sw_if_index0;
+ ethernet_header_t *en0;
+ u32 rx0;
+
+ 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);
+
+ en0 = vlib_buffer_get_current (b0);
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+
+ vnet_feature_next (sw_if_index0, &next0, b0);
+
+ rx0 = p2p_ethernet_lookup (sw_if_index0, en0->src_address);
+ if (rx0 != ~0)
+ {
+ /* Send pkt to p2p_ethernet RX interface */
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] = rx0;
+ n_p2p_ethernet_packets += 1;
+
+ if (PREDICT_FALSE (n_trace > 0))
+ {
+ p2p_ethernet_trace_t *t0;
+ vlib_trace_buffer (vm, node, next_index, b0,
+ 1 /* follow_chain */ );
+ vlib_set_trace_count (vm, node, --n_trace);
+ t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
+ t0->sw_if_index = sw_if_index0;
+ t0->p2pe_sw_if_index = rx0;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE (n_trace > 0))
+ {
+ node->flags |= VLIB_NODE_FLAG_TRACE;
+ }
+ }
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ 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);
+ }
+
+ vlib_node_increment_counter (vm, p2p_ethernet_input_node.index,
+ P2PE_ERROR_HITS, n_p2p_ethernet_packets);
+ return frame->n_vectors;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (p2p_ethernet_input_node) = {
+ .function = p2p_ethernet_input_node_fn,
+ .name = "p2p-ethernet-input",
+ .vector_size = sizeof (u32),
+ .format_trace = format_p2p_ethernet_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(p2p_ethernet_error_strings),
+ .error_strings = p2p_ethernet_error_strings,
+
+ .n_next_nodes = 1,
+
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (p2p_ethernet_input_node,
+ p2p_ethernet_input_node_fn)
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */