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gerrit.nordix.org / fdio / vpp / a0abbff4849e8b8721b70769ae1f3ef27dd6733c / . / src / vnet / interface_output.c
blob: 2a41271852ab39f4f5880c1ea4706fbe4d71a293 [file] [log] [blame]
/*
* Copyright (c) 2015 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.
*/
/*
* interface_output.c: interface output node
*
* Copyright (c) 2008 Eliot Dresselhaus
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <vnet/vnet.h>
#include <vnet/ip/icmp46_packet.h>
#include <vnet/ip/ip4.h>
#include <vnet/ip/ip6.h>
#include <vnet/udp/udp_packet.h>
#include <vnet/feature/feature.h>
typedef struct
{
u32 sw_if_index;
u32 flags;
u16 gso_size;
u8 gso_l4_hdr_sz;
u8 data[128 - 3 * sizeof (u32)];
}
interface_output_trace_t;
#ifndef CLIB_MARCH_VARIANT
u8 *
format_vnet_interface_output_trace (u8 * s, va_list * va)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
vlib_node_t *node = va_arg (*va, vlib_node_t *);
interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *);
vnet_main_t *vnm = vnet_get_main ();
vnet_sw_interface_t *si;
u32 indent;
if (t->sw_if_index != (u32) ~ 0)
{
indent = format_get_indent (s);
if (pool_is_free_index
(vnm->interface_main.sw_interfaces, t->sw_if_index))
{
/* the interface may have been deleted by the time the trace is printed */
s = format (s, "sw_if_index: %d ", t->sw_if_index);
}
else
{
si = vnet_get_sw_interface (vnm, t->sw_if_index);
s =
format (s, "%U ", format_vnet_sw_interface_name, vnm, si,
t->flags);
}
#define _(bit, name, v, x) \
if (v && (t->flags & VNET_BUFFER_F_##name)) \
s = format (s, "%s ", v);
foreach_vnet_buffer_flag
#undef _
if (t->flags & VNET_BUFFER_F_GSO)
{
s = format (s, "\n%Ugso_sz %d gso_l4_hdr_sz %d",
format_white_space, indent + 2, t->gso_size,
t->gso_l4_hdr_sz);
}
s =
format (s, "\n%U%U", format_white_space, indent,
node->format_buffer ? node->format_buffer : format_hex_bytes,
t->data, sizeof (t->data));
}
return s;
}
static void
vnet_interface_output_trace (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame, uword n_buffers)
{
u32 n_left, *from;
n_left = n_buffers;
from = vlib_frame_vector_args (frame);
while (n_left >= 4)
{
u32 bi0, bi1;
vlib_buffer_t *b0, *b1;
interface_output_trace_t *t0, *t1;
/* Prefetch next iteration. */
vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
bi0 = from[0];
bi1 = from[1];
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
if (b0->flags & VLIB_BUFFER_IS_TRACED)
{
t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
t0->flags = b0->flags;
t0->gso_size = vnet_buffer2 (b0)->gso_size;
t0->gso_l4_hdr_sz = vnet_buffer2 (b0)->gso_l4_hdr_sz;
clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
sizeof (t0->data));
}
if (b1->flags & VLIB_BUFFER_IS_TRACED)
{
t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
t1->flags = b1->flags;
t1->gso_size = vnet_buffer2 (b1)->gso_size;
t1->gso_l4_hdr_sz = vnet_buffer2 (b1)->gso_l4_hdr_sz;
clib_memcpy_fast (t1->data, vlib_buffer_get_current (b1),
sizeof (t1->data));
}
from += 2;
n_left -= 2;
}
while (n_left >= 1)
{
u32 bi0;
vlib_buffer_t *b0;
interface_output_trace_t *t0;
bi0 = from[0];
b0 = vlib_get_buffer (vm, bi0);
if (b0->flags & VLIB_BUFFER_IS_TRACED)
{
t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
t0->flags = b0->flags;
t0->gso_size = vnet_buffer2 (b0)->gso_size;
t0->gso_l4_hdr_sz = vnet_buffer2 (b0)->gso_l4_hdr_sz;
clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
sizeof (t0->data));
}
from += 1;
n_left -= 1;
}
}
static_always_inline void
calc_checksums (vlib_main_t * vm, vlib_buffer_t * b)
{
tcp_header_t *th;
udp_header_t *uh;
int is_ip4 = (b->flags & VNET_BUFFER_F_IS_IP4) != 0;
int is_ip6 = (b->flags & VNET_BUFFER_F_IS_IP6) != 0;
ASSERT (!(is_ip4 && is_ip6));
th = (tcp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
uh = (udp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
if (is_ip4)
{
ip4_header_t *ip4;
ip4 = (ip4_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
if (b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM)
ip4->checksum = ip4_header_checksum (ip4);
if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
{
th->checksum = 0;
th->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
}
else if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
uh->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
}
else if (is_ip6)
{
int bogus;
ip6_header_t *ip6;
ip6 = (ip6_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
