/* * Copyright (c) 2017 SUSE LLC. * 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/geneve/geneve.h> /* Statistics (not all errors) */ #define foreach_geneve_encap_error \ _(ENCAPSULATED, "good packets encapsulated") static char *geneve_encap_error_strings[] = { #define _(sym,string) string, foreach_geneve_encap_error #undef _ }; typedef enum { #define _(sym,str) GENEVE_ENCAP_ERROR_##sym, foreach_geneve_encap_error #undef _ GENEVE_ENCAP_N_ERROR, } geneve_encap_error_t; typedef enum { GENEVE_ENCAP_NEXT_DROP, GENEVE_ENCAP_N_NEXT, } geneve_encap_next_t; #define foreach_fixed_header4_offset \ _(0) _(1) _(2) _(3) #define foreach_fixed_header6_offset \ _(0) _(1) _(2) _(3) _(4) _(5) _(6) always_inline uword geneve_encap_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame, u32 is_ip4) { u32 n_left_from, next_index, *from, *to_next; geneve_main_t *vxm = &geneve_main; vnet_main_t *vnm = vxm->vnet_main; vnet_interface_main_t *im = &vnm->interface_main; u32 pkts_encapsulated = 0; u16 old_l0 = 0, old_l1 = 0; u32 thread_index = vm->thread_index; u32 stats_sw_if_index, stats_n_packets, stats_n_bytes; u32 sw_if_index0 = ~0, sw_if_index1 = ~0; u32 next0 = 0, next1 = 0; vnet_hw_interface_t *hi0, *hi1; geneve_tunnel_t *t0 = NULL, *t1 = NULL; vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; from = vlib_frame_vector_args (from_frame); n_left_from = from_frame->n_vectors; vlib_get_buffers (vm, from, bufs, n_left_from); 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; u32 flow_hash0, flow_hash1; u32 len0, len1; ip4_header_t *ip4_0, *ip4_1; ip6_header_t *ip6_0, *ip6_1; udp_header_t *udp0, *udp1; u64 *copy_src0, *copy_dst0; u64 *copy_src1, *copy_dst1; u32 *copy_src_last0, *copy_dst_last0; u32 *copy_src_last1, *copy_dst_last1; u16 new_l0, new_l1; ip_csum_t sum0, sum1; /* Prefetch next iteration. */ { vlib_prefetch_buffer_header (b[2], LOAD); vlib_prefetch_buffer_header (b[3], LOAD); CLIB_PREFETCH (b[2]->data - CLIB_CACHE_LINE_BYTES, 2 * CLIB_CACHE_LINE_BYTES, LOAD); CLIB_PREFETCH (b[3]->data - CLIB_CACHE_LINE_BYTES, 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; flow_hash0 = vnet_l2_compute_flow_hash (b[0]); flow_hash1 = vnet_l2_compute_flow_hash (b[1]); /* Get next node index and adj index from tunnel next_dpo */ if (sw_if_index0 != vnet_buffer (b[0])->sw_if_index[VLIB_TX]) { sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX]; hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0); t0 = &vxm->tunnels[hi0->dev_instance]; /* Note: change to always set next0 if it may be set to drop */ next0 = t0->next_dpo.dpoi_next_node; } ASSERT (t0 != NULL); vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = t0->next_dpo.dpoi_index; /* Get next node index and adj index from tunnel next_dpo */ if (sw_if_index1 != vnet_buffer (b[1])->sw_if_index[VLIB_TX]) { sw_if_index1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX]; hi1 = vnet_get_sup_hw_interface (vnm, sw_if_index1); t1 = &vxm->tunnels[hi1->dev_instance]; /* Note: change to always set next1 if it may be set to drop */ next1 = t1->next_dpo.dpoi_next_node; } ASSERT (t1 != NULL); vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = t1->next_dpo.dpoi_index; /* Apply the rewrite string. $$$$ vnet_rewrite? */ vlib_buffer_advance (b[0], -(word) _vec_len (t0->rewrite)); vlib_buffer_advance (b[1], -(word) _vec_len (t1->rewrite)); if (is_ip4) { u8 