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/*
* 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.
*/
#ifndef __IP_PUNT_DROP_H__
#define __IP_PUNT_DROP_H__
#include <vnet/ip/ip.h>
#include <vnet/policer/policer.h>
#include <vnet/policer/police_inlines.h>
/**
* IP4 punt policer configuration
* we police the punt rate to prevent overloading the host
*/
typedef struct ip_punt_policer_t_
{
u32 policer_index;
} ip_punt_policer_t;
typedef enum ip_punt_policer_next_t_
{
IP_PUNT_POLICER_NEXT_DROP,
IP_PUNT_POLICER_N_NEXT,
} ip_punt_policer_next_t;
typedef struct ip_punt_policer_trace_t_
{
u32 policer_index;
u32 next;
} ip_punt_policer_trace_t;
#define foreach_ip_punt_policer_error \
_(DROP, "ip punt policer drop")
typedef enum
{
#define _(sym,str) IP_PUNT_POLICER_ERROR_##sym,
foreach_ip_punt_policer_error
#undef _
IP4_PUNT_POLICER_N_ERROR,
} ip_punt_policer_error_t;
extern u8 *format_ip_punt_policer_trace (u8 * s, va_list * args);
/**
* IP punt policing node function
*/
always_inline uword
ip_punt_policer (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame, u8 arc_index, u32 policer_index)
{
u32 *from, *to_next, n_left_from, n_left_to_next, next_index;
u64 time_in_policer_periods;
vnet_feature_main_t *fm = &feature_main;
vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc_index];
time_in_policer_periods =
clib_cpu_time_now () >> POLICER_TICKS_PER_PERIOD_SHIFT;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
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)
{
vlib_buffer_t *b0, *b1;
u32 next0, next1;
u8 act0, act1;
u32 bi0, bi1;
next0 = next1 = 0;
bi0 = to_next[0] = from[0];
bi1 = to_next[1] = from[1];
from += 2;
n_left_from -= 2;
to_next += 2;
n_left_to_next -= 2;
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
vnet_get_config_data (&cm->config_main,
&b0->current_config_index, &next0, 0);
vnet_get_config_data (&cm->config_main,
&b1->current_config_index, &next1, 0);
act0 = vnet_policer_police (vm, b0,
policer_index,
time_in_policer_periods,
POLICE_CONFORM);
act1 = vnet_policer_police (vm, b1,
policer_index,
time_in_policer_periods,
POLICE_CONFORM);
if (PREDICT_FALSE (act0 == SSE2_QOS_ACTION_DROP))
{
next0 = IP_PUNT_POLICER_NEXT_DROP;
b0->error = node->errors[IP_PUNT_POLICER_ERROR_DROP];
}
if (PREDICT_FALSE (act1 == SSE2_QOS_ACTION_DROP))
{
next1 = IP_PUNT_POLICER_NEXT_DROP;
b1->error = node->errors[IP_PUNT_POLICER_ERROR_DROP];
}
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
ip_punt_policer_trace_t *t =
vlib_add_trace (vm, node
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