srv6-mobile - vpp - Vector Packet Processing

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author	Tetsuya Murakami <tetsuya.mrk@gmail.com>	2019-11-06 11:05:51 -0800
committer	Ole Trøan <otroan@employees.org>	2019-11-19 07:02:40 +0000
commit	1b81e6ef66cbce15ba1b05904732f92251d531cd (patch)
tree	114135a6f83405d4883bcb37f1c362051944831a /src/plugins/srv6-mobile/extra/README.md
parent	360b523b52a91bd0d1d7de1247141367c484d70f (diff)

srv6-mobile

Type: feature Plug-in for IPv6 Segment Routing Mobile This funcion was developed by Signed-off-by: Satoru Matsuchima <satoru.matsushima@gmail.com> Signed-off-by: Filip Varga <filipvarga89@gmail.com> Signed-off-by: Tetsuya Murakami <tetsuya.mrk@gmail.com> Signed-off-by: Tetsuya Murakami <tetsuya.mrk@gmail.com> Change-Id: Ie995adc73d8f8d444339aab71619c3599e69f12d Signed-off-by: Tetsuya Murakami <tetsuya.mrk@gmail.com>

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src/plugins/srv6-mobile/extra/README.md

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/* * Copyright (c) 2015 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. */ /* * buffer_node.h: VLIB buffer handling node helper macros/inlines * * Copyright (c) 2008 Eliot Dresselhaus * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #ifndef included_vlib_buffer_node_h #define included_vlib_buffer_node_h /** \file vlib buffer/node functions */ /** \brief Finish enqueueing two buffers forward in the graph. Standard dual loop boilerplate element. This is a MACRO, with MULTIPLE SIDE EFFECTS. In the ideal case, <code>next_index == next0 == next1</code>, which means that the speculative enqueue at the top of the dual loop has correctly dealt with both packets. In that case, the macro does nothing at all. @param vm vlib_main_t pointer, varies by thread @param node current node vlib_node_runtime_t pointer @param next_index speculated next index used for both packets @param to_next speculated vector pointer used for both packets @param n_left_to_next number of slots left in speculated vector @param bi0 first buffer index @param bi1 second buffer index @param next0 actual next index to be used for the first packet @param next1 actual next index to be used for the second packet @return @c next_index -- speculative next index to be used for future packets @return @c to_next -- speculative frame to be used for future packets @return @c n_left_to_next -- number of slots left in speculative frame */ #define vlib_validate_buffer_enqueue_x2(vm,node,next_index,to_next,n_left_to_next,bi0,bi1,next0,next1) \ do { \ int enqueue_code = (next0 != next_index) + 2*(next1 != next_index); \ \ if (PREDICT_FALSE (enqueue_code != 0)) \ { \ switch (enqueue_code) \ { \ case 1: \ /* A B A */ \ to_next[-2] = bi1; \ to_next -= 1; \ n_left_to_next += 1; \ vlib_set_next_frame_buffer (vm, node, next0, bi0); \ break; \ \ case 2: \ /* A A B */ \ to_next -= 1; \ n_left_to_next += 1; \ vlib_set_next_frame_buffer (vm, node, next1, bi1); \ break; \ \ case 3: \ /* A B B or A B C */ \ to_next -= 2; \ n_left_to_next += 2; \ vlib_set_next_frame_buffer (vm, node, next0, bi0); \ vlib_set_next_frame_buffer (vm, node, next1, bi1); \ if (next0 == next1) \ { \ vlib_put_next_frame (vm, node, next_index, \ n_left_to_next); \ next_index = next1; \ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); \ } \ } \ } \ } while (0) /** \brief Finish enqueueing four buffers forward in the graph. Standard quad loop boilerplate element. This is a MACRO, with MULTIPLE SIDE EFFECTS. In the ideal case, <code>next_index == next0 == next1 == next2 == next3</code>, which means that the speculative enqueue at the top of the quad loop has correctly dealt with all four packets. In that case, the macro does nothing at all. @param vm vlib_main_t pointer, varies by thread @param node current node vlib_node_runtime_t pointer @param next_index speculated next index used for both packets @param to_next speculated vector pointer used for both packets @param n_left_to_next number of slots left in speculated vector @param bi0 first buffer index @param bi1 second buffer index @param bi2 third buffer index @param bi3 fourth buffer index @param next0 actual next index to be used for the first packet @param next1 actual next index to be used for the second packet @param next2 actual next index to be used for the third packet @param next3 actual next index to be used for the fourth packet @return @c next_index -- speculative next index to be used for future packets @return @c to_next -- speculative frame to be used for future packets @return @c n_left_to_next -- number of slots left in speculative frame */ #define vlib_validate_buffer_enqueue_x4(vm,node,next_index,to_next,n_left_to_next,bi0,bi1,bi2,bi3,next0,next1,next2,next3) \ do { \ /* After the fact: check the [speculative] enqueue to "next" */ \ u32 fix_speculation = next_index != next0 || next_index != next1 \ || next_index != next2 || next_index != next3; \ if (PREDICT_FALSE(fix_speculation)) \ { \ /* rewind... */ \ to_next -= 4; \ n_left_to_next += 4; \ \ /* If bi0 belongs to "next", send it there */ \ if (next_index == next0) \ { \ to_next[0] = bi0; \ to_next++; \ n_left_to_next --; \ } \ else /* send it where it needs to go */ \ vlib_set_next_frame_buffer (vm, node, next0, bi0); \ \ if (next_index == next1) \ { \ to_next[0] = bi1; \ to_next++; \ n_left_to_next --; \ } \ else \ vlib_set_next_frame_buffer (vm, node, next1, bi1); \ \ if (next_index == next2) \ { \ to_next[0] = bi2; \ to_next++; \ n_left_to_next --; \ } \ else \ vlib_set_next_frame_buffer (vm, node, next2, bi2); \ \ if (next_index == next3) \ { \ to_next[0] = bi3; \ to_next++; \ n_left_to_next --; \ } \ else \ vlib_set_next_frame_buffer (vm, node, next3, bi3); \ \ /* Change speculation: last 2 packets went to the same node */ \ if (next2 == next3) \ { \ vlib_put_next_frame (vm, node, next_index, n_left_to_next); \ next_index = next3; \ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); \ } \ } \ } while(0); /** \brief Finish enqueueing one buffer forward in the graph. Standard single loop boilerplate element. This is a MACRO, with MULTIPLE SIDE EFFECTS. In the ideal case, <code>next_index == next0</code>, which means that the speculative enqueue at the top of the single loop has correctly dealt with the packet in hand. In that case, the macro does nothing at all. @param vm vlib_main_t pointer, varies by thread @param node current node vlib_node_runtime_t pointer @param next_index speculated next index used for both packets @param to_next speculated vector pointer used for both packets @param n_left_to_next number of slots left in speculated vector @param bi0 first buffer index @param next0 actual next index to be used for the first packet @return @c next_index -- speculative next index to be used for future packets @return @c to_next -- speculative frame to be used for future packets @return @c n_left_to_next -- number of slots left in speculative frame */ #define vlib_validate_buffer_enqueue_x1(vm,node,next_index,to_next,n_left_to_next,bi0,next0) \ do { \ if (PREDICT_FALSE (next0 != next_index)) \ { \ vlib_put_next_frame (vm, node, next_index, n_left_to_next + 1); \ next_index = next0; \ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); \ \ to_next[0] = bi0; \ to_next += 1; \ n_left_to_next -= 1; \ } \ } while (0) always_inline uword generic_buffer_node_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, uword sizeof_trace, void *opaque1, uword opaque2, void (*two_buffers) (vlib_main_t * vm, void *opaque1, uword opaque2, vlib_buffer_t * b0, vlib_buffer_t * b1, u32 * next0, u32 * next1), void (*one_buffer) (vlib_main_t * vm, void *opaque1, uword opaque2, vlib_buffer_t * b0, u32 * next0)) { u32 n_left_from, *from, *to_next; u32 next_index; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; if (node->flags & VLIB_NODE_FLAG_TRACE) vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors, /* stride */ 1, sizeof_trace); 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) { vlib_buffer_t *p0, *p1; u32 pi0, next0; u32 pi1, next1; /* 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, 64, LOAD); CLIB_PREFETCH (p3->data, 64, LOAD); } pi0 = to_next[0] = from[0]; pi1 = to_next[1] = from[1]; from += 2; to_next += 2; n_left_from -= 2; n_left_to_next -= 2; p0 = vlib_get_buffer (vm, pi0); p1 = vlib_get_buffer (vm, pi1); two_buffers (vm, opaque1, opaque2, p0, p1, &next0, &next1); vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next, n_left_to_next, pi0, pi1, next0, next1); } while (n_left_from > 0 && n_left_to_next > 0) { vlib_buffer_t *p0; u32 pi0, next0; pi0 = from[0]; to_next[0] = pi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; p0 = vlib_get_buffer (vm, pi0); one_buffer (vm, opaque1, opaque2, p0, &next0); vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, pi0, next0); } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } return frame->n_vectors; } #endif /* included_vlib_buffer_node_h */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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