ip4_geneve_base_header_len = sizeof (ip4_header_t) + sizeof (udp_header_t) + GENEVE_BASE_HEADER_LENGTH; u8 ip4_geneve_header_total_len0 = ip4_geneve_base_header_len; u8 ip4_geneve_header_total_len1 = ip4_geneve_base_header_len; #if SUPPORT_OPTIONS_HEADER==1 ip4_geneve_header_total_len0 += t0->options_len; ip4_geneve_header_total_len1 += t1->options_len; #endif ASSERT (vec_len (t0->rewrite) == ip4_geneve_header_total_len0); ASSERT (vec_len (t1->rewrite) == ip4_geneve_header_total_len1); ip4_0 = vlib_buffer_get_current (b[0]); ip4_1 = vlib_buffer_get_current (b[1]); /* Copy the fixed header */ copy_dst0 = (u64 *) ip4_0; copy_src0 = (u64 *) t0->rewrite; copy_dst1 = (u64 *) ip4_1; copy_src1 = (u64 *) t1->rewrite; /* Copy first 32 octets 8-bytes at a time */ #define _(offs) copy_dst0[offs] = copy_src0[offs]; foreach_fixed_header4_offset; #undef _ #define _(offs) copy_dst1[offs] = copy_src1[offs]; foreach_fixed_header4_offset; #undef _ /* Last 4 octets. Hopefully gcc will be our friend */ copy_dst_last0 = (u32 *) (©_dst0[4]); copy_src_last0 = (u32 *) (©_src0[4]); copy_dst_last0[0] = copy_src_last0[0]; copy_dst_last1 = (u32 *) (©_dst1[4]); copy_src_last1 = (u32 *) (©_src1[4]); copy_dst_last1[0] = copy_src_last1[0]; /* Fix the IP4 checksum and length */ sum0 = ip4_0->checksum; new_l0 = /* old_l0 always 0, see the rewrite setup */ clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b[0])); sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t, length /* changed member */ ); ip4_0->checksum = ip_csum_fold (sum0); ip4_0->length = new_l0; sum1 = ip4_1->checksum; new_l1 = /* old_l1 always 0, see the rewrite setup */ clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b[1])); sum1 = ip_csum_update (sum1, old_l1, new_l1, ip4_header_t, length /* changed member */ ); ip4_1->checksum = ip_csum_fold (sum1); ip4_1->length = new_l1; /* Fix UDP length and set source port */ udp0 = (udp_header_t *) (ip4_0 + 1); new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b[0]) - sizeof (*ip4_0)); udp0->length = new_l0; udp0->src_port = flow_hash0; udp1 = (udp_header_t *) (ip4_1 + 1); new_l1 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b[1]) - sizeof (*ip4_1)); udp1->length = new_l1; udp1->src_port = flow_hash1; } else /* ipv6 */ { int bogus = 0; u8 ip6_geneve_base_header_len = sizeof (ip6_header_t) + sizeof (udp_header_t) + GENEVE_BASE_HEADER_LENGTH; u8 ip6_geneve_header_total_len0 = ip6_geneve_base_header_len; u8 ip6_geneve_header_total_len1 = ip6_geneve_base_header_len; #if SUPPORT_OPTIONS_HEADER==1 ip6_geneve_header_total_len0 += t0->options_len; ip6_geneve_header_total_len1 += t1->options_len; #endif ASSERT (vec_len (t0->rewrite) == ip6_geneve_header_total_len0); ASSERT (vec_len (t1->rewrite) == ip6_geneve_header_total_len1); ip6_0 = vlib_buffer_get_current (b[0]); ip6_1 = vlib_buffer_get_current (b[1]); /* Copy the fixed header */ copy_dst0 = (u64 *) ip6_0; copy_src0 = (u64 *) t0->rewrite; copy_dst1 = (u64 *) ip6_1; copy_src1 = (u64 *) t1->rewrite; /* Copy first 56 (ip6) octets 8-bytes at a time */ #define _(offs) copy_dst0[offs] = copy_src0[offs]; foreach_fixed_header6_offset; #undef _ #define _(offs) copy_dst1[offs] = copy_src1[offs]; foreach_fixed_header6_offset; #undef _ /* Fix IP6 payload length */ new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b[0]) - sizeof (*ip6_0)); ip6_0->payload_length = new_l0; new_l1 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b[1]) - sizeof (*ip6_1)); ip6_1->payload_length = new_l1; /* Fix UDP length and set source port */ udp0 = (udp_header_t *) (ip6_0 + 1); udp0->length = new_l0; udp0->src_port = flow_hash0; udp1 = (udp_header_t *) (ip6_1 + 1); udp1->length = new_l1; udp1->src_port = flow_hash1; /* IPv6 UDP checksum is mandatory */ udp0->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b[0], ip6_0, &bogus); ASSERT (bogus == 0); if (udp0->checksum == 0) udp0->checksum = 0xffff; udp1->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b[1], ip6_1, &bogus); ASSERT (bogus == 0); if (udp1->checksum == 0) udp1->checksum = 0xffff; } pkts_encapsulated += 2; len0 = vlib_buffer_length_in_chain (vm, b[0]); len1 = vlib_buffer_length_in_chain (vm, b[1]); stats_n_packets += 2; stats_n_bytes += len0 + len1; /* Batch stats increment on the same geneve 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, thread_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, thread_index, sw_if_index0, 1, len0); vlib_increment_combined_counter (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX, thread_index, sw_if_index1, 1, len1); } } if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED)) { geneve_encap_trace_t *tr = vlib_add_trace (vm, node, b[0], sizeof (*tr)); tr->tunnel_index = t0 - vxm->tunnels; tr->vni = t0->vni; } if (PREDICT_FALSE (b[1]->flags & VLIB_BUFFER_IS_TRACED)) { geneve_encap_trace_t *tr = vlib_add_trace (vm, node, b[1], sizeof (*tr)); tr->tunnel_index = t1 - vxm->tunnels; tr->vni = t1->vni; } b += 2; 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; u32 flow_hash0; u32 len0; ip4_header_t *ip4_0; ip6_header_t *ip6_0; udp_header_t *udp0; u64 *copy_src0, *copy_dst0; u32 *copy_src_last0, *copy_dst_last0; 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; flow_hash0 = vnet_l2_compute_flow_hash (b[0]); /* Get next node index and adj index from tunnel next_dpo */ if (sw_if_index0 != vnet_buffer (b[0])->sw_if_index[VLIB_TX]) { sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX]; hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0); t0 = &vxm->tunnels[hi0->dev_instance]; /* Note: change to always set next0 if it may be set to drop */ next0 = t0->next_dpo.dpoi_next_node; } vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = t0->next_dpo.dpoi_index; /* Apply the rewrite string. $$$$ vnet_rewrite? */ vlib_buffer_advance (b[0], -(word) _vec_len (t0->rewrite)); if (is_ip4) { u8 ip4_geneve_base_header_len = sizeof (ip4_header_t) + sizeof (udp_header_t) + GENEVE_BASE_HEADER_LENGTH; u8 ip4_geneve_header_total_len0 = ip4_geneve_base_header_len; #if SUPPORT_OPTIONS_HEADER==1 ip4_geneve_header_total_len0 += t0->options_len; #endif ASSERT (vec_len (t0->rewrite) == ip4_geneve_header_total_len0); ip4_0 = vlib_buffer_get_current (b[0]); /* Copy the fixed header */ copy_dst0 = (u64 *) ip4_0; copy_src0 = (u64 *) t0->rewrite; /* Copy first 32 octets 8-bytes at a time */ #define _(offs) copy_dst0[offs] = copy_src0[offs]; foreach_fixed_header4_offset; #undef _ /* Last 4 octets. Hopefully gcc will be our friend */ copy_dst_last0 = (u32 *) (©_dst0[4]); copy_src_last0 = (u32 *) (©_src0[4]); copy_dst_last0[0] = copy_src_last0[0]; /* Fix the IP4 checksum and length */ sum0 = ip4_0->checksum; new_l0 = /* old_l0 always 0, see the rewrite setup */ clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b[0])); sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t, length /* changed member */ ); ip4_0->checksum = ip_csum_fold (sum0); ip4_0->length = new_l0; /* Fix UDP length and set source port */ udp0 = (udp_header_t *) (ip4_0 + 1); new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b[0]) - sizeof (*ip4_0)); udp0->length = new_l0; udp0->src_port = flow_hash0; } else /* ip6 path */ { int bogus = 0; u8 ip6_geneve_base_header_len = sizeof (ip6_header_t) + sizeof (udp_header_t) + GENEVE_BASE_HEADER_LENGTH; u8 ip6_geneve_header_total_len0 = ip6_geneve_base_header_len; #if SUPPORT_OPTIONS_HEADER==1 ip6_geneve_header_total_len0 += t0->options_len; #endif ASSERT (vec_len (t0->rewrite) == ip6_geneve_header_total_len0); ip6_0 = vlib_buffer_get_current (b[0]); /* Copy the fixed header */ copy_dst0 = (u64 *) ip6_0; copy_src0 = (u64 *) t0->rewrite; /* Copy first 56 (ip6) octets 8-bytes at a time */ #define _(offs) copy_dst0[offs] = copy_src0[offs]; foreach_fixed_header6_offset; #undef _ /* Fix IP6 payload length */ new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b[0]) - sizeof (*ip6_0)); ip6_0->payload_length = new_l0; /* Fix UDP length and set source port */ udp0 = (udp_header_t *) (ip6_0 + 1); udp0->length = new_l0; udp0->src_port = flow_hash0; /* IPv6 UDP checksum is mandatory */ udp0->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b[0], ip6_0, &bogus); ASSERT (bogus == 0); if (udp0->checksum == 0) udp0->checksum = 0xffff; } pkts_encapsulated++; len0 = vlib_buffer_length_in_chain (vm, b[0]); stats_n_packets += 1; stats_n_bytes += len0; /* Batch stats increment on the same geneve 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, thread_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 (b[0]->flags & VLIB_BUFFER_IS_TRACED)) { geneve_encap_trace_t *tr = vlib_add_trace (vm, node, b[0], sizeof (*tr)); tr->tunnel_index = t0 - vxm->tunnels; tr->vni = t0->vni; } b += 1; 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); } /* Do we still need this now that tunnel tx stats is kept? */ vlib_node_increment_counter (vm, node->node_index, GENEVE_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, thread_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_NODE_FN (geneve4_encap_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { return geneve_encap_inline (vm, node, from_frame, /* is_ip4 */ 1); } VLIB_NODE_FN (geneve6_encap_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { return geneve_encap_inline (vm, node, from_frame, /* is_ip4 */ 0); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (geneve4_encap_node) = { .name = "geneve4-encap", .vector_size = sizeof (u32), .format_trace = format_geneve_encap_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (geneve_encap_error_strings), .error_strings = geneve_encap_error_strings, .n_next_nodes = GENEVE_ENCAP_N_NEXT, .next_nodes = { [GENEVE_ENCAP_NEXT_DROP] = "error-drop", }, }; VLIB_REGISTER_NODE (geneve6_encap_node) = { .name = "geneve6-encap", .vector_size = sizeof (u32), .format_trace = format_geneve_encap_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (geneve_encap_error_strings), .error_strings = geneve_encap_error_strings, .n_next_nodes = GENEVE_ENCAP_N_NEXT, .next_nodes = { [GENEVE_ENCAP_NEXT_DROP] = "error-drop", }, }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */