diff options
Diffstat (limited to 'src/plugins/nsh/nsh_pop.c')
| -rw-r--r-- | src/plugins/nsh/nsh_pop.c | 365 |
1 files changed, 365 insertions, 0 deletions
diff --git a/src/plugins/nsh/nsh_pop.c b/src/plugins/nsh/nsh_pop.c new file mode 100644 index 00000000000..cd25bb9e3f7 --- /dev/null +++ b/src/plugins/nsh/nsh_pop.c @@ -0,0 +1,365 @@ +/* + * nsh_pop.c - nsh POP only processing + * + * Copyright (c) 2017 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/vnet.h> +#include <vnet/plugin/plugin.h> +#include <nsh/nsh.h> +#include <vnet/gre/gre.h> +#include <vnet/vxlan/vxlan.h> +#include <vnet/vxlan-gpe/vxlan_gpe.h> +#include <vnet/l2/l2_classify.h> + +#include <vlibapi/api.h> +#include <vlibmemory/api.h> + +extern nsh_option_map_t * nsh_md2_lookup_option (u16 class, u8 type); + +extern u8 * format_nsh_header (u8 * s, va_list * args); +extern u8 * format_nsh_node_map_trace (u8 * s, va_list * args); + +/* format from network order */ +u8 * format_nsh_pop_header (u8 * s, va_list * args) +{ + return format_nsh_header(s, args); +} + + + +u8 * format_nsh_pop_node_map_trace (u8 * s, va_list * args) +{ + return format_nsh_node_map_trace(s, args); +} + + +static uword +nsh_pop_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + u32 n_left_from, next_index, *from, *to_next; + nsh_main_t * nm = &nsh_main; + + from = vlib_frame_vector_args(from_frame); + n_left_from = 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 = NSH_NODE_NEXT_DROP, next1 = NSH_NODE_NEXT_DROP; + uword * entry0, *entry1; + nsh_base_header_t * hdr0 = 0, *hdr1 = 0; + u32 header_len0 = 0, header_len1 = 0; + u32 nsp_nsi0, nsp_nsi1; + u32 error0, error1; + nsh_map_t * map0 = 0, *map1 = 0; + + /* 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, 2*CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH(p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD); + } + + bi0 = from[0]; + bi1 = from[1]; + to_next[0] = bi0; + to_next[1] = bi1; + from += 2; + to_next += 2; + n_left_from -= 2; + n_left_to_next -= 2; + + error0 = 0; + error1 = 0; + + b0 = vlib_get_buffer(vm, bi0); + b1 = vlib_get_buffer(vm, bi1); + hdr0 = vlib_buffer_get_current(b0); + nsp_nsi0 = hdr0->nsp_nsi; + header_len0 = hdr0->length * 4; + + hdr1 = vlib_buffer_get_current(b1); + nsp_nsi1 = hdr1->nsp_nsi; + header_len1 = hdr1->length * 4; + + /* Process packet 0 */ + entry0 = hash_get_mem(nm->nsh_mapping_by_key, &nsp_nsi0); + if (PREDICT_FALSE(entry0 == 0)) + { + error0 = NSH_NODE_ERROR_NO_MAPPING; + goto trace0; + } + + /* Entry should point to a mapping ...*/ + map0 = pool_elt_at_index(nm->nsh_mappings, entry0[0]); + if (PREDICT_FALSE(map0 == 0)) + { + error0 = NSH_NODE_ERROR_NO_MAPPING; + goto trace0; + } + + /* set up things for next node to transmit ie which node to handle it and where */ + next0 = map0->next_node; + //vnet_buffer(b0)->sw_if_index[VLIB_TX] = map0->sw_if_index; + + if(PREDICT_FALSE(map0->nsh_action == NSH_ACTION_POP)) + { + /* Manipulate MD2 */ + if(PREDICT_FALSE(hdr0->md_type == 2)) + { + if (PREDICT_FALSE(next0 == NSH_NODE_NEXT_DROP)) + { + error0 = NSH_NODE_ERROR_INVALID_OPTIONS; + goto trace0; + } + //vnet_buffer(b0)->sw_if_index[VLIB_RX] = map0->sw_if_index; + } + + /* Pop NSH header */ + vlib_buffer_advance(b0, (word)header_len0); + goto trace0; + } + + entry0 = hash_get_mem(nm->nsh_entry_by_key, &map0->mapped_nsp_nsi); + if (PREDICT_FALSE(entry0 == 0)) + { + error0 = NSH_NODE_ERROR_NO_ENTRY; + goto trace0; + } + + trace0: b0->error = error0 ? node->errors[error0] : 0; + + if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) + { + nsh_input_trace_t *tr = vlib_add_trace(vm, node, b0, sizeof(*tr)); + clib_memcpy ( &(tr->trace_data), hdr0, (hdr0->length*4) ); + } + + /* Process packet 1 */ + entry1 = hash_get_mem(nm->nsh_mapping_by_key, &nsp_nsi1); + if (PREDICT_FALSE(entry1 == 0)) + { + error1 = NSH_NODE_ERROR_NO_MAPPING; + goto trace1; + } + + /* Entry should point to a mapping ...