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/*
* Copyright (c) 2016 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.
*/
/**
* @file
* @brief LISP sub-interfaces.
*
*/
#include <vnet/lisp-gpe/lisp_gpe_tenant.h>
#include <vnet/lisp-gpe/lisp_gpe_sub_interface.h>
#include <vnet/fib/fib_table.h>
#include <vnet/interface.h>
/**
* @brief Pool of all l3-sub-interfaces
*/
static lisp_gpe_sub_interface_t *lisp_gpe_sub_interface_pool;
/**
* A DB of all LISP L3 sub-interfaces. The key is:{VNI,l-RLOC}
*/
static uword *lisp_gpe_sub_interfaces;
/**
* A DB of all VNET L3 sub-interfaces. The key is:{VNI,l-RLOC}
* Used in the data-plane for interface lookup on decap.
*/
uword *lisp_gpe_sub_interfaces_sw_if_index;
/**
* The next available sub-interface ID. FIXME
*/
static u32 lisp_gpe_sub_interface_id;
static index_t
lisp_gpe_sub_interface_db_find (const ip_address_t * lrloc, u32 vni)
{
uword *p;
lisp_gpe_sub_interface_key_t key;
memset (&key, 0, sizeof (key));
ip_address_copy (&key.local_rloc, lrloc);
key.vni = vni;
p = hash_get_mem (lisp_gpe_sub_interfaces, &key);
if (NULL == p)
return (INDEX_INVALID);
else
return (p[0]);
}
static void
lisp_gpe_sub_interface_db_insert (const lisp_gpe_sub_interface_t * l3s)
{
hash_set_mem (lisp_gpe_sub_interfaces,
l3s->key, l3s - lisp_gpe_sub_interface_pool);
hash_set_mem (lisp_gpe_sub_interfaces_sw_if_index,
l3s->key, l3s->sw_if_index);
}
static void
lisp_gpe_sub_interface_db_remove (const lisp_gpe_sub_interface_t * l3s)
{
hash_unset_mem (lisp_gpe_sub_interfaces, l3s->key);
hash_unset_mem (lisp_gpe_sub_interfaces_sw_if_index, l3s->key);
}
lisp_gpe_sub_interface_t *
lisp_gpe_sub_interface_get_i (index_t l3si)
{
return (pool_elt_at_index (lisp_gpe_sub_interface_pool, l3si));
}
static void
lisp_gpe_sub_interface_set_table (u32 sw_if_index, u32 table_id)
{
fib_node_index_t fib_index;
fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, table_id,
FIB_SOURCE_LISP);
ASSERT (FIB_NODE_INDEX_INVALID != fib_index);
vec_validate (ip4_main.fib_index_by_sw_if_index, sw_if_index);
ip4_main.fib_index_by_sw_if_index[sw_if_index] = fib_index;
fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, table_id,
FIB_SOURCE_LISP);
ASSERT (FIB_NODE_INDEX_INVALID != fib_index);
vec_validate (ip6_main.fib_index_by_sw_if_index, sw_if_index);
ip6_main.fib_index_by_sw_if_index[sw_if_index] = fib_index;
}
static void
lisp_gpe_sub_interface_unset_table (u32 sw_if_index, u32 table_id)
{
fib_table_unlock (ip4_main.fib_index_by_sw_if_index[sw_if_index],
FIB_PROTOCOL_IP4, FIB_SOURCE_LISP);
ip4_main.fib_index_by_sw_if_index[sw_if_index] = 0;
ip4_sw_interface_enable_disable (sw_if_index, 0);
fib_table_unlock (ip6_main.fib_index_by_sw_if_index[sw_if_index],
FIB_PROTOCOL_IP6, FIB_SOURCE_LISP);
ip6_main.fib_index_by_sw_if_index[sw_if_index] = 0;
ip6_sw_interface_enable_disable (sw_if_index, 0);
}
index_t
lisp_gpe_sub_interface_find_or_create_and_lock (const ip_address_t * lrloc,
u32 overlay_table_id, u32 vni)
{
lisp_gpe_sub_interface_t *l3s;
index_t l3si;
l3si = lisp_gpe_sub_interface_db_find (lrloc, vni);
if (INDEX_INVALID == l3si)
{
u32 main_sw_if_index, sub_sw_if_index;
/*
* find the main interface from the VNI
*/
main_sw_if_index =
lisp_gpe_tenant_l3_iface_add_or_lock (vni, overlay_table_id);
vnet_sw_interface_t sub_itf_template = {
.type = VNET_SW_INTERFACE_TYPE_SUB,