{
th->checksum = 0;
th->checksum =
ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
}
else if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
{
uh->checksum = 0;
uh->checksum =
ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
}
}
b->flags &= ~VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
b->flags &= ~VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
b->flags &= ~VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
}
static_always_inline u16
tso_alloc_tx_bufs (vlib_main_t * vm,
vnet_interface_per_thread_data_t * ptd,
vlib_buffer_t * b0, u16 l4_hdr_sz)
{
u32 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0);
u16 gso_size = vnet_buffer2 (b0)->gso_size;
u16 l234_sz = vnet_buffer (b0)->l4_hdr_offset + l4_hdr_sz;
/* rounded-up division */
u16 n_bufs = (n_bytes_b0 - l234_sz + (gso_size - 1)) / gso_size;
u16 n_alloc;
ASSERT (n_bufs > 0);
vec_validate (ptd->split_buffers, n_bufs - 1);
n_alloc = vlib_buffer_alloc (vm, ptd->split_buffers, n_bufs);
if (n_alloc < n_bufs)
{
vlib_buffer_free (vm, ptd->split_buffers, n_alloc);
return 0;
}
return 1;
}
static_always_inline void
tso_init_buf_from_template_base (vlib_buffer_t * nb0, vlib_buffer_t * b0,
u32 flags, u16 length)
{
nb0->current_data = 0;
nb0->total_length_not_including_first_buffer = 0;
nb0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID | flags;
clib_memcpy_fast (&nb0->opaque, &b0->opaque, sizeof (nb0->opaque));
clib_memcpy_fast (nb0->data, b0->data, length);
nb0->current_length = length;
}
static_always_inline void
tso_init_buf_from_template (vlib_main_t * vm, vlib_buffer_t * nb0,
vlib_buffer_t * b0, u16 template_data_sz,
u16 gso_size, u8 ** p_dst_ptr, u16 * p_dst_left,
u32 next_tcp_seq, u32 flags)
{
tso_init_buf_from_template_base (nb0, b0, flags, template_data_sz);
*p_dst_left =
clib_min (gso_size,
vlib_buffer_get_default_data_size (vm) - template_data_sz);
*p_dst_ptr = nb0->data + template_data_sz;
tcp_header_t *tcp =
(tcp_header_t *) (nb0->data + vnet_buffer (nb0)->l4_hdr_offset);
tcp->seq_number = clib_host_to_net_u32 (next_tcp_seq);
}
static_always_inline void
tso_fixup_segmented_buf (vlib_buffer_t * b0, u8 tcp_flags, int is_ip6)
{
u16 l3_hdr_offset = vnet_buffer (b0)->l3_hdr_offset;
u16 l4_hdr_offset = vnet_buffer (b0)->l4_hdr_offset;
ip4_header_t *ip4 = (ip4_header_t *) (b0->data + l3_hdr_offset);
ip6_header_t *ip6 = (ip6_header_t *) (b0->data + l3_hdr_offset);
tcp_header_t *tcp = (tcp_header_t *) (b0->data + l4_hdr_offset);
tcp->flags = tcp_flags;
if (is_ip6)
ip6->payload_length =
clib_host_to_net_u16 (b0->current_length -
vnet_buffer (b0)->l4_hdr_offset);
else
ip4->length =
clib_host_to_net_u16 (b0->current_length -
vnet_buffer (b0)->l3_hdr_offset);
}
/**
* Allocate the necessary number of ptd->split_buffers,
* and segment the possibly chained buffer(s) from b0 into
* there.
*
* Return the cumulative number of bytes sent or zero
* if allocation failed.
*/
static_always_inline u32
tso_segment_buffer (vlib_main_t * vm, vnet_interface_per_thread_data_t * ptd,
int do_tx_offloads, u32 sbi0, vlib_buffer_t * sb0,
u32 n_bytes_b0)
{
u32 n_tx_bytes = 0;
int is_ip4 = sb0->flags & VNET_BUFFER_F_IS_IP4;
int is_ip6 = sb0->flags & VNET_BUFFER_F_IS_IP6;
ASSERT (is_ip4 || is_ip6);
ASSERT (sb0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID);
ASSERT (sb0->flags & VNET_BUFFER_F_L3_HDR_OFFSET_VALID);
ASSERT (sb0->flags & VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
u16 gso_size = vnet_buffer2 (sb0)->gso_size;
int l4_hdr_sz = vnet_buffer2 (sb0)->gso_l4_hdr_sz;
u8 save_tcp_flags = 0;
u8 tcp_flags_no_fin_psh = 0;
u32 next_tcp_seq = 0;
tcp_header_t *tcp =
(tcp_header_t *) (sb0->data + vnet_buffer (sb0)->l4_hdr_offset);
next_tcp_seq = clib_net_to_host_u32 (tcp->seq_number);
/* store original flags for last packet and reset FIN and PSH */
save_tcp_flags = tcp->flags;
tcp_flags_no_fin_psh = tcp->flags & ~(TCP_FLAG_FIN | TCP_FLAG_PSH);
tcp->checksum = 0;
u32 default_bflags =
sb0->flags & ~(VNET_BUFFER_F_GSO | VLIB_BUFFER_NEXT_PRESENT);
u16 l234_sz = vnet_buffer (sb0)->l4_hdr_offset + l4_hdr_sz;
int first_data_size = clib_min (gso_size, sb0->current_length - l234_sz);
next_tcp_seq += first_data_size;
if (PREDICT_FALSE (!tso_alloc_tx_bufs (vm, ptd, sb0, l4_hdr_sz)))
return 0;
vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[0]);
tso_init_buf_from_template_base (b0, sb0, default_bflags,
l234_sz + first_data_size);