*/ + map1 = pool_elt_at_index(nm->nsh_mappings, entry1[0]); + if (PREDICT_FALSE(map1 == 0)) + { + error1 = NSH_NODE_ERROR_NO_MAPPING; + goto trace1; + } + + /* set up things for next node to transmit ie which node to handle it and where */ + next1 = map1->next_node; + //vnet_buffer(b1)->sw_if_index[VLIB_TX] = map1->sw_if_index; + + if(PREDICT_FALSE(map1->nsh_action == NSH_ACTION_POP)) + { + /* Manipulate MD2 */ + if(PREDICT_FALSE(hdr1->md_type == 2)) + { + if (PREDICT_FALSE(next1 == NSH_NODE_NEXT_DROP)) + { + error1 = NSH_NODE_ERROR_INVALID_OPTIONS; + goto trace1; + } + //vnet_buffer(b1)->sw_if_index[VLIB_RX] = map1->sw_if_index; + } + + /* Pop NSH header */ + vlib_buffer_advance(b1, (word)header_len1); + goto trace1; + } + + entry1 = hash_get_mem(nm->nsh_entry_by_key, &map1->mapped_nsp_nsi); + if (PREDICT_FALSE(entry1 == 0)) + { + error1 = NSH_NODE_ERROR_NO_ENTRY; + goto trace1; + } + + + trace1: b1->error = error1 ? node->errors[error1] : 0; + + if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED)) + { + nsh_input_trace_t *tr = vlib_add_trace(vm, node, b1, sizeof(*tr)); + clib_memcpy ( &(tr->trace_data), hdr1, (hdr1->length*4) ); + } + + 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 = 0; + vlib_buffer_t * b0 = NULL; + u32 next0 = NSH_NODE_NEXT_DROP; + uword * entry0; + nsh_base_header_t * hdr0 = 0; + u32 header_len0 = 0; + u32 nsp_nsi0; + u32 error0; + nsh_map_t * map0 = 0; + + bi0 = from[0]; + to_next[0] = bi0; + from += 1; + to_next += 1; + n_left_from -= 1; + n_left_to_next -= 1; + error0 = 0; + + b0 = vlib_get_buffer(vm, bi0); + hdr0 = vlib_buffer_get_current(b0); + + nsp_nsi0 = hdr0->nsp_nsi; + header_len0 = hdr0->length * 4; + + entry0 = hash_get_mem(nm->nsh_mapping_by_key, &nsp_nsi0); + + if (PREDICT_FALSE(entry0 == 0)) + { + error0 = NSH_NODE_ERROR_NO_MAPPING; + goto trace00; + } + + /* Entry should point to a mapping ...*/ + map0 = pool_elt_at_index(nm->nsh_mappings, entry0[0]); + + if (PREDICT_FALSE(map0 == 0)) + { + error0 = NSH_NODE_ERROR_NO_MAPPING; + goto trace00; + } + + /* set up things for next node to transmit ie which node to handle it and where */ + next0 = map0->next_node; + //vnet_buffer(b0)->sw_if_index[VLIB_TX] = map0->sw_if_index; + + if(PREDICT_FALSE(map0->nsh_action == NSH_ACTION_POP)) + { + /* Manipulate MD2 */ + if(PREDICT_FALSE(hdr0->md_type == 2)) + { + if (PREDICT_FALSE(next0 == NSH_NODE_NEXT_DROP)) + { + error0 = NSH_NODE_ERROR_INVALID_OPTIONS; + goto trace00; + } + //vnet_buffer(b0)->sw_if_index[VLIB_RX] = map0->sw_if_index; + } + + /* Pop NSH header */ + vlib_buffer_advance(b0, (word)header_len0); + goto trace00; + } + + entry0 = hash_get_mem(nm->nsh_entry_by_key, &map0->mapped_nsp_nsi); + if (PREDICT_FALSE(entry0 == 0)) + { + error0 = NSH_NODE_ERROR_NO_ENTRY; + goto trace00; + } + + trace00: b0->error = error0 ? node->errors[error0] : 0; + + if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) + { + nsh_input_trace_t *tr = vlib_add_trace(vm, node, b0, sizeof(*tr)); + clib_memcpy ( &(tr->trace_data[0]), hdr0, (hdr0->length*4) ); + } + + 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); + + } + + return from_frame->n_vectors; +} + +/** + * @brief Graph processing dispatch function for NSH Input + * + * @node nsh_input + * @param *vm + * @param *node + * @param *from_frame + * + * @return from_frame->n_vectors + * + */ +static uword +nsh_pop (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + return nsh_pop_inline (vm, node, from_frame); +} + +static char * nsh_pop_node_error_strings[] = { +#define _(sym,string) string, + foreach_nsh_node_error +#undef _ +}; + +/* register nsh-input node */ +VLIB_REGISTER_NODE (nsh_pop_node) = { + .function = nsh_pop, + .name = "nsh-pop", + .vector_size = sizeof (u32), + .format_trace = format_nsh_pop_node_map_trace, + .format_buffer = format_nsh_pop_header, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(nsh_pop_node_error_strings), + .error_strings = nsh_pop_node_error_strings, + + .n_next_nodes = NSH_NODE_N_NEXT, + + .next_nodes = { +#define _(s,n) [NSH_NODE_NEXT_##s] = n, + foreach_nsh_node_next +#undef _ + }, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (nsh_pop_node, nsh_pop); + + |