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/*
* Copyright (c) 2019 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 <vnet/ip/ip.h>
#include <vnet/feature/feature.h>
#include <vnet/qos/qos_egress_map.h>
#include <vnet/qos/qos_mark.h>
extern index_t *qos_mark_configs[QOS_N_SOURCES];
always_inline qos_egress_map_t *
qos_egress_map_interface (u32 sw_if_index, qos_source_t output_source)
{
ASSERT (vec_len (qos_mark_configs[output_source]) > sw_if_index);
return pool_elt_at_index (qem_pool,
qos_mark_configs[output_source][sw_if_index]);
}
/**
* per-packet trace data
*/
typedef struct qos_mark_trace_t_
{
/* per-pkt trace data */
qos_bits_t bits;
qos_source_t input;
u32 used;
} qos_mark_trace_t;
static inline uword
qos_mark_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame, qos_source_t output_source, int is_ip6)
{
u32 n_left_from, *from, *to_next, next_index;
next_index = 0;
n_left_from = frame->n_vectors;
from = vlib_frame_vector_args (frame);
while (n_left_from > 0)
{
u32 n_left_to_next;
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
qos_source_t input_source0;
ethernet_vlan_header_t *vlan0;
u32 sw_if_index0, next0, bi0;
qos_egress_map_t *qem0;
ip4_header_t *ip4_0;
ip6_header_t *ip6_0;
vlib_buffer_t *b0;
qos_bits_t qos0;
u8 *mpls_bytes_0;
u8 eos0;
next0 = 0;
bi0 = from[0];
to_next[0] = bi0;
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
input_source0 = vnet_buffer2 (b0)->qos.source;
qem0 = qos_egress_map_interface (sw_if_index0, output_source);
qos0 = qem0->qem_output[input_source0][vnet_buffer2 (b0)->qos.bits];
if (PREDICT_TRUE (b0->flags & VNET_BUFFER_F_QOS_DATA_VALID))
{
/* there is a source of QoS recording for this packet */
if (QOS_SOURCE_IP == output_source)
{
if (is_ip6)
{
ip6_0 = (vlib_buffer_get_current (b0) +
vnet_buffer (b0)->ip.save_rewrite_length);
ip6_set_traffic_class_network_order (ip6_0, qos0);
}
else
{
ip4_0 = (vlib_buffer_get_current (b0) +
vnet_buffer (b0)->ip.save_rewrite_length);
if (PREDICT_FALSE (qos0 != ip4_0->tos))
{
ip4_0->tos = qos0;
ip4_0->checksum = ip4_header_checksum (ip4_0);
}
}
}
else if (QOS_SOURCE_MPLS == output_source)
{
mpls_bytes_0 = (vlib_buffer_get_current (b0) +
vnet_buffer (b0)->mpls.save_rewrite_length);
/* apply to all the labels in the stack */
do
{
/* clear out the old COS bts */
mpls_bytes_0[2] &= 0xf1;
/* OR in 3 bits of the mapped value */
mpls_bytes_0[2] |= (qos0 & 0x7) << 1;
eos0 = mpls_bytes_0[2] & 0x1;
mpls_bytes_0 += 4;
}
while (!eos0);
}
else if (QOS_SOURCE_VLAN == output_source)
{
vlan0 = (vlib_buffer_get_current (b0) +
sizeof (ethernet_header_t));
ethernet_vlan_header_set_priority_net_order (vlan0, qos0);
}
}
vnet_feature_next (&next0, b0);
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
qos_mark_trace_t *t =
vlib_add_trace (vm, node, b0, sizeof (*t));
t->bits = qos0;
t->input = input_source0;
t->used = (b0->flags & VNET_BUFFER_F_QOS_DATA_VALID);
}
/* verify speculative enqueue, maybe switch current next frame */
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;
}
/* packet trace format function */
static u8 *
format_qos_mark_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
qos_mark_trace_t *t = va_arg (*args, qos_mark_trace_t *);
s = format (s, "source:%U qos:%d used:%s",
format_qos_source, t->input, t->bits, (t->used ? "yes" : "no"));
return s;
}
VLIB_NODE_FN (ip4_qos_mark_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
return (qos_mark_inline (vm, node, frame, QOS_SOURCE_IP, 0));
}
VLIB_NODE_FN (ip6_qos_mark_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
return (qos_mark_inline (vm, node, frame, QOS_SOURCE_IP, 1));
}
VLIB_NODE_FN (mpls_qos_mark_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
return (qos_mark_inline (vm, node, frame, QOS_SOURCE_MPLS, 0));
}
VLIB_NODE_FN (vlan_mpls_qos_mark_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
return (qos_mark_inline (vm, node, frame, QOS_SOURCE_VLAN, 0));
}
VLIB_NODE_FN (vlan_ip4_qos_mark_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
return (qos_mark_inline (vm, node, frame, QOS_SOURCE_VLAN, 0));
}
VLIB_NODE_FN (vlan_ip6_qos_mark_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
return (qos_mark_inline (vm, node, frame, QOS_SOURCE_VLAN, 0));
}
VLIB_REGISTER_NODE (ip4_qos_mark_node) = {
.name = "ip4-qos-mark",
.vector_size = sizeof (u32),
.format_trace = format_qos_mark_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = 0,
.n_next_nodes = 1,
.next_nodes = {
[0] = "ip4-drop",
},
};
VNET_FEATURE_INIT (ip4_qos_mark_node, static) = {
.arc_name = "ip4-output",
.node_name = "ip4-qos-mark",
};
VLIB_REGISTER_NODE (ip6_qos_mark_node) = {
.name = "ip6-qos-mark",
.vector_size = sizeof (u32),
.format_trace = format_qos_mark_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = 0,
.n_next_nodes = 1,
.next_nodes = {
[0] = "ip6-drop",
},
};
VNET_FEATURE_INIT (ip6_qos_mark_node, static) = {
.arc_name = "ip6-output",
.node_name = "ip6-qos-mark",
};
VLIB_REGISTER_NODE (mpls_qos_mark_node) = {
.name = "mpls-qos-mark",
.vector_size = sizeof (u32),
.format_trace = format_qos_mark_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = 0,
.n_next_nodes = 1,
.next_nodes = {
[0] = "mpls-drop",
},
};
VNET_FEATURE_INIT (mpls_qos_mark_node, static) = {
.arc_name = "mpls-output",
.node_name = "mpls-qos-mark",
};
VLIB_REGISTER_NODE (vlan_ip4_qos_mark_node) = {
.name = "vlan-ip4-qos-mark",
.vector_size = sizeof (u32),
.format_trace = format_qos_mark_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = 0,
.n_next_nodes = 1,
.next_nodes = {
[0] = "error-drop",
},
};
VNET_FEATURE_INIT (vlan_ip4_qos_mark_node, static) = {
.arc_name = "ip4-output",
.node_name = "vlan-ip4-qos-mark",
.runs_after = VNET_FEATURES ("ip4-qos-mark"),
};
VLIB_REGISTER_NODE (vlan_ip6_qos_mark_node) = {
.name = "vlan-ip6-qos-mark",
.vector_size = sizeof (u32),
.format_trace = format_qos_mark_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = 0,
.n_next_nodes = 1,
.next_nodes = {
[0] = "error-drop",
},
};
VNET_FEATURE_INIT (vlan_ip6_qos_mark_node, static) = {
.arc_name = "ip6-output",
.node_name = "vlan-ip6-qos-mark",
.runs_after = VNET_FEATURES ("ip6-qos-mark"),
};
VLIB_REGISTER_NODE (vlan_mpls_qos_mark_node) = {
.name = "vlan-mpls-qos-mark",
.vector_size = sizeof (u32),
.format_trace = format_qos_mark_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = 0,
.n_next_nodes = 1,
.next_nodes = {
[0] = "error-drop",
},
};
VNET_FEATURE_INIT (vlan_mpls_qos_mark_node, static) = {
.arc_name = "mpls-output",
.node_name = "vlan-mpls-qos-mark",
.runs_after = VNET_FEATURES ("mpls-qos-mark"),
};
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/