u32 total_src_left = n_bytes_b0 - l234_sz - first_data_size;
if (total_src_left)
{
/* Need to copy more segments */
u8 *src_ptr, *dst_ptr;
u16 src_left, dst_left;
/* current source buffer */
vlib_buffer_t *csb0 = sb0;
u32 csbi0 = sbi0;
/* current dest buffer */
vlib_buffer_t *cdb0;
u16 dbi = 1; /* the buffer [0] is b0 */
src_ptr = sb0->data + l234_sz + first_data_size;
src_left = sb0->current_length - l234_sz - first_data_size;
b0->current_length = l234_sz + first_data_size;
tso_fixup_segmented_buf (b0, tcp_flags_no_fin_psh, is_ip6);
if (do_tx_offloads)
calc_checksums (vm, b0);
/* grab a second buffer and prepare the loop */
ASSERT (dbi < vec_len (ptd->split_buffers));
cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
tso_init_buf_from_template (vm, cdb0, b0, l234_sz, gso_size, &dst_ptr,
&dst_left, next_tcp_seq, default_bflags);
/* an arbitrary large number to catch the runaway loops */
int nloops = 2000;
while (total_src_left)
{
if (nloops-- <= 0)
clib_panic ("infinite loop detected");
u16 bytes_to_copy = clib_min (src_left, dst_left);
clib_memcpy_fast (dst_ptr, src_ptr, bytes_to_copy);
src_left -= bytes_to_copy;
src_ptr += bytes_to_copy;
total_src_left -= bytes_to_copy;
dst_left -= bytes_to_copy;
dst_ptr += bytes_to_copy;
next_tcp_seq += bytes_to_copy;
cdb0->current_length += bytes_to_copy;
if (0 == src_left)
{
int has_next = (csb0->flags & VLIB_BUFFER_NEXT_PRESENT);
u32 next_bi = csb0->next_buffer;
/* init src to the next buffer in chain */
if (has_next)
{
csbi0 = next_bi;
csb0 = vlib_get_buffer (vm, csbi0);
src_left = csb0->current_length;
src_ptr = vlib_buffer_get_current (csb0);
}
else
{
ASSERT (total_src_left == 0);
break;
}
}
if (0 == dst_left && total_src_left)
{
if (do_tx_offloads)
calc_checksums (vm, cdb0);
n_tx_bytes += cdb0->current_length;
ASSERT (dbi < vec_len (ptd->split_buffers));
cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
tso_init_buf_from_template (vm, cdb0, b0, l234_sz,
gso_size, &dst_ptr, &dst_left,
next_tcp_seq, default_bflags);
}
}
tso_fixup_segmented_buf (cdb0, save_tcp_flags, is_ip6);
if (do_tx_offloads)
calc_checksums (vm, cdb0);
n_tx_bytes += cdb0->current_length;
}
n_tx_bytes += b0->current_length;
return n_tx_bytes;
}
static_always_inline void
drop_one_buffer_and_count (vlib_main_t * vm, vnet_main_t * vnm,
vlib_node_runtime_t * node, u32 * pbi0,
u32 drop_error_code)
{
u32 thread_index = vm->thread_index;
vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
vlib_simple_counter_main_t *cm;
cm =
vec_elt_at_index (vnm->interface_main.sw_if_counters,
VNET_INTERFACE_COUNTER_TX_ERROR);
vlib_increment_simple_counter (cm, thread_index, rt->sw_if_index, 1);
vlib_error_drop_buffers (vm, node, pbi0,
/* buffer stride */ 1,
/* n_buffers */ 1,
VNET_INTERFACE_OUTPUT_NEXT_DROP,
node->node_index, drop_error_code);
}
static_always_inline uword
vnet_interface_output_node_inline_gso (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame,
vnet_main_t * vnm,
vnet_hw_interface_t * hi,
int do_tx_offloads,
int do_segmentation)
{
vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
vnet_sw_interface_t *si;
u32 n_left_to_tx, *from, *from_end, *to_tx;
u32 n_bytes, n_buffers, n_packets;
u32 n_bytes_b0, n_bytes_b1, n_bytes_b2, n_bytes_b3;
u32 thread_index = vm->thread_index;
vnet_interface_main_t *im = &vnm->interface_main;
u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
u32 current_config_index = ~0;
u8 arc = im->output_feature_arc_index;
vnet_interface_per_thread_data_t *ptd =
vec_elt_at_index (im->per_thread_data, thread_index);
vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
n_buffers = frame->n_vectors;
if (node->flags & VLIB_NODE_FLAG_TRACE)
vnet_interface_output_trace (vm, node, frame, n_buffers);
from = vlib_frame_vector_args (frame);
vlib_get_buffers (vm, from, b, n_buffers);
if (rt->is_deleted)
return vlib_error_drop_buffers (vm, node, from,
/* buffer stride */ 1,
n_buffers,
VNET_INTERFACE_OUTPUT_NEXT_DROP,
node->node_index,
VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
si = vnet_get_sw_interface (vnm, rt->sw_if_index);
hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
if (!(si->flags & (VNET_SW_INTERFACE_FLAG_ADMIN_UP |
VNET_SW_INTERFACE_FLAG_BOND_SLAVE)) ||
!(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
{
vlib_simple_counter_main_t *cm;
cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
VNET_INTERFACE_COUNTER_TX_ERROR);
vlib_increment_simple_counter (cm, thread_index,
rt->sw_if_index, n_buffers);
return vlib_error_drop_buffers (vm, node, from,
/* buffer stride */ 1,
n_buffers,
VNET_INTERFACE_OUTPUT_NEXT_DROP,
node->node_index,
VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
}
from_end = from + n_buffers;
/* Total byte count of all buffers. */
n_bytes = 0;
n_packets = 0;
/* interface-output feature arc handling */
if (PREDICT_FALSE (vnet_have_features (arc, rt->sw_if_index)))
{
vnet_feature_config_main_t *fcm;
fcm = vnet_feature_get_config_main (arc);
current_config_index = vnet_get_feature_config_index (arc,
rt->sw_if_index);
vnet_get_config_data (&fcm->config_main, &current_config_index,
&next_index, 0);
}
while (from < from_end)
{
/* Get new next frame since previous incomplete frame may have less
than VNET_FRAME_SIZE vectors in it. */
vlib_get_new_next_frame (vm, node, next_index, to_tx, n_left_to_tx);
while (from + 8 <= from_end && n_left_to_tx >= 4)
{
u32 bi0, bi1, bi2, bi3;
u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
u32 or_flags;
/* Prefetch next iteration. */
vlib_prefetch_buffer_header (b[4], LOAD);
vlib_prefetch_buffer_header (b[5], LOAD);
vlib_prefetch_buffer_header (b[6], LOAD);
vlib_prefetch_buffer_header (b[7], LOAD);
bi0 = from[0];
bi1 = from[1];
bi2 = from[2];
bi3 = from[3];
to_tx[0] = bi0;
to_tx[1] = bi1;
to_tx[2] = bi2;
to_tx[3] = bi3;
or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
if (do_segmentation)
{
/* go to single loop if we need TSO segmentation */
if (PREDICT_FALSE (or_flags & VNET_BUFFER_F_GSO))
break;
}
from += 4;
to_tx += 4;
n_left_to_tx -= 4;
/* Be grumpy about zero length buffers for benefit of
driver tx function. */
ASSERT (b[0]->current_length > 0);
ASSERT (b[1]->current_length > 0);
ASSERT (b[2]->current_length > 0);
ASSERT (b[3]->current_length > 0);
n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
n_bytes_b1 = vlib_buffer_length_in_chain (vm, b[1]);
n_bytes_b2 = vlib_buffer_length_in_chain (vm, b[2]);
n_bytes_b3 = vlib_buffer_length_in_chain (vm, b[3]);
tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
n_bytes += n_bytes_b0 + n_bytes_b1;
n_bytes += n_bytes_b2 + n_bytes_b3;
n_packets += 4;
if (PREDICT_FALSE (current_config_index != ~0))
{
vnet_buffer (b[0])->feature_arc_index = arc;
vnet_buffer (b[1])->feature_arc_index = arc;
vnet_buffer (b[2])->feature_arc_index = arc;
vnet_buffer (b[3])->feature_arc_index = arc;
b[0]->current_config_index = current_config_index;
b[1]->current_config_index = current_config_index;
b[2]->current_config_index = current_config_index;
b[3]->current_config_index = current_config_index;
}
/* update vlan subif tx counts, if required */
if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
{
vlib_increment_combined_counter (im->combined_sw_if_counters +
VNET_INTERFACE_COUNTER_TX,
thread_index, tx_swif0, 1,
n_bytes_b0);
}
if (PREDICT_FALSE (tx_swif1 != rt->sw_if_index))
{
vlib_increment_combined_counter (im->combined_sw_if_counters +
VNET_INTERFACE_COUNTER_TX,
thread_index, tx_swif1, 1,
n_bytes_b1);
}
if (PREDICT_FALSE (tx_swif2 != rt->sw_if_index))
{
vlib_increment_combined_counter (im->combined_sw_if_counters +
VNET_INTERFACE_COUNTER_TX,
thread_index, tx_swif2, 1,
n_bytes_b2);
}
if (PREDICT_FALSE (tx_swif3 != rt->sw_if_index))
{
vlib_increment_combined_counter (im->combined_sw_if_counters +
VNET_INTERFACE_COUNTER_TX,
thread_index, tx_swif3, 1,
n_bytes_b3);
}
if (do_tx_offloads)
{
if (or_flags &
(VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
VNET_BUFFER_F_OFFLOAD_UDP_CKSUM |
VNET_BUFFER_F_OFFLOAD_IP_CKSUM))
{
calc_checksums (vm, b[0]);
calc_checksums (vm, b[1]);
calc_checksums (vm, b[2]);
calc_checksums (vm, b[3]);
}
}
b += 4;
}
while (from + 1 <= from_end && n_left_to_tx >= 1)
{
u32 bi0;
u32 tx_swif0;
bi0 = from[0];
to_tx[0] = bi0;
from += 1;
to_tx += 1;
n_left_to_tx -= 1;
/* Be grumpy about zero length buffers for benefit of
driver tx function. */
ASSERT (b[0]->current_length > 0);
n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
n_bytes += n_bytes_b0;
n_packets += 1;
if (PREDICT_FALSE (current_config_index != ~0))
{
vnet_buffer (b[0])->feature_arc_index = arc;
b[0]->current_config_index = current_config_index;
}
if (do_segmentation)
{
if (PREDICT_FALSE (b[0]->flags & VNET_BUFFER_F_GSO))
{
/*
* Undo the enqueue of the b0 - it is not going anywhere,
* and will be freed either after it's segmented or
* when dropped, if there is no buffers to segment into.
*/
to_tx -= 1;
n_left_to_tx += 1;
/* undo the counting. */
n_bytes -= n_bytes_b0;
n_packets -= 1;
u32 n_tx_bytes = 0;
n_tx_bytes =
tso_segment_buffer (vm, ptd, do_tx_offloads, bi0, b[0],
n_bytes_b0);
if (PREDICT_FALSE (n_tx_bytes == 0))
{
drop_one_buffer_and_count (vm, vnm, node, from - 1,
VNET_INTERFACE_OUTPUT_ERROR_NO_BUFFERS_FOR_GSO);
b += 1;
continue;
}
u16 n_tx_bufs = vec_len (ptd->split_buffers);
u32 *from_tx_seg = ptd->split_buffers;
while (n_tx_bufs > 0)
{
if (n_tx_bufs >= n_left_to_tx)
{
while (n_left_to_tx > 0)
{
to_tx[0] = from_tx_seg[0];
to_tx += 1;
from_tx_seg += 1;
n_left_to_tx -= 1;
n_tx_bufs -= 1;
n_packets += 1;
}
vlib_put_next_frame (vm, node, next_index,
n_left_to_tx);
vlib_get_new_next_frame (vm, node, next_index,
to_tx, n_left_to_tx);
}
while (n_tx_bufs > 0)
{
to_tx[0] = from_tx_seg[0];
to_tx += 1;
from_tx_seg += 1;
n_left_to_tx -= 1;
n_tx_bufs -= 1;
n_packets += 1;
}
}
n_bytes += n_tx_bytes;
if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
{
vlib_increment_combined_counter
(im->combined_sw_if_counters +
VNET_INTERFACE_COUNTER_TX, thread_index, tx_swif0,
_vec_len (ptd->split_buffers), n_tx_bytes);
}
/* The buffers were enqueued. Reset the length */
_vec_len (ptd->split_buffers) = 0;
/* Free the now segmented buffer */
vlib_buffer_free_one (vm, bi0);
b += 1;
continue;
}
}
if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
{
vlib_increment_combined_counter (im->combined_sw_if_counters +
VNET_INTERFACE_COUNTER_TX,
thread_index, tx_swif0, 1,
n_bytes_b0);
}
if (do_tx_offloads)
calc_checksums (vm, b[0]);
b += 1;
}
vlib_put_next_frame (vm, node, next_index, n_left_to_tx);
}
/* Update main interface stats. */
vlib_increment_combined_counter (im->combined_sw_if_counters
+ VNET_INTERFACE_COUNTER_TX,
thread_index,
rt->sw_if_index, n_packets, n_bytes);
return n_buffers;
}
#endif /* CLIB_MARCH_VARIANT */
static_always_inline void vnet_interface_pcap_tx_trace
(vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame,
int sw_if_index_from_buffer)
{
u32 n_left_from, *from;
u32 sw_if_index;
if (PREDICT_TRUE (vm->pcap[VLIB_TX].pcap_enable == 0))
return;
if (sw_if_index_from_buffer == 0)
{
vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
sw_if_index = rt->sw_if_index;
}
else
sw_if_index = ~0;
n_left_from = frame->n_vectors;
from = vlib_frame_vector_args (frame);
while (n_left_from > 0)
{
u32 bi0 = from[0];
vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
if (sw_if_index_from_buffer)
sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
if (vm->pcap[VLIB_TX].pcap_sw_if_index == 0 ||
vm->pcap[VLIB_TX].pcap_sw_if_index == sw_if_index)
pcap_add_buffer (&vm->pcap[VLIB_TX].pcap_main, vm, bi0, 512);
from++;
n_left_from--;
}
}
#ifndef CLIB_MARCH_VARIANT
static_always_inline uword
vnet_interface_output_node_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame, vnet_main_t * vnm,
vnet_hw_interface_t * hi,
int do_tx_offloads)
{
/*
* The 3-headed "if" is here because we want to err on the side
* of not impacting the non-GSO performance - so for the more
* common case of no GSO interfaces we want to prevent the
* segmentation codepath from being there altogether.
*/
if (PREDICT_TRUE (vnm->interface_main.gso_interface_count == 0))
return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
do_tx_offloads,
/* do_segmentation */ 0);
else if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
do_tx_offloads,
/* do_segmentation */ 0);
else
return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
do_tx_offloads,
/* do_segmentation */ 1);
}
uword
vnet_interface_output_node (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
vnet_main_t *vnm = vnet_get_main ();
vnet_hw_interface_t *hi;
vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
vnet_interface_pcap_tx_trace (vm, node, frame,
0 /* sw_if_index_from_buffer */ );
if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD)
return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
/* do_tx_offloads */ 0);
else
return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
/* do_tx_offloads */ 1);
}
#endif /* CLIB_MARCH_VARIANT */
/* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
vlib_node_runtime_t *
node,
vlib_frame_t * frame)
{
vnet_main_t *vnm = vnet_get_main ();
u32 n_left_to_next, *from, *to_next;
u32 n_left_from, next_index;
vnet_interface_pcap_tx_trace (vm, node, frame,
1 /* sw_if_index_from_buffer */ );
n_left_from = frame->n_vectors;
from = vlib_frame_vector_args (frame);
next_index = node->cached_next_index;
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from >= 4 && n_left_to_next >= 2)
{
u32 bi0, bi1, next0, next1;
vlib_buffer_t *b0, *b1;
vnet_hw_interface_t *hi0, *hi1;
/* Prefetch next iteration. */
vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
bi0 = from[0];
bi1 = from[1];
to_next[0] = bi0;
to_next[1] = bi1;
from += 2;
to_next += 2;
n_left_to_next -= 2;
n_left_from -= 2;
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
hi0 =
vnet_get_sup_hw_interface (vnm,
vnet_buffer (b0)->sw_if_index
[VLIB_TX]);
hi1 =
vnet_get_sup_hw_interface (vnm,
vnet_buffer (b1)->sw_if_index
[VLIB_TX]);
next0 = hi0->output_node_next_index;
next1 = hi1->output_node_next_index;
vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
n_left_to_next, bi0, bi1, next0,
next1);
}
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 bi0, next0;
vlib_buffer_t *b0;
vnet_hw_interface_t *hi0;
bi0 = from[0];
to_next[0] = bi0;
from += 1;
to_next += 1;
n_left_to_next -= 1;
n_left_from -= 1;
b0 = vlib_get_buffer (vm, bi0);
hi0 =
vnet_get_sup_hw_interface (vnm,
vnet_buffer (b0)->sw_if_index
[VLIB_TX]);
next0 = hi0->output_node_next_index;
vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
n_left_to_next, bi0, next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
return frame->n_vectors;
}
typedef struct vnet_error_trace_t_
{
u32 sw_if_index;
} vnet_error_trace_t;
static u8 *
format_vnet_error_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 *);
vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
s = format (s, "rx:%U", format_vnet_sw_if_index_name,
vnet_get_main (), t->sw_if_index);
return s;
}
static void
interface_trace_buffers (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
u32 n_left, *buffers;
buffers = vlib_frame_vector_args (frame);
n_left = frame->n_vectors;
while (n_left >= 4)
{
u32 bi0, bi1;
vlib_buffer_t *b0, *b1;
vnet_error_trace_t *t0, *t1;
/* Prefetch next iteration. */
vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
bi0 = buffers[0];
bi1 = buffers[1];
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
if (b0->flags & VLIB_BUFFER_IS_TRACED)
{
t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
}
if (b1->flags & VLIB_BUFFER_IS_TRACED)
{
t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
}
buffers += 2;
n_left -= 2;
}
while (n_left >= 1)
{
u32 bi0;
vlib_buffer_t *b0;
vnet_error_trace_t *t0;
bi0 = buffers[0];
b0 = vlib_get_buffer (vm, bi0);
if (b0->flags & VLIB_BUFFER_IS_TRACED)
{
t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
}
buffers += 1;
n_left -= 1;
}
}
typedef enum
{
VNET_ERROR_DISPOSITION_DROP,
VNET_ERROR_DISPOSITION_PUNT,
VNET_ERROR_N_DISPOSITION,
} vnet_error_disposition_t;
static_always_inline uword
interface_drop_punt (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame,
vnet_error_disposition_t disposition)
{
u32 *from, n_left, thread_index, *sw_if_index;
vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
u32 sw_if_indices[VLIB_FRAME_SIZE];
vlib_simple_counter_main_t *cm;
u16 nexts[VLIB_FRAME_SIZE];
vnet_main_t *vnm;
vnm = vnet_get_main ();
thread_index = vm->thread_index;
from = vlib_frame_vector_args (frame);
n_left = frame->n_vectors;
b = bufs;
sw_if_index = sw_if_indices;
vlib_get_buffers (vm, from, bufs, n_left);
if (node->flags & VLIB_NODE_FLAG_TRACE)
interface_trace_buffers (vm, node, frame);
/* All going to drop regardless, this is just a counting exercise */
clib_memset (nexts, 0, sizeof (nexts));
cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
(disposition == VNET_ERROR_DISPOSITION_PUNT
? VNET_INTERFACE_COUNTER_PUNT
: VNET_INTERFACE_COUNTER_DROP));
/* collect the array of interfaces first ... */
while (n_left >= 4)
{
if (n_left >= 12)
{
/* Prefetch 8 ahead - there's not much going on in each iteration */
vlib_prefetch_buffer_header (b[4], LOAD);
vlib_prefetch_buffer_header (b[5], LOAD);
vlib_prefetch_buffer_header (b[6], LOAD);
vlib_prefetch_buffer_header (b[7], LOAD);
}
sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
sw_if_index += 4;
n_left -= 4;
b += 4;
}
while (n_left)
{
sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
sw_if_index += 1;
n_left -= 1;
b += 1;
}
/* ... then count against them in blocks */
n_left = frame->n_vectors;
while (n_left)
{
vnet_sw_interface_t *sw_if0;
u16 off, count;
off = frame->n_vectors - n_left;
sw_if_index = sw_if_indices + off;
count = clib_count_equal_u32 (sw_if_index, n_left);
n_left -= count;
vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
/* Increment super-interface drop/punt counters for
sub-interfaces. */
sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
if (sw_if0->sup_sw_if_index != sw_if_index[0])
vlib_increment_simple_counter
(cm, thread_index, sw_if0->sup_sw_if_index, count);
}
vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
return frame->n_vectors;
}
static inline void
pcap_drop_trace (vlib_main_t * vm,
vnet_interface_main_t * im, vlib_frame_t * f)
{
u32 *from;
u32 n_left = f->n_vectors;
vlib_buffer_t *b0, *p1;
u32 bi0;
i16 save_current_data;
u16 save_current_length;
from = vlib_frame_vector_args (f);
while (n_left > 0)
{
if (PREDICT_TRUE (n_left > 1))
{
p1 = vlib_get_buffer (vm, from[1]);
vlib_prefetch_buffer_header (p1, LOAD);
}
bi0 = from[0];
b0 = vlib_get_buffer (vm, bi0);
from++;
n_left--;
/* See if we're pointedly ignoring this specific error */
if (im->pcap_drop_filter_hash
&& hash_get (im->pcap_drop_filter_hash, b0->error))
continue;
/* Trace all drops, or drops received on a specific interface */
if (im->pcap_sw_if_index == 0 ||
im->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX])
{
save_current_data = b0->current_data;
save_current_length = b0->current_length;
/*
* Typically, we'll need to rewind the buffer
*/
if (b0->current_data > 0)
vlib_buffer_advance (b0, (word) - b0->current_data);
pcap_add_buffer (&im->pcap_main, vm, bi0, 512);
b0->current_data = save_current_data;
b0->current_length = save_current_length;
}
}
}
#ifndef CLIB_MARCH_VARIANT
void
vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
{
vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
if (im->pcap_drop_filter_hash == 0)
im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
if (is_add)
hash_set (im->pcap_drop_filter_hash, error_index, 1);
else
hash_unset (im->pcap_drop_filter_hash, error_index);
}
#endif /* CLIB_MARCH_VARIANT */
VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
if (PREDICT_FALSE (im->drop_pcap_enable))
pcap_drop_trace (vm, im, frame);
return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
}
VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (interface_drop) = {
.name = "error-drop",
.vector_size = sizeof (u32),
.format_trace = format_vnet_error_trace,
.n_next_nodes = 1,
.next_nodes = {
[0] = "drop",
},
};
/* *INDENT-ON* */
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (interface_punt) = {
.name = "error-punt",
.vector_size = sizeof (u32),
.format_trace = format_vnet_error_trace,
.n_next_nodes = 1,
.next_nodes = {
[0] = "punt",
},
};
/* *INDENT-ON* */
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
.name = "interface-output",
.vector_size = sizeof (u32),
};
/* *INDENT-ON* */
static uword
interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
vnet_main_t *vnm = vnet_get_main ();
u32 last_sw_if_index = ~0;
vlib_frame_t *to_frame = 0;
vnet_hw_interface_t *hw = 0;
u32 *from, *to_next = 0;
u32 n_left_from;
from = vlib_frame_vector_args (from_frame);
n_left_from = from_frame->n_vectors;
while (n_left_from > 0)
{
u32 bi0;
vlib_buffer_t *b0;
u32 sw_if_index0;
bi0 = from[0];
from++;
n_left_from--;
b0 = vlib_get_buffer (vm, bi0);
sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0))
{
if (to_frame)
{
hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index);
vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
}
last_sw_if_index = sw_if_index0;
hw = vnet_get_sup_hw_interface (vnm, sw_if_index0);
to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index);
to_next = vlib_frame_vector_args (to_frame);
}
to_next[0] = bi0;
to_next++;
to_frame->n_vectors++;
}
vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
