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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 <plugins/gbp/gbp_recirc.h>
#include <plugins/gbp/gbp_endpoint_group.h>
#include <plugins/gbp/gbp_endpoint.h>
#include <vnet/dpo/dvr_dpo.h>
#include <vnet/fib/fib_table.h>
/**
* Pool of GBP recircs
*/
gbp_recirc_t *gbp_recirc_pool;
/**
* Recirc configs keyed by sw_if_index
*/
index_t *gbp_recirc_db;
int
gbp_recirc_add (u32 sw_if_index, epg_id_t epg_id, u8 is_ext)
{
gbp_recirc_t *gr;
index_t gri;
vec_validate_init_empty (gbp_recirc_db, sw_if_index, INDEX_INVALID);
gri = gbp_recirc_db[sw_if_index];
if (INDEX_INVALID == gri)
{
gbp_endpoint_group_t *gepg;
fib_protocol_t fproto;
pool_get (gbp_recirc_pool, gr);
memset (gr, 0, sizeof (*gr));
gri = gr - gbp_recirc_pool;
gr->gr_epg = epg_id;
gr->gr_is_ext = is_ext;
gr->gr_sw_if_index = sw_if_index;
/*
* IP enable the recirc interface
*/
ip4_sw_interface_enable_disable (gr->gr_sw_if_index, 1);
ip6_sw_interface_enable_disable (gr->gr_sw_if_index, 1);
/*
* cache the FIB indicies of the EPG
*/
gepg = gbp_endpoint_group_find (gr->gr_epg);
if (NULL == gepg)
return (VNET_API_ERROR_NO_SUCH_ENTRY);
FOR_EACH_FIB_IP_PROTOCOL (fproto)
{
gr->gr_fib_index[fproto] = gepg->gepg_fib_index[fproto];
}
/*
* Packets on the recirculation interface are subjet to src-EPG
* classification. Recirc interfaces are L2-emulation mode.
* for internal EPGs this is via an LPM on all external subnets.
* for external EPGs this is via a port mapping.
*/
if (gr->gr_is_ext)
{
/*
* recirc is for post-NAT translation packets going into
* the external EPG, these are classified to the NAT EPG
* based on its port
*/
gbp_itf_epg_update (gr->gr_sw_if_index, gr->gr_epg, 0);
vnet_feature_enable_disable ("ip4-unicast",
"ip4-gbp-src-classify",
gr->gr_sw_if_index, 1, 0, 0);
vnet_feature_enable_disable ("ip6-unicast",
"ip6-gbp-src-classify",
gr->gr_sw_if_index, 1, 0, 0);
}
else
{
/*
* recirc is for pre-NAT translation packets coming from
* the external EPG, these are classified based on a LPM
* in the EPG's route-domain
*/
vnet_feature_enable_disable ("ip4-unicast",
"ip4-gbp-lpm-classify",
gr->gr_sw_if_index, 1, 0, 0);
vnet_feature_enable_disable ("ip6-unicast",
"ip6-gbp-lpm-classify",
gr->gr_sw_if_index, 1, 0, 0);
}
gbp_recirc_db[sw_if_index] = gri;
}
return (0);
}
void
gbp_recirc_delete (u32 sw_if_index)
{
gbp_recirc_t *gr;
index_t gri;
gri = gbp_recirc_db[sw_if_index];
if (INDEX_INVALID != gri)
{
gr = pool_elt_at_index (gbp_recirc_pool, gri);
if (gr->gr_is_ext)
{
gbp_itf_epg_delete (gr->gr_sw_if_index);
vnet_feature_enable_disable ("ip4-unicast",
"ip4-gbp-src-classify",
gr->gr_sw_if_index, 0, 0, 0);
vnet_feature_enable_disable ("ip6-unicast",
"ip6-gbp-src-classify",
gr->gr_sw_if_index, 0, 0, 0);
}
else
{
vnet_feature_enable_disable ("ip4-unicast",
"ip4-gbp-lpm-classify",
gr->gr_sw_if_index, 0, 0, 0);
vnet_feature_enable_disable ("ip6-unicast",
"ip6-gbp-lpm-classify",
gr->gr_sw_if_index, 0, 0, 0);
}
ip4_sw_interface_enable_disable (gr->gr_sw_if_index, 0);
ip6_sw_interface_enable_disable (gr->gr_sw_if_index, 0);
gbp_recirc_db[sw_if_index] = INDEX_INVALID;
pool_put (gbp_recirc_pool, gr);
}
}
void
gbp_recirc_walk (gbp_recirc_cb_t cb, void *ctx)
{
gbp_recirc_t *gbpe;
/* *INDENT-OFF* */
pool_foreach(gbpe, gbp_recirc_pool,
{
if (!cb(gbpe, ctx))
break;
});
/* *INDENT-ON* */
}
static int
gbp_recirc_show_one (gbp_recirc_t * gr, void *ctx)
{
vnet_main_t *vnm = vnet_get_main ();
vlib_main_t *vm;
vm = ctx;
vlib_cli_output (vm, " %U, epg:%d, ext:%d",
format_vnet_sw_if_index_name, vnm,
gr->gr_sw_if_index, gr->gr_epg, gr->gr_is_ext);
return (1);
}
static clib_error_t *
gbp_recirc_show (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
vlib_cli_output (vm, "Recirculation-Interfaces:");
gbp_recirc_walk (gbp_recirc_show_one, vm);
return (NULL);
}
/*?
* Show Group Based Policy Recircs and derived information
*
* @cliexpar
* @cliexstart{show gbp recirc}
* @cliexend
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (gbp_recirc_show_node, static) = {
.path = "show gbp recirc",
.short_help = "show gbp recirc\n",
.function = gbp_recirc_show,
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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