diff options
Diffstat (limited to 'vnet/vnet/mpls/mpls_output.c')
| -rw-r--r-- | vnet/vnet/mpls/mpls_output.c | 479 |
1 files changed, 0 insertions, 479 deletions
diff --git a/vnet/vnet/mpls/mpls_output.c b/vnet/vnet/mpls/mpls_output.c deleted file mode 100644 index 8292a0cb3d2..00000000000 --- a/vnet/vnet/mpls/mpls_output.c +++ /dev/null @@ -1,479 +0,0 @@ -/* - * mpls_output.c: MPLS Adj rewrite - * - * Copyright (c) 2012-2014 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/pg/pg.h> -#include <vnet/ip/ip.h> -#include <vnet/mpls/mpls.h> - -typedef struct { - /* Adjacency taken. */ - u32 adj_index; - u32 flow_hash; - - /* Packet data, possibly *after* rewrite. */ - u8 packet_data[64 - 1*sizeof(u32)]; -} mpls_output_trace_t; - -static u8 * -format_mpls_output_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 *); - mpls_output_trace_t * t = va_arg (*args, mpls_output_trace_t *); - vnet_main_t * vnm = vnet_get_main(); - uword indent = format_get_indent (s); - - s = format (s, "adj-idx %d : %U flow hash: 0x%08x", - t->adj_index, - format_ip_adjacency, t->adj_index, FORMAT_IP_ADJACENCY_NONE, - t->flow_hash); - s = format (s, "\n%U%U", - format_white_space, indent, - format_ip_adjacency_packet_data, - vnm, t->adj_index, - t->packet_data, sizeof (t->packet_data)); - return s; -} - -static inline uword -mpls_output_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame, - int is_midchain) -{ - u32 n_left_from, next_index, * from, * to_next, cpu_index; - vlib_node_runtime_t * error_node; - u32 n_left_to_next; - - cpu_index = os_get_cpu_number(); - error_node = vlib_node_get_runtime (vm, mpls_output_node.index); - 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) - { - vlib_get_next_frame (vm, node, next_index, - to_next, n_left_to_next); - - while (n_left_from >= 4 && n_left_to_next >= 2) - { - ip_adjacency_t * adj0; - mpls_unicast_header_t *hdr0; - vlib_buffer_t * p0; - u32 pi0, rw_len0, adj_index0, next0, error0; - - ip_adjacency_t * adj1; - mpls_unicast_header_t *hdr1; - vlib_buffer_t * p1; - u32 pi1, rw_len1, adj_index1, next1, error1; - - /* 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, STORE); - vlib_prefetch_buffer_header (p3, STORE); - - CLIB_PREFETCH (p2->data, sizeof (hdr0[0]), STORE); - CLIB_PREFETCH (p3->data, sizeof (hdr1[0]), STORE); - } - - pi0 = to_next[0] = from[0]; - pi1 = to_next[1] = from[1]; - - from += 2; - n_left_from -= 2; - to_next += 2; - n_left_to_next -= 2; - - p0 = vlib_get_buffer (vm, pi0); - p1 = vlib_get_buffer (vm, pi1); - - adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX]; - adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX]; - - /* We should never rewrite a pkt using the MISS adjacency */ - ASSERT(adj_index0); - ASSERT(adj_index1); - - adj0 = adj_get(adj_index0); - adj1 = adj_get(adj_index1); - hdr0 = vlib_buffer_get_current (p0); - hdr1 = vlib_buffer_get_current (p1); - - /* Guess we are only writing on simple Ethernet header. */ - vnet_rewrite_two_headers (adj0[0], adj1[0], hdr0, hdr1, - sizeof (ethernet_header_t)); - - /* Update packet buffer attributes/set output interface. */ - rw_len0 = adj0[0].rewrite_header.data_bytes; - rw_len1 = adj1[0].rewrite_header.data_bytes; - - if (PREDICT_FALSE (rw_len0 > sizeof(ethernet_header_t))) - vlib_increment_combined_counter - (&adjacency_counters, - cpu_index, adj_index0, - /* packet increment */ 0, - /* byte increment */ rw_len0-sizeof(ethernet_header_t)); - if (PREDICT_FALSE (rw_len1 > sizeof(ethernet_header_t))) - vlib_increment_combined_counter - (&adjacency_counters, - cpu_index, adj_index1, - /* packet increment */ 0, - /* byte increment */ rw_len1-sizeof(ethernet_header_t)); - - /* Check MTU of outgoing interface. */ - if (PREDICT_TRUE(vlib_buffer_length_in_chain (vm, p0) <= - adj0[0].rewrite_header.max_l3_packet_bytes)) - { - p0->current_data -= rw_len0; - p0->current_length += rw_len0; - - vnet_buffer (p0)->sw_if_index[VLIB_TX] = - adj0[0].rewrite_header.sw_if_index; - next0 = adj0[0].rewrite_header.next_index; - error0 = IP4_ERROR_NONE; - - if (is_midchain) - { - adj0->sub_type.midchain.fixup_func(vm, adj0, p0); - } - } - else - { - error0 = IP4_ERROR_MTU_EXCEEDED; - next0 = MPLS_OUTPUT_NEXT_DROP; - } - if (PREDICT_TRUE(vlib_buffer_length_in_chain (vm, p1) <= - adj1[0].rewrite_header.max_l3_packet_bytes)) - { - p1->current_data -= rw_len1; - p1->current_length += rw_len1; - - vnet_buffer (p1)->sw_if_index[VLIB_TX] = - adj1[0].rewrite_header.sw_if_index; - next1 = adj1[0].rewrite_header.next_index; - error1 = IP4_ERROR_NONE; - - if (is_midchain) - { - adj1->sub_type.midchain.fixup_func(vm, adj1, p1); - } - } - else - { - error1 = IP4_ERROR_MTU_EXCEEDED; - next1 = MPLS_OUTPUT_NEXT_DROP; - } - - p0->error = error_node->errors[error0]; - p1->error = error_node->errors[error1]; - - if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED)) - { - mpls_output_trace_t *tr = vlib_add_trace (vm, node, - p0, sizeof (*tr)); - tr->adj_index = vnet_buffer(p0)->ip.adj_index[VLIB_TX]; - tr->flow_hash = vnet_buffer(p0)->ip.flow_hash; - } - if (PREDICT_FALSE(p1->flags & VLIB_BUFFER_IS_TRACED)) - { - mpls_output_trace_t *tr = vlib_add_trace (vm, node, - p1, sizeof (*tr)); - tr->adj_index = vnet_buffer(p1)->ip.adj_index[VLIB_TX]; - tr->flow_hash = vnet_buffer(p1)->ip.flow_hash; - } - - 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) - { - ip_adjacency_t * adj0; - mpls_unicast_header_t *hdr0; - vlib_buffer_t * p0; - u32 pi0, rw_len0, adj_index0, next0, error0; - - pi0 = to_next[0] = from[0]; - - p0 = vlib_get_buffer (vm, pi0); - - adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX]; - - /* We should never rewrite a pkt using the MISS adjacency */ - ASSERT(adj_index0); - - adj0 = adj_get(adj_index0); - hdr0 = vlib_buffer_get_current (p0); - - /* Guess we are only writing on simple Ethernet header. */ - vnet_rewrite_one_header (adj0[0], hdr0, - sizeof (ethernet_header_t)); - - /* Update packet buffer attributes/set output interface. */ - rw_len0 = adj0[0].rewrite_header.data_bytes; - - if (PREDICT_FALSE (rw_len0 > sizeof(ethernet_header_t))) - vlib_increment_combined_counter - (&adjacency_counters, - cpu_index, adj_index0, - /* packet increment */ 0, - /* byte increment */ rw_len0-sizeof(ethernet_header_t)); - - /* Check MTU of outgoing interface. */ - if (PREDICT_TRUE(vlib_buffer_length_in_chain (vm, p0) <= - adj0[0].rewrite_header.max_l3_packet_bytes)) - { - p0->current_data -= rw_len0; - p0->current_length += rw_len0; - - vnet_buffer (p0)->sw_if_index[VLIB_TX] = - adj0[0].rewrite_header.sw_if_index; - next0 = adj0[0].rewrite_header.next_index; - error0 = IP4_ERROR_NONE; - - if (is_midchain) - { - adj0->sub_type.midchain.fixup_func(vm, adj0, p0); - } - } - else - { - error0 = IP4_ERROR_MTU_EXCEEDED; - next0 = MPLS_OUTPUT_NEXT_DROP; - } - p0->error = error_node->errors[error0]; - - from += 1; - n_left_from -= 1; - to_next += 1; - n_left_to_next -= 1; - - if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED)) - { - mpls_output_trace_t *tr = vlib_add_trace (vm, node, - p0, sizeof (*tr)); - tr->adj_index = vnet_buffer(p0)->ip.adj_index[VLIB_TX]; - tr->flow_hash = vnet_buffer(p0)->ip.flow_hash; - } - - 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); - } - vlib_node_increment_counter (vm, mpls_output_node.index, - MPLS_ERROR_PKTS_ENCAP, - from_frame->n_vectors); - - return from_frame->n_vectors; -} - -static char * mpls_error_strings[] = { -#define mpls_error(n,s) s, -#include "error.def" -#undef mpls_error -}; - -static inline uword -mpls_output (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return (mpls_output_inline(vm, node, from_frame, /* is_midchain */ 0)); -} - -VLIB_REGISTER_NODE (mpls_output_node) = { - .function = mpls_output, - .name = "mpls-output", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - .n_errors = MPLS_N_ERROR, - .error_strings = mpls_error_strings, - - .n_next_nodes = MPLS_OUTPUT_N_NEXT, - .next_nodes = { -#define _(s,n) [MPLS_OUTPUT_NEXT_##s] = n, - foreach_mpls_output_next -#undef _ - }, - - .format_trace = format_mpls_output_trace, -}; - -VLIB_NODE_FUNCTION_MULTIARCH (mpls_output_node, mpls_output) - -static inline uword -mpls_midchain (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return (mpls_output_inline(vm, node, from_frame, /* is_midchain */ 1)); -} - -VLIB_REGISTER_NODE (mpls_midchain_node) = { - .function = mpls_midchain, - .name = "mpls-midchain", - .vector_size = sizeof (u32), - - .format_trace = format_mpls_output_trace, - - .sibling_of = "mpls-output", -}; - -VLIB_NODE_FUNCTION_MULTIARCH (mpls_midchain_node, mpls_midchain) - -/** - * @brief Next index values from the MPLS incomplete adj node - */ -#define foreach_mpls_adj_incomplete_next \ -_(DROP, "error-drop") \ -_(IP4, "ip4-arp") \ -_(IP6, "ip6-discover-neighbor") - -typedef enum { -#define _(s,n) MPLS_ADJ_INCOMPLETE_NEXT_##s, - foreach_mpls_adj_incomplete_next -#undef _ - MPLS_ADJ_INCOMPLETE_N_NEXT, -} mpls_adj_incomplete_next_t; - -/** - * @brief A struct to hold tracing information for the MPLS label imposition - * node. - */ -typedef struct mpls_adj_incomplete_trace_t_ -{ - u32 next; -} mpls_adj_incomplete_trace_t; - - -/** - * @brief Graph node for incomplete MPLS adjacency. - * This node will push traffic to either the v4-arp or v6-nd node - * based on the next-hop proto of the adj. - * We pay a cost for this 'routing' node, but an incomplete adj is the - * exception case. - */ -static inline uword -mpls_adj_incomplete (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - u32 n_left_from, next_index, * from, * to_next; - - 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 > 0 && n_left_to_next > 0) - { - u32 pi0, next0, adj_index0; - ip_adjacency_t * adj0; - vlib_buffer_t * p0; - - pi0 = to_next[0] = from[0]; - p0 = vlib_get_buffer (vm, pi0); - from += 1; - n_left_from -= 1; - to_next += 1; - n_left_to_next -= 1; - - adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX]; - ASSERT(adj_index0); - - adj0 = adj_get(adj_index0); - - if (PREDICT_TRUE(FIB_PROTOCOL_IP4 == adj0->ia_nh_proto)) - { - next0 = MPLS_ADJ_INCOMPLETE_NEXT_IP4; - } - else - { - next0 = MPLS_ADJ_INCOMPLETE_NEXT_IP6; - } - - if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED)) - { - mpls_adj_incomplete_trace_t *tr = - vlib_add_trace (vm, node, p0, sizeof (*tr)); - tr->next = 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 from_frame->n_vectors; -} - -static u8 * -format_mpls_adj_incomplete_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 *); - mpls_adj_incomplete_trace_t * t; - uword indent; - - t = va_arg (*args, mpls_adj_incomplete_trace_t *); - indent = format_get_indent (s); - - s = format (s, "%Unext:%d", - format_white_space, indent, - t->next); - return (s); -} - -VLIB_REGISTER_NODE (mpls_adj_incomplete_node) = { - .function = mpls_adj_incomplete, - .name = "mpls-adj-incomplete", - .format_trace = format_mpls_adj_incomplete_trace, - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - .n_errors = MPLS_N_ERROR, - .error_strings = mpls_error_strings, - - .n_next_nodes = MPLS_ADJ_INCOMPLETE_N_NEXT, - .next_nodes = { -#define _(s,n) [MPLS_ADJ_INCOMPLETE_NEXT_##s] = n, - foreach_mpls_adj_incomplete_next -#undef _ - }, -}; - -VLIB_NODE_FUNCTION_MULTIARCH (mpls_adj_incomplete_node, - mpls_adj_incomplete) |