vpp - Vector Packet Processing

Age	Commit message (Expand)	Author	Files	Lines
2019-04-10	Tests Cleanup: Fix missing calls to setUpClass/tearDownClass.	Paul Vinciguerra	1	-0/+8
2019-01-31	IPSEC: API modernisation	Neale Ranns	1	-11/+12
2019-01-29	make test: remove generic imports	Klement Sekera	1	-1/+1
2019-01-24	IPSEC Tests: to per-test setup and tearDown	Neale Ranns	1	-18/+26
2018-11-15	ipsec: infra for selecting backends	Klement Sekera	1	-0/+78

/* * Copyright (c) 2016-2019 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 <vlibmemory/api.h> #include <vlib/vlib.h> #include <vppinfra/hash.h> #include <vppinfra/error.h> #include <vppinfra/elog.h> #include <vnet/vnet.h> #include <vnet/pg/pg.h> #include <vnet/ip/ip.h> #include <vnet/udp/udp.h> #include <vnet/udp/udp_packet.h> #include <vnet/session/session.h> static char *udp_error_strings[] = { #define udp_error(n,s) s, #include "udp_error.def" #undef udp_error }; typedef struct { u32 connection; u32 disposition; u32 thread_index; } udp_input_trace_t; /* packet trace format function */ static u8 * format_udp_input_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 *); udp_input_trace_t *t = va_arg (*args, udp_input_trace_t *); s = format (s, "UDP_INPUT: connection %d, disposition %d, thread %d", t->connection, t->disposition, t->thread_index); return s; } #define foreach_udp_input_next \ _ (DROP, "error-drop") typedef enum { #define _(s, n) UDP_INPUT_NEXT_##s, foreach_udp_input_next #undef _ UDP_INPUT_N_NEXT, } udp_input_next_t; always_inline void udp_input_inc_counter (vlib_main_t * vm, u8 is_ip4, u8 evt, u8 val) { if (is_ip4) vlib_node_increment_counter (vm, udp4_input_node.index, evt, val); else vlib_node_increment_counter (vm, udp6_input_node.index, evt, val); } #define udp_store_err_counters(vm, is_ip4, cnts) \ { \ int i; \ for (i = 0; i < UDP_N_ERROR; i++) \ if (cnts[i]) \ udp_input_inc_counter(vm, is_ip4, i, cnts[i]); \ } #define udp_inc_err_counter(cnts, err, val) \ { \ cnts[err] += val; \ } static void udp_trace_buffer (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_buffer_t * b, session_t * s, u16 error0) { udp_input_trace_t *t; if (PREDICT_TRUE (!(b->flags & VLIB_BUFFER_IS_TRACED))) return; t = vlib_add_trace (vm, node, b, sizeof (*t)); t->connection = s ? s->connection_index : ~0; t->disposition = error0; t->thread_index = s->thread_index; } static udp_connection_t * udp_connection_accept (udp_connection_t * listener, session_dgram_hdr_t * hdr, u32 thread_index) { udp_connection_t *uc; uc = udp_connection_alloc (thread_index); ip_copy (&uc->c_lcl_ip, &hdr->lcl_ip, hdr->is_ip4); ip_copy (&uc->c_rmt_ip, &hdr->rmt_ip, hdr->is_ip4); uc->c_lcl_port = hdr->lcl_port; uc->c_rmt_port = hdr->rmt_port; uc->c_is_ip4 = hdr->is_ip4; uc->c_fib_index = listener->c_fib_index; uc->mss = listener->mss; uc->flags |= UDP_CONN_F_CONNECTED; if (session_dgram_accept (&uc->connection, listener->c_s_index, listener->c_thread_index)) { udp_connection_free (uc); return 0; } udp_connection_share_port (clib_net_to_host_u16 (uc->c_lcl_port), uc->c_is_ip4); return uc; } static void udp_connection_enqueue (udp_connection_t * uc0, session_t * s0, session_dgram_hdr_t * hdr0, u32 thread_index, vlib_buffer_t * b, u8 queue_event, u32 * error0) { int wrote0; clib_spinlock_lock (&uc0->rx_lock); if (svm_fifo_max_enqueue_prod (s0->rx_fifo) < hdr0->data_length + sizeof (session_dgram_hdr_t)) { *error0 = UDP_ERROR_FIFO_FULL; goto unlock_rx_lock; } /* If session is owned by another thread and rx event needed, * enqueue event now while we still have the peeker lock */ if (s0->thread_index != thread_index) { wrote0 = session_enqueue_dgram_connection (s0, hdr0, b, TRANSPORT_PROTO_UDP, /* queue event */ 0); if (queue_event && !svm_fifo_has_event (s0->rx_fifo)) session_enqueue_notify (s0); } else { wrote0 = session_enqueue_dgram_connection (s0, hdr0, b, TRANSPORT_PROTO_UDP, queue_event); } ASSERT (wrote0 > 0); unlock_rx_lock: clib_spinlock_unlock (&uc0->rx_lock); } always_inline session_t * udp_parse_and_lookup_buffer (vlib_buffer_t * b, session_dgram_hdr_t * hdr, u8 is_ip4) { udp_header_t *udp; u32 fib_index; session_t *s; /* udp_local hands us a pointer to the udp data */ udp = (udp_header_t *) (vlib_buffer_get_current (b) - sizeof (*udp)); fib_index = vnet_buffer (b)->ip.fib_index; hdr->data_offset = 0; hdr->lcl_port = udp->dst_port; hdr->rmt_port = udp->src_port; hdr->is_ip4 = is_ip4; if (is_ip4) { ip4_header_t *ip4; /* TODO: must fix once udp_local does ip options correctly */ ip4 = (ip4_header_t *) (((u8 *) udp) - sizeof (*ip4)); ip_set (&hdr->lcl_ip, &ip4->dst_address, 1); ip_set (&hdr->rmt_ip, &ip4->src_address, 1); hdr->data_length = clib_net_to_host_u16 (ip4->length); hdr->data_length -= sizeof (ip4_header_t) + sizeof (udp_header_t); s = session_lookup_safe4 (fib_index, &ip4->dst_address, &ip4->src_address, udp->dst_port, udp->src_port, TRANSPORT_PROTO_UDP); } else { ip6_header_t *ip60; ip60 = (ip6_header_t *) (((u8 *) udp) - sizeof (*ip60)); ip_set (&hdr->lcl_ip, &ip60->dst_address, 0); ip_set (&hdr->rmt_ip, &ip60->src_address, 0); hdr->data_length = clib_net_to_host_u16 (ip60->payload_length); hdr->data_length -= sizeof (udp_header_t); s = session_lookup_safe6 (fib_index, &ip60->dst_address, &ip60->src_address, udp->dst_port, udp->src_port, TRANSPORT_PROTO_UDP); } if (PREDICT_TRUE (!