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/*
* Copyright (c) 2018 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/qos/qos_record.h>
#include <vnet/ip/ip.h>
#include <vnet/ip/ip6_to_ip4.h>
#include <vnet/feature/feature.h>
#include <vnet/qos/qos_types.h>
#include <vnet/l2/l2_input.h>
#include <vnet/l2/feat_bitmap.h>
/**
* Per-interface, per-protocol vector of feature on/off configurations
*/
u8 *qos_record_configs[QOS_N_SOURCES];
u32 l2_qos_input_next[QOS_N_SOURCES][32];
static void
qos_record_feature_config (u32 sw_if_index,
qos_source_t input_source, u8 enable)
{
switch (input_source)
{
case QOS_SOURCE_IP:
vnet_feature_enable_disable ("ip6-unicast", "ip6-qos-record",
sw_if_index, enable, NULL, 0);
vnet_feature_enable_disable ("ip6-multicast", "ip6-qos-record",
sw_if_index, enable, NULL, 0);
vnet_feature_enable_disable ("ip4-unicast", "ip4-qos-record",
sw_if_index, enable, NULL, 0);
vnet_feature_enable_disable ("ip4-multicast", "ip4-qos-record",
sw_if_index, enable, NULL, 0);
l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_L2_IP_QOS_RECORD,
enable);
break;
case QOS_SOURCE_MPLS:
vnet_feature_enable_disable ("mpls-input", "mpls-qos-record",
sw_if_index, enable, NULL, 0);
break;
case QOS_SOURCE_VLAN:
vnet_feature_enable_disable ("ip6-unicast", "vlan-ip6-qos-record",
sw_if_index, enable, NULL, 0);
vnet_feature_enable_disable ("ip6-multicast", "vlan-ip6-qos-record",
sw_if_index, enable, NULL, 0);
vnet_feature_enable_disable ("ip4-unicast", "vlan-ip4-qos-record",
sw_if_index, enable, NULL, 0);
vnet_feature_enable_disable ("ip4-multicast", "vlan-ip4-qos-record",
sw_if_index, enable, NULL, 0);
vnet_feature_enable_disable ("mpls-input", "vlan-mpls-qos-record",
sw_if_index, enable, NULL, 0);
break;
case QOS_SOURCE_EXT:
/* not a valid option for recording */
break;
}
}
int
qos_record_enable (u32 sw_if_index, qos_source_t input_source)
{
vec_validate (qos_record_configs[input_source], sw_if_index);
if (0 == qos_record_configs[input_source][sw_if_index])
{
qos_record_feature_config (sw_if_index, input_source, 1);
}
qos_record_configs[input_source][sw_if_index]++;
return (0);
}
int
qos_record_disable (u32 sw_if_index, qos_source_t input_source)
{
if (vec_len (qos_record_configs[input_source]) <= sw_if_index)
return VNET_API_ERROR_NO_MATCHING_INTERFACE;
if (0 == qos_record_configs[input_source][sw_if_index])
return VNET_API_ERROR_VALUE_EXIST;
qos_record_configs[input_source][sw_if_index]--;
if (0 == qos_record_configs[input_source][sw_if_index])
{
qos_record_feature_config (sw_if_index, input_source, 0);
}
return (0);
}
/*
* Disable recording feature for all protocols when the interface
* is deleted
*/
static clib_error_t *
qos_record_ip_interface_add_del (vnet_main_t * vnm,
u32 sw_if_index, u32 is_add)
{
if (!is_add)
{
qos_source_t qs;
FOR_EACH_QOS_SOURCE (qs)
{
while (qos_record_disable (sw_if_index, qs) == 0);
}
}
return (NULL);
}
VNET_SW_INTERFACE_ADD_DEL_FUNCTION (qos_record_ip_interface_add_del);
clib_error_t *
l2_ip_qos_init (vlib_main_t * vm)
{
qos_source_t qs;
vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "l2-ip-qos-record");
/* Initialize the feature next-node indexes */
FOR_EACH_QOS_SOURCE (qs)
feat_bitmap_init_next_nodes (vm,
node->index,
L2INPUT_N_FEAT,
l2input_get_feat_names (),
l2_qos_input_next[qs]);
return 0;
}
VLIB_INIT_FUNCTION (l2_ip_qos_init);
static clib_error_t *
qos_record_cli (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
vnet_main_t *vnm = vnet_get_main ();
u32 sw_if_index, qs;
u8 enable;
qs = 0xff;
enable = 1;
sw_if_index = ~0;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "%U", unformat_vnet_sw_interface,
vnm, &sw_if_index))
;
else if (unformat (input, "%U", unformat_qos_source, &qs))
;
else if (unformat (input, "enable"))
enable = 1;
else if (unformat (input, "disable"))
enable = 0;
else
break;
}
if (~0 == sw_if_index)
return clib_error_return (0, "interface must be specified");
if (0xff == qs)
return clib_error_return (0, "input location must be specified");
if (enable)
qos_record_enable (sw_if_index, qs);
else
qos_record_disable (sw_if_index, qs);
return (NULL);
}
/*?
* Enable QoS bit recording on an interface using the packet's input DSCP bits
* Which input QoS bits to use are either; IP, MPLS or VLAN. If more than
* one protocol is chosen (which is foolish) the higher layers override the
* lower.
*
* @cliexpar
* @cliexcmd{qos record ip GigEthernet0/1/0}
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (qos_record_command, static) = {
.path = "qos record",
.short_help = "qos record <record-source> <INTERFACE> [disable]",
.function = qos_record_cli,
.is_mp_safe = 1,
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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