-/*
- *------------------------------------------------------------------
+/*------------------------------------------------------------------
* af_packet.c - linux kernel packet interface
*
* Copyright (c) 2016 Cisco and/or its affiliates.
*/
#include <linux/if_packet.h>
+#include <linux/virtio_net.h>
#include <vlib/vlib.h>
#include <vlib/unix/unix.h>
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 *);
- uword indent = format_get_indent (s);
+ u32 indent = format_get_indent (s);
s = format (s, "af_packet: hw_if_index %d next-index %d",
t->hw_if_index, t->next_index);
u32 frame_num = apif->rx_req->tp_frame_nr;
u8 *block_start = apif->rx_ring + block * block_size;
uword n_trace = vlib_get_trace_count (vm, node);
- u32 cpu_index = os_get_cpu_number ();
+ u32 thread_index = vlib_get_thread_index ();
u32 n_buffer_bytes = vlib_buffer_free_list_buffer_size (vm,
VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
u32 min_bufs = apif->rx_req->tp_frame_size / n_buffer_bytes;
if (apif->per_interface_next_index != ~0)
next_index = apif->per_interface_next_index;
- n_free_bufs = vec_len (apm->rx_buffers[cpu_index]);
+ n_free_bufs = vec_len (apm->rx_buffers[thread_index]);
if (PREDICT_FALSE (n_free_bufs < VLIB_FRAME_SIZE))
{
- vec_validate (apm->rx_buffers[cpu_index],
+ vec_validate (apm->rx_buffers[thread_index],
VLIB_FRAME_SIZE + n_free_bufs - 1);
n_free_bufs +=
- vlib_buffer_alloc (vm, &apm->rx_buffers[cpu_index][n_free_bufs],
+ vlib_buffer_alloc (vm, &apm->rx_buffers[thread_index][n_free_bufs],
VLIB_FRAME_SIZE);
- _vec_len (apm->rx_buffers[cpu_index]) = n_free_bufs;
+ _vec_len (apm->rx_buffers[thread_index]) = n_free_bufs;
}
rx_frame = apif->next_rx_frame;
while ((tph->tp_status & TP_STATUS_USER) && (n_free_bufs > min_bufs) &&
n_left_to_next)
{
+
+ struct virtio_net_hdr *vh =
+ (struct virtio_net_hdr *) (((u8 *) tph) + tph->tp_mac -
+ sizeof (struct virtio_net_hdr));
u32 data_len = tph->tp_snaplen;
u32 offset = 0;
u32 bi0 = 0, first_bi0 = 0, prev_bi0;
+ u32 vlan_len = 0;
+ ip_csum_t wsum = 0;
+ u16 *wsum_addr = NULL;
+ u32 do_vnet = apm->flags & AF_PACKET_USES_VNET_HEADERS;
+ u32 do_csum = tph->tp_status & TP_STATUS_CSUMNOTREADY;
while (data_len)
{
/* grab free buffer */
u32 last_empty_buffer =
- vec_len (apm->rx_buffers[cpu_index]) - 1;
+ vec_len (apm->rx_buffers[thread_index]) - 1;
prev_bi0 = bi0;
- bi0 = apm->rx_buffers[cpu_index][last_empty_buffer];
+ bi0 = apm->rx_buffers[thread_index][last_empty_buffer];
b0 = vlib_get_buffer (vm, bi0);
- _vec_len (apm->rx_buffers[cpu_index]) = last_empty_buffer;
+ _vec_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 bytes_copied = 0;
b0->current_data = 0;
- clib_memcpy (vlib_buffer_get_current (b0),
- (u8 *) tph + tph->tp_mac + offset, bytes_to_copy);
+ /* Kernel removes VLAN headers, so reconstruct VLAN */
+ if (PREDICT_FALSE (tph->tp_status & TP_STATUS_VLAN_VALID))
+ {
+ if (PREDICT_TRUE (offset == 0))
+ {
+ clib_memcpy (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);
+ }
+ }
+ /* Check if the incoming skb is marked as CSUM_PARTIAL,
+ * If VNET Headers are enabled TP_STATUS_CSUMNOTREADY is
+ * equivalent to the vnet csum flag.
+ **/
+ if (PREDICT_TRUE ((do_vnet != 0) && (do_csum != 0)))
+ {
+ wsum_addr = (u16 *) (((u8 *) vlib_buffer_get_current (b0)) +
+ vlan_len + vh->csum_start +
+ vh->csum_offset);
+ if (bytes_copied <= vh->csum_start)
+ {
+ clib_memcpy (((u8 *) vlib_buffer_get_current (b0)) +
+ bytes_copied + vlan_len,
+ (u8 *) tph + tph->tp_mac + offset +
+ bytes_copied,
+ (vh->csum_start - bytes_copied));
+ wsum =
+ ip_csum_and_memcpy (wsum,
+ ((u8 *)
+ vlib_buffer_get_current (b0)) +
+ vh->csum_start + vlan_len,
+ (u8 *) tph + tph->tp_mac +
+ offset + vh->csum_start,
+ (bytes_to_copy - vh->csum_start));
+ }
+ else
+ {
+ wsum =
+ ip_csum_and_memcpy (wsum,
+ ((u8 *)
+ vlib_buffer_get_current (b0)) +
+ bytes_copied + vlan_len,
+ (u8 *) tph + tph->tp_mac +
+ offset + bytes_copied,
+ (bytes_to_copy - bytes_copied));
+ }
+ }
+ else
+ {
+ clib_memcpy (((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;
+ b0->current_length = bytes_to_copy + vlan_len;
if (offset == 0)
{
offset += bytes_to_copy;
data_len -= bytes_to_copy;
}
+ if (PREDICT_TRUE ((do_vnet != 0) && (do_csum != 0)))
+ {
+ *wsum_addr = ~ip_csum_fold (wsum);
+ }
n_rx_packets++;
n_rx_bytes += tph->tp_snaplen;
to_next[0] = first_bi0;
}
/* redirect if feature path enabled */
- vnet_feature_start_device_input_x1 (apif->sw_if_index, &next0, b0,
- 0);
+ vnet_feature_start_device_input_x1 (apif->sw_if_index, &next0, b0);
/* enque and take next packet */
vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
vlib_increment_combined_counter
(vnet_get_main ()->interface_main.combined_sw_if_counters
+ VNET_INTERFACE_COUNTER_RX,
- os_get_cpu_number (), apif->hw_if_index, n_rx_packets, n_rx_bytes);
+ vlib_get_thread_index (), apif->hw_if_index, n_rx_packets, n_rx_bytes);
- vnet_device_increment_rx_packets (cpu_index, n_rx_packets);
+ vnet_device_increment_rx_packets (thread_index, n_rx_packets);
return n_rx_packets;
}
af_packet_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- int i;
u32 n_rx_packets = 0;
- u32 cpu_index = os_get_cpu_number ();
af_packet_main_t *apm = &af_packet_main;
- af_packet_if_t *apif;
+ vnet_device_input_runtime_t *rt = (void *) node->runtime_data;
+ vnet_device_and_queue_t *dq;
- for (i = 0; i < vec_len (apm->interfaces); i++)
- {
- apif = vec_elt_at_index (apm->interfaces, i);
- if (apif->is_admin_up &&
- (i % apm->input_cpu_count) ==
- (cpu_index - apm->input_cpu_first_index))
- n_rx_packets += af_packet_device_input_fn (vm, node, frame, apif);
- }
+ foreach_device_and_queue (dq, rt->devices_and_queues)
+ {
+ af_packet_if_t *apif;
+ apif = vec_elt_at_index (apm->interfaces, dq->dev_instance);
+ if (apif->is_admin_up)
+ n_rx_packets += af_packet_device_input_fn (vm, node, frame, apif);
+ }
return n_rx_packets;
}
.sibling_of = "device-input",
.format_trace = format_af_packet_input_trace,
.type = VLIB_NODE_TYPE_INPUT,
- /**
- * default state is INTERRUPT mode, switch to POLLING if worker threads are enabled
- */
.state = VLIB_NODE_STATE_INTERRUPT,
.n_errors = AF_PACKET_INPUT_N_ERROR,
.error_strings = af_packet_input_error_strings,
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