diff options
Diffstat (limited to 'src/plugins/geneve/decap.c')
| -rw-r--r-- | src/plugins/geneve/decap.c | 1303 |
1 files changed, 1303 insertions, 0 deletions
diff --git a/src/plugins/geneve/decap.c b/src/plugins/geneve/decap.c new file mode 100644 index 00000000000..f42c0a88a5a --- /dev/null +++ b/src/plugins/geneve/decap.c @@ -0,0 +1,1303 @@ +/* + * 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 <vlib/vlib.h> + +#include <geneve/geneve.h> + +typedef struct +{ + u32 next_index; + u32 tunnel_index; + u32 error; + u32 vni_rsvd; +} geneve_rx_trace_t; + +static u8 * +format_geneve_rx_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 *); + geneve_rx_trace_t *t = va_arg (*args, geneve_rx_trace_t *); + + if (t->tunnel_index != ~0) + { + s = + format (s, + "GENEVE decap from geneve_tunnel%d vni %d next %d error %d", + t->tunnel_index, t->vni_rsvd, t->next_index, t->error); + } + else + { + s = format (s, "GENEVE decap error - tunnel for vni %d does not exist", + t->vni_rsvd); + } + return s; +} + +always_inline u32 +validate_geneve_fib (vlib_buffer_t * b, geneve_tunnel_t * t, u32 is_ip4) +{ + u32 fib_index, sw_if_index; + + sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX]; + + if (is_ip4) + fib_index = (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ? + vec_elt (ip4_main.fib_index_by_sw_if_index, sw_if_index) : + vnet_buffer (b)->sw_if_index[VLIB_TX]; + else + fib_index = (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ? + vec_elt (ip6_main.fib_index_by_sw_if_index, sw_if_index) : + vnet_buffer (b)->sw_if_index[VLIB_TX]; + + return (fib_index == t->encap_fib_index); +} + +always_inline uword +geneve_input (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 last_tunnel_index = ~0; + geneve4_tunnel_key_t last_key4; + geneve6_tunnel_key_t last_key6; + u32 pkts_decapsulated = 0; + u32 thread_index = vm->thread_index; + u32 stats_sw_if_index, stats_n_packets, stats_n_bytes; + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; + + if (is_ip4) + last_key4.as_u64 = ~0; + else + clib_memset (&last_key6, 0xff, sizeof (last_key6)); + + 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; + vlib_buffer_t *b0, *b1; + u32 next0, next1; + ip4_header_t *ip4_0, *ip4_1; + ip6_header_t *ip6_0, *ip6_1; + geneve_header_t *geneve0, *geneve1; + uword *p0, *p1; + u32 tunnel_index0, tunnel_index1; + geneve_tunnel_t *t0, *t1, *mt0 = NULL, *mt1 = NULL; + geneve4_tunnel_key_t key4_0, key4_1; + geneve6_tunnel_key_t key6_0, key6_1; + u32 error0, error1; + u32 sw_if_index0, sw_if_index1, len0, len1; + + /* Prefetch next iteration. */ + { + vlib_prefetch_buffer_header (b[2], LOAD); + vlib_prefetch_buffer_header (b[3], LOAD); + + CLIB_PREFETCH (b[2]->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (b[3]->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 = b[0]; + b1 = b[1]; + b += 2; + + /* udp leaves current_data pointing at the geneve header */ + geneve0 = vlib_buffer_get_current (b0); + geneve1 = vlib_buffer_get_current (b1); + + vnet_geneve_hdr_1word_ntoh (geneve0); + vnet_geneve_hdr_1word_ntoh (geneve1); + + if (is_ip4) + { + vlib_buffer_advance + (b0, -(word) (sizeof (udp_header_t) + sizeof (ip4_header_t))); + vlib_buffer_advance + (b1, -(word) (sizeof (udp_header_t) + sizeof (ip4_header_t))); + ip4_0 = vlib_buffer_get_current (b0); + ip4_1 = vlib_buffer_get_current (b1); + } + else + { + vlib_buffer_advance + (b0, -(word) (sizeof (udp_header_t) + sizeof (ip6_header_t))); + vlib_buffer_advance + (b1, -(word) (sizeof (udp_header_t) + sizeof (ip6_header_t))); + ip6_0 = vlib_buffer_get_current (b0); + ip6_1 = vlib_buffer_get_current (b1); + } + + /* pop (ip, udp, geneve) */ + if (is_ip4) + { + vlib_buffer_advance (b0, + sizeof (*ip4_0) + sizeof (udp_header_t) + + GENEVE_BASE_HEADER_LENGTH + + vnet_get_geneve_options_len (geneve0)); + vlib_buffer_advance (b1, + sizeof (*ip4_1) + sizeof (udp_header_t) + + GENEVE_BASE_HEADER_LENGTH + + vnet_get_geneve_options_len (geneve1)); + } + else + { + vlib_buffer_advance (b0, + sizeof (*ip6_0) + sizeof (udp_header_t) + + GENEVE_BASE_HEADER_LENGTH + + vnet_get_geneve_options_len (geneve0)); + vlib_buffer_advance (b1, + sizeof (*ip6_1) + sizeof (udp_header_t) + + GENEVE_BASE_HEADER_LENGTH + + vnet_get_geneve_options_len (geneve1)); + } + + tunnel_index0 = ~0; + error0 = 0; + + tunnel_index1 = ~0; + error1 = 0; + + if (PREDICT_FALSE + (vnet_get_geneve_version (geneve0) != GENEVE_VERSION)) + { + error0 = GENEVE_ERROR_BAD_FLAGS; + next0 = GENEVE_INPUT_NEXT_DROP; + goto trace0; + } +#if SUPPORT_OPTIONS_HEADER==1 + if (PREDICT_FALSE (vnet_get_geneve_critical_bit (geneve0) == 1)) + { + error0 = GENEVE_ERROR_BAD_FLAGS; + next0 = GENEVE_INPUT_NEXT_DROP; + goto trace0; + } +#endif + if (is_ip4) + { + key4_0.remote = ip4_0->src_address.as_u32; + key4_0.vni = vnet_get_geneve_vni_network_order (geneve0); + + /* Make sure GENEVE tunnel exist according to packet SIP and VNI */ + if (PREDICT_FALSE (key4_0.as_u64 != last_key4.as_u64)) + { + p0 = hash_get (vxm->geneve4_tunnel_by_key, key4_0.as_u64); + if (PREDICT_FALSE (p0 == NULL)) + { + error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next0 = GENEVE_INPUT_NEXT_DROP; + goto trace0; + } + last_key4.as_u64 = key4_0.as_u64; + tunnel_index0 = last_tunnel_index = p0[0]; + } + else + tunnel_index0 = last_tunnel_index; + t0 = pool_elt_at_index (vxm->tunnels, tunnel_index0); + + /* Validate GENEVE tunnel encap-fib index against packet */ + if (PREDICT_FALSE (validate_geneve_fib (b0, t0, is_ip4) == 0)) + { + error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next0 = GENEVE_INPUT_NEXT_DROP; + goto trace0; + } + + /* Validate GENEVE tunnel SIP against packet DIP */ + if (PREDICT_TRUE + (ip4_0->dst_address.as_u32 == t0->local.ip4.as_u32)) + goto next0; /* valid packet */ + if (PREDICT_FALSE + (ip4_address_is_multicast (&ip4_0->dst_address))) + { + key4_0.remote = ip4_0->dst_address.as_u32; + key4_0.vni = vnet_get_geneve_vni_network_order (geneve0); + /* Make sure mcast GENEVE tunnel exist by packet DIP and VNI */ + p0 = hash_get (vxm->geneve4_tunnel_by_key, key4_0.as_u64); + if (PREDICT_TRUE (p0 != NULL)) + { + mt0 = pool_elt_at_index (vxm->tunnels, p0[0]); + goto next0; /* valid packet */ + } + } + error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next0 = GENEVE_INPUT_NEXT_DROP; + goto trace0; + + } + else /* !is_ip4 */ + { + key6_0.remote.as_u64[0] = ip6_0->src_address.as_u64[0]; + key6_0.remote.as_u64[1] = ip6_0->src_address.as_u64[1]; + key6_0.vni = vnet_get_geneve_vni_network_order (geneve0); + + /* Make sure GENEVE tunnel exist according to packet SIP and VNI */ + if (PREDICT_FALSE + (memcmp (&key6_0, &last_key6, sizeof (last_key6)) != 0)) + { + p0 = hash_get_mem (vxm->geneve6_tunnel_by_key, &key6_0); + if (PREDICT_FALSE (p0 == NULL)) + { + error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next0 = GENEVE_INPUT_NEXT_DROP; + goto trace0; + } + clib_memcpy_fast (&last_key6, &key6_0, sizeof (key6_0)); + tunnel_index0 = last_tunnel_index = p0[0]; + } + else + tunnel_index0 = last_tunnel_index; + t0 = pool_elt_at_index (vxm->tunnels, tunnel_index0); + + /* Validate GENEVE tunnel encap-fib index against packet */ + if (PREDICT_FALSE (validate_geneve_fib (b0, t0, is_ip4) == 0)) + { + error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next0 = GENEVE_INPUT_NEXT_DROP; + goto trace0; + } + + /* Validate GENEVE tunnel SIP against packet DIP */ + if (PREDICT_TRUE (ip6_address_is_equal (&ip6_0->dst_address, + &t0->local.ip6))) + goto next0; /* valid packet */ + if (PREDICT_FALSE + (ip6_address_is_multicast (&ip6_0->dst_address))) + { + key6_0.remote.as_u64[0] = ip6_0->dst_address.as_u64[0]; + key6_0.remote.as_u64[1] = ip6_0->dst_address.as_u64[1]; + key6_0.vni = vnet_get_geneve_vni_network_order (geneve0); + p0 = hash_get_mem (vxm->geneve6_tunnel_by_key, &key6_0); + if (PREDICT_TRUE (p0 != NULL)) + { + mt0 = pool_elt_at_index (vxm->tunnels, p0[0]); + goto next0; /* valid packet */ + } + } + error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next0 = GENEVE_INPUT_NEXT_DROP; + goto trace0; + } + + next0: + next0 = t0->decap_next_index; + sw_if_index0 = t0->sw_if_index; + len0 = vlib_buffer_length_in_chain (vm, b0); + + /* Required to make the l2 tag push / pop code work on l2 subifs */ + if (PREDICT_TRUE (next0 == GENEVE_INPUT_NEXT_L2_INPUT)) + vnet_update_l2_len (b0); + + /* Set packet input sw_if_index to unicast GENEVE tunnel for learning */ + vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index0; + sw_if_index0 = (mt0) ? mt0->sw_if_index : sw_if_index0; + + pkts_decapsulated++; + stats_n_packets += 1; + stats_n_bytes += len0; + + /* Batch stats increment on the same geneve tunnel so counter + is not incremented per packet */ + 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_RX, + 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; + } + + trace0: + b0->error = error0 ? node->errors[error0] : 0; + + if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) + { + geneve_rx_trace_t *tr + = vlib_add_trace (vm, node, b0, sizeof (*tr)); + tr->next_index = next0; + tr->error = error0; + tr->tunnel_index = tunnel_index0; + tr->vni_rsvd = vnet_get_geneve_vni (geneve0); + } + + if (PREDICT_FALSE + (vnet_get_geneve_version (geneve1) != GENEVE_VERSION)) + { + error1 = GENEVE_ERROR_BAD_FLAGS; + next1 = GENEVE_INPUT_NEXT_DROP; + goto trace1; + } +#if SUPPORT_OPTIONS_HEADER==1 + if (PREDICT_FALSE (vnet_get_geneve_critical_bit (geneve1) == 1)) + { + error1 = GENEVE_ERROR_BAD_FLAGS; + next1 = GENEVE_INPUT_NEXT_DROP; + goto trace1; + } +#endif + if (is_ip4) + { + key4_1.remote = ip4_1->src_address.as_u32; + key4_1.vni = vnet_get_geneve_vni_network_order (geneve1); + + /* Make sure unicast GENEVE tunnel exist by packet SIP and VNI */ + if (PREDICT_FALSE (key4_1.as_u64 != last_key4.as_u64)) + { + p1 = hash_get (vxm->geneve4_tunnel_by_key, key4_1.as_u64); + if (PREDICT_FALSE (p1 == NULL)) + { + error1 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next1 = GENEVE_INPUT_NEXT_DROP; + goto trace1; + } + last_key4.as_u64 = key4_1.as_u64; + tunnel_index1 = last_tunnel_index = p1[0]; + } + else + tunnel_index1 = last_tunnel_index; + t1 = pool_elt_at_index (vxm->tunnels, tunnel_index1); + + /* Validate GENEVE tunnel encap-fib index against packet */ + if (PREDICT_FALSE (validate_geneve_fib (b1, t1, is_ip4) == 0)) + { + error1 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next1 = GENEVE_INPUT_NEXT_DROP; + goto trace1; + } + + /* Validate GENEVE tunnel SIP against packet DIP */ + if (PREDICT_TRUE + (ip4_1->dst_address.as_u32 == t1->local.ip4.as_u32)) + goto next1; /* valid packet */ + if (PREDICT_FALSE + (ip4_address_is_multicast (&ip4_1->dst_address))) + { + key4_1.remote = ip4_1->dst_address.as_u32; + key4_1.vni = vnet_get_geneve_vni_network_order (geneve1); + /* Make sure mcast GENEVE tunnel exist by packet DIP and VNI */ + p1 = hash_get (vxm->geneve4_tunnel_by_key, key4_1.as_u64); + if (PREDICT_TRUE (p1 != NULL)) + { + mt1 = pool_elt_at_index (vxm->tunnels, p1[0]); + goto next1; /* valid packet */ + } + } + error1 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next1 = GENEVE_INPUT_NEXT_DROP; + goto trace1; + + } + else /* !is_ip4 */ + { + key6_1.remote.as_u64[0] = ip6_1->src_address.as_u64[0]; + key6_1.remote.as_u64[1] = ip6_1->src_address.as_u64[1]; + key6_1.vni = vnet_get_geneve_vni_network_order (geneve1); + + /* Make sure GENEVE tunnel exist according to packet SIP and VNI */ + if (PREDICT_FALSE + (memcmp (&key6_1, &last_key6, sizeof (last_key6)) != 0)) + { + p1 = hash_get_mem (vxm->geneve6_tunnel_by_key, &key6_1); + + if (PREDICT_FALSE (p1 == NULL)) + { + error1 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next1 = GENEVE_INPUT_NEXT_DROP; + goto trace1; + } + + clib_memcpy_fast (&last_key6, &key6_1, sizeof (key6_1)); + tunnel_index1 = last_tunnel_index = p1[0]; + } + else + tunnel_index1 = last_tunnel_index; + t1 = pool_elt_at_index (vxm->tunnels, tunnel_index1); + + /* Validate GENEVE tunnel encap-fib index against packet */ + if (PREDICT_FALSE (validate_geneve_fib (b1, t1, is_ip4) == 0)) + { + error1 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next1 = GENEVE_INPUT_NEXT_DROP; + goto trace1; + } + + /* Validate GENEVE tunnel SIP against packet DIP */ + if (PREDICT_TRUE (ip6_address_is_equal (&ip6_1->dst_address, + &t1->local.ip6))) + goto next1; /* valid packet */ + if (PREDICT_FALSE + (ip6_address_is_multicast (&ip6_1->dst_address))) + { + key6_1.remote.as_u64[0] = ip6_1->dst_address.as_u64[0]; + key6_1.remote.as_u64[1] = ip6_1->dst_address.as_u64[1]; + key6_1.vni = vnet_get_geneve_vni_network_order (geneve1); + p1 = hash_get_mem (vxm->geneve6_tunnel_by_key, &key6_1); + if (PREDICT_TRUE (p1 != NULL)) + { + mt1 = pool_elt_at_index (vxm->tunnels, p1[0]); + goto next1; /* valid packet */ + } + } + error1 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next1 = GENEVE_INPUT_NEXT_DROP; + goto trace1; + } + + next1: + next1 = t1->decap_next_index; + sw_if_index1 = t1->sw_if_index; + len1 = vlib_buffer_length_in_chain (vm, b1); + + /* Required to make the l2 tag push / pop code work on l2 subifs */ + if (PREDICT_TRUE (next1 == GENEVE_INPUT_NEXT_L2_INPUT)) + vnet_update_l2_len (b1); + + /* Set packet input sw_if_index to unicast GENEVE tunnel for learning */ + vnet_buffer (b1)->sw_if_index[VLIB_RX] = sw_if_index1; + sw_if_index1 = (mt1) ? mt1->sw_if_index : sw_if_index1; + + pkts_decapsulated++; + stats_n_packets += 1; + stats_n_bytes += len1; + + /* Batch stats increment on the same geneve tunnel so counter + is not incremented per packet */ + if (PREDICT_FALSE (sw_if_index1 != stats_sw_if_index)) + { + stats_n_packets -= 1; + stats_n_bytes -= len1; + if (stats_n_packets) + vlib_increment_combined_counter + (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX, + thread_index, stats_sw_if_index, + stats_n_packets, stats_n_bytes); + stats_n_packets = 1; + stats_n_bytes = len1; + stats_sw_if_index = sw_if_index1; + } + + trace1: + b1->error = error1 ? node->errors[error1] : 0; + + if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED)) + { + geneve_rx_trace_t *tr + = vlib_add_trace (vm, node, b1, sizeof (*tr)); + tr->next_index = next1; + tr->error = error1; + tr->tunnel_index = tunnel_index1; + tr->vni_rsvd = vnet_get_geneve_vni (geneve1); + } + + 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; + ip4_header_t *ip4_0; + ip6_header_t *ip6_0; + geneve_header_t *geneve0; + uword *p0; + u32 tunnel_index0; + geneve_tunnel_t *t0, *mt0 = NULL; + geneve4_tunnel_key_t key4_0; + geneve6_tunnel_key_t key6_0; + u32 error0; + u32 sw_if_index0, len0; + + bi0 = from[0]; + to_next[0] = bi0; + from += 1; + to_next += 1; + n_left_from -= 1; + n_left_to_next -= 1; + + b0 = b[0]; + b += 1; + + /* udp leaves current_data pointing at the geneve header */ + geneve0 = vlib_buffer_get_current (b0); + vnet_geneve_hdr_1word_ntoh (geneve0); + + if (is_ip4) + { + vlib_buffer_advance + (b0, -(word) (sizeof (udp_header_t) + sizeof (ip4_header_t))); + ip4_0 = vlib_buffer_get_current (b0); + } + else + { + vlib_buffer_advance + (b0, -(word) (sizeof (udp_header_t) + sizeof (ip6_header_t))); + ip6_0 = vlib_buffer_get_current (b0); + } + + /* pop (ip, udp, geneve) */ + if (is_ip4) + { + vlib_buffer_advance + (b0, + sizeof (*ip4_0) + sizeof (udp_header_t) + + GENEVE_BASE_HEADER_LENGTH + + vnet_get_geneve_options_len (geneve0)); + } + else + { + vlib_buffer_advance + (b0, + sizeof (*ip6_0) + sizeof (udp_header_t) + + GENEVE_BASE_HEADER_LENGTH + + vnet_get_geneve_options_len (geneve0)); + } + + tunnel_index0 = ~0; + error0 = 0; + + if (PREDICT_FALSE + (vnet_get_geneve_version (geneve0) != GENEVE_VERSION)) + { + error0 = GENEVE_ERROR_BAD_FLAGS; + next0 = GENEVE_INPUT_NEXT_DROP; + goto trace00; + } +#if SUPPORT_OPTIONS_HEADER==1 + if (PREDICT_FALSE (vnet_get_geneve_critical_bit (geneve0) == 1)) + { + error0 = GENEVE_ERROR_BAD_FLAGS; + next0 = GENEVE_INPUT_NEXT_DROP; + goto trace00; + } +#endif + if (is_ip4) + { + key4_0.remote = ip4_0->src_address.as_u32; + key4_0.vni = vnet_get_geneve_vni_network_order (geneve0); + + /* Make sure unicast GENEVE tunnel exist by packet SIP and VNI */ + if (PREDICT_FALSE (key4_0.as_u64 != last_key4.as_u64)) + { + p0 = hash_get (vxm->geneve4_tunnel_by_key, key4_0.as_u64); + if (PREDICT_FALSE (p0 == NULL)) + { + error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next0 = GENEVE_INPUT_NEXT_DROP; + goto trace00; + } + last_key4.as_u64 = key4_0.as_u64; + tunnel_index0 = last_tunnel_index = p0[0]; + } + else + tunnel_index0 = last_tunnel_index; + t0 = pool_elt_at_index (vxm->tunnels, tunnel_index0); + + /* Validate GENEVE tunnel encap-fib index agaist packet */ + if (PREDICT_FALSE (validate_geneve_fib (b0, t0, is_ip4) == 0)) + { + error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next0 = GENEVE_INPUT_NEXT_DROP; + goto trace00; + } + + /* Validate GENEVE tunnel SIP against packet DIP */ + if (PREDICT_TRUE + (ip4_0->dst_address.as_u32 == t0->local.ip4.as_u32)) + goto next00; /* valid packet */ + if (PREDICT_FALSE + (ip4_address_is_multicast (&ip4_0->dst_address))) + { + key4_0.remote = ip4_0->dst_address.as_u32; + key4_0.vni = vnet_get_geneve_vni_network_order (geneve0); + /* Make sure mcast GENEVE tunnel exist by packet DIP and VNI */ + p0 = hash_get (vxm->geneve4_tunnel_by_key, key4_0.as_u64); + if (PREDICT_TRUE (p0 != NULL)) + { + mt0 = pool_elt_at_index (vxm->tunnels, p0[0]); + goto next00; /* valid packet */ + } + } + error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next0 = GENEVE_INPUT_NEXT_DROP; + goto trace00; + + } + else /* !is_ip4 */ + { + key6_0.remote.as_u64[0] = ip6_0->src_address.as_u64[0]; + key6_0.remote.as_u64[1] = ip6_0->src_address.as_u64[1]; + key6_0.vni = vnet_get_geneve_vni_network_order (geneve0); + + /* Make sure GENEVE tunnel exist according to packet SIP and VNI */ + if (PREDICT_FALSE + (memcmp (&key6_0, &last_key6, sizeof (last_key6)) != 0)) + { + p0 = hash_get_mem (vxm->geneve6_tunnel_by_key, &key6_0); + if (PREDICT_FALSE (p0 == NULL)) + { + error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next0 = GENEVE_INPUT_NEXT_DROP; + goto trace00; + } + clib_memcpy_fast (&last_key6, &key6_0, sizeof (key6_0)); + tunnel_index0 = last_tunnel_index = p0[0]; + } + else + tunnel_index0 = last_tunnel_index; + t0 = pool_elt_at_index (vxm->tunnels, tunnel_index0); + + /* Validate GENEVE tunnel encap-fib index agaist packet */ + if (PREDICT_FALSE (validate_geneve_fib (b0, t0, is_ip4) == 0)) + { + error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next0 = GENEVE_INPUT_NEXT_DROP; + goto trace00; + } + + /* Validate GENEVE tunnel SIP against packet DIP */ + if (PREDICT_TRUE (ip6_address_is_equal (&ip6_0->dst_address, + &t0->local.ip6))) + goto next00; /* valid packet */ + if (PREDICT_FALSE + (ip6_address_is_multicast (&ip6_0->dst_address))) + { + key6_0.remote.as_u64[0] = ip6_0->dst_address.as_u64[0]; + key6_0.remote.as_u64[1] = ip6_0->dst_address.as_u64[1]; + key6_0.vni = vnet_get_geneve_vni_network_order (geneve0); + p0 = hash_get_mem (vxm->geneve6_tunnel_by_key, &key6_0); + if (PREDICT_TRUE (p0 != NULL)) + { + mt0 = pool_elt_at_index (vxm->tunnels, p0[0]); + goto next00; /* valid packet */ + } + } + error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; + next0 = GENEVE_INPUT_NEXT_DROP; + goto trace00; + } + + next00: + next0 = t0->decap_next_index; + sw_if_index0 = t0->sw_if_index; + len0 = vlib_buffer_length_in_chain (vm, b0); + + /* Required to make the l2 tag push / pop code work on l2 subifs */ + if (PREDICT_TRUE (next0 == GENEVE_INPUT_NEXT_L2_INPUT)) + vnet_update_l2_len (b0); + + /* Set packet input sw_if_index to unicast GENEVE tunnel for learning */ + vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index0; + sw_if_index0 = (mt0) ? mt0->sw_if_index : sw_if_index0; + + pkts_decapsulated++; + stats_n_packets += 1; + stats_n_bytes += len0; + + /* Batch stats increment on the same geneve tunnel so counter + is not incremented per packet */ + 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_RX, + 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; + } + + trace00: + b0->error = error0 ? node->errors[error0] : 0; + + if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) + { + geneve_rx_trace_t *tr + = vlib_add_trace (vm, node, b0, sizeof (*tr)); + tr->next_index = next0; + tr->error = error0; + tr->tunnel_index = tunnel_index0; + tr->vni_rsvd = vnet_get_geneve_vni (geneve0); + } + 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, is_ip4 ? + geneve4_input_node. + index : geneve6_input_node.index, + GENEVE_ERROR_DECAPSULATED, pkts_decapsulated); + + /* Increment any remaining batch stats */ + if (stats_n_packets) + { + vlib_increment_combined_counter + (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX, + 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_input_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + return geneve_input (vm, node, from_frame, /* is_ip4 */ 1); +} + +VLIB_NODE_FN (geneve6_input_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + return geneve_input (vm, node, from_frame, /* is_ip4 */ 0); +} + +static char *geneve_error_strings[] = { +#define geneve_error(n,s) s, +#include <geneve/geneve_error.def> +#undef geneve_error +#undef _ +}; + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (geneve4_input_node) = { + .name = "geneve4-input", + /* Takes a vector of packets. */ + .vector_size = sizeof (u32), + .n_errors = GENEVE_N_ERROR, + .error_strings = geneve_error_strings, + .n_next_nodes = GENEVE_INPUT_N_NEXT, + .next_nodes = { +#define _(s,n) [GENEVE_INPUT_NEXT_##s] = n, + foreach_geneve_input_next +#undef _ + }, + +//temp .format_buffer = format_geneve_header, + .format_trace = format_geneve_rx_trace, + // $$$$ .unformat_buffer = unformat_geneve_header, +}; + +VLIB_REGISTER_NODE (geneve6_input_node) = { + .name = "geneve6-input", + /* Takes a vector of packets. */ + .vector_size = sizeof (u32), + .n_errors = GENEVE_N_ERROR, + .error_strings = geneve_error_strings, + .n_next_nodes = GENEVE_INPUT_N_NEXT, + .next_nodes = { +#define _(s,n) [GENEVE_INPUT_NEXT_##s] = n, + foreach_geneve_input_next +#undef _ + }, +//temp .format_buffer = format_geneve_header, + .format_trace = format_geneve_rx_trace, + // $$$$ .unformat_buffer = unformat_geneve_header, +}; +/* *INDENT-ON* */ + +typedef enum +{ + IP_GENEVE_BYPASS_NEXT_DROP, + IP_GENEVE_BYPASS_NEXT_GENEVE, + IP_GENEVE_BYPASS_N_NEXT, +} ip_vxan_bypass_next_t; + +always_inline uword +ip_geneve_bypass_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, u32 is_ip4) +{ + geneve_main_t *vxm = &geneve_main; + u32 *from, *to_next, n_left_from, n_left_to_next, next_index; + vlib_node_runtime_t *error_node = + vlib_node_get_runtime (vm, ip4_input_node.index); + vtep4_key_t last_vtep4; /* last IPv4 address / fib index + matching a local VTEP address */ + vtep6_key_t last_vtep6; /* last IPv6 address / fib index + matching a local VTEP address */ + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; +#ifdef CLIB_HAVE_VEC512 + vtep4_cache_t vtep4_u512; + clib_memset (&vtep4_u512, 0, sizeof (vtep4_u512)); +#endif + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; + + vlib_get_buffers (vm, from, bufs, n_left_from); + + if (node->flags & VLIB_NODE_FLAG_TRACE) + ip4_forward_next_trace (vm, node, frame, VLIB_TX); + + if (is_ip4) + vtep4_key_init (&last_vtep4); + else + vtep6_key_init (&last_vtep6); + + 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) + { + vlib_buffer_t *b0, *b1; + ip4_header_t *ip40, *ip41; + ip6_header_t *ip60, *ip61; + udp_header_t *udp0, *udp1; + u32 bi0, ip_len0, udp_len0, flags0, next0; + u32 bi1, ip_len1, udp_len1, flags1, next1; + i32 len_diff0, len_diff1; + u8 error0, good_udp0, proto0; + u8 error1, good_udp1, proto1; + + /* Prefetch next iteration. */ + { + vlib_prefetch_buffer_header (b[2], LOAD); + vlib_prefetch_buffer_header (b[3], LOAD); + + CLIB_PREFETCH (b[2]->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (b[3]->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); + } + + bi0 = to_next[0] = from[0]; + bi1 = to_next[1] = from[1]; + from += 2; + n_left_from -= 2; + to_next += 2; + n_left_to_next -= 2; + + b0 = b[0]; + b1 = b[1]; + b += 2; + if (is_ip4) + { + ip40 = vlib_buffer_get_current (b0); + ip41 = vlib_buffer_get_current (b1); + } + else + { + ip60 = vlib_buffer_get_current (b0); + ip61 = vlib_buffer_get_current (b1); + } + + /* Setup packet for next IP feature */ + vnet_feature_next (&next0, b0); + vnet_feature_next (&next1, b1); + + if (is_ip4) + { + /* Treat IP frag packets as "experimental" protocol for now + until support of IP frag reassembly is implemented */ + proto0 = ip4_is_fragment (ip40) ? 0xfe : ip40->protocol; + proto1 = ip4_is_fragment (ip41) ? 0xfe : ip41->protocol; + } + else + { + proto0 = ip60->protocol; + proto1 = ip61->protocol; + } + + /* Process packet 0 */ + if (proto0 != IP_PROTOCOL_UDP) + goto exit0; /* not UDP packet */ + + if (is_ip4) + udp0 = ip4_next_header (ip40); + else + udp0 = ip6_next_header (ip60); + + if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_geneve)) + goto exit0; /* not GENEVE packet */ + + /* Validate DIP against VTEPs */ + if (is_ip4) + { +#ifdef CLIB_HAVE_VEC512 + if (!vtep4_check_vector + (&vxm->vtep_table, b0, ip40, &last_vtep4, &vtep4_u512)) +#else + if (!vtep4_check (&vxm->vtep_table, b0, ip40, &last_vtep4)) +#endif + goto exit0; /* no local VTEP for GENEVE packet */ + } + else + { + if (!vtep6_check (&vxm->vtep_table, b0, ip60, &last_vtep6)) + goto exit0; /* no local VTEP for GENEVE packet */ + } + + flags0 = b0->flags; + good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + good_udp0 |= udp0->checksum == 0; + + /* Verify UDP length */ + if (is_ip4) + ip_len0 = clib_net_to_host_u16 (ip40->length); + else + ip_len0 = clib_net_to_host_u16 (ip60->payload_length); + udp_len0 = clib_net_to_host_u16 (udp0->length); + len_diff0 = ip_len0 - udp_len0; + + /* Verify UDP checksum */ + if (PREDICT_FALSE (!good_udp0)) + { + if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0) + { + if (is_ip4) + flags0 = ip4_tcp_udp_validate_checksum (vm, b0); + else + flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0); + good_udp0 = + (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + } + } + + if (is_ip4) + { + error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM; + error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH; + } + else + { + error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM; + error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH; + } + + next0 = error0 ? + IP_GENEVE_BYPASS_NEXT_DROP : IP_GENEVE_BYPASS_NEXT_GENEVE; + b0->error = error0 ? error_node->errors[error0] : 0; + + /* geneve-input node expect current at GENEVE header */ + if (is_ip4) + vlib_buffer_advance (b0, + sizeof (ip4_header_t) + + sizeof (udp_header_t)); + else + vlib_buffer_advance (b0, + sizeof (ip6_header_t) + + sizeof (udp_header_t)); + + exit0: + /* Process packet 1 */ + if (proto1 != IP_PROTOCOL_UDP) + goto exit1; /* not UDP packet */ + + if (is_ip4) + udp1 = ip4_next_header (ip41); + else + udp1 = ip6_next_header (ip61); + + if (udp1->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_geneve)) + goto exit1; /* not GENEVE packet */ + + /* Validate DIP against VTEPs */ + if (is_ip4) + { +#ifdef CLIB_HAVE_VEC512 + if (!vtep4_check_vector + (&vxm->vtep_table, b1, ip41, &last_vtep4, &vtep4_u512)) +#else + if (!vtep4_check (&vxm->vtep_table, b1, ip41, &last_vtep4)) +#endif + goto exit1; /* no local VTEP for GENEVE packet */ + } + else + { + if (!vtep6_check (&vxm->vtep_table, b1, ip61, &last_vtep6)) + goto exit1; /* no local VTEP for GENEVE packet */ + } + + flags1 = b1->flags; + good_udp1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + good_udp1 |= udp1->checksum == 0; + + /* Verify UDP length */ + if (is_ip4) + ip_len1 = clib_net_to_host_u16 (ip41->length); + else + ip_len1 = clib_net_to_host_u16 (ip61->payload_length); + udp_len1 = clib_net_to_host_u16 (udp1->length); + len_diff1 = ip_len1 - udp_len1; + + /* Verify UDP checksum */ + if (PREDICT_FALSE (!good_udp1)) + { + if ((flags1 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0) + { + if (is_ip4) + flags1 = ip4_tcp_udp_validate_checksum (vm, b1); + else + flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, b1); + good_udp1 = + (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + } + } + + if (is_ip4) + { + error1 = good_udp1 ? 0 : IP4_ERROR_UDP_CHECKSUM; + error1 = (len_diff1 >= 0) ? error1 : IP4_ERROR_UDP_LENGTH; + } + else + { + error1 = good_udp1 ? 0 : IP6_ERROR_UDP_CHECKSUM; + error1 = (len_diff1 >= 0) ? error1 : IP6_ERROR_UDP_LENGTH; + } + + next1 = error1 ? + IP_GENEVE_BYPASS_NEXT_DROP : IP_GENEVE_BYPASS_NEXT_GENEVE; + b1->error = error1 ? error_node->errors[error1] : 0; + + /* geneve-input node expect current at GENEVE header */ + if (is_ip4) + vlib_buffer_advance (b1, + sizeof (ip4_header_t) + + sizeof (udp_header_t)); + else + vlib_buffer_advance (b1, + sizeof (ip6_header_t) + + sizeof (udp_header_t)); + + exit1: + 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) + { + vlib_buffer_t *b0; + ip4_header_t *ip40; + ip6_header_t *ip60; + udp_header_t *udp0; + u32 bi0, ip_len0, udp_len0, flags0, next0; + i32 len_diff0; + u8 error0, good_udp0, proto0; + + bi0 = to_next[0] = from[0]; + from += 1; + n_left_from -= 1; + to_next += 1; + n_left_to_next -= 1; + + b0 = b[0]; + b++; + if (is_ip4) + ip40 = vlib_buffer_get_current (b0); + else + ip60 = vlib_buffer_get_current (b0); + + /* Setup packet for next IP feature */ + vnet_feature_next (&next0, b0); + + if (is_ip4) + /* Treat IP4 frag packets as "experimental" protocol for now + until support of IP frag reassembly is implemented */ + proto0 = ip4_is_fragment (ip40) ? 0xfe : ip40->protocol; + else + proto0 = ip60->protocol; + + if (proto0 != IP_PROTOCOL_UDP) + goto exit; /* not UDP packet */ + + if (is_ip4) + udp0 = ip4_next_header (ip40); + else + udp0 = ip6_next_header (ip60); + + if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_geneve)) + goto exit; /* not GENEVE packet */ + + /* Validate DIP against VTEPs */ + if (is_ip4) + { +#ifdef CLIB_HAVE_VEC512 + if (!vtep4_check_vector + (&vxm->vtep_table, b0, ip40, &last_vtep4, &vtep4_u512)) +#else + if (!vtep4_check (&vxm->vtep_table, b0, ip40, &last_vtep4)) +#endif + goto exit; /* no local VTEP for GENEVE packet */ + } + else + { + if (!vtep6_check (&vxm->vtep_table, b0, ip60, &last_vtep6)) + goto exit; /* no local VTEP for GENEVE packet */ + } + + flags0 = b0->flags; + good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + good_udp0 |= udp0->checksum == 0; + + /* Verify UDP length */ + if (is_ip4) + ip_len0 = clib_net_to_host_u16 (ip40->length); + else + ip_len0 = clib_net_to_host_u16 (ip60->payload_length); + udp_len0 = clib_net_to_host_u16 (udp0->length); + len_diff0 = ip_len0 - udp_len0; + + /* Verify UDP checksum */ + if (PREDICT_FALSE (!good_udp0)) + { + if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0) + { + if (is_ip4) + flags0 = ip4_tcp_udp_validate_checksum (vm, b0); + else + flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0); + good_udp0 = + (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; + } + } + + if (is_ip4) + { + error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM; + error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH; + } + else + { + error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM; + error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH; + } + + next0 = error0 ? + IP_GENEVE_BYPASS_NEXT_DROP : IP_GENEVE_BYPASS_NEXT_GENEVE; + b0->error = error0 ? error_node->errors[error0] : 0; + + /* geneve-input node expect current at GENEVE header */ + if (is_ip4) + vlib_buffer_advance (b0, + sizeof (ip4_header_t) + + sizeof (udp_header_t)); + else + vlib_buffer_advance (b0, + sizeof (ip6_header_t) + + sizeof (udp_header_t)); + + exit: + 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 frame->n_vectors; +} + +VLIB_NODE_FN (ip4_geneve_bypass_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return ip_geneve_bypass_inline (vm, node, frame, /* is_ip4 */ 1); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ip4_geneve_bypass_node) = +{ + .name = "ip4-geneve-bypass", + .vector_size = sizeof (u32), + .n_next_nodes = IP_GENEVE_BYPASS_N_NEXT,.next_nodes = + { + [IP_GENEVE_BYPASS_NEXT_DROP] = "error-drop", + [IP_GENEVE_BYPASS_NEXT_GENEVE] = "geneve4-input", + }, + .format_buffer = format_ip4_header, + .format_trace = format_ip4_forward_next_trace, +}; +/* *INDENT-ON* */ + +VLIB_NODE_FN (ip6_geneve_bypass_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return ip_geneve_bypass_inline (vm, node, frame, /* is_ip4 */ 0); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ip6_geneve_bypass_node) = +{ + .name = "ip6-geneve-bypass", + .vector_size = sizeof (u32), + .n_next_nodes = IP_GENEVE_BYPASS_N_NEXT, + .next_nodes = + { + [IP_GENEVE_BYPASS_NEXT_DROP] = "error-drop", + [IP_GENEVE_BYPASS_NEXT_GENEVE] = "geneve6-input", + }, + .format_buffer = format_ip6_header, + .format_trace = format_ip6_forward_next_trace, +}; +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |