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/*
// Copyright (c) 2010-2017 Intel Corporation
//
// 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 <rte_ip.h>
#include <stdio.h>
#include <string.h>
#include <rte_version.h>
#include "prox_lua.h"
#include "prox_lua_types.h"
#include "lconf.h"
#include "task_base.h"
#include "task_init.h"
#include "defines.h"
#include "prefetch.h"
#include "qinq.h"
#include "prox_cfg.h"
#include "log.h"
#include "quit.h"
#include "prox_shared.h"
struct task_classify {
struct task_base base;
uint16_t *user_table;
uint8_t *dscp;
};
static inline void handle_classify(struct task_classify *task, struct rte_mbuf *mbuf)
{
const struct qinq_hdr *pqinq = rte_pktmbuf_mtod(mbuf, const struct qinq_hdr *);
uint32_t qinq = PKT_TO_LUTQINQ(pqinq->svlan.vlan_tci, pqinq->cvlan.vlan_tci);
/* Traffic class can be set by ACL task. If this is the case,
don't overwrite it using dscp. Instead, use the
traffic class that had been set. */
uint32_t prev_tc;
#if RTE_VERSION >= RTE_VERSION_NUM(1,8,0,0)
uint32_t dummy;
rte_sched_port_pkt_read_tree_path(mbuf, &dummy, &dummy, &prev_tc, &dummy);
#else
struct rte_sched_port_hierarchy *sched = (struct rte_sched_port_hierarchy *) &mbuf->pkt.hash.sched;
prev_tc = sched->traffic_class;
#endif
const struct ipv4_hdr *ipv4_hdr = (const struct ipv4_hdr *)(pqinq + 1);
uint8_t dscp = task->dscp[ipv4_hdr->type_of_service >> 2];
uint8_t queue = dscp & 0x3;
uint8_t tc = prev_tc? prev_tc : dscp >> 2;
rte_sched_port_pkt_write(mbuf, 0, task->user_table[qinq], tc, queue, 0);
}
static int handle_classify_bulk(struct task_base *tbase, struct rte_mbuf **mbufs, uint16_t n_pkts)
{
struct task_classify *task = (struct task_classify *)tbase;
uint16_t j;
#ifdef PROX_PREFETCH_OFFSET
for (j = 0; j < PROX_PREFETCH_OFFSET && j < n_pkts; ++j) {
prefetch_nta(mbufs[j]);
}
for (j = 1; j < PROX_PREFETCH_OFFSET && j < n_pkts; ++j) {
prefetch_nta(rte_pktmbuf_mtod(mbufs[j - 1], void *));
}
#endif
for (j = 0; j + PREFETCH_OFFSET < n_pkts; ++j) {
#ifdef PROX_PREFETCH_OFFSET
prefetch_nta(mbufs[j + PREFETCH_OFFSET]);
prefetch_nta(rte_pktmbuf_mtod(mbufs[j + PREFETCH_OFFSET - 1], void *));
#endif
handle_classify(task, mbufs[j]);
}
#ifdef PROX_PREFETCH_OFFSET
prefetch_nta(rte_pktmbuf_mtod(mbufs[n_pkts - 1], void *));
for (; j < n_pkts; ++j) {
handle_classify(task, mbufs[j]);
}
#endif
return task->base.tx_pkt(&task->base, mbufs, n_pkts, NULL);
}
static void init_task_classify(struct task_base *tbase, struct task_args *targ)
{
struct task_classify *task = (struct task_classify *)tbase;
const int socket_id = rte_lcore_to_socket_id(targ->lconf->id);
task->user_table = prox_sh_find_socket(socket_id, "user_table");
if (!task->user_table) {
PROX_PANIC(!strcmp(targ->user_table, ""), "No user table defined\n");
int ret = lua_to_user_table(prox_lua(), GLOBAL, targ->user_table, socket_id, &task->user_table);
PROX_PANIC(ret, "Failed to create user table from config:\n%s\n", get_lua_to_errors());
prox_sh_add_socket(socket_id, "user_table", task->user_table);
}
PROX_PANIC(!strcmp(targ->dscp, ""), "DSCP table not specified\n");
task->dscp = prox_sh_find_socket(socket_id, targ->dscp);
if (!task->dscp) {
int ret = lua_to_dscp(prox_lua(), GLOBAL, targ->dscp, socket_id, &task->dscp);
PROX_PANIC(ret, "Failed to create dscp table from config\n");
prox_sh_add_socket(socket_id, targ->dscp, task->dscp);
}
}
static struct task_init task_init_classify = {
.mode_str = "classify",
.init = init_task_classify,
.handle = handle_classify_bulk,
.flag_features = TASK_FEATURE_NEVER_DISCARDS,
.size = sizeof(struct task_classify)
};
__attribute__((constructor)) static void reg_task_classify(void)
{
reg_task(&task_init_classify);
}
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