From e759bb543c38a682dc31492a3a0a58669a811538 Mon Sep 17 00:00:00 2001 From: Florin Coras Date: Wed, 8 Apr 2020 01:55:39 +0000 Subject: udp: cleanup input node Type: refactor Signed-off-by: Florin Coras Change-Id: Ida9daefc20a161b36d6f36c56267123c7f2efc01 --- src/vnet/udp/udp_input.c | 359 ++++++++++++++++++++++++++--------------------- 1 file changed, 197 insertions(+), 162 deletions(-) (limited to 'src/vnet/udp/udp_input.c') diff --git a/src/vnet/udp/udp_input.c b/src/vnet/udp/udp_input.c index 1c55ee57aa3..0a4af605c18 100644 --- a/src/vnet/udp/udp_input.c +++ b/src/vnet/udp/udp_input.c @@ -67,236 +67,271 @@ typedef enum always_inline void udp_input_inc_counter (vlib_main_t * vm, u8 is_ip4, u8 evt, u8 val) { - if (PREDICT_TRUE (!val)) - return; - 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; - u32 errors, *first_buffer; - u32 my_thread_index = vm->thread_index; + 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 bi0, fib_index0, data_len; - vlib_buffer_t *b0; u32 error0 = UDP_ERROR_ENQUEUED; - udp_header_t *udp0; - ip4_header_t *ip40; - ip6_header_t *ip60; - u8 *data0; - session_t *s0; - udp_connection_t *uc0, *child0, *new_uc0; - transport_connection_t *tc0; - int wrote0; - void *rmt_addr, *lcl_addr; session_dgram_hdr_t hdr0; - u8 queue_event = 1; - - /* speculatively enqueue b0 to the current next frame */ - bi0 = from[0]; - from += 1; - n_left_from -= 1; - - b0 = vlib_get_buffer (vm, bi0); - - /* udp_local hands us a pointer to the udp data */ - data0 = vlib_buffer_get_current (b0); - udp0 = (udp_header_t *) (data0 - sizeof (*udp0)); - fib_index0 = vnet_buffer (b0)->ip.fib_index; - - if (is_ip4) - { - /* TODO: must fix once udp_local does ip options correctly */ - ip40 = (ip4_header_t *) (((u8 *) udp0) - sizeof (*ip40)); - s0 = session_lookup_safe4 (fib_index0, &ip40->dst_address, - &ip40->src_address, udp0->dst_port, - udp0->src_port, TRANSPORT_PROTO_UDP); - lcl_addr = &ip40->dst_address; - rmt_addr = &ip40->src_address; - data_len = clib_net_to_host_u16 (ip40->length); - data_len -= sizeof (ip4_header_t) + sizeof (udp_header_t); - } - else - { - ip60 = (ip6_header_t *) (((u8 *) udp0) - sizeof (*ip60)); - s0 = session_lookup_safe6 (fib_index0, &ip60->dst_address, - &ip60->src_address, udp0->dst_port, - udp0->src_port, TRANSPORT_PROTO_UDP); - lcl_addr = &ip60->dst_address; - rmt_addr = &ip60->src_address; - data_len = clib_net_to_host_u16 (ip60->payload_length); - data_len -= sizeof (udp_header_t); - } + 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 trace0; + 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) { - /* TODO optimization: move cl session to right thread - * However, since such a move would affect the session handle, - * which we pass 'raw' to the app, we'd also have notify the - * app of the change or change the way we pass handles to apps. - */ - tc0 = session_get_transport (s0); - uc0 = udp_get_connection_from_transport (tc0); + u8 queue_event = 1; + uc0 = udp_connection_from_transport (session_get_transport (s0)); if (uc0->flags & UDP_CONN_F_CONNECTED) { - if (s0->thread_index != vlib_get_thread_index ()) + if (s0->thread_index != thread_index) { /* * Clone the transport. It will be cleaned up with the * session once we notify the session layer. */ - new_uc0 = - udp_connection_clone_safe (s0->connection_index, - s0->thread_index); - ASSERT (s0->session_index == new_uc0->c_s_index); + uc0 = udp_connection_clone_safe (s0->connection_index, + s0->thread_index); + ASSERT (s0->session_index == uc0->c_s_index); /* - * Drop the 'lock' on pool resize + * 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 (&new_uc0->connection, + session_dgram_connect_notify (&uc0->connection, s0->thread_index, &s0); - tc0 = &new_uc0->connection; - uc0 = new_uc0; 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) { - tc0 = session_get_transport (s0); - uc0 = udp_get_connection_from_transport (tc0); + 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) { - tc0 = listen_session_get_transport (s0); - uc0 = udp_get_connection_from_transport (tc0); + uc0 = udp_connection_from_transport (session_get_transport (s0)); if (uc0->flags & UDP_CONN_F_CONNECTED) { - child0 = udp_connection_alloc (my_thread_index); - if (is_ip4) - { - ip_set (&child0->c_lcl_ip, &ip40->dst_address, 1); - ip_set (&child0->c_rmt_ip, &ip40->src_address, 1); - } - else - { - ip_set (&child0->c_lcl_ip, &ip60->dst_address, 0); - ip_set (&child0->c_rmt_ip, &ip60->src_address, 0); - } - child0->c_lcl_port = udp0->dst_port; - child0->c_rmt_port = udp0->src_port; - child0->c_is_ip4 = is_ip4; - child0->c_fib_index = tc0->fib_index; - child0->mss = uc0->mss; - child0->flags |= UDP_CONN_F_CONNECTED; - - if (session_stream_accept (&child0->connection, - tc0->s_index, tc0->thread_index, 1)) + uc0 = udp_connection_accept (uc0, &hdr0, thread_index); + if (!uc0) { error0 = UDP_ERROR_CREATE_SESSION; - goto trace0; + goto done; } - s0 = session_get (child0->c_s_index, child0->c_thread_index); - s0->session_state = SESSION_STATE_READY; - tc0 = &child0->connection; - uc0 = udp_get_connection_from_transport (tc0); - udp_connection_share_port (clib_net_to_host_u16 - (uc0->c_lcl_port), uc0->c_is_ip4); - error0 = UDP_ERROR_LISTENER; + 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; - goto trace0; + session_pool_remove_peeker (s0->thread_index); } + done: - if (svm_fifo_max_enqueue_prod (s0->rx_fifo) - < data_len + sizeof (session_dgram_hdr_t)) - { - error0 = UDP_ERROR_FIFO_FULL; - goto trace0; - } - - hdr0.data_length = data_len; - if (PREDICT_TRUE (!(b0->flags & VLIB_BUFFER_NEXT_PRESENT))) - b0->current_length = data_len; - else - b0->total_length_not_including_first_buffer = data_len - - b0->current_length; - - hdr0.data_offset = 0; - ip_set (&hdr0.lcl_ip, lcl_addr, is_ip4); - ip_set (&hdr0.rmt_ip, rmt_addr, is_ip4); - hdr0.lcl_port = udp0->dst_port; - hdr0.rmt_port = udp0->src_port; - hdr0.is_ip4 = is_ip4; - - clib_spinlock_lock (&uc0->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 != my_thread_index) - { - wrote0 = session_enqueue_dgram_connection (s0, &hdr0, b0, - 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, b0, - TRANSPORT_PROTO_UDP, - queue_event); - } - clib_spinlock_unlock (&uc0->rx_lock); - ASSERT (wrote0 > 0); - - if (s0->session_state != SESSION_STATE_LISTENING) - session_pool_remove_peeker (s0->thread_index); - - trace0: + b += 1; + n_left_from -= 1; - b0->error = node->errors[error0]; + udp_inc_err_counter (err_counters, error0, 1); - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - udp_input_trace_t *t = vlib_add_trace (vm, node, b0, - sizeof (*t)); - - t->connection = s0 ? s0->connection_index : ~0; - t->disposition = error0; - t->thread_index = my_thread_index; - } + 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, - my_thread_index); - udp_input_inc_counter (vm, is_ip4, UDP_ERROR_EVENT_FIFO_FULL, errors); + thread_index); + err_counters[UDP_ERROR_MQ_FULL] = errors; + udp_store_err_counters (vm, is_ip4, err_counters); return frame->n_vectors; } -- cgit 1.2.3-korg