misc: minimize dependencies on udp.h - vpp

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author	Florin Coras <fcoras@cisco.com>	2020-10-20 14:59:43 -0700
committer	Dave Barach <openvpp@barachs.net>	2020-10-21 10:56:34 +0000
commit	b040f98a88954ccf2e63fd7b2676865a2dbe0078 (patch)
tree	8dd81604626dbb5cda19540a439e491a197e5491 /src/plugins/dpdk/main.c
parent	8aa18562152b0d135a72d27e3dd72a831b68d0ce (diff)

misc: minimize dependencies on udp.h

Type: improvement Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: Id13f33843b230a1d169560742c4f7b2dc17d8718

Diffstat (limited to 'src/plugins/dpdk/main.c')

0 files changed, 0 insertions, 0 deletions

/* * Copyright (c) 2020 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. */ #ifndef included_gro_func_h #define included_gro_func_h #include <vnet/ethernet/ethernet.h> #include <vnet/gso/gro.h> #include <vnet/gso/hdr_offset_parser.h> #include <vnet/ip/ip4.h> #include <vnet/ip/ip6.h> #include <vnet/udp/udp_packet.h> #include <vnet/tcp/tcp_packet.h> #include <vnet/vnet.h> static_always_inline u8 gro_is_bad_packet (vlib_buffer_t * b, u8 flags, i16 l234_sz) { if (((b->current_length - l234_sz) <= 0) || ((flags &= ~TCP_FLAG_ACK) != 0)) return 1; return 0; } static_always_inline void gro_get_ip4_flow_from_packet (u32 * sw_if_index, ip4_header_t * ip4, tcp_header_t * tcp, gro_flow_key_t * flow_key, int is_l2) { flow_key->sw_if_index[VLIB_RX] = sw_if_index[VLIB_RX]; flow_key->sw_if_index[VLIB_TX] = sw_if_index[VLIB_TX]; ip46_address_set_ip4 (&flow_key->src_address, &ip4->src_address); ip46_address_set_ip4 (&flow_key->dst_address, &ip4->dst_address); flow_key->src_port = tcp->src_port; flow_key->dst_port = tcp->dst_port; } static_always_inline void gro_get_ip6_flow_from_packet (u32 * sw_if_index, ip6_header_t * ip6, tcp_header_t * tcp, gro_flow_key_t * flow_key, int is_l2) { flow_key->sw_if_index[VLIB_RX] = sw_if_index[VLIB_RX]; flow_key->sw_if_index[VLIB_TX] = sw_if_index[VLIB_TX]; ip46_address_set_ip6 (&flow_key->src_address, &ip6->src_address); ip46_address_set_ip6 (&flow_key->dst_address, &ip6->dst_address); flow_key->src_port = tcp->src_port; flow_key->dst_port = tcp->dst_port; } static_always_inline u32 gro_is_ip4_or_ip6_packet (vlib_buffer_t * b0, int is_l2) { if (b0->flags & VNET_BUFFER_F_IS_IP4) return VNET_BUFFER_F_IS_IP4; if (b0->flags & VNET_BUFFER_F_IS_IP6) return VNET_BUFFER_F_IS_IP6; if (is_l2) { ethernet_header_t *eh = (ethernet_header_t *) vlib_buffer_get_current (b0); u16 ethertype = clib_net_to_host_u16 (eh->type); if (ethernet_frame_is_tagged (ethertype)) { ethernet_vlan_header_t *vlan = (ethernet_vlan_header_t *) (eh + 1); ethertype = clib_net_to_host_u16 (vlan->type); if (ethertype == ETHERNET_TYPE_VLAN) { vlan++; ethertype = clib_net_to_host_u16 (vlan->type); } } if (ethertype == ETHERNET_TYPE_IP4) return VNET_BUFFER_F_IS_IP4; if (ethertype == ETHERNET_TYPE_IP6) return VNET_BUFFER_F_IS_IP6; } else { if ((((u8 *) vlib_buffer_get_current (b0))[0] & 0xf0) == 0x40) return VNET_BUFFER_F_IS_IP4; if ((((u8 *) vlib_buffer_get_current (b0))[0] & 0xf0) == 0x60) return VNET_BUFFER_F_IS_IP6; } return 0; } typedef enum { GRO_PACKET_ACTION_NONE = 0, GRO_PACKET_ACTION_ENQUEUE = 1, GRO_PACKET_ACTION_FLUSH = 2, } gro_packet_action_t; static_always_inline gro_packet_action_t gro_tcp_sequence_check (tcp_header_t * tcp0, tcp_header_t * tcp1, u32 payload_len0) { u32 next_tcp_seq0 = clib_net_to_host_u32 (tcp0->seq_number); u32 next_tcp_seq1 = clib_net_to_host_u32 (tcp1->seq_number); /* next packet, enqueue */ if (PREDICT_TRUE (next_tcp_seq0 + payload_len0 == next_tcp_seq1)) return GRO_PACKET_ACTION_ENQUEUE; /* flush all packets */ else return GRO_PACKET_ACTION_FLUSH; } static_always_inline void gro_merge_buffers (vlib_main_t * vm, vlib_buffer_t * b0, vlib_buffer_t * b1, u32 bi1, u32 payload_len1, u16 l234_sz1) { vlib_buffer_t *pb = b0; if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_NEXT_PRESENT) == 0)) b0->total_length_not_including_first_buffer = 0; while (pb->flags & VLIB_BUFFER_NEXT_PRESENT) pb = vlib_get_buffer (vm, pb->next_buffer); vlib_buffer_advance (b1, l234_sz1); pb->flags |= VLIB_BUFFER_NEXT_PRESENT; pb->next_buffer = bi1; b0->total_length_not_including_first_buffer += payload_len1; b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID; } static_always_inline u32 gro_validate_checksum (vlib_main_t * vm, vlib_buffer_t * b0, generic_header_offset_t * gho0, int is_ip4) { u32 flags = 0; if (b0->flags & VNET_BUFFER_F_OFFLOAD) return VNET_BUFFER_F_L4_CHECKSUM_CORRECT; vlib_buffer_advance (b0, gho0->l3_hdr_offset); if (is_ip4) flags = ip4_tcp_udp_validate_checksum (vm, b0); else flags = ip6_tcp_udp_icmp_validate_checksum (vm, b0); vlib_buffer_advance (b0, -gho0->l3_hdr_offset); return flags; } static_always_inline u32 gro_get_packet_data (vlib_main_t * vm, vlib_buffer_t * b0, generic_header_offset_t * gho0, gro_flow_key_t * flow_key0, int is_l2) { ip4_header_t *ip4_0 = 0; ip6_header_t *ip6_0 = 0; tcp_header_t *tcp0 = 0; u32 flags = 0; u32 pkt_len0 = 0; u16 l234_sz0 = 0; u32 sw_if_index0[VLIB_N_RX_TX] = { ~0 }; u32 is_ip0 = gro_is_ip4_or_ip6_packet (b0, is_l2); if (is_ip0 & VNET_BUFFER_F_IS_IP4) vnet_generic_header_offset_parser (b0, gho0, is_l2, 1 /* is_ip4 */ , 0 /* is_ip6 */ ); else if (is_ip0 & VNET_BUFFER_F_IS_IP6) vnet_generic_header_offset_parser (b0, gho0, is_l2, 0 /* is_ip4 */ , 1 /* is_ip6 */ ); else return 0; if (PREDICT_FALSE ((gho0->gho_flags & GHO_F_TCP) == 0)) return 0; ip4_0 = (ip4_header_t *) (vlib_buffer_get_current (b0) + gho0->l3_hdr_offset); ip6_0 = (ip6_header_t *) (vlib_buffer_get_current (b0) + gho0->l3_hdr_offset); tcp0 = (tcp_header_t *) (vlib_buffer_get_current (b0) + gho0->l4_hdr_offset); l234_sz0 = gho0->hdr_sz; if (PREDICT_FALSE (gro_is_bad_packet (b0, tcp0->flags, l234_sz0))) return 0; sw_if_index0[VLIB_RX] = vnet_buffer (b0)->sw_if_index[VLIB_RX]; sw_if_index0[VLIB_TX] = vnet_buffer (b0)->sw_if_index[VLIB_TX]; if (gho0->gho_flags & GHO_F_IP4) { flags = gro_validate_checksum (vm, b0, gho0, 1); gro_get_ip4_flow_from_packet (sw_if_index0, ip4_0, tcp0, flow_key0, is_l2); } else if (gho0->gho_flags & GHO_F_IP6) { flags = gro_validate_checksum (vm, b0, gho0, 0); gro_get_ip6_flow_from_packet (sw_if_index0, ip6_0, tcp0, flow_key0, is_l2); } else return 0; if ((flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) == 0) return 0; pkt_len0 = vlib_buffer_length_in_chain (vm, b0); if (PREDICT_FALSE (pkt_len0 >= TCP_MAX_GSO_SZ)) return 0; return pkt_len0; } static_always_inline u32 gro_coalesce_buffers (vlib_main_t * vm, vlib_buffer_t * b0, vlib_buffer_t * b1, u32 bi1, int is_l2) { generic_header_offset_t gho0 = { 0 }; generic_header_offset_t gho1 = { 0 }; gro_flow_key_t flow_key0, flow_key1; ip4_header_t *ip4_0, *ip4_1; ip6_header_t *ip6_0, *ip6_1; tcp_header_t *tcp0, *tcp1; u16 l234_sz0, l234_sz1; u32 pkt_len0, pkt_len1, payload_len0, payload_len1; u32 sw_if_index0[VLIB_N_RX_TX] = { ~0 }; u32 sw_if_index1[VLIB_N_RX_TX] = { ~0 }; u32 is_ip0 = gro_is_ip4_or_ip6_packet (b0, is_l2); u32 is_ip1 = gro_is_ip4_or_ip6_packet (b1, is_l2); if (is_ip0 & VNET_BUFFER_F_IS_IP4) vnet_generic_header_offset_parser (b0, &gho0, is_l2, 1 /* is_ip4 */ , 0 /* is_ip6 */ ); else if (is_ip0 & VNET_BUFFER_F_IS_IP6) vnet_generic_header_offset_parser (b0, &gho0, is_l2, 0 /* is_ip4 */ , 1 /* is_ip6 */ ); else return 0; if (is_ip1 & VNET_BUFFER_F_IS_IP4) vnet_generic_header_offset_parser (b1, &gho1, is_l2, 1 /* is_ip4 */ , 0 /* is_ip6 */ ); else if (is_ip1 & VNET_BUFFER_F_IS_IP6) vnet_generic_header_offset_parser (b1, &gho1, is_l2, 0 /* is_ip4 */ , 1 /* is_ip6 */ ); else return 0; pkt_len0 = vlib_buffer_length_in_chain (vm, b0); pkt_len1 = vlib_buffer_length_in_chain (vm, b1); if (((gho0.gho_flags & GHO_F_TCP) == 0) || ((gho1.gho_flags & GHO_F_TCP) == 0)) return 0; ip4_0 = (ip4_header_t *) (vlib_buffer_get_current (b0) + gho0.l3_hdr_offset); ip4_1 = (ip4_header_t *) (vlib_buffer_get_current (b1) + gho1.l3_hdr_offset); ip6_0 = (ip6_header_t *) (vlib_buffer_get_current (b0) + gho0.l3_hdr_offset); ip6_1 = (ip6_header_t *) (vlib_buffer_get_current (b1) + gho1.l3_hdr_offset); tcp0 = (tcp_header_t *) (vlib_buffer_get_current (b0) + gho0.l4_hdr_offset); tcp1 = (tcp_header_t *) (vlib_buffer_get_current (b1) + gho1.l4_hdr_offset); l234_sz0 = gho0.hdr_sz; l234_sz1 = gho1.hdr_sz; if (gro_is_bad_packet (b0, tcp0->flags, l234_sz0) || gro_is_bad_packet (b1, tcp1->flags, l234_sz1)) return 0; sw_if_index0[VLIB_RX] = vnet_buffer (b0)->sw_if_index[VLIB_RX]; sw_if_index0[VLIB_TX] = vnet_buffer (b0)->sw_if_index[VLIB_TX]; sw_if_index1[VLIB_RX] = vnet_buffer (b1)->sw_if_index[VLIB_RX]; sw_if_index1[VLIB_TX] = vnet_buffer (b1)->sw_if_index[VLIB_TX]; if ((gho0.gho_flags & GHO_F_IP4) && (gho1.gho_flags & GHO_F_IP4)) { gro_get_ip4_flow_from_packet (sw_if_index0, ip4_0, tcp0, &flow_key0, is_l2); gro_get_ip4_flow_from_packet (sw_if_index1, ip4_1, tcp1, &flow_key1, is_l2); } else if ((gho0.gho_flags & GHO_F_IP6) && (gho1.gho_flags & GHO_F_IP6)) { gro_get_ip6_flow_from_packet (sw_if_index0, ip6_0, tcp0, &flow_key0, is_l2); gro_get_ip6_flow_from_packet (sw_if_index1, ip6_1, tcp1, &flow_key1, is_l2); } else return 0; if (gro_flow_is_equal (&flow_key0, &flow_key1) == 0) return 0; payload_len0 = pkt_len0 - l234_sz0; payload_len1 = pkt_len1 - l234_sz1; if (pkt_len0 >= TCP_MAX_GSO_SZ || pkt_len1 >= TCP_MAX_GSO_SZ || (pkt_len0 + payload_len1) >= TCP_MAX_GSO_SZ) return 0; if (gro_tcp_sequence_check (tcp0, tcp1, payload_len0) == GRO_PACKET_ACTION_ENQUEUE) { gro_merge_buffers (vm, b0, b1, bi1, payload_len1, l234_sz1); return tcp1->ack_number; } return 0; } static_always_inline void gro_fixup_header (vlib_main_t * vm, vlib_buffer_t * b0, u32 ack_number, int is_l2) { generic_header_offset_t gho0 = { 0 }; u32 is_ip0 = gro_is_ip4_or_ip6_packet (b0, is_l2); if (is_ip0 & VNET_BUFFER_F_IS_IP4) vnet_generic_header_offset_parser (b0, &gho0, is_l2, 1 /* is_ip4 */ , 0 /* is_ip6 */ ); else if (is_ip0 & VNET_BUFFER_F_IS_IP6) vnet_generic_header_offset_parser (b0, &gho0, is_l2, 0 /* is_ip4 */ , 1 /* is_ip6 */ ); vnet_buffer2 (b0)->gso_size = b0->current_length - gho0.hdr_sz; if (gho0.gho_flags & GHO_F_IP4) { ip4_header_t *ip4 = (ip4_header_t *) (vlib_buffer_get_current (b0) + gho0.l3_hdr_offset); ip4->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) - gho0.l3_hdr_offset); b0->flags |= (VNET_BUFFER_F_GSO | VNET_BUFFER_F_IS_IP4); vnet_buffer_offload_flags_set (b0, (VNET_BUFFER_OFFLOAD_F_TCP_CKSUM | VNET_BUFFER_OFFLOAD_F_IP_CKSUM)); } else if (gho0.gho_flags & GHO_F_IP6) { ip6_header_t *ip6 = (ip6_header_t *) (vlib_buffer_get_current (b0) + gho0.l3_hdr_offset); ip6->payload_length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) - gho0.l4_hdr_offset); b0->flags |= (VNET_BUFFER_F_GSO | VNET_BUFFER_F_IS_IP6); vnet_buffer_offload_flags_set (b0, VNET_BUFFER_OFFLOAD_F_TCP_CKSUM); } tcp_header_t *tcp0 = (tcp_header_t *) (vlib_buffer_get_current (b0) + gho0.l4_hdr_offset); tcp0->ack_number = ack_number; b0->flags &= ~VLIB_BUFFER_IS_TRACED; } static_always_inline u32 vnet_gro_flow_table_flush (vlib_main_t * vm, gro_flow_table_t * flow_table, u32 * to) { if (flow_table->flow_table_size > 0) { gro_flow_t *gro_flow; u32 i = 0, j = 0; while (i < GRO_FLOW_TABLE_MAX_SIZE) { gro_flow = &flow_table->gro_flow[i]; if (gro_flow->n_buffers && gro_flow_is_timeout (vm, gro_flow)) { // flush the packet vlib_buffer_t *b0 = vlib_get_buffer (vm, gro_flow->buffer_index); gro_fixup_header (vm, b0, gro_flow->last_ack_number, flow_table->is_l2); to[j] = gro_flow->buffer_index; gro_flow_table_reset_flow (flow_table, gro_flow); flow_table->n_vectors++; j++; } i++; } return j; } return 0; } static_always_inline void vnet_gro_flow_table_schedule_node_on_dispatcher (vlib_main_t * vm, gro_flow_table_t * flow_table) { if (gro_flow_table_is_timeout (vm, flow_table)) { u32 to[GRO_FLOW_TABLE_MAX_SIZE] = { 0 }; u32 n_to = vnet_gro_flow_table_flush (vm, flow_table, to); if (n_to > 0) { u32 node_index = flow_table->node_index; vlib_frame_t *f = vlib_get_frame_to_node (vm, node_index); u32 *f_to = vlib_frame_vector_args (f); u32 i = 0; while (i < n_to) { f_to[f->n_vectors] = to[i]; i++; f->n_vectors++; } vlib_put_frame_to_node (vm, node_index, f); } gro_flow_table_set_timeout (vm, flow_table, GRO_FLOW_TABLE_FLUSH); } } static_always_inline u32 vnet_gro_flow_table_inline (vlib_main_t * vm, gro_flow_table_t * flow_table, u32 bi0, u32 * to) { vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0); generic_header_offset_t gho0 = { 0 }; gro_flow_t *gro_flow = 0; gro_flow_key_t flow_key0 = { }; tcp_header_t *tcp0 = 0; u32 pkt_len0 = 0; int is_l2 = flow_table->is_l2; if (!gro_flow_table_is_enable (flow_table)) { to[0] = bi0; return 1; } if (PREDICT_FALSE (b0->flags & VNET_BUFFER_F_GSO)) { to[0] = bi0; return 1; } pkt_len0 = gro_get_packet_data (vm, b0, &gho0, &flow_key0, is_l2); if (pkt_len0 == 0) { to[0] = bi0; return 1; } gro_flow = gro_flow_table_find_or_add_flow (flow_table, &flow_key0); if (!gro_flow) { to[0] = bi0; return 1; } if (PREDICT_FALSE (gro_flow->n_buffers == 0)) { flow_table->total_vectors++; gro_flow_store_packet (gro_flow, bi0); tcp0 = (tcp_header_t *) (vlib_buffer_get_current (b0) + gho0.l4_hdr_offset); gro_flow->last_ack_number = tcp0->ack_number; gro_flow_set_timeout (vm, gro_flow, GRO_FLOW_TIMEOUT); return 0; } else { tcp0 = (tcp_header_t *) (vlib_buffer_get_current (b0) + gho0.l4_hdr_offset); generic_header_offset_t gho_s = { 0 }; tcp_header_t *tcp_s; u16 l234_sz0, l234_sz_s; u32 pkt_len_s, payload_len0, payload_len_s; u32 bi_s = gro_flow->buffer_index; vlib_buffer_t *b_s = vlib_get_buffer (vm, bi_s); u32 is_ip_s = gro_is_ip4_or_ip6_packet (b_s, is_l2); if (is_ip_s & VNET_BUFFER_F_IS_IP4) vnet_generic_header_offset_parser (b_s, &gho_s, is_l2, 1 /* is_ip4 */ , 0 /* is_ip6 */ ); else if (is_ip_s & VNET_BUFFER_F_IS_IP6) vnet_generic_header_offset_parser (b_s, &gho_s, is_l2, 0 /* is_ip4 */ , 1 /* is_ip6 */ ); tcp_s = (tcp_header_t *) (vlib_buffer_get_current (b_s) + gho_s.l4_hdr_offset); pkt_len_s = vlib_buffer_length_in_chain (vm, b_s); l234_sz0 = gho0.hdr_sz; l234_sz_s = gho_s.hdr_sz; payload_len0 = pkt_len0 - l234_sz0; payload_len_s = pkt_len_s - l234_sz_s; gro_packet_action_t action = gro_tcp_sequence_check (tcp_s, tcp0, payload_len_s); if (PREDICT_TRUE (action == GRO_PACKET_ACTION_ENQUEUE)) { if (PREDICT_TRUE ((pkt_len_s + payload_len0) < TCP_MAX_GSO_SZ)) { flow_table->total_vectors++; gro_merge_buffers (vm, b_s, b0, bi0, payload_len0, l234_sz0); gro_flow_store_packet (gro_flow, bi0); gro_flow->last_ack_number = tcp0->ack_number; return 0; } else { // flush the stored GSO size packet and buffer the current packet flow_table->n_vectors++; flow_table->total_vectors++; gro_fixup_header (vm, b_s, gro_flow->last_ack_number, is_l2); gro_flow->n_buffers = 0; gro_flow_store_packet (gro_flow, bi0); gro_flow->last_ack_number = tcp0->ack_number; gro_flow_set_timeout (vm, gro_flow, GRO_FLOW_TIMEOUT); to[0] = bi_s; return 1; } } else { // flush the all (current and stored) packets flow_table->n_vectors++; flow_table->total_vectors++; gro_fixup_header (vm, b_s, gro_flow->last_ack_number, is_l2); gro_flow->n_buffers = 0; gro_flow_table_reset_flow (flow_table, gro_flow); to[0] = bi_s; to[1] = bi0; return 2; } } } /** * coalesce buffers with flow tables */ static_always_inline u32 vnet_gro_inline (vlib_main_t * vm, gro_flow_table_t * flow_table, u32 * from, u16 n_left_from, u32 * to) { u16 count = 0, i = 0; for (i = 0; i < n_left_from; i++) count += vnet_gro_flow_table_inline (vm, flow_table, from[i], &to[count]); return count; } /** * coalesce buffers in opportunistic way without flow tables */ static_always_inline u32 vnet_gro_simple_inline (vlib_main_t * vm, u32 * from, u16 n_left_from, int is_l2) { vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; vlib_get_buffers (vm, from, b, n_left_from); u32 bi = 1, ack_number = 0; if (PREDICT_TRUE (((b[0]->flags & VNET_BUFFER_F_GSO) == 0))) { while (n_left_from > 1) { if (PREDICT_TRUE (((b[bi]->flags & VNET_BUFFER_F_GSO) == 0))) { u32 ret; if ((ret = gro_coalesce_buffers (vm, b[0], b[bi], from[bi], is_l2)) != 0) { n_left_from -= 1; bi += 1; ack_number = ret; continue; } else break; } else break; } if (bi >= 2) { gro_fixup_header (vm, b[0], ack_number, is_l2); } } return bi; } #endif /* included_gro_func_h */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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