.flood_class = VNET_FLOOD_CLASS_NORMAL,
.sup_sw_if_index = main_sw_if_index,
.sub.id = lisp_gpe_sub_interface_id++,
};
if (NULL != vnet_create_sw_interface (vnet_get_main (),
&sub_itf_template,
&sub_sw_if_index))
return (INDEX_INVALID);
pool_get (lisp_gpe_sub_interface_pool, l3s);
memset (l3s, 0, sizeof (*l3s));
l3s->key = clib_mem_alloc (sizeof (*l3s->key));
memset (l3s->key, 0, sizeof (*l3s->key));
ip_address_copy (&l3s->key->local_rloc, lrloc);
l3s->key->vni = vni;
l3s->main_sw_if_index = main_sw_if_index;
l3s->sw_if_index = sub_sw_if_index;
l3s->eid_table_id = overlay_table_id;
l3si = (l3s - lisp_gpe_sub_interface_pool);
// FIXME. enable When we get an adj
ip6_sw_interface_enable_disable (l3s->sw_if_index, 1);
ip4_sw_interface_enable_disable (l3s->sw_if_index, 1);
vnet_sw_interface_set_flags (vnet_get_main (),
l3s->sw_if_index,
VNET_SW_INTERFACE_FLAG_ADMIN_UP);
lisp_gpe_sub_interface_db_insert (l3s);
}
else
{
l3s = lisp_gpe_sub_interface_get_i (l3si);
l3s->eid_table_id = overlay_table_id;
}
lisp_gpe_sub_interface_set_table (l3s->sw_if_index, l3s->eid_table_id);
l3s->locks++;
return (l3si);
}
void
lisp_gpe_sub_interface_unlock (index_t l3si)
{
lisp_gpe_sub_interface_t *l3s;
l3s = lisp_gpe_sub_interface_get_i (l3si);
ASSERT (0 != l3s->locks);
l3s->locks--;
if (0 == l3s->locks)
{
lisp_gpe_sub_interface_unset_table (l3s->sw_if_index,
l3s->eid_table_id);
lisp_gpe_tenant_l3_iface_unlock (l3s->key->vni);
vnet_sw_interface_set_flags (vnet_get_main (), l3s->sw_if_index, 0);
vnet_delete_sub_interface (l3s->sw_if_index);
lisp_gpe_sub_interface_db_remove (l3s);
clib_mem_free (l3s->key);
pool_put (lisp_gpe_sub_interface_pool, l3s);
}
}
const lisp_gpe_sub_interface_t *
lisp_gpe_sub_interface_get (index_t l3si)
{
return (lisp_gpe_sub_interface_get_i (l3si));
}
u8 *
format_lisp_gpe_sub_interface (u8 * s, va_list ap)
{
lisp_gpe_sub_interface_t *l3s = va_arg (ap, lisp_gpe_sub_interface_t *);
vnet_main_t *vnm = vnet_get_main ();
s = format (s, "%-16U",
format_vnet_sw_interface_name,
vnm, vnet_get_sw_interface (vnm, l3s->sw_if_index));
s = format (s, "%=8d", l3s->key->vni);
s = format (s, "%=15d", l3s->sw_if_index);
s = format (s, "%U", format_ip_address, &l3s->key->local_rloc);
return (s);
}
/** CLI command to show LISP-GPE interfaces. */
static clib_error_t *
lisp_gpe_sub_interface_show (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
lisp_gpe_sub_interface_t *l3s;
vlib_cli_output (vm, "%-16s%=8s%=15s%s", "Name", "VNI", "sw_if_index",
"local RLOC");
/* *INDENT-OFF* */
pool_foreach (l3s, lisp_gpe_sub_interface_pool,
({
vlib_cli_output (vm, "%U", format_lisp_gpe_sub_interface, l3s);
}));
/* *INDENT-ON* */
return 0;
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (lisp_gpe_sub_interface_command) = {
.path = "show gpe sub-interface",
.short_help = "show gpe sub-interface",
.function = lisp_gpe_sub_interface_show,
};
/* *INDENT-ON* */
static clib_error_t *
lisp_gpe_sub_interface_module_init (vlib_main_t * vm)
{
lisp_gpe_sub_interfaces =
hash_create_mem (0,
sizeof (lisp_gpe_sub_interface_key_t), sizeof (uword));
lisp_gpe_sub_interfaces_sw_if_index =
hash_create_mem (0,
sizeof (lisp_gpe_sub_interface_key_t), sizeof (uword));
return (NULL);
}
VLIB_INIT_FUNCTION (lisp_gpe_sub_interface_module_init);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/