diff options
Diffstat (limited to 'src/vnet/devices/af_packet/node.c')
| -rw-r--r-- | src/vnet/devices/af_packet/node.c | 845 |
1 files changed, 0 insertions, 845 deletions
diff --git a/src/vnet/devices/af_packet/node.c b/src/vnet/devices/af_packet/node.c deleted file mode 100644 index 724924f5f4b..00000000000 --- a/src/vnet/devices/af_packet/node.c +++ /dev/null @@ -1,845 +0,0 @@ -/* - *------------------------------------------------------------------ - * af_packet.c - linux kernel packet interface - * - * 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. - *------------------------------------------------------------------ - */ - -#include <linux/if_packet.h> - -#include <vlib/vlib.h> -#include <vlib/unix/unix.h> -#include <vnet/ip/ip.h> -#include <vnet/ethernet/ethernet.h> -#include <vnet/interface/rx_queue_funcs.h> -#include <vnet/feature/feature.h> -#include <vnet/ethernet/packet.h> - -#include <vnet/devices/af_packet/af_packet.h> -#include <vnet/devices/virtio/virtio_std.h> - -#define foreach_af_packet_input_error \ - _ (PARTIAL_PKT, "partial packet") \ - _ (TIMEDOUT_BLK, "timed out block") \ - _ (TOTAL_RECV_BLK, "total received block") -typedef enum -{ -#define _(f,s) AF_PACKET_INPUT_ERROR_##f, - foreach_af_packet_input_error -#undef _ - AF_PACKET_INPUT_N_ERROR, -} af_packet_input_error_t; - -static char *af_packet_input_error_strings[] = { -#define _(n,s) s, - foreach_af_packet_input_error -#undef _ -}; - -typedef struct -{ - u32 next_index; - u32 hw_if_index; - u16 queue_id; - int block; - u32 pkt_num; - void *block_start; - block_desc_t bd; - union - { - tpacket3_hdr_t tph3; - tpacket2_hdr_t tph2; - }; - vnet_virtio_net_hdr_t vnet_hdr; - u8 is_v3; -} af_packet_input_trace_t; - -static u8 * -format_af_packet_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 *); - af_packet_input_trace_t *t = va_arg (*args, af_packet_input_trace_t *); - u32 indent = format_get_indent (s); - - s = format (s, "af_packet: hw_if_index %d rx-queue %u next-index %d", - t->hw_if_index, t->queue_id, t->next_index); - - if (t->is_v3) - { - s = format ( - s, "\n%Ublock %u:\n%Uaddress %p version %u seq_num %lu pkt_num %u", - format_white_space, indent + 2, t->block, format_white_space, - indent + 4, t->block_start, t->bd.version, t->bd.hdr.bh1.seq_num, - t->pkt_num); - s = format ( - s, - "\n%Utpacket3_hdr:\n%Ustatus 0x%x len %u snaplen %u mac %u net %u" - "\n%Usec 0x%x nsec 0x%x vlan %U" -#ifdef TP_STATUS_VLAN_TPID_VALID - " vlan_tpid %u" -#endif - , - format_white_space, indent + 2, format_white_space, indent + 4, - t->tph3.tp_status, t->tph3.tp_len, t->tph3.tp_snaplen, t->tph3.tp_mac, - t->tph3.tp_net, format_white_space, indent + 4, t->tph3.tp_sec, - t->tph3.tp_nsec, format_ethernet_vlan_tci, t->tph3.hv1.tp_vlan_tci -#ifdef TP_STATUS_VLAN_TPID_VALID - , - t->tph3.hv1.tp_vlan_tpid -#endif - ); - } - else - { - s = format ( - s, - "\n%Utpacket2_hdr:\n%Ustatus 0x%x len %u snaplen %u mac %u net %u" - "\n%Usec 