(b->flags & VLIB_BUFFER_NEXT_PRESENT))) b->current_length = hdr->data_length; else b->total_length_not_including_first_buffer = hdr->data_length - b->current_length; return s; } always_inline uword udp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, u8 is_ip4) { u32 n_left_from, *from, errors, *first_buffer; vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b; u16 err_counters[UDP_N_ERROR] = { 0 }; u32 thread_index = vm->thread_index; from = first_buffer = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; vlib_get_buffers (vm, from, bufs, n_left_from); b = bufs; while (n_left_from > 0) { u32 error0 = UDP_ERROR_ENQUEUED; session_dgram_hdr_t hdr0; udp_connection_t *uc0; session_t *s0; s0 = udp_parse_and_lookup_buffer (b[0], &hdr0, is_ip4); if (PREDICT_FALSE (!s0)) { error0 = UDP_ERROR_NO_LISTENER; goto done; } /* * If session exists pool peeker lock is taken at this point unless * the session is already on the right thread or is a listener */ if (s0->session_state == SESSION_STATE_OPENED) { u8 queue_event = 1; uc0 = udp_connection_from_transport (session_get_transport (s0)); if (uc0->flags & UDP_CONN_F_CONNECTED) { if (s0->thread_index != thread_index) { /* * Clone the transport. It will be cleaned up with the * session once we notify the session layer. */ uc0 = udp_connection_clone_safe (s0->connection_index, s0->thread_index); ASSERT (s0->session_index == uc0->c_s_index); /* * Drop the peeker lock on pool resize and ask session * layer for a new session. */ session_pool_remove_peeker (s0->thread_index); session_dgram_connect_notify (&uc0->connection, s0->thread_index, &s0); queue_event = 0; } else s0->session_state = SESSION_STATE_READY; } udp_connection_enqueue (uc0, s0, &hdr0, thread_index, b[0], queue_event, &error0); session_pool_remove_peeker (s0->thread_index); } else if (s0->session_state == SESSION_STATE_READY) { uc0 = udp_connection_from_transport (session_get_transport (s0)); udp_connection_enqueue (uc0, s0, &hdr0, thread_index, b[0], 1, &error0); } else if (s0->session_state == SESSION_STATE_LISTENING) { uc0 = udp_connection_from_transport (session_get_transport (s0)); if (uc0->flags & UDP_CONN_F_CONNECTED) { uc0 = udp_connection_accept (uc0, &hdr0, thread_index); if (!uc0) { error0 = UDP_ERROR_CREATE_SESSION; goto done; } s0 = session_get (uc0->c_s_index, uc0->c_thread_index); error0 = UDP_ERROR_ACCEPT; } udp_connection_enqueue (uc0, s0, &hdr0, thread_index, b[0], 1, &error0); } else { error0 = UDP_ERROR_NOT_READY; session_pool_remove_peeker (s0->thread_index); } done: b += 1; n_left_from -= 1; udp_inc_err_counter (err_counters, error0, 1); if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE)) udp_trace_buffer (vm, node, b[0], s0, error0); } vlib_buffer_free (vm, first_buffer, frame->n_vectors); errors = session_main_flush_enqueue_events (TRANSPORT_PROTO_UDP, thread_index); err_counters[UDP_ERROR_MQ_FULL] = errors; udp_store_err_counters (vm, is_ip4, err_counters); return frame->n_vectors; } static uword udp4_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return udp46_input_inline (vm, node, frame, 1); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (udp4_input_node) = { .function = udp4_input, .name = "udp4-input", .vector_size = sizeof (u32), .format_trace = format_udp_input_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (udp_error_strings), .error_strings = udp_error_strings, .n_next_nodes = UDP_INPUT_N_NEXT, .next_nodes = { #define _(s, n) [UDP_INPUT_NEXT_##s] = n, foreach_udp_input_next #undef _ }, }; /* *INDENT-ON* */ static uword udp6_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return udp46_input_inline (vm, node, frame, 0); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (udp6_input_node) = { .function = udp6_input, .name = "udp6-input", .vector_size = sizeof (u32), .format_trace = format_udp_input_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (udp_error_strings), .error_strings = udp_error_strings, .n_next_nodes = UDP_INPUT_N_NEXT, .next_nodes = { #define _(s, n) [UDP_INPUT_NEXT_##s] = n, foreach_udp_input_next #undef _ }, }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */