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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.
*/
/**
* @brief
* The data-path object representing receiveing the packet, i.e. it's for-us
*/
#include <vlib/vlib.h>
#include <vnet/ip/ip.h>
#include <vnet/dpo/receive_dpo.h>
/**
* @brief pool of all receive DPOs
*/
receive_dpo_t *receive_dpo_pool;
int
dpo_is_receive (const dpo_id_t *dpo)
{
return (dpo->dpoi_type == DPO_RECEIVE);
}
static receive_dpo_t *
receive_dpo_alloc (void)
{
receive_dpo_t *rd;
vlib_main_t *vm;
u8 did_barrier_sync;
dpo_pool_barrier_sync (vm, receive_dpo_pool, did_barrier_sync);
pool_get_aligned(receive_dpo_pool, rd, CLIB_CACHE_LINE_BYTES);
dpo_pool_barrier_release (vm, did_barrier_sync);
clib_memset(rd, 0, sizeof(*rd));
return (rd);
}
static receive_dpo_t *
receive_dpo_get_from_dpo (const dpo_id_t *dpo)
{
ASSERT(DPO_RECEIVE == dpo->dpoi_type);
return (receive_dpo_get(dpo->dpoi_index));
}
/*
* receive_dpo_add_or_lock
*
* The next_hop address here is used for source address selection in the DP.
* The local adj is added to an interface's receive prefix, the next-hop
* passed here is the local prefix on the same interface.
*/
void
receive_dpo_add_or_lock (dpo_proto_t proto,
u32 sw_if_index,
const ip46_address_t *nh_addr,
dpo_id_t *dpo)
{
receive_dpo_t *rd;
rd = receive_dpo_alloc();
rd->rd_sw_if_index = sw_if_index;
if (NULL != nh_addr)
{
rd->rd_addr = *nh_addr;
}
dpo_set(dpo, DPO_RECEIVE, proto, (rd - receive_dpo_pool));
}
static void
receive_dpo_lock (dpo_id_t *dpo)
{
receive_dpo_t *rd;
rd = receive_dpo_get_from_dpo(dpo);
rd->rd_locks++;
}
static void
receive_dpo_unlock (dpo_id_t *dpo)
{
receive_dpo_t *rd;
rd = receive_dpo_get_from_dpo(dpo);
rd->rd_locks--;
if (0 == rd->rd_locks)
{
pool_put(receive_dpo_pool, rd);
}
}
static u8*
format_receive_dpo (u8 *s, va_list *ap)
{
CLIB_UNUSED(index_t index) = va_arg(*ap, index_t);
CLIB_UNUSED(u32 indent) = va_arg(*ap, u32);
vnet_main_t * vnm = vnet_get_main();
receive_dpo_t *rd;
if (pool_is_free_index(receive_dpo_pool, index))
{
return (format(s, "dpo-receive DELETED"));
}
rd = receive_dpo_get(index);
if (~0 != rd->rd_sw_if_index)
{
return (format (s, "dpo-receive: %U on %U", format_ip46_address,
&rd->rd_addr, IP46_TYPE_ANY,
format_vnet_sw_if_index_name, vnm, rd->rd_sw_if_index));
}
else
{
return (format(s, "dpo-receive"));
}
}
static void
receive_dpo_mem_show (void)
{
fib_show_memory_usage("Receive",
pool_elts(receive_dpo_pool),
pool_len(receive_dpo_pool),
sizeof(receive_dpo_t));
}
const static dpo_vft_t receive_vft = {
.dv_lock = receive_dpo_lock,
.dv_unlock = receive_dpo_unlock,
.dv_format = format_receive_dpo,
.dv_mem_show = receive_dpo_mem_show,
};
/**
* @brief The per-protocol VLIB graph nodes that are assigned to a receive
* object.
*
* this means that these graph nodes are ones from which a receive is the
* parent object in the DPO-graph.
*/
const static char *const receive_ip4_nodes[] = {
"ip4-receive",
NULL,
};
const static char *const receive_ip6_nodes[] = {
"ip6-receive",
NULL,
};
const static char* const * const receive_nodes[DPO_PROTO_NUM] =
{
[DPO_PROTO_IP4] = receive_ip4_nodes,
[DPO_PROTO_IP6] = receive_ip6_nodes,
[DPO_PROTO_MPLS] = NULL,
};
void
receive_dpo_module_init (void)
{
dpo_register(DPO_RECEIVE, &receive_vft, receive_nodes);
}
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