From 2b202bc4b2d870d76bfe6fb1906ae62e253cec72 Mon Sep 17 00:00:00 2001 From: Neale Ranns Date: Mon, 21 Sep 2020 08:17:51 +0000 Subject: lisp: Move to plugin Type: refactor Change-Id: I54df533a8f863c4e49742903cf2457f18b4fc506 Signed-off-by: Neale Ranns --- src/vnet/lisp-gpe/decap.c | 605 ---------------------------------------------- 1 file changed, 605 deletions(-) delete mode 100644 src/vnet/lisp-gpe/decap.c (limited to 'src/vnet/lisp-gpe/decap.c') diff --git a/src/vnet/lisp-gpe/decap.c b/src/vnet/lisp-gpe/decap.c deleted file mode 100644 index ab35c7ea73d..00000000000 --- a/src/vnet/lisp-gpe/decap.c +++ /dev/null @@ -1,605 +0,0 @@ -/* - * Copyright (c) 2016 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. - */ -/** - * @file - * @brief L2 LISP-GPE decap code. - * - */ -#include -#include -#include - -typedef struct -{ - u32 next_index; - u32 tunnel_index; - u32 error; - lisp_gpe_header_t h; -} lisp_gpe_rx_trace_t; - -static u8 * -format_lisp_gpe_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 *); - lisp_gpe_rx_trace_t *t = va_arg (*args, lisp_gpe_rx_trace_t *); - - if (t->tunnel_index != ~0) - { - s = format (s, "LISP-GPE: tunnel %d next %d error %d", t->tunnel_index, - t->next_index, t->error); - } - else - { - s = format (s, "LISP-GPE: no tunnel next %d error %d\n", t->next_index, - t->error); - } - s = format (s, "\n %U", format_lisp_gpe_header_with_length, &t->h, - (u32) sizeof (t->h) /* max size */ ); - return s; -} - -static u32 next_proto_to_next_index[LISP_GPE_NEXT_PROTOS] = { - LISP_GPE_INPUT_NEXT_DROP, - LISP_GPE_INPUT_NEXT_IP4_INPUT, - LISP_GPE_INPUT_NEXT_IP6_INPUT, - LISP_GPE_INPUT_NEXT_L2_INPUT, - LISP_GPE_INPUT_NEXT_DROP -}; - -always_inline u32 -next_protocol_to_next_index (lisp_gpe_header_t * lgh, u8 * next_header) -{ - lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main (); - - /* lisp-gpe router */ - if (PREDICT_TRUE ((lgh->flags & LISP_GPE_FLAGS_P) - || GPE_ENCAP_VXLAN == lgm->encap_mode)) - { - if (PREDICT_FALSE (lgh->next_protocol >= LISP_GPE_NEXT_PROTOS)) - return LISP_GPE_INPUT_NEXT_DROP; - - return next_proto_to_next_index[lgh->next_protocol]; - } - /* legacy lisp router */ - else if ((lgh->flags & LISP_GPE_FLAGS_P) == 0) - { - ip4_header_t *iph = (ip4_header_t *) next_header; - if ((iph->ip_version_and_header_length & 0xF0) == 0x40) - return LISP_GPE_INPUT_NEXT_IP4_INPUT; - else if ((iph->ip_version_and_header_length & 0xF0) == 0x60) - return LISP_GPE_INPUT_NEXT_IP6_INPUT; - else - return LISP_GPE_INPUT_NEXT_DROP; - } - else - return LISP_GPE_INPUT_NEXT_DROP; -} - -always_inline tunnel_lookup_t * -next_index_to_iface (lisp_gpe_main_t * lgm, u32 next_index) -{ - if (LISP_GPE_INPUT_NEXT_IP4_INPUT == next_index - || LISP_GPE_INPUT_NEXT_IP6_INPUT == next_index) - return &lgm->l3_ifaces; - else if (LISP_GPE_INPUT_NEXT_L2_INPUT == next_index) - return &lgm->l2_ifaces; - else if (LISP_GPE_INPUT_NEXT_NSH_INPUT == next_index) - return &lgm->nsh_ifaces; - clib_warning ("next_index not associated to an interface!"); - return 0; -} - -static_always_inline void -incr_decap_stats (vnet_main_t * vnm, u32 thread_index, u32 length, - u32 sw_if_index, u32 * last_sw_if_index, u32 * n_packets, - u32 * n_bytes) -{ - vnet_interface_main_t *im; - - if (PREDICT_TRUE (sw_if_index == *last_sw_if_index)) - { - *n_packets += 1; - *n_bytes += length; - } - else - { - if (PREDICT_TRUE (*last_sw_if_index != ~0)) - { - im = &vnm->interface_main; - - vlib_increment_combined_counter (im->combined_sw_if_counters + - VNET_INTERFACE_COUNTER_RX, - thread_index, *last_sw_if_index, - *n_packets, *n_bytes); - } - *last_sw_if_index = sw_if_index; - *n_packets = 1; - *n_bytes = length; - } -} - -/** - * @brief LISP-GPE decap dispatcher. - * @node