diff options
Diffstat (limited to 'src/vnet/devices/af_packet/device.c')
| -rw-r--r-- | src/vnet/devices/af_packet/device.c | 836 |
1 files changed, 0 insertions, 836 deletions
diff --git a/src/vnet/devices/af_packet/device.c b/src/vnet/devices/af_packet/device.c deleted file mode 100644 index 17291f76b71..00000000000 --- a/src/vnet/devices/af_packet/device.c +++ /dev/null @@ -1,836 +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 <sys/socket.h> -#include <sys/ioctl.h> -#include <net/if.h> -#include <net/if_arp.h> - -#include <vlib/vlib.h> -#include <vlib/unix/unix.h> -#include <vnet/ip/ip.h> -#include <vnet/ethernet/ethernet.h> -#include <vnet/ip/ip4_packet.h> -#include <vnet/ip/ip6_packet.h> -#include <vnet/ip/ip_psh_cksum.h> -#include <vnet/tcp/tcp_packet.h> -#include <vnet/udp/udp_packet.h> - -#include <vnet/devices/af_packet/af_packet.h> -#include <vnet/devices/virtio/virtio_std.h> - -#define foreach_af_packet_tx_func_error \ -_(FRAME_NOT_READY, "tx frame not ready") \ -_(TXRING_EAGAIN, "tx sendto temporary failure") \ -_(TXRING_FATAL, "tx sendto fatal failure") \ -_(TXRING_OVERRUN, "tx ring overrun") - -typedef enum -{ -#define _(f,s) AF_PACKET_TX_ERROR_##f, - foreach_af_packet_tx_func_error -#undef _ - AF_PACKET_TX_N_ERROR, -} af_packet_tx_func_error_t; - -static char *af_packet_tx_func_error_strings[] = { -#define _(n,s) s, - foreach_af_packet_tx_func_error -#undef _ -}; - -typedef struct -{ - u32 buffer_index; - u32 hw_if_index; - u16 queue_id; - u8 is_v2; - union - { - tpacket2_hdr_t tph2; - tpacket3_hdr_t tph3; - }; - vnet_virtio_net_hdr_t vnet_hdr; - vlib_buffer_t buffer; -} af_packet_tx_trace_t; - -#ifndef CLIB_MARCH_VARIANT -u8 * -format_af_packet_device_name (u8 * s, va_list * args) -{ - u32 i = va_arg (*args, u32); - af_packet_main_t *apm = &af_packet_main; - af_packet_if_t *apif = pool_elt_at_index (apm->interfaces, i); - - s = format (s, "host-%s", apif->host_if_name); - return s; -} -#endif /* CLIB_MARCH_VARIANT */ - -static u8 * -format_af_packet_device (u8 * s, va_list * args) -{ - u32 dev_instance = va_arg (*args, u32); - u32 indent = format_get_indent (s); - int __clib_unused verbose = va_arg (*args, int); - - af_packet_main_t *apm = &af_packet_main; - af_packet_if_t *apif = pool_elt_at_index (apm->interfaces, dev_instance); - af_packet_queue_t *rx_queue = 0; - af_packet_queue_t *tx_queue = 0; - - s = format (s, "Linux PACKET socket interface %s", - (apif->version == TPACKET_V2) ? "v2" : "v3"); - s = format (s, "\n%UFEATURES:", format_white_space, indent); - if (apif->is_qdisc_bypass_enabled) - s = format (s, "\n%Uqdisc-bpass-enabled", format_white_space, indent + 2); - if (apif->is_cksum_gso_enabled) - s = format (s, "\n%Ucksum-gso-enabled", format_white_space, indent + 2); - if (apif->is_fanout_enabled) - s = format (s, "\n%Ufanout-enabled", format_white_space, indent + 2); - - vec_foreach (rx_queue, apif->rx_queues) - { - u32 rx_block_size = rx_queue->rx_req->req.tp_block_size; - u32 rx_frame_size = rx_queue->rx_req->req.tp_frame_size; - u32 rx_frame_nr = rx_queue->rx_req->req.tp_frame_nr; - u32 rx_block_nr = rx_queue->rx_req->req.tp_block_nr; - - s = format (s, "\n%URX Queue %u:", format_white_space, indent, - rx_queue->queue_id); - s = format (s, "\n%Ublock size:%d nr:%d frame size:%d nr:%d", - format_white_space, indent + 2, rx_block_size, rx_block_nr, - rx_frame_size, rx_frame_nr); - if (apif->version == TPACKET_V2) - s = format (s, " next frame:%d", rx_queue->next_rx_frame); - else - s = format (s, " next block:%d", rx_queue->next_rx_block); - if (rx_queue->is_rx_pending) - { - s = format ( - s, "\n%UPending Request: num-rx-pkts:%d next-frame-offset:%d", - format_white_space, indent + 2, rx_queue->num_rx_pkts, - rx_queue->rx_frame_offset); - } - } - - vec_foreach (tx_queue, apif->tx_queues) - { - clib_spinlock_lock (&tx_queue->lockp); - u32 tx_block_sz = tx_queue->tx_req->req.tp_block_size; - u32 tx_frame_sz = tx_queue->tx_req->req.tp_frame_size; - u32 tx_frame_nr = tx_queue->tx_req->req.tp_frame_nr; - u32 tx_block_nr = tx_queue->tx_req->req.tp_block_nr; - int block = 0; - int n_send_req = 0, n_avail = 0, n_sending = 0, n_tot = 0, n_wrong = 0; - u8 *tx_block_start = tx_queue->tx_ring[block]; - u32 tx_frame = tx_queue->next_tx_frame; - tpacket3_hdr_t *tph3; - tpacket2_hdr_t *tph2; - - s = format (s, "\n%UTX Queue %u:", format_white_space, indent, - tx_queue->queue_id); - s = format (s, "\n%Ublock size:%d nr:%d frame size:%d nr:%d", - format_white_space, indent + 2, tx_block_sz, tx_block_nr, - tx_frame_sz, tx_frame_nr); - s = format (s, " next frame:%d", tx_queue->next_tx_frame); - if (apif->version & TPACKET_V3) - do - { - tph3 = - (tpacket3_hdr_t *) (tx_block_start + tx_frame * tx_frame_sz); - tx_frame = (tx_frame + 1) % tx_frame_nr; - if (tph3->tp_status == 0) - n_avail++; - else if (tph3->tp_status & TP_STATUS_SEND_REQUEST) - n_send_req++; - else if (tph3->tp_status & TP_STATUS_SENDING) - n_sending++; - else - n_wrong++; - n_tot++; - } - while (tx_frame != tx_queue->next_tx_frame); - else - do - { - tph2 = - (tpacket2_hdr_t *) (tx_block_start + tx_frame * tx_frame_sz); - tx_frame = (tx_frame + 1) % tx_frame_nr; - if (tph2->tp_status == 0) - n_avail++; - else if (tph2->tp_status & TP_STATUS_SEND_REQUEST) - n_send_req++; - else if (tph2->tp_status & TP_STATUS_SENDING) - n_sending++; - else - n_wrong++; - n_tot++; - } - while (tx_frame != tx_queue->next_tx_frame); - s = - format (s, "\n%Uavailable:%d request:%d sending:%d wrong:%d total:%d", - format_white_space, indent + 2, n_avail, n_send_req, n_sending, - n_wrong, n_tot); - clib_spinlock_unlock (&tx_queue->lockp); - } - return s; -} - -static u8 * -format_af_packet_tx_trace (u8 *s, va_list *va) -{ - CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *); - CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *); - af_packet_tx_trace_t *t = va_arg (*va, af_packet_tx_trace_t *); - u32 indent = format_get_indent (s); - - s = format (s, "af_packet: hw_if_index %u tx-queue %u", t->hw_if_index, - t->queue_id); - - if (t->is_v2) - { - 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 - ); - } - else - { - 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 - ); - } - 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); - - s = format (s, "\n%Ubuffer 0x%x:\n%U%U", format_white_space, indent + 2, - t->buffer_index, format_white_space, indent + 4, - format_vnet_buffer_no_chain, &t->buffer); - s = format (s, "\n%U%U", format_white_space, indent + 2, - format_ethernet_header_with_length, t->buffer.pre_data, - sizeof (t->buffer.pre_data)); - return s; -} - -static void -af_packet_tx_trace (vlib_main_t *vm, vlib_node_runtime_t *node, - vlib_buffer_t *b0, u32 bi, void *tph, - vnet_virtio_net_hdr_t *vnet_hdr, u32 hw_if_index, - u16 queue_id, u8 is_v2) -{ - af_packet_tx_trace_t *t; - t = vlib_add_trace (vm, node, b0, sizeof (t[0])); - t->hw_if_index = hw_if_index; - t->queue_id = queue_id; - t->buffer_index = bi; - t->is_v2 = is_v2; - - if (is_v2) - clib_memcpy_fast (&t->tph2, (tpacket2_hdr_t *) tph, - sizeof (tpacket2_hdr_t)); - else - clib_memcpy_fast (&t->tph3, (tpacket3_hdr_t *) tph, - sizeof (tpacket3_hdr_t)); - clib_memcpy_fast (&t->vnet_hdr, vnet_hdr, sizeof (*vnet_hdr)); - clib_memcpy_fast (&t->buffer, b0, sizeof (*b0) - sizeof (b0->pre_data)); - clib_memcpy_fast (t->buffer.pre_data, vlib_buffer_get_current (b0), - sizeof (t->buffer.pre_data)); -} - -static_always_inline void -fill_gso_offload (vlib_buffer_t *b0, vnet_virtio_net_hdr_t *vnet_hdr) -{ - vnet_buffer_oflags_t oflags = vnet_buffer (b0)->oflags; - i16 l4_hdr_offset = vnet_buffer (b0)->l4_hdr_offset - b0->current_data; - if (b0->flags & VNET_BUFFER_F_IS_IP4) - { - ip4_header_t *ip4; - vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4; - vnet_hdr->gso_size = vnet_buffer2 (b0)->gso_size; - vnet_hdr->hdr_len = l4_hdr_offset + vnet_buffer2 (b0)->gso_l4_hdr_sz; - vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; - vnet_hdr->csum_start = l4_hdr_offset; // 0x22; - vnet_hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum); - ip4 = (ip4_header_t *) (b0->data + vnet_buffer (b0)->l3_hdr_offset); - if (oflags & VNET_BUFFER_OFFLOAD_F_IP_CKSUM) - ip4->checksum = ip4_header_checksum (ip4); - tcp_header_t *tcp = - (tcp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset); - tcp->checksum = ip4_pseudo_header_cksum (ip4); - } - else if (b0->flags & VNET_BUFFER_F_IS_IP6) - { - ip6_header_t *ip6; - vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6; - vnet_hdr->gso_size = vnet_buffer2 (b0)->gso_size; - vnet_hdr->hdr_len = l4_hdr_offset + vnet_buffer2 (b0)->gso_l4_hdr_sz; - vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; - vnet_hdr->csum_start = l4_hdr_offset; // 0x36; - vnet_hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum); - ip6 = (ip6_header_t *) (b0->data + vnet_buffer (b0)->l3_hdr_offset); - tcp_header_t *tcp = - (tcp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset); - tcp->checksum = ip6_pseudo_header_cksum (ip6); - } -} - -static_always_inline void -fill_cksum_offload (vlib_buffer_t *b0, vnet_virtio_net_hdr_t *vnet_hdr) -{ - vnet_buffer_oflags_t oflags = vnet_buffer (b0)->oflags; - i16 l4_hdr_offset = vnet_buffer (b0)->l4_hdr_offset - b0->current_data; - if (b0->flags & VNET_BUFFER_F_IS_IP4) - { - ip4_header_t *ip4; - ip4 = (ip4_header_t *) (b0->data + vnet_buffer (b0)->l3_hdr_offset); - if (oflags & VNET_BUFFER_OFFLOAD_F_IP_CKSUM) - ip4->checksum = ip4_header_checksum (ip4); - vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; - vnet_hdr->csum_start = l4_hdr_offset; - if (oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM) - { - tcp_header_t *tcp = - (tcp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset); - tcp->checksum = ip4_pseudo_header_cksum (ip4); - vnet_hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum); - } - else if (oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM) - { - udp_header_t *udp = - (udp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset); - udp->checksum = ip4_pseudo_header_cksum (ip4); - vnet_hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum); - } - } - else if (b0->flags & VNET_BUFFER_F_IS_IP6) - { - ip6_header_t *ip6; - vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; - vnet_hdr->csum_start = l4_hdr_offset; - ip6 = (ip6_header_t *) (b0->data + vnet_buffer (b0)->l3_hdr_offset); - if (oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM) - { - tcp_header_t *tcp = - (tcp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset); - tcp->checksum = ip6_pseudo_header_cksum (ip6); - vnet_hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum); - } - else if (oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM) - { - udp_header_t *udp = - (udp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset); - udp->checksum = ip6_pseudo_header_cksum (ip6); - vnet_hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum); - } - } -} - -VNET_DEVICE_CLASS_TX_FN (af_packet_device_class) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - af_packet_main_t *apm = &af_packet_main; - vnet_hw_if_tx_frame_t *tf = vlib_frame_scalar_args (frame); - u32 *buffers = vlib_frame_vector_args (frame); - u32 n_left = frame->n_vectors; - u32 n_sent = 0; - vnet_interface_output_runtime_t *rd = (void *) node->runtime_data; - af_packet_if_t *apif = - pool_elt_at_index (apm->interfaces, rd->dev_instance); - u16 queue_id = tf->queue_id; - af_packet_queue_t *tx_queue = vec_elt_at_index (apif->tx_queues, queue_id); - u32 block = 0, frame_size = 0, frame_num = 0, tx_frame = 0; - u8 *block_start = 0; - tpacket3_hdr_t *tph3 = 0; - tpacket2_hdr_t *tph2 = 0; - u32 frame_not_ready = 0; - u8 is_cksum_gso_enabled = (apif->is_cksum_gso_enabled == 1) ? 1 : 0; - u32 tpacket_align = 0; - u8 is_v2 = (apif->version == TPACKET_V2) ? 1 : 0; - - if (tf->shared_queue) - clib_spinlock_lock (&tx_queue->lockp); - - frame_size = tx_queue->tx_req->req.tp_frame_size; - frame_num = tx_queue->tx_req->req.tp_frame_nr; - block_start = tx_queue->tx_ring[block]; - tx_frame = tx_queue->next_tx_frame; - if (is_v2) - { - tpacket_align = TPACKET_ALIGN (sizeof (tpacket2_hdr_t)); - while (n_left) - { - u32 len; - vnet_virtio_net_hdr_t *vnet_hdr = 0; - u32 offset = 0; - vlib_buffer_t *b0 = 0, *b0_first = 0; - u32 bi, bi_first; - - bi = bi_first = buffers[0]; - n_left--; - buffers++; - - tph2 = (tpacket2_hdr_t *) (block_start + tx_frame * frame_size); - if (PREDICT_FALSE (tph2->tp_status & - (TP_STATUS_SEND_REQUEST | TP_STATUS_SENDING))) - { - frame_not_ready++; - goto nextv2; - } - - b0_first = b0 = vlib_get_buffer (vm, bi); - - if (PREDICT_TRUE (is_cksum_gso_enabled)) - { - vnet_hdr = - (vnet_virtio_net_hdr_t *) ((u8 *) tph2 + tpacket_align); - - clib_memset_u8 (vnet_hdr, 0, sizeof (vnet_virtio_net_hdr_t)); - offset = sizeof (vnet_virtio_net_hdr_t); - - if (b0->flags & VNET_BUFFER_F_GSO) - fill_gso_offload (b0, vnet_hdr); - else if (b0->flags & VNET_BUFFER_F_OFFLOAD) - fill_cksum_offload (b0, vnet_hdr); - } - - len = b0->current_length; - clib_memcpy_fast ((u8 *) tph2 + tpacket_align + offset, - vlib_buffer_get_current (b0), len); - offset += len; - - while (b0->flags & VLIB_BUFFER_NEXT_PRESENT) - { - b0 = vlib_get_buffer (vm, b0->next_buffer); - len = b0->current_length; - clib_memcpy_fast ((u8 *) tph2 + tpacket_align + offset, - vlib_buffer_get_current (b0), len); - offset += len; - } - - tph2->tp_len = tph2->tp_snaplen = offset; - tph2->tp_status = TP_STATUS_SEND_REQUEST; - n_sent++; - - if (PREDICT_FALSE (b0_first->flags & VLIB_BUFFER_IS_TRACED)) - { - if (PREDICT_TRUE (is_cksum_gso_enabled)) - af_packet_tx_trace (vm, node, b0_first, bi_first, tph2, - vnet_hdr, apif->hw_if_index, queue_id, 1); - else - { - vnet_virtio_net_hdr_t vnet_hdr2 = {}; - af_packet_tx_trace (vm, node, b0_first, bi_first, tph2, - &vnet_hdr2, apif->hw_if_index, queue_id, - 1); - } - } - tx_frame = (tx_frame + 1) % frame_num; - - nextv2: - /* check if we've exhausted the ring */ - if (PREDICT_FALSE (frame_not_ready + n_sent == frame_num)) - break; - } - } - else - { - tpacket_align = TPACKET_ALIGN (sizeof (tpacket3_hdr_t)); - - while (n_left) - { - u32 len; - vnet_virtio_net_hdr_t *vnet_hdr = 0; - u32 offset = 0; - vlib_buffer_t *b0 = 0, *b0_first = 0; - u32 bi, bi_first; - - bi = bi_first = buffers[0]; - n_left--; - buffers++; - - tph3 = (tpacket3_hdr_t *) (block_start + tx_frame * frame_size); - if (PREDICT_FALSE (tph3->tp_status & - (TP_STATUS_SEND_REQUEST | TP_STATUS_SENDING))) - { - frame_not_ready++; - goto nextv3; - } - - b0_first = b0 = vlib_get_buffer (vm, bi); - - if (PREDICT_TRUE (is_cksum_gso_enabled)) - { - vnet_hdr = - (vnet_virtio_net_hdr_t *) ((u8 *) tph3 + tpacket_align); - - clib_memset_u8 (vnet_hdr, 0, sizeof (vnet_virtio_net_hdr_t)); - offset = sizeof (vnet_virtio_net_hdr_t); - - if (b0->flags & VNET_BUFFER_F_GSO) - fill_gso_offload (b0, vnet_hdr); - else if (b0->flags & VNET_BUFFER_F_OFFLOAD) - fill_cksum_offload (b0, vnet_hdr); - } - - len = b0->current_length; - clib_memcpy_fast ((u8 *) tph3 + tpacket_align + offset, - vlib_buffer_get_current (b0), len); - offset += len; - - while (b0->flags & VLIB_BUFFER_NEXT_PRESENT) - { - b0 = vlib_get_buffer (vm, b0->next_buffer); - len = b0->current_length; - clib_memcpy_fast ((u8 *) tph3 + tpacket_align + offset, - vlib_buffer_get_current (b0), len); - offset += len; - } - - tph3->tp_len = tph3->tp_snaplen = offset; - tph3->tp_status = TP_STATUS_SEND_REQUEST; - n_sent++; - - if (PREDICT_FALSE (b0_first->flags & VLIB_BUFFER_IS_TRACED)) - { - if (PREDICT_TRUE (is_cksum_gso_enabled)) - af_packet_tx_trace (vm, node, b0_first, bi_first, tph3, - vnet_hdr, apif->hw_if_index, queue_id, 0); - else - { - vnet_virtio_net_hdr_t vnet_hdr2 = {}; - af_packet_tx_trace (vm, node, b0_first, bi_first, tph3, - &vnet_hdr2, apif->hw_if_index, queue_id, - 0); - } - } - tx_frame = (tx_frame + 1) % frame_num; - - nextv3: - /* check if we've exhausted the ring */ - if (PREDICT_FALSE (frame_not_ready + n_sent == frame_num)) - break; - } - } - CLIB_MEMORY_BARRIER (); - - if (PREDICT_TRUE (n_sent || tx_queue->is_tx_pending)) - { - tx_queue->next_tx_frame = tx_frame; - tx_queue->is_tx_pending = 0; - - if (PREDICT_FALSE ( - sendto (tx_queue->fd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1)) - { - /* Uh-oh, drop & move on, but count whether it was fatal or not. - * Note that we have no reliable way to properly determine the - * disposition of the packets we just enqueued for delivery. - */ - uword counter; - - if (unix_error_is_fatal (errno)) - { - counter = AF_PACKET_TX_ERROR_TXRING_FATAL; - } - else - { - counter = AF_PACKET_TX_ERROR_TXRING_EAGAIN; - /* non-fatal error: kick again next time - * note that you could still end up in a deadlock: if you do not - * try to send new packets (ie reschedule this tx node), eg. - * because your peer is waiting for the unsent packets to reply - * to you but your waiting for its reply etc., you are not going - * to kick again, and everybody is waiting for the other to talk - * 1st... */ - tx_queue->is_tx_pending = 1; - } - - vlib_error_count (vm, node->node_index, counter, 1); - } - } - - if (tf->shared_queue) - clib_spinlock_unlock (&tx_queue->lockp); - - if (PREDICT_FALSE (frame_not_ready)) - vlib_error_count (vm, node->node_index, - AF_PACKET_TX_ERROR_FRAME_NOT_READY, frame_not_ready); - - if (PREDICT_FALSE (frame_not_ready + n_sent == frame_num)) - vlib_error_count (vm, node->node_index, AF_PACKET_TX_ERROR_TXRING_OVERRUN, - n_left); - - vlib_buffer_free (vm, vlib_frame_vector_args (frame), frame->n_vectors); - return frame->n_vectors; -} - -static void -af_packet_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index, - u32 node_index) -{ - af_packet_main_t *apm = &af_packet_main; - vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index); - af_packet_if_t *apif = - pool_elt_at_index (apm->interfaces, hw->dev_instance); - - /* Shut off redirection */ - if (node_index == ~0) - { - apif->per_interface_next_index = node_index; - return; - } - - apif->per_interface_next_index = - vlib_node_add_next (vlib_get_main (), af_packet_input_node.index, - node_index); -} - -static void -af_packet_clear_hw_interface_counters (u32 instance) -{ - /* Nothing for now */ -} - -static clib_error_t * -af_packet_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, - u32 flags) -{ - af_packet_main_t *apm = &af_packet_main; - vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index); - af_packet_if_t *apif = - pool_elt_at_index (apm->interfaces, hw->dev_instance); - u32 hw_flags; - int rv, fd = socket (AF_UNIX, SOCK_DGRAM, 0); - struct ifreq ifr; - - if (0 > fd) - { - vlib_log_warn (apm->log_class, "af_packet_%s could not open socket", - apif->host_if_name); - return 0; - } - - /* if interface is a bridge ignore */ - if (apif->host_if_index < 0) - goto error; /* no error */ - - /* use host_if_index in case host name has changed */ - ifr.ifr_ifindex = apif->host_if_index; - if ((rv = ioctl (fd, SIOCGIFNAME, &ifr)) < 0) - { - vlib_log_warn (apm->log_class, - "af_packet_%s ioctl could not retrieve eth name", - apif->host_if_name); - goto error; - } - - apif->is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0; - - if ((rv = ioctl (fd, SIOCGIFFLAGS, &ifr)) < 0) - { - vlib_log_warn (apm->log_class, "af_packet_%s error: %d", - apif->is_admin_up ? "up" : "down", rv); - goto error; - } - - if (apif->is_admin_up) - { - hw_flags = VNET_HW_INTERFACE_FLAG_LINK_UP; - ifr.ifr_flags |= IFF_UP; - } - else - { - hw_flags = 0; - ifr.ifr_flags &= ~IFF_UP; - } - - if ((rv = ioctl (fd, SIOCSIFFLAGS, &ifr)) < 0) - { - vlib_log_warn (apm->log_class, "af_packet_%s error: %d", - apif->is_admin_up ? "up" : "down", rv); - goto error; - } - - vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags); - -error: - if (0 <= fd) - close (fd); - - return 0; /* no error */ -} - -static clib_error_t * -af_packet_subif_add_del_function (vnet_main_t * vnm, - u32 hw_if_index, - struct vnet_sw_interface_t *st, int is_add) -{ - /* Nothing for now */ - return 0; -} - -static clib_error_t *af_packet_set_mac_address_function - (struct vnet_hw_interface_t *hi, const u8 * old_address, const u8 * address) -{ - af_packet_main_t *apm = &af_packet_main; - af_packet_if_t *apif = - pool_elt_at_index (apm->interfaces, hi->dev_instance); - int rv, fd; - struct ifreq ifr; - - if (apif->mode == AF_PACKET_IF_MODE_IP) - { - vlib_log_warn (apm->log_class, "af_packet_%s interface is in IP mode", - apif->host_if_name); - return clib_error_return (0, - " MAC update failed, interface is in IP mode"); - } - - fd = socket (AF_UNIX, SOCK_DGRAM, 0); - if (0 > fd) - { - vlib_log_warn (apm->log_class, "af_packet_%s could not open socket", - apif->host_if_name); - return 0; - } - - /* if interface is a bridge ignore */ - if (apif->host_if_index < 0) - goto error; /* no error */ - - /* use host_if_index in case host name has changed */ - ifr.ifr_ifindex = apif->host_if_index; - if ((rv = ioctl (fd, SIOCGIFNAME, &ifr)) < 0) - { - vlib_log_warn - (apm->log_class, - "af_packet_%s ioctl could not retrieve eth name, error: %d", - apif->host_if_name, rv); - goto error; - } - - clib_memcpy (ifr.ifr_hwaddr.sa_data, address, 6); - ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER; - - if ((rv = ioctl (fd, SIOCSIFHWADDR, &ifr)) < 0) - { - vlib_log_warn (apm->log_class, - "af_packet_%s ioctl could not set mac, error: %d", - apif->host_if_name, rv); - goto error; - } - -error: - - if (0 <= fd) - close (fd); - - return 0; /* no error */ -} - -static clib_error_t * -af_packet_interface_rx_mode_change (vnet_main_t *vnm, u32 hw_if_index, u32 qid, - vnet_hw_if_rx_mode mode) -{ - af_packet_main_t *apm = &af_packet_main; - vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index); - af_packet_if_t *apif; - - apif = vec_elt_at_index (apm->interfaces, hw->dev_instance); - - if (mode == VNET_HW_IF_RX_MODE_ADAPTIVE) - { - vlib_log_err (apm->log_class, - "af_packet_%s adaptive mode is not supported", - apif->host_if_name); - return clib_error_return ( - 0, "af_packet_%s adaptive mode is not supported", apif->host_if_name); - } - - af_packet_queue_t *rx_queue = vec_elt_at_index (apif->rx_queues, qid); - - if (rx_queue->mode != mode) - { - rx_queue->mode = mode; - - if (mode == VNET_HW_IF_RX_MODE_POLLING) - apm->polling_count++; - else if (mode == VNET_HW_IF_RX_MODE_INTERRUPT && apm->polling_count > 0) - apm->polling_count--; - } - - return 0; -} - -VNET_DEVICE_CLASS (af_packet_device_class) = { - .name = "af-packet", - .format_device_name = format_af_packet_device_name, - .format_device = format_af_packet_device, - .format_tx_trace = format_af_packet_tx_trace, - .tx_function_n_errors = AF_PACKET_TX_N_ERROR, - .tx_function_error_strings = af_packet_tx_func_error_strings, - .rx_redirect_to_node = af_packet_set_interface_next_node, - .clear_counters = af_packet_clear_hw_interface_counters, - .admin_up_down_function = af_packet_interface_admin_up_down, - .subif_add_del_function = af_packet_subif_add_del_function, - .mac_addr_change_function = af_packet_set_mac_address_function, - .rx_mode_change_function = af_packet_interface_rx_mode_change, -}; - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |