From 757585db71b78c4edf91ba011be419264de43d1a Mon Sep 17 00:00:00 2001 From: Damjan Marion Date: Thu, 20 Apr 2017 11:42:28 +0200 Subject: Move emacs stuff to extras/ Change-Id: Ibbb7d8500e9064215cf912bd00bdf72a748f8a27 Signed-off-by: Damjan Marion --- extras/emacs/plugin-node-skel.el | 330 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 330 insertions(+) create mode 100644 extras/emacs/plugin-node-skel.el (limited to 'extras/emacs/plugin-node-skel.el') diff --git a/extras/emacs/plugin-node-skel.el b/extras/emacs/plugin-node-skel.el new file mode 100644 index 00000000..167519aa --- /dev/null +++ b/extras/emacs/plugin-node-skel.el @@ -0,0 +1,330 @@ +;;; plugin-node-skel.el - vpp engine plug-in "node.c" skeleton +;;; +;;; 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. + +(require 'skeleton) + +(define-skeleton skel-plugin-node +"Insert a plug-in 'node.c' skeleton " +nil +'(if (not (boundp 'plugin-name)) + (setq plugin-name (read-string "Plugin name: "))) +'(setq PLUGIN-NAME (upcase plugin-name)) +'(setq capital-oh-en "ON") +"/* + * node.c - skeleton vpp engine plug-in dual-loop node skeleton + * + * Copyright (c) + * 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 +#include +#include +#include +#include <" plugin-name "/" plugin-name ".h> + +typedef struct +{ + u32 next_index; + u32 sw_if_index; + u8 new_src_mac[6]; + u8 new_dst_mac[6]; +} " plugin-name "_trace_t; + +static u8 * +format_mac_address (u8 * s, va_list * args) +{ + u8 *a = va_arg (*args, u8 *); + return format (s, \"%02x:%02x:%02x:%02x:%02x:%02x\", + a[0], a[1], a[2], a[3], a[4], a[5]); +} + +/* packet trace format function */ +static u8 * format_" plugin-name "_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 *); + " plugin-name "_trace_t * t = va_arg (*args, " plugin-name "_trace_t *); + + s = format (s, \"" PLUGIN-NAME ": sw_if_index %d, next index %d\\n\", + t->sw_if_index, t->next_index); + s = format (s, \" new src %U -> new dst %U\", + format_mac_address, t->new_src_mac, + format_mac_address, t->new_dst_mac); + return s; +} + +vlib_node_registration_t " plugin-name "_node; + +#define foreach_" plugin-name "_error \\ +_(SWAPPED, \"Mac swap packets processed\") + +typedef enum { +#define _(sym,str) " PLUGIN-NAME "_ERROR_##sym, + foreach_" plugin-name "_error +#undef _ + " PLUGIN-NAME "_N_ERROR, +} " plugin-name "_error_t; + +static char * " plugin-name "_error_strings[] = { +#define _(sym,string) string, + foreach_" plugin-name "_error +#undef _ +}; + +typedef enum +{ + " PLUGIN-NAME "_NEXT_INTERFACE_OUTPUT, + " PLUGIN-NAME "_N_NEXT, +} " plugin-name "_next_t; + +#define foreach_mac_address_offset \\ +_(0) \\ +_(1) \\ +_(2) \\ +_(3) \\ +_(4) \\ +_(5) + +static uword +" plugin-name "_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + u32 n_left_from, * from, * to_next; + " plugin-name "_next_t next_index; + u32 pkts_swapped = 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 next0 = " PLUGIN-NAME "_NEXT_INTERFACE_OUTPUT; + u32 next1 = " PLUGIN-NAME "_NEXT_INTERFACE_OUTPUT; + u32 sw_if_index0, sw_if_index1; + u8 tmp0[6], tmp1[6]; + ethernet_header_t *en0, *en1; + u32 bi0, bi1; + vlib_buffer_t * b0, * b1; + + /* 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, LOAD); + vlib_prefetch_buffer_header (p3, LOAD); + + CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE); + CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE); + } + + /* speculatively enqueue b0 and b1 to the current next frame */ + to_next[0] = bi0 = from[0]; + to_next[1] = bi1 = from[1]; + 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); + + ASSERT (b0->current_data == 0); + ASSERT (b1->current_data == 0); + + en0 = vlib_buffer_get_current (b0); + en1 = vlib_buffer_get_current (b1); + + /* This is not the fastest way to swap src + dst mac addresses */ +#define _(a) tmp0[a] = en0->src_address[a]; + foreach_mac_address_offset; +#undef _ +#define _(a) en0->src_address[a] = en0->dst_address[a]; + foreach_mac_address_offset; +#undef _ +#define _(a) en0->dst_address[a] = tmp0[a]; + foreach_mac_address_offset; +#undef _ + +#define _(a) tmp1[a] = en1->src_address[a]; + foreach_mac_address_offset; +#undef _ +#define _(a) en1->src_address[a] = en1->dst_address[a]; + foreach_mac_address_offset; +#undef _ +#define _(a) en1->dst_address[a] = tmp1[a]; + foreach_mac_address_offset; +#undef _ + + sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX]; + + /* Send pkt back out the RX interface */ + vnet_buffer(b0)->sw_if_index[VLIB_TX] = sw_if_index0; + vnet_buffer(b1)->sw_if_index[VLIB_TX] = sw_if_index1; + + pkts_swapped += 2; + + if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE))) + { + if (b0->flags & VLIB_BUFFER_IS_TRACED) + { + " plugin-name "_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + clib_memcpy (t->new_src_mac, en0->src_address, + sizeof (t->new_src_mac)); + clib_memcpy (t->new_dst_mac, en0->dst_address, + sizeof (t->new_dst_mac)); + } + if (b1->flags & VLIB_BUFFER_IS_TRACED) + { + " plugin-name "_trace_t *t = + vlib_add_trace (vm, node, b1, sizeof (*t)); + t->sw_if_index = sw_if_index1; + t->next_index = next1; + clib_memcpy (t->new_src_mac, en1->src_address, + sizeof (t->new_src_mac)); + clib_memcpy (t->new_dst_mac, en1->dst_address, + sizeof (t->new_dst_mac)); + } + } + + /* verify speculative enqueues, maybe switch current next frame */ + 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) + { + u32 bi0; + vlib_buffer_t * b0; + u32 next0 = " PLUGIN-NAME "_NEXT_INTERFACE_OUTPUT; + u32 sw_if_index0; + u8 tmp0[6]; + ethernet_header_t *en0; + + /* speculatively enqueue b0 to the current next frame */ + 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); + /* + * Direct from the driver, we should be at offset 0 + * aka at &b0->data[0] + */ + ASSERT (b0->current_data == 0); + + en0 = vlib_buffer_get_current (b0); + + /* This is not the fastest way to swap src + dst mac addresses */ +#define _(a) tmp0[a] = en0->src_address[a]; + foreach_mac_address_offset; +#undef _ +#define _(a) en0->src_address[a] = en0->dst_address[a]; + foreach_mac_address_offset; +#undef _ +#define _(a) en0->dst_address[a] = tmp0[a]; + foreach_mac_address_offset; +#undef _ + + sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + + /* Send pkt back out the RX interface */ + vnet_buffer(b0)->sw_if_index[VLIB_TX] = sw_if_index0; + + if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) { + " plugin-name "_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + clib_memcpy (t->new_src_mac, en0->src_address, + sizeof (t->new_src_mac)); + clib_memcpy (t->new_dst_mac, en0->dst_address, + sizeof (t->new_dst_mac)); + } + + pkts_swapped += 1; + + /* 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, " plugin-name "_node.index, + " PLUGIN-NAME "_ERROR_SWAPPED, pkts_swapped); + return frame->n_vectors; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (" plugin-name "_node) = +{ + .function = " plugin-name "_node_fn, + .name = \"" plugin-name "\", + .vector_size = sizeof (u32), + .format_trace = format_" plugin-name "_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(" plugin-name "_error_strings), + .error_strings = " plugin-name "_error_strings, + + .n_next_nodes = " PLUGIN-NAME "_N_NEXT, + + /* edit / add dispositions here */ + .next_nodes = { + [" PLUGIN-NAME "_NEXT_INTERFACE_OUTPUT] = \"interface-output\", + }, +}; +/* *INDENT-ON* */ +/* + * fd.io coding-style-patch-verification: " capital-oh-en " + * + * Local Variables: + * eval: (c-set-style \"gnu\") + * End: + */ +") -- cgit 1.2.3-korg