lisp_gpe_input_inline - * - * LISP-GPE decap dispatcher. - * - * Decaps IP-UDP-LISP-GPE header and based on the next protocol and in the - * GPE header and the vni decides the next node to forward the packet to. - * - * @param[in] vm vlib_main_t corresponding to current thread. - * @param[in] node vlib_node_runtime_t data for this node. - * @param[in] frame vlib_frame_t whose contents should be dispatched. - * - * @return number of vectors in frame. - */ -static uword -lisp_gpe_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node, - vlib_frame_t * from_frame, u8 is_v4) -{ - u32 n_left_from, next_index, *from, *to_next, thread_index; - u32 n_bytes = 0, n_packets = 0, last_sw_if_index = ~0, drops = 0; - lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main (); - - thread_index = vm->thread_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) - { - 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; - ip4_udp_lisp_gpe_header_t *iul4_0, *iul4_1; - ip6_udp_lisp_gpe_header_t *iul6_0, *iul6_1; - lisp_gpe_header_t *lh0, *lh1; - u32 next0, next1, error0, error1; - uword *si0, *si1; - tunnel_lookup_t *tl0, *tl1; - - /* 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); - - /* udp leaves current_data pointing at the lisp header */ - if (is_v4) - { - 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))); - - iul4_0 = vlib_buffer_get_current (b0); - iul4_1 = vlib_buffer_get_current (b1); - - /* pop (ip, udp, lisp-gpe) */ - vlib_buffer_advance (b0, sizeof (*iul4_0)); - vlib_buffer_advance (b1, sizeof (*iul4_1)); - - lh0 = &iul4_0->lisp; - lh1 = &iul4_1->lisp; - } - 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))); - - iul6_0 = vlib_buffer_get_current (b0); - iul6_1 = vlib_buffer_get_current (b1); - - /* pop (ip, udp, lisp-gpe) */ - vlib_buffer_advance (b0, sizeof (*iul6_0)); - vlib_buffer_advance (b1, sizeof (*iul6_1)); - - lh0 = &iul6_0->lisp; - lh1 = &iul6_1->lisp; - } - - /* determine next_index from lisp-gpe header */ - next0 = next_protocol_to_next_index (lh0, - vlib_buffer_get_current (b0)); - next1 = next_protocol_to_next_index (lh1, - vlib_buffer_get_current (b1)); - - /* determine if tunnel is l2 or l3 */ - tl0 = next_index_to_iface (lgm, next0); - tl1 = next_index_to_iface (lgm, next1); - - /* map iid/vni to lisp-gpe sw_if_index which is used by ipx_input to - * decide the rx vrf and the input features to be applied */ - si0 = hash_get (tl0->sw_if_index_by_vni, - clib_net_to_host_u32 (lh0->iid << 8)); - si1 = hash_get (tl1->sw_if_index_by_vni, - clib_net_to_host_u32 (lh1->iid << 8)); - - - /* Required to make the l2 tag push / pop code work on l2 subifs */ - vnet_update_l2_len (b0); - vnet_update_l2_len (b1); - - if (si0) - { - incr_decap_stats (lgm->vnet_main, thread_index, - vlib_buffer_length_in_chain (vm, b0), si0[0], - &last_sw_if_index, &n_packets, &n_bytes); - vnet_buffer (b0)->sw_if_index[VLIB_RX] = si0[0]; - error0 = 0; - } - else - { - next0 = LISP_GPE_INPUT_NEXT_DROP; - error0 = LISP_GPE_ERROR_NO_TUNNEL; - drops++; - } - - if (si1) - { - incr_decap_stats (lgm->vnet_main, thread_index, - vlib_buffer_length_in_chain (vm, b1), si1[0], - &last_sw_if_index, &n_packets, &n_bytes); - vnet_buffer (b1)->sw_if_index[VLIB_RX] = si1[0]; - error1 = 0; - } - else - { - next1 = LISP_GPE_INPUT_NEXT_DROP; - error1 = LISP_GPE_ERROR_NO_TUNNEL; - drops++; - } - - b0->error = error0 ? node->errors[error0] : 0; - b1->error = error1 ? node->errors[error1] : 0; - - if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) - { - lisp_gpe_rx_trace_t *tr = vlib_add_trace (vm, node, b0, - sizeof (*tr)); - tr->next_index = next0; - tr->error = error0; - tr->h = lh0[0]; - } - - if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED)) - { - lisp_gpe_rx_trace_t *tr = vlib_add_trace (vm, node, b1, - sizeof (*tr)); - tr->next_index = next1; - tr->error = error1; - tr->h = lh1[0]; - } - - 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_udp_lisp_gpe_header_t *iul4_0; - ip6_udp_lisp_gpe_header_t *iul6_0; - lisp_gpe_header_t *lh0; - u32 error0; - uword *si0; - tunnel_lookup_t *tl0; - - 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); - - /* udp leaves current_data pointing at the lisp header - * TODO: there's no difference in processing between v4 and v6 - * encapsulated packets so the code should be simplified if ip header - * info is not going to be used for dp smrs/dpsec */ - if (is_v4) - { - vlib_buffer_advance (b0, - -(word) (sizeof (udp_header_t) + - sizeof (ip4_header_t))); - - iul4_0 = vlib_buffer_get_current (b0); - - /* pop (ip, udp, lisp-gpe) */ - vlib_buffer_advance (b0, sizeof (*iul4_0)); - - lh0 = &iul4_0->lisp; - } - else - { - vlib_buffer_advance (b0, - -(word) (sizeof (udp_header_t) + - sizeof (ip6_header_t))); - - iul6_0 = vlib_buffer_get_current (b0); - - /* pop (ip, udp, lisp-gpe) */ - vlib_buffer_advance (b0, sizeof (*iul6_0)); - - lh0 = &iul6_0->lisp; - } - - /* TODO if security is to be implemented, something similar to RPF, - * probably we'd like to check that the peer is allowed to send us - * packets. For this, we should use the tunnel table OR check that - * we have a mapping for the source eid and that the outer source of - * the packet is one of its locators */ - - /* determine next_index from lisp-gpe header */ - next0 = next_protocol_to_next_index (lh0, - vlib_buffer_get_current (b0)); - - /* determine if tunnel is l2 or l3 */ - tl0 = next_index_to_iface (lgm, next0); - - /* map iid/vni to lisp-gpe sw_if_index which is used by ipx_input to - * decide the rx vrf and the input features to be applied. - * NOTE: vni uses only the first 24 bits */ - si0 = hash_get (tl0->sw_if_index_by_vni, - clib_net_to_host_u32 (lh0->iid << 8)); - - /* Required to make the l2 tag push / pop code work on l2 subifs */ - vnet_update_l2_len (b0); - - if (si0) - { - incr_decap_stats (lgm->vnet_main, thread_index, - vlib_buffer_length_in_chain (vm, b0), si0[0], - &last_sw_if_index, &n_packets, &n_bytes); - vnet_buffer (b0)->sw_if_index[VLIB_RX] = si0[0]; - error0 = 0; - } - else - { - next0 = LISP_GPE_INPUT_NEXT_DROP; - error0 = LISP_GPE_ERROR_NO_TUNNEL; - drops++; - } - - /* TODO error handling if security is implemented */ - b0->error = error0 ? node->errors[error0] : 0; - - if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) - { - lisp_gpe_rx_trace_t *tr = vlib_add_trace (vm, node, b0, - sizeof (*tr)); - tr->next_index = next0; - tr->error = error0; - tr->h = lh0[0]; - } - - 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); - } - - /* flush iface stats */ - incr_decap_stats (lgm->vnet_main, thread_index, 0, ~0, &last_sw_if_index, - &n_packets, &n_bytes); - vlib_node_increment_counter (vm, lisp_gpe_ip4_input_node.index, - LISP_GPE_ERROR_NO_TUNNEL, drops); - return from_frame->n_vectors; -} - -static uword -lisp_gpe_ip4_input (vlib_main_t * vm, vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return lisp_gpe_input_inline (vm, node, from_frame, 1); -} - -static uword -lisp_gpe_ip6_input (vlib_main_t * vm, vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return lisp_gpe_input_inline (vm, node, from_frame, 0); -} - -static char *lisp_gpe_ip4_input_error_strings[] = { -#define lisp_gpe_error(n,s) s, -#include -#undef lisp_gpe_error -}; - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (lisp_gpe_ip4_input_node) = { - .function = lisp_gpe_ip4_input, - .name = "lisp-gpe-ip4-input", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - .n_next_nodes = LISP_GPE_INPUT_N_NEXT, - .next_nodes = { -#define _(s,n) [LISP_GPE_INPUT_NEXT_##s] = n, - foreach_lisp_gpe_ip_input_next -#undef _ - }, - - .n_errors = ARRAY_LEN (lisp_gpe_ip4_input_error_strings), - .error_strings = lisp_gpe_ip4_input_error_strings, - - .format_buffer = format_lisp_gpe_header_with_length, - .format_trace = format_lisp_gpe_rx_trace, - // $$$$ .unformat_buffer = unformat_lisp_gpe_header, -}; -/* *INDENT-ON* */ - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (lisp_gpe_ip6_input_node) = { - .function = lisp_gpe_ip6_input, - .name = "lisp-gpe-ip6-input", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - .n_next_nodes = LISP_GPE_INPUT_N_NEXT, - .next_nodes = { -#define _(s,n) [LISP_GPE_INPUT_NEXT_##s] = n, - foreach_lisp_gpe_ip_input_next -#undef _ - }, - - .n_errors = ARRAY_LEN (lisp_gpe_ip4_input_error_strings), - .error_strings = lisp_gpe_ip4_input_error_strings, - - .format_buffer = format_lisp_gpe_header_with_length, - .format_trace = format_lisp_gpe_rx_trace, - // $$$$ .unformat_buffer = unformat_lisp_gpe_header, -}; -/* *INDENT-ON* */ - -/** - * Adds arc from lisp-gpe-input to nsh-input if nsh-input is available - */ -static void -gpe_add_arc_from_input_to_nsh () -{ - lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main (); - vlib_main_t *vm = lgm->vlib_main; - vlib_node_t *nsh_input; - - /* Arc already exists */ - if (next_proto_to_next_index[LISP_GPE_NEXT_PROTO_NSH] - != LISP_GPE_INPUT_NEXT_DROP) - return; - - /* Check if nsh-input is available */ - if ((nsh_input = vlib_get_node_by_name (vm, (u8 *) "nsh-input"))) - { - u32 slot4, slot6; - slot4 = vlib_node_add_next_with_slot (vm, lisp_gpe_ip4_input_node.index, - nsh_input->index, - LISP_GPE_NEXT_PROTO_NSH); - slot6 = vlib_node_add_next_with_slot (vm, lisp_gpe_ip6_input_node.index, - nsh_input->index, - LISP_GPE_NEXT_PROTO_NSH); - ASSERT (slot4 == slot6 && slot4 == LISP_GPE_INPUT_NEXT_NSH_INPUT); - - next_proto_to_next_index[LISP_GPE_NEXT_PROTO_NSH] = slot4; - } -} - -/** GPE decap init function. */ -clib_error_t * -gpe_decap_init (vlib_main_t * vm) -{ - clib_error_t *error = 0; - - if ((error = vlib_call_init_function (vm, lisp_gpe_init))) - return error; - - gpe_add_arc_from_input_to_nsh (); - return 0; -} - -static uword -lisp_gpe_nsh_placeholder_input (vlib_main_t * vm, vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - vlib_node_increment_counter (vm, node->node_index, 0, 1); - return from_frame->n_vectors; -} - -static char *lisp_gpe_nsh_placeholder_error_strings[] = { - "lisp gpe placeholder nsh decap", -}; - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (lisp_gpe_nsh_placeholder_input_node) = { - .function = lisp_gpe_nsh_placeholder_input, - .name = "lisp-gpe-nsh-placeholder-input", - .vector_size = sizeof (u32), - .type = VLIB_NODE_TYPE_INTERNAL, - .n_next_nodes = 1, - - .n_errors = 1, - .error_strings = lisp_gpe_nsh_placeholder_error_strings, - - .next_nodes = { - [0] = "error-drop", - }, -}; -/* *INDENT-ON* */ - -static clib_error_t * -lisp_add_placeholder_nsh_node_command_fn (vlib_main_t * vm, - unformat_input_t * input, - vlib_cli_command_t * cmd) -{ - lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main (); - vlib_node_add_next (lgm->vlib_main, lisp_gpe_ip4_input_node.index, - lisp_gpe_nsh_placeholder_input_node.index); - next_proto_to_next_index[LISP_GPE_NEXT_PROTO_NSH] = - LISP_GPE_INPUT_NEXT_NSH_INPUT; - return 0; -} - -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (lisp_add_placeholder_nsh_node_command, static) = { - .path = "test one nsh add-placeholder-decap-node", - .function = lisp_add_placeholder_nsh_node_command_fn, -}; -/* *INDENT-ON* */ - -VLIB_INIT_FUNCTION (gpe_decap_init); - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ -- cgit 1.2.3-korg