return from_frame->n_vectors;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (interface_tx, static) = {
.function = interface_tx_node_fn,
.name = "interface-tx",
.vector_size = sizeof (u32),
.n_next_nodes = 1,
.next_nodes = {
[0] = "error-drop",
},
};
VNET_FEATURE_ARC_INIT (interface_output, static) =
{
.arc_name = "interface-output",
.start_nodes = VNET_FEATURES (0),
.last_in_arc = "interface-tx",
.arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
};
VNET_FEATURE_INIT (span_tx, static) = {
.arc_name = "interface-output",
.node_name = "span-output",
.runs_before = VNET_FEATURES ("interface-tx"),
};
VNET_FEATURE_INIT (ipsec_if_tx, static) = {
.arc_name = "interface-output",
.node_name = "ipsec-if-output",
.runs_before = VNET_FEATURES ("interface-tx"),
};
VNET_FEATURE_INIT (interface_tx, static) = {
.arc_name = "interface-output",
.node_name = "interface-tx",
.runs_before = 0,
};
/* *INDENT-ON* */
#ifndef CLIB_MARCH_VARIANT
clib_error_t *
vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
u32 hw_if_index,
u32 is_create)
{
vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
u32 next_index;
if (hi->output_node_index == 0)
return 0;
next_index = vlib_node_add_next
(vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
hi->output_node_index);
hi->output_node_next_index = next_index;
return 0;
}
VNET_HW_INTERFACE_ADD_DEL_FUNCTION
(vnet_per_buffer_interface_output_hw_interface_add_del);
void
vnet_set_interface_output_node (vnet_main_t * vnm,
u32 hw_if_index, u32 node_index)
{
ASSERT (node_index);
vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
u32 next_index = vlib_node_add_next
(vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
hi->output_node_next_index = next_index;
hi->output_node_index = node_index;
}
#endif /* CLIB_MARCH_VARIANT */
static clib_error_t *
pcap_drop_trace_command_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
vnet_main_t *vnm = vnet_get_main ();
vnet_interface_main_t *im = &vnm->interface_main;
u8 *filename;
u32 max;
int matched = 0;
clib_error_t *error = 0;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "on"))
{
if (im->drop_pcap_enable == 0)
{
if (im->pcap_filename == 0)
im->pcap_filename = format (0, "/tmp/drop.pcap%c", 0);
clib_memset (&im->pcap_main, 0, sizeof (im->pcap_main));
im->pcap_main.file_name = (char *) im->pcap_filename;
im->pcap_main.n_packets_to_capture = 100;
if (im->pcap_pkts_to_capture)
im->pcap_main.n_packets_to_capture = im->pcap_pkts_to_capture;
im->pcap_main.packet_type = PCAP_PACKET_TYPE_ethernet;
im->drop_pcap_enable = 1;
matched = 1;
vlib_cli_output (vm, "pcap drop capture on...");
}
else
{
vlib_cli_output (vm, "pcap drop capture already on...");
}
matched = 1;
}
else if (unformat (input, "off"))
{
matched = 1;
if (im->drop_pcap_enable)
{
vlib_cli_output (vm, "captured %d pkts...",
im->pcap_main.n_packets_captured);
if (im->pcap_main.n_packets_captured)
{
im->pcap_main.n_packets_to_capture =
im->pcap_main.n_packets_captured;
error = pcap_write (&im->pcap_main);
if (error)
clib_error_report (error);
else
vlib_cli_output (vm, "saved to %s...", im->pcap_filename);
}
}
else
{
vlib_cli_output (vm, "pcap drop capture already off...");
}
im->drop_pcap_enable = 0;
}
else if (unformat (input, "max %d", &max))
{
im->pcap_pkts_to_capture = max;
matched = 1;
}
else if (unformat (input, "intfc %U",
unformat_vnet_sw_interface, vnm,
&im->pcap_sw_if_index))
matched = 1;
else if (unformat (input, "intfc any"))
{
im->pcap_sw_if_index = 0;
matched = 1;
}
else if (unformat (input, "file %s", &filename))
{
u8 *chroot_filename;
/* Brain-police user path input */
if (strstr ((char *) filename, "..")
|| index ((char *) filename, '/'))
{
vlib_cli_output (vm, "illegal characters in filename '%s'",
filename);
continue;
}
chroot_filename = format (0, "/tmp/%s%c", filename, 0);
vec_free (filename);
if (im->pcap_filename)
vec_free (im->pcap_filename);
im->pcap_filename = chroot_filename;
im->pcap_main.file_name = (char *) im->pcap_filename;
matched = 1;
}
else if (unformat (input, "status"))
{
if (im->drop_pcap_enable == 0)
{
vlib_cli_output (vm, "pcap drop capture is off...");
continue;
}
vlib_cli_output (vm, "pcap drop capture: %d of %d pkts...",
im->pcap_main.n_packets_captured,
im->pcap_main.n_packets_to_capture);
matched = 1;
}
else
break;
}
if (matched == 0)
return clib_error_return (0, "unknown input `%U'",
format_unformat_error, input);
return 0;
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (pcap_trace_command, static) = {
.path = "pcap drop trace",
.short_help =
"pcap drop trace on off max <nn> intfc <intfc> file <name> status",
.function = pcap_drop_trace_command_fn,
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/