0x%x nsec 0x%x vlan %U" -#ifdef TP_STATUS_VLAN_TPID_VALID - " vlan_tpid %u" -#endif - , - format_white_space, indent + 2, format_white_space, indent + 4, - t->tph2.tp_status, t->tph2.tp_len, t->tph2.tp_snaplen, t->tph2.tp_mac, - t->tph2.tp_net, format_white_space, indent + 4, t->tph2.tp_sec, - t->tph2.tp_nsec, format_ethernet_vlan_tci, t->tph2.tp_vlan_tci -#ifdef TP_STATUS_VLAN_TPID_VALID - , - t->tph2.tp_vlan_tpid -#endif - ); - } - - s = format (s, - "\n%Uvnet-hdr:\n%Uflags 0x%02x gso_type 0x%02x hdr_len %u" - "\n%Ugso_size %u csum_start %u csum_offset %u", - format_white_space, indent + 2, format_white_space, indent + 4, - t->vnet_hdr.flags, t->vnet_hdr.gso_type, t->vnet_hdr.hdr_len, - format_white_space, indent + 4, t->vnet_hdr.gso_size, - t->vnet_hdr.csum_start, t->vnet_hdr.csum_offset); - return s; -} - -always_inline void -buffer_add_to_chain (vlib_buffer_t *b, vlib_buffer_t *first_b, - vlib_buffer_t *prev_b, u32 bi) -{ - /* update first buffer */ - first_b->total_length_not_including_first_buffer += b->current_length; - - /* update previous buffer */ - prev_b->next_buffer = bi; - prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT; - - /* update current buffer */ - b->next_buffer = ~0; -} - -static_always_inline void -fill_gso_offload (vlib_buffer_t *b, u32 gso_size, u8 l4_hdr_sz) -{ - b->flags |= VNET_BUFFER_F_GSO; - vnet_buffer2 (b)->gso_size = gso_size; - vnet_buffer2 (b)->gso_l4_hdr_sz = l4_hdr_sz; -} - -static_always_inline void -fill_cksum_offload (vlib_buffer_t *b, u8 *l4_hdr_sz, u8 is_ip) -{ - vnet_buffer_oflags_t oflags = 0; - u16 l2hdr_sz = 0; - u16 ethertype = 0; - u8 l4_proto = 0; - - if (is_ip) - { - switch (b->data[0] & 0xf0) - { - case 0x40: - ethertype = ETHERNET_TYPE_IP4; - break; - case 0x60: - ethertype = ETHERNET_TYPE_IP6; - break; - } - } - else - { - ethernet_header_t *eth = (ethernet_header_t *) b->data; - ethertype = clib_net_to_host_u16 (eth->type); - l2hdr_sz = sizeof (ethernet_header_t); - if (ethernet_frame_is_tagged (ethertype)) - { - ethernet_vlan_header_t *vlan = (ethernet_vlan_header_t *) (eth + 1); - - ethertype = clib_net_to_host_u16 (vlan->type); - l2hdr_sz += sizeof (*vlan); - if (ethertype == ETHERNET_TYPE_VLAN) - { - vlan++; - ethertype = clib_net_to_host_u16 (vlan->type); - l2hdr_sz += sizeof (*vlan); - } - } - } - - vnet_buffer (b)->l2_hdr_offset = 0; - vnet_buffer (b)->l3_hdr_offset = l2hdr_sz; - - if (ethertype == ETHERNET_TYPE_IP4) - { - ip4_header_t *ip4 = (ip4_header_t *) (b->data + l2hdr_sz); - vnet_buffer (b)->l4_hdr_offset = l2hdr_sz + ip4_header_bytes (ip4); - b->flags |= (VNET_BUFFER_F_IS_IP4 | VNET_BUFFER_F_L2_HDR_OFFSET_VALID | - VNET_BUFFER_F_L3_HDR_OFFSET_VALID | - VNET_BUFFER_F_L4_HDR_OFFSET_VALID); - - l4_proto = ip4->protocol; - } - else if (ethertype == ETHERNET_TYPE_IP6) - { - ip6_header_t *ip6 = (ip6_header_t *) (b->data + l2hdr_sz); - b->flags |= (VNET_BUFFER_F_IS_IP6 | VNET_BUFFER_F_L2_HDR_OFFSET_VALID | - VNET_BUFFER_F_L3_HDR_OFFSET_VALID | - VNET_BUFFER_F_L4_HDR_OFFSET_VALID); - u16 ip6_hdr_len = sizeof (ip6_header_t); - - if (ip6_ext_hdr (ip6->protocol)) - { - ip6_ext_header_t *p = (void *) (ip6 + 1); - ip6_hdr_len += ip6_ext_header_len (p); - while (ip6_ext_hdr (p->next_hdr)) - { - ip6_hdr_len += ip6_ext_header_len (p); - p = ip6_ext_next_header (p); - } - l4_proto = p->next_hdr; - } - else - l4_proto = ip6->protocol; - vnet_buffer (b)->l4_hdr_offset = l2hdr_sz + ip6_hdr_len; - } - - if (l4_proto == IP_PROTOCOL_TCP) - { - oflags |= VNET_BUFFER_OFFLOAD_F_TCP_CKSUM; - tcp_header_t *tcp = - (tcp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset); - *l4_hdr_sz = tcp_header_bytes (tcp); - } - else if (l4_proto == IP_PROTOCOL_UDP) - { - oflags |= VNET_BUFFER_OFFLOAD_F_UDP_CKSUM; - *l4_hdr_sz = sizeof (udp_header_t); - } - - if (oflags) - vnet_buffer_offload_flags_set (b, oflags); -} - -always_inline uword -af_packet_v3_device_input_fn (vlib_main_t *vm, vlib_node_runtime_t *node, - vlib_frame_t *frame, af_packet_if_t *apif, - u16 queue_id, u8 is_cksum_gso_enabled) -{ - af_packet_main_t *apm = &af_packet_main; - af_packet_queue_t *rx_queue = vec_elt_at_index (apif->rx_queues, queue_id); - tpacket3_hdr_t *tph; - u32 next_index; - u32 n_free_bufs; - u32 n_rx_packets = 0; - u32 n_rx_bytes = 0; - u32 timedout_blk = 0; - u32 total = 0; - u32 *to_next = 0; - u32 block = rx_queue->next_rx_block; - u32 block_nr = rx_queue->rx_req->req3.tp_block_nr; - u8 *block_start = 0; - uword n_trace = vlib_get_trace_count (vm, node); - u32 thread_index = vm->thread_index; - u32 n_buffer_bytes = vlib_buffer_get_default_data_size (vm); - u32 min_bufs = rx_queue->rx_req->req3.tp_frame_size / n_buffer_bytes; - u32 num_pkts = 0; - u32 rx_frame_offset = 0; - block_desc_t *bd = 0; - vlib_buffer_t bt = {}; - u8 is_ip = (apif->mode == AF_PACKET_IF_MODE_IP); - - if (is_ip) - next_index = VNET_DEVICE_INPUT_NEXT_IP4_INPUT; - else - { - next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT; - if (PREDICT_FALSE (apif->per_interface_next_index != ~0)) - next_index = apif->per_interface_next_index; - - /* redirect if feature path enabled */ - vnet_feature_start_device_input_x1 (apif->sw_if_index, &next_index, &bt); - } - - if ((((block_desc_t *) (block_start = rx_queue->rx_ring[block])) - ->hdr.bh1.block_status & - TP_STATUS_USER) != 0) - { - u32 n_required = 0; - bd = (block_desc_t *) block_start; - - if (PREDICT_FALSE (rx_queue->is_rx_pending)) - { - num_pkts = rx_queue->num_rx_pkts; - rx_frame_offset = rx_queue->rx_frame_offset; - rx_queue->is_rx_pending = 0; - } - else - { - num_pkts = bd->hdr.bh1.num_pkts; - rx_frame_offset = sizeof (block_desc_t); - total++; - - if (TP_STATUS_BLK_TMO & bd->hdr.bh1.block_status) - timedout_blk++; - } - - n_required = clib_max (num_pkts, VLIB_FRAME_SIZE); - n_free_bufs = vec_len (apm->rx_buffers[thread_index]); - if (PREDICT_FALSE (n_free_bufs < n_required)) - { - vec_validate (apm->rx_buffers[thread_index], - n_required + n_free_bufs - 1); - n_free_bufs += vlib_buffer_alloc ( - vm, &apm->rx_buffers[thread_index][n_free_bufs], n_required); - vec_set_len (apm->rx_buffers[thread_index], n_free_bufs); - } - - while (num_pkts && (n_free_bufs >= min_bufs)) - { - u32 next0 = next_index; - u32 n_left_to_next; - - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (num_pkts && n_left_to_next && (n_free_bufs >= min_bufs)) - { - tph = (tpacket3_hdr_t *) (block_start + rx_frame_offset); - - if (num_pkts > 1) - CLIB_PREFETCH (block_start + rx_frame_offset + - tph->tp_next_offset, - 2 * CLIB_CACHE_LINE_BYTES, LOAD); - - vlib_buffer_t *b0 = 0, *first_b0 = 0, *prev_b0 = 0; - vnet_virtio_net_hdr_t *vnet_hdr = 0; - u32 data_len = tph->tp_snaplen; - u32 offset = 0; - u32 bi0 = ~0, first_bi0 = ~0; - u8 l4_hdr_sz = 0; - - if (is_cksum_gso_enabled) - vnet_hdr = - (vnet_virtio_net_hdr_t *) ((u8 *) tph + tph->tp_mac - - sizeof (vnet_virtio_net_hdr_t)); - - // save current state and return - if (PREDICT_FALSE (((data_len / n_buffer_bytes) + 1) > - vec_len (apm->rx_buffers[thread_index]))) - { - rx_queue->rx_frame_offset = rx_frame_offset; - rx_queue->num_rx_pkts = num_pkts; - rx_queue->is_rx_pending = 1; - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - goto done; - } - - while (data_len) - { - /* grab free buffer */ - u32 last_empty_buffer = - vec_len (apm->rx_buffers[thread_index]) - 1; - bi0 = apm->rx_buffers[thread_index][last_empty_buffer]; - vec_set_len (apm->rx_buffers[thread_index], - last_empty_buffer); - n_free_bufs--; - - /* copy data */ - u32 bytes_to_copy = - data_len > n_buffer_bytes ? n_buffer_bytes : data_len; - u32 vlan_len = 0; - u32 bytes_copied = 0; - - b0 = vlib_get_buffer (vm, bi0); - b0->current_data = 0; - - /* Kernel removes VLAN headers, so reconstruct VLAN */ - if (PREDICT_FALSE (tph->tp_status & TP_STATUS_VLAN_VALID)) - { - if (PREDICT_TRUE (offset == 0)) - { - clib_memcpy_fast (vlib_buffer_get_current (b0), - (u8 *) tph + tph->tp_mac, - sizeof (ethernet_header_t)); - ethernet_header_t *eth = - vlib_buffer_get_current (b0); - ethernet_vlan_header_t *vlan = - (ethernet_vlan_header_t *) (eth + 1); - vlan->priority_cfi_and_id = - clib_host_to_net_u16 (tph->hv1.tp_vlan_tci); - vlan->type = eth->type; - eth->type = - clib_host_to_net_u16 (ETHERNET_TYPE_VLAN); - vlan_len = sizeof (ethernet_vlan_header_t); - bytes_copied = sizeof (ethernet_header_t); - } - } - clib_memcpy_fast (((u8 *) vlib_buffer_get_current (b0)) + - bytes_copied + vlan_len, - (u8 *) tph + tph->tp_mac + offset + - bytes_copied, - (bytes_to_copy - bytes_copied)); - - /* fill buffer header */ - b0->current_length = bytes_to_copy + vlan_len; - - if (offset == 0) - { - b0->total_length_not_including_first_buffer = 0; - b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID; - vnet_buffer (b0)->sw_if_index[VLIB_RX] = - apif->sw_if_index; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~0; - first_b0 = b0; - first_bi0 = bi0; - if (is_cksum_gso_enabled) - { - if (vnet_hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) - fill_cksum_offload (first_b0, &l4_hdr_sz, is_ip); - if (vnet_hdr->gso_type & (VIRTIO_NET_HDR_GSO_TCPV4 | - VIRTIO_NET_HDR_GSO_TCPV6)) - fill_gso_offload (first_b0, vnet_hdr->gso_size, - l4_hdr_sz); - } - } - else - buffer_add_to_chain (b0, first_b0, prev_b0, bi0); - - prev_b0 = b0; - offset += bytes_to_copy; - data_len -= bytes_to_copy; - } - n_rx_packets++; - n_rx_bytes += tph->tp_snaplen; - to_next[0] = first_bi0; - to_next += 1; - n_left_to_next--; - - /* drop partial packets */ - if (PREDICT_FALSE (tph->tp_len != tph->tp_snaplen)) - { - next0 = VNET_DEVICE_INPUT_NEXT_DROP; - first_b0->error = - node->errors[AF_PACKET_INPUT_ERROR_PARTIAL_PKT]; - } - else - { - if (PREDICT_FALSE (apif->mode == AF_PACKET_IF_MODE_IP)) - { - switch (first_b0->data[0] & 0xf0) - { - case 0x40: - next0 = VNET_DEVICE_INPUT_NEXT_IP4_INPUT; - break; - case 0x60: - next0 = VNET_DEVICE_INPUT_NEXT_IP6_INPUT; - break; - default: - next0 = VNET_DEVICE_INPUT_NEXT_DROP; - break; - } - if (PREDICT_FALSE (apif->per_interface_next_index != ~0)) - next0 = apif->per_interface_next_index; - } - else - { - /* copy feature arc data from template */ - first_b0->current_config_index = bt.current_config_index; - vnet_buffer (first_b0)->feature_arc_index = - vnet_buffer (&bt)->feature_arc_index; - } - } - - /* trace */ - if (PREDICT_FALSE (n_trace > 0 && - vlib_trace_buffer (vm, node, next0, first_b0, - /* follow_chain */ 0))) - { - af_packet_input_trace_t *tr; - vlib_set_trace_count (vm, node, --n_trace); - tr = vlib_add_trace (vm, node, first_b0, sizeof (*tr)); - tr->is_v3 = 1; - tr->next_index = next0; - tr->hw_if_index = apif->hw_if_index; - tr->queue_id = queue_id; - tr->block = block; - tr->block_start = bd; - tr->pkt_num = bd->hdr.bh1.num_pkts - num_pkts; - clib_memcpy_fast (&tr->bd, bd, sizeof (block_desc_t)); - clib_memcpy_fast (&tr->tph3, tph, sizeof (tpacket3_hdr_t)); - if (is_cksum_gso_enabled) - clib_memcpy_fast (&tr->vnet_hdr, vnet_hdr, - sizeof (vnet_virtio_net_hdr_t)); - else - clib_memset_u8 (&tr->vnet_hdr, 0, - sizeof (vnet_virtio_net_hdr_t)); - } - - /* enque and take next packet */ - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, - n_left_to_next, first_bi0, - next0); - - /* next packet */ - num_pkts--; - rx_frame_offset += tph->tp_next_offset; - } - - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - - if (PREDICT_TRUE (num_pkts == 0)) - { - bd->hdr.bh1.block_status = TP_STATUS_KERNEL; - block = (block + 1) % block_nr; - } - else - { - rx_queue->rx_frame_offset = rx_frame_offset; - rx_queue->num_rx_pkts = num_pkts; - rx_queue->is_rx_pending = 1; - } - } - - rx_queue->next_rx_block = block; - -done: - - if (apm->polling_count == 0) - { - if ((((block_desc_t *) (block_start = rx_queue->rx_ring[block])) - ->hdr.bh1.block_status & - TP_STATUS_USER) != 0) - vlib_node_set_state (vm, node->node_index, VLIB_NODE_STATE_POLLING); - else - vlib_node_set_state (vm, node->node_index, VLIB_NODE_STATE_INTERRUPT); - } - - vlib_error_count (vm, node->node_index, AF_PACKET_INPUT_ERROR_TOTAL_RECV_BLK, - total); - vlib_error_count (vm, node->node_index, AF_PACKET_INPUT_ERROR_TIMEDOUT_BLK, - timedout_blk); - - vlib_increment_combined_counter - (vnet_get_main ()->interface_main.combined_sw_if_counters - + VNET_INTERFACE_COUNTER_RX, - vlib_get_thread_index (), apif->hw_if_index, n_rx_packets, n_rx_bytes); - - vnet_device_increment_rx_packets (thread_index, n_rx_packets); - return n_rx_packets; -} - -always_inline uword -af_packet_v2_device_input_fn (vlib_main_t *vm, vlib_node_runtime_t *node, - vlib_frame_t *frame, af_packet_if_t *apif, - u16 queue_id, u8 is_cksum_gso_enabled) -{ - af_packet_main_t *apm = &af_packet_main; - af_packet_queue_t *rx_queue = vec_elt_at_index (apif->rx_queues, queue_id); - tpacket2_hdr_t *tph; - u32 next_index; - u32 block = 0; - u32 rx_frame; - u32 n_free_bufs; - u32 n_rx_packets = 0; - u32 n_rx_bytes = 0; - u32 *to_next = 0; - u32 frame_size = rx_queue->rx_req->req.tp_frame_size; - u32 frame_num = rx_queue->rx_req->req.tp_frame_nr; - u8 *block_start = rx_queue->rx_ring[block]; - uword n_trace = vlib_get_trace_count (vm, node); - u32 thread_index = vm->thread_index; - u32 n_buffer_bytes = vlib_buffer_get_default_data_size (vm); - u32 min_bufs = rx_queue->rx_req->req.tp_frame_size / n_buffer_bytes; - u8 is_ip = (apif->mode == AF_PACKET_IF_MODE_IP); - vlib_buffer_t bt = {}; - - if (is_ip) - { - next_index = VNET_DEVICE_INPUT_NEXT_IP4_INPUT; - } - else - { - next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT; - if (PREDICT_FALSE (apif->per_interface_next_index != ~0)) - next_index = apif->per_interface_next_index; - - /* redirect if feature path enabled */ - vnet_feature_start_device_input_x1 (apif->sw_if_index, &next_index, &bt); - } - - n_free_bufs = vec_len (apm->rx_buffers[thread_index]); - if (PREDICT_FALSE (n_free_bufs < VLIB_FRAME_SIZE)) - { - vec_validate (apm->rx_buffers[thread_index], - VLIB_FRAME_SIZE + n_free_bufs - 1); - n_free_bufs += vlib_buffer_alloc ( - vm, &apm->rx_buffers[thread_index][n_free_bufs], VLIB_FRAME_SIZE); - vec_set_len (apm->rx_buffers[thread_index], n_free_bufs); - } - - rx_frame = rx_queue->next_rx_frame; - tph = (tpacket2_hdr_t *) (block_start + rx_frame * frame_size); - while ((tph->tp_status & TP_STATUS_USER) && (n_free_bufs > min_bufs)) - { - vlib_buffer_t *b0 = 0, *first_b0 = 0, *prev_b0 = 0; - u32 next0 = next_index; - - u32 n_left_to_next; - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - while ((tph->tp_status & TP_STATUS_USER) && (n_free_bufs > min_bufs) && - n_left_to_next) - { - vnet_virtio_net_hdr_t *vnet_hdr = 0; - u32 data_len = tph->tp_snaplen; - u32 offset = 0; - u32 bi0 = 0, first_bi0 = 0; - u8 l4_hdr_sz = 0; - - if (is_cksum_gso_enabled) - vnet_hdr = - (vnet_virtio_net_hdr_t *) ((u8 *) tph + tph->tp_mac - - sizeof (vnet_virtio_net_hdr_t)); - while (data_len) - { - /* grab free buffer */ - u32 last_empty_buffer = - vec_len (apm->rx_buffers[thread_index]) - 1; - bi0 = apm->rx_buffers[thread_index][last_empty_buffer]; - b0 = vlib_get_buffer (vm, bi0); - vec_set_len (apm->rx_buffers[thread_index], last_empty_buffer); - n_free_bufs--; - - /* copy data */ - u32 bytes_to_copy = - data_len > n_buffer_bytes ? n_buffer_bytes : data_len; - u32 vlan_len = 0; - u32 bytes_copied = 0; - b0->current_data = 0; - /* Kernel removes VLAN headers, so reconstruct VLAN */ - if (PREDICT_FALSE (tph->tp_status & TP_STATUS_VLAN_VALID)) - { - if (PREDICT_TRUE (offset == 0)) - { - clib_memcpy_fast (vlib_buffer_get_current (b0), - (u8 *) tph + tph->tp_mac, - sizeof (ethernet_header_t)); - ethernet_header_t *eth = vlib_buffer_get_current (b0); - ethernet_vlan_header_t *vlan = - (ethernet_vlan_header_t *) (eth + 1); - vlan->priority_cfi_and_id = - clib_host_to_net_u16 (tph->tp_vlan_tci); - vlan->type = eth->type; - eth->type = clib_host_to_net_u16 (ETHERNET_TYPE_VLAN); - vlan_len = sizeof (ethernet_vlan_header_t); - bytes_copied = sizeof (ethernet_header_t); - } - } - clib_memcpy_fast (((u8 *) vlib_buffer_get_current (b0)) + - bytes_copied + vlan_len, - (u8 *) tph + tph->tp_mac + offset + - bytes_copied, - (bytes_to_copy - bytes_copied)); - - /* fill buffer header */ - b0->current_length = bytes_to_copy + vlan_len; - - if (offset == 0) - { - b0->total_length_not_including_first_buffer = 0; - b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID; - vnet_buffer (b0)->sw_if_index[VLIB_RX] = apif->sw_if_index; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~0; - first_bi0 = bi0; - first_b0 = vlib_get_buffer (vm, first_bi0); - - if (is_cksum_gso_enabled) - { - if (vnet_hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) - fill_cksum_offload (first_b0, &l4_hdr_sz, is_ip); - if (vnet_hdr->gso_type & (VIRTIO_NET_HDR_GSO_TCPV4 | - VIRTIO_NET_HDR_GSO_TCPV6)) - fill_gso_offload (first_b0, vnet_hdr->gso_size, - l4_hdr_sz); - } - } - else - buffer_add_to_chain (b0, first_b0, prev_b0, bi0); - - prev_b0 = b0; - offset += bytes_to_copy; - data_len -= bytes_to_copy; - } - n_rx_packets++; - n_rx_bytes += tph->tp_snaplen; - to_next[0] = first_bi0; - to_next += 1; - n_left_to_next--; - - /* drop partial packets */ - if (PREDICT_FALSE (tph->tp_len != tph->tp_snaplen)) - { - next0 = VNET_DEVICE_INPUT_NEXT_DROP; - first_b0->error = - node->errors[AF_PACKET_INPUT_ERROR_PARTIAL_PKT]; - } - else - { - if (PREDICT_FALSE (is_ip)) - { - switch (first_b0->data[0] & 0xf0) - { - case 0x40: - next0 = VNET_DEVICE_INPUT_NEXT_IP4_INPUT; - break; - case 0x60: - next0 = VNET_DEVICE_INPUT_NEXT_IP6_INPUT; - break; - default: - next0 = VNET_DEVICE_INPUT_NEXT_DROP; - break; - } - if (PREDICT_FALSE (apif->per_interface_next_index != ~0)) - next0 = apif->per_interface_next_index; - } - else - { - /* copy feature arc data from template */ - first_b0->current_config_index = bt.current_config_index; - vnet_buffer (first_b0)->feature_arc_index = - vnet_buffer (&bt)->feature_arc_index; - } - } - - /* trace */ - if (PREDICT_FALSE (n_trace > 0 && - vlib_trace_buffer (vm, node, next0, first_b0, - /* follow_chain */ 0))) - { - af_packet_input_trace_t *tr; - vlib_set_trace_count (vm, node, --n_trace); - tr = vlib_add_trace (vm, node, first_b0, sizeof (*tr)); - tr->is_v3 = 0; - tr->next_index = next0; - tr->hw_if_index = apif->hw_if_index; - tr->queue_id = queue_id; - clib_memcpy_fast (&tr->tph2, tph, sizeof (struct tpacket2_hdr)); - if (is_cksum_gso_enabled) - clib_memcpy_fast (&tr->vnet_hdr, vnet_hdr, - sizeof (vnet_virtio_net_hdr_t)); - else - clib_memset_u8 (&tr->vnet_hdr, 0, - sizeof (vnet_virtio_net_hdr_t)); - } - - /* enque and take next packet */ - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, - n_left_to_next, first_bi0, next0); - - /* next packet */ - tph->tp_status = TP_STATUS_KERNEL; - rx_frame = (rx_frame + 1) % frame_num; - tph = (struct tpacket2_hdr *) (block_start + rx_frame * frame_size); - } - - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - - rx_queue->next_rx_frame = rx_frame; - - vlib_increment_combined_counter ( - vnet_get_main ()->interface_main.combined_sw_if_counters + - VNET_INTERFACE_COUNTER_RX, - vlib_get_thread_index (), apif->hw_if_index, n_rx_packets, n_rx_bytes); - - vnet_device_increment_rx_packets (thread_index, n_rx_packets); - return n_rx_packets; -} - -always_inline uword -af_packet_device_input_fn (vlib_main_t *vm, vlib_node_runtime_t *node, - vlib_frame_t *frame, af_packet_if_t *apif, - u16 queue_id, u8 is_cksum_gso_enabled) - -{ - if (apif->version == TPACKET_V3) - return af_packet_v3_device_input_fn (vm, node, frame, apif, queue_id, - is_cksum_gso_enabled); - else - return af_packet_v2_device_input_fn (vm, node, frame, apif, queue_id, - is_cksum_gso_enabled); -} - -VLIB_NODE_FN (af_packet_input_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - u32 n_rx_packets = 0; - af_packet_main_t *apm = &af_packet_main; - vnet_hw_if_rxq_poll_vector_t *pv; - pv = vnet_hw_if_get_rxq_poll_vector (vm, node); - for (int i = 0; i < vec_len (pv); i++) - { - af_packet_if_t *apif; - apif = vec_elt_at_index (apm->interfaces, pv[i].dev_instance); - if (apif->is_admin_up) - { - if (apif->is_cksum_gso_enabled) - n_rx_packets += af_packet_device_input_fn (vm, node, frame, apif, - pv[i].queue_id, 1); - else - n_rx_packets += af_packet_device_input_fn (vm, node, frame, apif, - pv[i].queue_id, 0); - } - } - return n_rx_packets; -} - -VLIB_REGISTER_NODE (af_packet_input_node) = { - .name = "af-packet-input", - .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED, - .sibling_of = "device-input", - .format_trace = format_af_packet_input_trace, - .type = VLIB_NODE_TYPE_INPUT, - .state = VLIB_NODE_STATE_INTERRUPT, - .n_errors = AF_PACKET_INPUT_N_ERROR, - .error_strings = af_packet_input_error_strings, -}; - - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |