2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #ifndef __POLICE_INLINES_H__
16 #define __POLICE_INLINES_H__
18 #include <vnet/policer/police.h>
19 #include <vnet/vnet.h>
20 #include <vnet/ip/ip.h>
22 #define IP4_NON_DSCP_BITS 0x03
23 #define IP4_DSCP_SHIFT 2
24 #define IP6_NON_DSCP_BITS 0xf03fffff
25 #define IP6_DSCP_SHIFT 22
27 static_always_inline void
28 vnet_policer_mark (vlib_buffer_t * b, u8 dscp)
30 ethernet_header_t *eh;
35 eh = (ethernet_header_t *) b->data;
36 type = clib_net_to_host_u16 (eh->type);
38 if (PREDICT_TRUE (type == ETHERNET_TYPE_IP4))
40 ip4h = (ip4_header_t *) & (b->data[sizeof (ethernet_header_t)]);;
41 ip4h->tos &= IP4_NON_DSCP_BITS;
42 ip4h->tos |= dscp << IP4_DSCP_SHIFT;
43 ip4h->checksum = ip4_header_checksum (ip4h);
47 if (PREDICT_TRUE (type == ETHERNET_TYPE_IP6))
49 ip6h = (ip6_header_t *) & (b->data[sizeof (ethernet_header_t)]);
50 ip6h->ip_version_traffic_class_and_flow_label &=
51 clib_host_to_net_u32 (IP6_NON_DSCP_BITS);
52 ip6h->ip_version_traffic_class_and_flow_label |=
53 clib_host_to_net_u32 (dscp << IP6_DSCP_SHIFT);
58 static_always_inline u8
59 vnet_policer_police (vlib_main_t * vm,
62 u64 time_in_policer_periods,
63 policer_result_e packet_color)
68 policer_read_response_type_st *pol;
69 vnet_policer_main_t *pm = &vnet_policer_main;
71 /* Speculative prefetch assuming a conform result */
72 vlib_prefetch_combined_counter (&policer_counters[POLICE_CONFORM],
73 vm->thread_index, policer_index);
75 len = vlib_buffer_length_in_chain (vm, b);
76 pol = &pm->policers[policer_index];
77 col = vnet_police_packet (pol, len, packet_color, time_in_policer_periods);
78 act = pol->action[col];
79 vlib_increment_combined_counter (&policer_counters[col], vm->thread_index,
80 policer_index, 1, len);
81 if (PREDICT_TRUE (act == SSE2_QOS_ACTION_MARK_AND_TRANSMIT))
82 vnet_policer_mark (b, pol->mark_dscp[col]);
89 POLICER_HANDOFF_ERROR_CONGESTION_DROP,
90 } policer_handoff_error_t;
92 typedef struct policer_handoff_trace_t_
95 u32 current_worker_index;
96 u32 next_worker_index;
97 } policer_handoff_trace_t;
99 extern u8 *format_policer_handoff_trace (u8 *s, va_list *args);
101 /* Do worker handoff based on the policer's thread_index */
102 static_always_inline uword
103 policer_handoff (vlib_main_t *vm, vlib_node_runtime_t *node,
104 vlib_frame_t *frame, u32 fq_index, u32 policer_index)
106 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
107 u16 thread_indices[VLIB_FRAME_SIZE], *ti;
108 u32 n_enq, n_left_from, *from;
109 vnet_policer_main_t *pm;
110 policer_read_response_type_st *policer;
111 u32 this_thread, policer_thread;
113 pm = &vnet_policer_main;
114 policer = &pm->policers[policer_index];
115 policer_thread = policer->thread_index;
117 this_thread = vm->thread_index;
118 from = vlib_frame_vector_args (frame);
119 n_left_from = frame->n_vectors;
120 vlib_get_buffers (vm, from, bufs, n_left_from);
125 while (n_left_from > 0)
127 ti[0] = policer_thread;
129 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
130 b[0]->flags & VLIB_BUFFER_IS_TRACED))
132 policer_handoff_trace_t *t =
133 vlib_add_trace (vm, node, b[0], sizeof (*t));
134 t->current_worker_index = this_thread;
135 t->next_worker_index = policer_thread;
136 t->policer_index = policer_index;
144 n_enq = vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
145 frame->n_vectors, 1);
147 if (n_enq < frame->n_vectors)
148 vlib_node_increment_counter (vm, node->node_index,
149 POLICER_HANDOFF_ERROR_CONGESTION_DROP,
150 frame->n_vectors - n_enq);
154 #endif // __POLICE_INLINES_H__
157 * fd.io coding-style-patch-verification: ON
160 * eval: (c-set-style "gnu")