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/*
* Copyright (c) 2017-2019 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 "data_pcslookup.h"
#include "mgmt.h"
#include "parser.h"
#include "infra.h"
#include "strategy.h"
#include "strategy_dpo_manager.h"
#include "state.h"
/* Stats string values */
static char *hicn_data_pcslookup_error_strings[] = {
#define _(sym, string) string,
foreach_hicnfwd_error
#undef _
};
/* packet trace format function */
always_inline u8 *hicn_data_pcslookup_format_trace (u8 * s, va_list * args);
vlib_node_registration_t hicn_data_pcslookup_node;
/*
* hICN node for handling data. It performs a lookup in the PIT.
*/
static uword
hicn_data_pcslookup_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
u32 n_left_from, *from, *to_next;
hicn_data_pcslookup_next_t next_index;
hicn_data_pcslookup_runtime_t *rt;
vl_api_hicn_api_node_stats_get_reply_t stats = { 0 };
rt = vlib_node_get_runtime_data (vm, node->node_index);
if (PREDICT_FALSE (rt->pitcs == NULL))
{
rt->pitcs = &hicn_main.pitcs;
}
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
while (n_left_from > 0)
{
u32 n_left_to_next;
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
vlib_buffer_t *b0;
hicn_buffer_t *hb0;
u8 isv6;
u8 *nameptr;
u16 namelen;
u32 bi0;
u32 next0 = HICN_DATA_PCSLOOKUP_NEXT_ERROR_DROP;
u64 name_hash = 0;
hicn_name_t name;
hicn_header_t *hicn0 = NULL;
u32 node_id0 = 0;
u8 dpo_ctx_id0 = 0;
int ret0;
u8 vft_id0;
u8 is_cs0;
u8 hash_entry_id = 0;
u8 bucket_is_overflown = 0;
u32 bucket_id = ~0;
/* Prefetch for next iteration. */
if (n_left_from > 1)
{
vlib_buffer_t *b1;
b1 = vlib_get_buffer (vm, from[1]);
//Prefetch two cache lines-- 128 byte-- so that we load the hicn_buffer_t as well
CLIB_PREFETCH (b1, 2 * CLIB_CACHE_LINE_BYTES, STORE);
CLIB_PREFETCH (b1->data, CLIB_CACHE_LINE_BYTES, LOAD);
}
/* Dequeue a packet buffer */
bi0 = from[0];
from += 1;
n_left_from -= 1;
to_next[0] = bi0;
to_next += 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
hb0 = hicn_get_buffer (b0);
/* Incr packet counter */
stats.pkts_processed += 1;
ret0 = hicn_data_parse_pkt (b0, &name, &namelen, &hicn0, &isv6);
if (PREDICT_TRUE (ret0 == HICN_ERROR_NONE))
{
next0 =
isv6 ? HICN_DATA_PCSLOOKUP_NEXT_V6_LOOKUP :
HICN_DATA_PCSLOOKUP_NEXT_V4_LOOKUP;
}
nameptr = (u8 *) (&name);
if (PREDICT_FALSE
(ret0 != HICN_ERROR_NONE
|| hicn_hashtb_fullhash (nameptr, namelen,
&name_hash) != HICN_ERROR_NONE))
{
next0 = HICN_DATA_PCSLOOKUP_NEXT_ERROR_DROP;
}
else
{
int res =
hicn_hashtb_lookup_node (rt->pitcs->pcs_table, nameptr,
namelen, name_hash,
!(hb0->flags &
HICN_BUFFER_FLAGS_FACE_IS_APP)
/* take lock */ ,
&node_id0, &dpo_ctx_id0, &vft_id0,
&is_cs0,
&hash_entry_id, &bucket_id,
&bucket_is_overflown);
stats.pkts_data_count += 1;
if ((res == HICN_ERROR_HASHTB_HASH_NOT_FOUND
|| (res == HICN_ERROR_NONE && is_cs0))
&& (hb0->flags & HICN_BUFFER_FLAGS_FACE_IS_APP))
{
next0 = HICN_DATA_PCSLOOKUP_NEXT_STORE_DATA;
}
else if (res == HICN_ERROR_NONE)
{
/*
* In case the result of the lookup
* is a CS entry, the packet is
* dropped
*/
next0 = HICN_DATA_PCSLOOKUP_NEXT_DATA_FWD + is_cs0;
}
}
hicn_store_internal_state (b0, name_hash, node_id0, dpo_ctx_id0,
vft_id0, hash_entry_id, bucket_id,
bucket_is_overflown);
/*
* Verify speculative enqueue, maybe switch current
* next frame
*/
/*
* Fix in case of a wrong speculation. Needed to
* clone the data in the right frame
*/
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next,
bi0, next0);
/* Maybe trace */
if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
(b0->flags & VLIB_BUFFER_IS_TRACED)))
{
hicn_data_pcslookup_trace_t *t =
vlib_add_trace (vm, node, b0, sizeof (*t));
t->pkt_type = HICN_PKT_TYPE_CONTENT;
t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
t->next_index = next0;
}
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
/* Check the CS LRU, and trim if necessary. */
u32 pit_int_count = hicn_pit_get_int_count (rt->pitcs);
u32 pit_cs_count = hicn_pit_get_cs_count (rt->pitcs);
vlib_node_increment_counter (vm, hicn_data_pcslookup_node.index,
HICNFWD_ERROR_PROCESSED, stats.pkts_processed);
vlib_node_increment_counter (vm, hicn_data_pcslookup_node.index,
HICNFWD_ERROR_DATAS, stats.pkts_data_count);
update_node_counter (vm, hicn_data_pcslookup_node.index,
HICNFWD_ERROR_INT_COUNT, pit_int_count);
update_node_counter (vm, hicn_data_pcslookup_node.index,
HICNFWD_ERROR_CS_COUNT, pit_cs_count);
return (frame->n_vectors);
}
/* packet trace format function */
static u8 *
hicn_data_pcslookup_format_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
hicn_data_pcslookup_trace_t *t =
va_arg (*args, hicn_data_pcslookup_trace_t *);
s = format (s, "DATA-PCSLOOKUP: pkt: %d, sw_if_index %d, next index %d",
(int) t->pkt_type, t->sw_if_index, t->next_index);
return (s);
}
/*
* Node registration for the data forwarder node
*/
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (hicn_data_pcslookup_node) =
{
.function = hicn_data_pcslookup_node_fn,
.name = "hicn-data-pcslookup",
.vector_size = sizeof (u32),
.runtime_data_bytes = sizeof (hicn_data_pcslookup_runtime_t),
.format_trace = hicn_data_pcslookup_format_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN (hicn_data_pcslookup_error_strings),
.error_strings = hicn_data_pcslookup_error_strings,
.n_next_nodes = HICN_DATA_PCSLOOKUP_N_NEXT,
.next_nodes =
{
[HICN_DATA_PCSLOOKUP_NEXT_V4_LOOKUP] = "ip4-lookup",
[HICN_DATA_PCSLOOKUP_NEXT_V6_LOOKUP] = "ip6-lookup",
[HICN_DATA_PCSLOOKUP_NEXT_STORE_DATA] = "hicn-data-push",
[HICN_DATA_PCSLOOKUP_NEXT_DATA_FWD] = "hicn-data-fwd",
[HICN_DATA_PCSLOOKUP_NEXT_ERROR_DROP] = "error-drop",
},
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables: eval: (c-set-style "gnu") End:
*/
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