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/*
* gbp.h : Group Based Policy
*
* 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_endpoint_group.h>
#include <plugins/gbp/gbp_endpoint.h>
#include <vnet/dpo/dvr_dpo.h>
#include <vnet/fib/fib_table.h>
#include <vnet/l2/l2_input.h>
#include <vnet/l2/feat_bitmap.h>
/**
* Pool of GBP endpoint_groups
*/
gbp_endpoint_group_t *gbp_endpoint_group_pool;
/**
* DB of endpoint_groups
*/
gbp_endpoint_group_db_t gbp_endpoint_group_db;
gbp_endpoint_group_t *
gbp_endpoint_group_find (epg_id_t epg_id)
{
uword *p;
p = hash_get (gbp_endpoint_group_db.gepg_hash, epg_id);
if (NULL != p)
return (pool_elt_at_index (gbp_endpoint_group_pool, p[0]));
return (NULL);
}
int
gbp_endpoint_group_add (epg_id_t epg_id,
u32 bd_id,
u32 ip4_table_id,
u32 ip6_table_id, u32 uplink_sw_if_index)
{
gbp_endpoint_group_t *gepg;
gepg = gbp_endpoint_group_find (epg_id);
if (NULL == gepg)
{
fib_protocol_t fproto;
pool_get (gbp_endpoint_group_pool, gepg);
memset (gepg, 0, sizeof (*gepg));
gepg->gepg_id = epg_id;
gepg->gepg_bd = bd_id;
gepg->gepg_rd[FIB_PROTOCOL_IP4] = ip4_table_id;
gepg->gepg_rd[FIB_PROTOCOL_IP6] = ip6_table_id;
gepg->gepg_uplink_sw_if_index = uplink_sw_if_index;
/*
* an egress DVR dpo for internal subnets to use when sending
* on the uplink interface
*/
FOR_EACH_FIB_IP_PROTOCOL (fproto)
{
gepg->gepg_fib_index[fproto] =
fib_table_find_or_create_and_lock (fproto,
gepg->gepg_rd[fproto],
FIB_SOURCE_PLUGIN_HI);
if (~0 == gepg->gepg_fib_index[fproto])
{
return (VNET_API_ERROR_NO_SUCH_FIB);
}
dvr_dpo_add_or_lock (uplink_sw_if_index,
fib_proto_to_dpo (fproto),
&gepg->gepg_dpo[fproto]);
}
/*
* packets direct from the uplink have had policy applied
*/
l2input_intf_bitmap_enable (gepg->gepg_uplink_sw_if_index,
L2INPUT_FEAT_GBP_NULL_CLASSIFY, 1);
hash_set (gbp_endpoint_group_db.gepg_hash,
gepg->gepg_id, gepg - gbp_endpoint_group_pool);
}
return (0);
}
void
gbp_endpoint_group_delete (epg_id_t epg_id)
{
gbp_endpoint_group_t *gepg;
uword *p;
p = hash_get (gbp_endpoint_group_db.gepg_hash, epg_id);
if (NULL != p)
{
fib_protocol_t fproto;
gepg = pool_elt_at_index (gbp_endpoint_group_pool, p[0]);
l2input_intf_bitmap_enable (gepg->gepg_uplink_sw_if_index,
L2INPUT_FEAT_GBP_NULL_CLASSIFY, 0);
FOR_EACH_FIB_IP_PROTOCOL (fproto)
{
dpo_reset (&gepg->gepg_dpo[fproto]);
fib_table_unlock (gepg->gepg_fib_index[fproto],
fproto, FIB_SOURCE_PLUGIN_HI);
}
hash_unset (gbp_endpoint_group_db.gepg_hash, epg_id);
pool_put (gbp_endpoint_group_pool, gepg);
}
}
void
gbp_endpoint_group_walk (gbp_endpoint_group_cb_t cb, void *ctx)
{
gbp_endpoint_group_t *gbpe;
/* *INDENT-OFF* */
pool_foreach(gbpe, gbp_endpoint_group_pool,
{
if (!cb(gbpe, ctx))
break;
});
/* *INDENT-ON* */
}
static clib_error_t *
gbp_endpoint_group_cli (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
vnet_main_t *vnm = vnet_get_main ();
epg_id_t epg_id = EPG_INVALID;
u32 uplink_sw_if_index = ~0;
u32 bd_id = ~0;
u32 rd_id = ~0;
u8 add = 1;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "%U", unformat_vnet_sw_interface,
vnm, &uplink_sw_if_index))
;
else if (unformat (input, "add"))
add = 1;
else if (unformat (input, "del"))
add = 0;
else if (unformat (input, "epg %d", &epg_id))
;
else if (unformat (input, "bd %d", &bd_id))
;
else if (unformat (input, "rd %d", &rd_id))
;
else
break;
}
if (EPG_INVALID == epg_id)
return clib_error_return (0, "EPG-ID must be specified");
if (add)
{
if (~0 == uplink_sw_if_index)
return clib_error_return (0, "interface must be specified");
if (~0 == bd_id)
return clib_error_return (0, "Bridge-domain must be specified");
if (~0 == rd_id)
return clib_error_return (0, "route-domain must be specified");
gbp_endpoint_group_add (epg_id, bd_id, rd_id, rd_id,
uplink_sw_if_index);
}
else
gbp_endpoint_group_delete (epg_id);
return (NULL);
}
/*?
* Configure a GBP Endpoint Group
*
* @cliexpar
* @cliexstart{set gbp endpoint-group [del] epg <ID> bd <ID> <interface>}
* @cliexend
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (gbp_endpoint_group_cli_node, static) = {
.path = "gbp endpoint-group",
.short_help = "gbp endpoint-group [del] epg <ID> bd <ID> <interface>",
.function = gbp_endpoint_group_cli,
};
static int
gbp_endpoint_group_show_one (gbp_endpoint_group_t *gepg, void *ctx)
{
vnet_main_t *vnm = vnet_get_main ();
vlib_main_t *vm;
vm = ctx;
vlib_cli_output (vm, " %d, bd:%d, ip4:%d ip6:%d uplink:%U",
gepg->gepg_id,
gepg->gepg_bd,
gepg->gepg_rd[FIB_PROTOCOL_IP4],
gepg->gepg_rd[FIB_PROTOCOL_IP6],
format_vnet_sw_if_index_name, vnm, gepg->gepg_uplink_sw_if_index);
return (1);
}
static clib_error_t *
gbp_endpoint_group_show (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
vlib_cli_output (vm, "Endpoint-Groups:");
gbp_endpoint_group_walk (gbp_endpoint_group_show_one, vm);
return (NULL);
}
/*?
* Show Group Based Policy Endpoint_Groups and derived information
*
* @cliexpar
* @cliexstart{show gbp endpoint_group}
* @cliexend
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (gbp_endpoint_group_show_node, static) = {
.path = "show gbp endpoint-group",
.short_help = "show gbp endpoint-group\n",
.function = gbp_endpoint_group_show,
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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