diff options
Diffstat (limited to 'vnet/vnet/nsh-gre/encap.c')
| -rw-r--r-- | vnet/vnet/nsh-gre/encap.c | 376 |
1 files changed, 0 insertions, 376 deletions
diff --git a/vnet/vnet/nsh-gre/encap.c b/vnet/vnet/nsh-gre/encap.c deleted file mode 100644 index 78b02178263..00000000000 --- a/vnet/vnet/nsh-gre/encap.c +++ /dev/null @@ -1,376 +0,0 @@ -/* - * 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. - */ -#include <vppinfra/error.h> -#include <vppinfra/hash.h> -#include <vnet/vnet.h> -#include <vnet/ip/ip.h> -#include <vnet/ethernet/ethernet.h> -#include <vnet/nsh-gre/nsh_gre.h> - -/* Statistics (not really errors) */ -#define foreach_nsh_gre_encap_error \ -_(ENCAPSULATED, "good packets encapsulated") - -static char * nsh_gre_encap_error_strings[] = { -#define _(sym,string) string, - foreach_nsh_gre_encap_error -#undef _ -}; - -typedef enum { -#define _(sym,str) NSH_GRE_ENCAP_ERROR_##sym, - foreach_nsh_gre_encap_error -#undef _ - NSH_GRE_ENCAP_N_ERROR, -} nsh_gre_encap_error_t; - -typedef enum { - NSH_GRE_ENCAP_NEXT_IP4_LOOKUP, - NSH_GRE_ENCAP_NEXT_DROP, - NSH_GRE_ENCAP_N_NEXT, -} nsh_gre_encap_next_t; - -typedef struct { - u32 tunnel_index; -} nsh_gre_encap_trace_t; - -u8 * format_nsh_gre_encap_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 *); - nsh_gre_encap_trace_t * t = va_arg (*args, nsh_gre_encap_trace_t *); - - s = format (s, "NSH-GRE-ENCAP: tunnel %d", t->tunnel_index); - return s; -} - -static uword -nsh_gre_encap (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - u32 n_left_from, next_index, * from, * to_next; - nsh_gre_main_t * ngm = &nsh_gre_main; - vnet_main_t * vnm = ngm->vnet_main; - vnet_interface_main_t * im = &vnm->interface_main; - u32 pkts_encapsulated = 0; - u16 old_l0 = 0, old_l1 = 0; - u32 cpu_index = os_get_cpu_number(); - u32 stats_sw_if_index, stats_n_packets, stats_n_bytes; - - from = vlib_frame_vector_args (from_frame); - n_left_from = from_frame->n_vectors; - - next_index = node->cached_next_index; - stats_sw_if_index = node->runtime_data[0]; - stats_n_packets = stats_n_bytes = 0; - - 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_GRE_ENCAP_NEXT_IP4_LOOKUP; - u32 next1 = NSH_GRE_ENCAP_NEXT_IP4_LOOKUP; - u32 sw_if_index0, sw_if_index1, len0, len1; - vnet_hw_interface_t * hi0, * hi1; - ip4_header_t * ip0, * ip1; - u64 * copy_src0, * copy_dst0; - u64 * copy_src1, * copy_dst1; - nsh_gre_tunnel_t * t0, * t1; - u16 new_l0, new_l1; - ip_csum_t sum0, sum1; - - /* 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_to_next -= 2; - n_left_from -= 2; - - b0 = vlib_get_buffer (vm, bi0); - b1 = vlib_get_buffer (vm, bi1); - - /* 1-wide cache? */ - sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX]; - sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_TX]; - hi0 = vnet_get_sup_hw_interface - (vnm, vnet_buffer(b0)->sw_if_index[VLIB_TX]); - hi1 = vnet_get_sup_hw_interface - (vnm, vnet_buffer(b1)->sw_if_index[VLIB_TX]); - - t0 = pool_elt_at_index (ngm->tunnels, hi0->dev_instance); - t1 = pool_elt_at_index (ngm->tunnels, hi1->dev_instance); - - ASSERT(vec_len(t0->rewrite) >= 24); - ASSERT(vec_len(t1->rewrite) >= 24); - - /* Apply the rewrite string. $$$$ vnet_rewrite? */ - vlib_buffer_advance (b0, -(word)_vec_len(t0->rewrite)); - vlib_buffer_advance (b1, -(word)_vec_len(t1->rewrite)); - - ip0 = vlib_buffer_get_current(b0); - ip1 = vlib_buffer_get_current(b1); - /* Copy the fixed header */ - copy_dst0 = (u64 *) ip0; - copy_src0 = (u64 *) t0->rewrite; - copy_dst1 = (u64 *) ip1; - copy_src1 = (u64 *) t1->rewrite; - - copy_dst0[0] = copy_src0[0]; - copy_dst0[1] = copy_src0[1]; - copy_dst0[2] = copy_src0[2]; - - copy_dst1[0] = copy_src1[0]; - copy_dst1[1] = copy_src1[1]; - copy_dst1[2] = copy_src1[2]; - - /* If there are TLVs to copy, do so */ - if (PREDICT_FALSE (_vec_len(t0->rewrite) > 24)) - clib_memcpy (©_dst0[3], t0->rewrite + 24 , - _vec_len (t0->rewrite)-24); - - if (PREDICT_FALSE (_vec_len(t1->rewrite) > 24)) - clib_memcpy (©_dst1[3], t1->rewrite + 24 , - _vec_len (t1->rewrite)-24); - - /* fix the <bleep>ing outer-IP checksums */ - sum0 = ip0->checksum; - /* old_l0 always 0, see the rewrite setup */ - new_l0 = - clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)); - - sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t, - length /* changed member */); - ip0->checksum = ip_csum_fold (sum0); - ip0->length = new_l0; - - sum1 = ip1->checksum; - /* old_l1 always 1, see the rewrite setup */ - new_l1 = - clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b1)); - - sum1 = ip_csum_update (sum1, old_l1, new_l1, ip4_header_t, - length /* changed member */); - ip1->checksum = ip_csum_fold (sum1); - ip1->length = new_l1; - - /* Reset to look up tunnel partner in the configured FIB */ - vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->encap_fib_index; - vnet_buffer(b1)->sw_if_index[VLIB_TX] = t1->encap_fib_index; - vnet_buffer(b0)->sw_if_index[VLIB_RX] = sw_if_index0; - vnet_buffer(b1)->sw_if_index[VLIB_RX] = sw_if_index1; - pkts_encapsulated += 2; - - len0 = vlib_buffer_length_in_chain(vm, b0); - len1 = vlib_buffer_length_in_chain(vm, b0); - stats_n_packets += 2; - stats_n_bytes += len0 + len1; - - /* Batch stats increment on the same vxlan tunnel so counter is not - incremented per packet. Note stats are still incremented for deleted - and admin-down tunnel where packets are dropped. It is not worthwhile - to check for this rare case and affect normal path performance. */ - if (PREDICT_FALSE( - (sw_if_index0 != stats_sw_if_index) - || (sw_if_index1 != stats_sw_if_index))) { - stats_n_packets -= 2; - stats_n_bytes -= len0 + len1; - if (sw_if_index0 == sw_if_index1) { - if (stats_n_packets) - vlib_increment_combined_counter( - im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX, - cpu_index, stats_sw_if_index, stats_n_packets, stats_n_bytes); - stats_sw_if_index = sw_if_index0; - stats_n_packets = 2; - stats_n_bytes = len0 + len1; - } else { - vlib_increment_combined_counter( - im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX, - cpu_index, sw_if_index0, 1, len0); - vlib_increment_combined_counter( - im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX, - cpu_index, sw_if_index1, 1, len1); - } - } - - if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) - { - nsh_gre_encap_trace_t *tr = - vlib_add_trace (vm, node, b0, sizeof (*tr)); - tr->tunnel_index = t0 - ngm->tunnels; - } - - if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED)) - { - nsh_gre_encap_trace_t *tr = - vlib_add_trace (vm, node, b1, sizeof (*tr)); - tr->tunnel_index = t1 - ngm->tunnels; - } - - 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 = NSH_GRE_ENCAP_NEXT_IP4_LOOKUP; - u32 sw_if_index0, len0; - vnet_hw_interface_t * hi0; - ip4_header_t * ip0; - u64 * copy_src0, * copy_dst0; - nsh_gre_tunnel_t * t0; - u16 new_l0; - ip_csum_t sum0; - - 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); - - /* 1-wide cache? */ - sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX]; - hi0 = vnet_get_sup_hw_interface - (vnm, vnet_buffer(b0)->sw_if_index[VLIB_TX]); - - t0 = pool_elt_at_index (ngm->tunnels, hi0->dev_instance); - - ASSERT(vec_len(t0->rewrite) >= 24); - - /* Apply the rewrite string. $$$$ vnet_rewrite? */ - vlib_buffer_advance (b0, -(word)_vec_len(t0->rewrite)); - - ip0 = vlib_buffer_get_current(b0); - /* Copy the fixed header */ - copy_dst0 = (u64 *) ip0; - copy_src0 = (u64 *) t0->rewrite; - copy_dst0[0] = copy_src0[0]; - copy_dst0[1] = copy_src0[1]; - copy_dst0[2] = copy_src0[2]; - - /* If there are TLVs to copy, do so */ - if (PREDICT_FALSE (_vec_len(t0->rewrite) > 24)) - clib_memcpy (©_dst0[3], t0->rewrite + 24 , - _vec_len (t0->rewrite)-24); - - /* fix the <bleep>ing outer-IP checksum */ - sum0 = ip0->checksum; - /* old_l0 always 0, see the rewrite setup */ - new_l0 = - clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)); - - sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t, - length /* changed member */); - ip0->checksum = ip_csum_fold (sum0); - ip0->length = new_l0; - - /* Reset to look up tunnel partner in the configured FIB */ - vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->encap_fib_index; - vnet_buffer(b0)->sw_if_index[VLIB_RX] = sw_if_index0; - pkts_encapsulated ++; - - len0 = vlib_buffer_length_in_chain(vm, b0); - stats_n_packets += 1; - stats_n_bytes += len0; - - /* Batch stats increment on the same vxlan tunnel so counter is not - incremented per packet. Note stats are still incremented for deleted - and admin-down tunnel where packets are dropped. It is not worthwhile - to check for this rare case and affect normal path performance. */ - if (PREDICT_FALSE(sw_if_index0 != stats_sw_if_index)) { - stats_n_packets -= 1; - stats_n_bytes -= len0; - if (stats_n_packets) - vlib_increment_combined_counter( - im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX, - cpu_index, stats_sw_if_index, stats_n_packets, stats_n_bytes); - stats_n_packets = 1; - stats_n_bytes = len0; - stats_sw_if_index = sw_if_index0; - } - if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) - { - nsh_gre_encap_trace_t *tr = - vlib_add_trace (vm, node, b0, sizeof (*tr)); - tr->tunnel_index = t0 - ngm->tunnels; - } - 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, node->node_index, - NSH_GRE_ENCAP_ERROR_ENCAPSULATED, - pkts_encapsulated); - /* Increment any remaining batch stats */ - if (stats_n_packets) { - vlib_increment_combined_counter( - im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX, cpu_index, - stats_sw_if_index, stats_n_packets, stats_n_bytes); - node->runtime_data[0] = stats_sw_if_index; - } - - return from_frame->n_vectors; -} - -VLIB_REGISTER_NODE (nsh_gre_encap_node) = { - .function = nsh_gre_encap, - .name = "nsh-gre-encap", - .vector_size = sizeof (u32), - .format_trace = format_nsh_gre_encap_trace, - .type = VLIB_NODE_TYPE_INTERNAL, - - .n_errors = ARRAY_LEN(nsh_gre_encap_error_strings), - .error_strings = nsh_gre_encap_error_strings, - - .n_next_nodes = NSH_GRE_ENCAP_N_NEXT, - - // add dispositions here - .next_nodes = { - [NSH_GRE_ENCAP_NEXT_IP4_LOOKUP] = "ip4-lookup", - [NSH_GRE_ENCAP_NEXT_DROP] = "error-drop", - }, -}; |