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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"
#include "mbuf_utils.h"
#include "handle_aggregator.h"
#define PRIORITY_DHCP (HIGH_PRIORITY)
#define TASK_STATS_ADD_DROP_TX_FAIL_PRIO(stats, ntx, prio) do { \
(stats)->drop_tx_fail_prio[prio] += ntx; \
} while(0)
#define TASK_STATS_ADD_TX_PRIO(stats, ntx, prio) do { \
(stats)->rx_prio[prio] += ntx; \
} while(0) \
static inline uint8_t detect_l4_priority(uint8_t l3_priority, const struct ipv4_hdr *ipv4_hdr)
{
if (ipv4_hdr->next_proto_id == IPPROTO_UDP) {
const struct udp_hdr *udp = (const struct udp_hdr *)((const uint8_t *)ipv4_hdr + sizeof(struct ipv4_hdr));
if (((udp->src_port == 0x67) && (udp->dst_port == 0x68)) || ((udp->src_port == 0x68) && (udp->dst_port == 0x67))) {
return PRIORITY_DHCP;
}
}
return l3_priority;
}
static inline uint8_t detect_l3_priority(uint8_t l2_priority, const struct ipv4_hdr *ipv4_hdr)
{
uint8_t dscp;
if ((ipv4_hdr->version_ihl >> 4) == 4) {
} else if ((ipv4_hdr->version_ihl >> 4) == 6) {
plog_warn("IPv6 Not implemented\n");
return OUT_DISCARD;
} else {
plog_warn("Unexpected IP version\n");
return OUT_DISCARD;
}
dscp = ipv4_hdr->type_of_service >> 2;
if (dscp)
return MAX_PRIORITIES - dscp - 1;
else
return l2_priority;
}
static inline uint8_t detect_l2_priority(const struct qinq_hdr *pqinq)
{
if (pqinq->cvlan.eth_proto != ETYPE_VLAN) {
plog_warn("Unexpected proto in QinQ = %#04x\n", pqinq->cvlan.eth_proto);
return OUT_DISCARD;
}
uint16_t svlan_priority = ntohs(pqinq->svlan.vlan_tci >> 13);
uint16_t cvlan_priority = ntohs(pqinq->cvlan.vlan_tci >> 13);
if (svlan_priority)
return svlan_priority;
else
return cvlan_priority;
}
static inline void buffer_packet(struct task_aggregator *task, struct rte_mbuf *mbuf, uint8_t priority)
{
struct task_base *tbase = (struct task_base *)task;
struct task_buffer *prio = &task->priority[priority];
if (prio->pkt_nb < BUFFER_LENGTH) {
prio->buffer[prio->pkt_pos] = mbuf;
prio->pkt_pos++;
if (prio->pkt_pos == BUFFER_LENGTH)
prio->pkt_pos = 0;
prio->pkt_nb++;
} else {
task->drop.buffer[task->drop.pkt_nb] = mbuf;
task->drop.pkt_nb++;
TASK_STATS_ADD_DROP_TX_FAIL_PRIO(&task->stats, 1, priority);
}
}
static inline void handle_aggregator(struct task_aggregator *task, struct rte_mbuf *mbuf)
{
struct ether_hdr *peth = rte_pktmbuf_mtod(mbuf, struct ether_hdr *);
uint8_t priority = 0;
const struct qinq_hdr *pqinq;
const struct ipv4_hdr *ipv4_hdr;
const uint16_t eth_type = peth->ether_type;
switch (eth_type) {
case ETYPE_MPLSU:
case ETYPE_MPLSM:
break;
case ETYPE_8021ad:
pqinq = rte_pktmbuf_mtod(mbuf, const struct qinq_hdr *);
if ((priority = detect_l2_priority(pqinq)) == OUT_DISCARD)
break;
ipv4_hdr = (const struct ipv4_hdr *)(pqinq + 1);
if ((priority = detect_l3_priority(priority, ipv4_hdr)) == OUT_DISCARD)
break;
if ((priority = detect_l4_priority(priority, ipv4_hdr)) == OUT_DISCARD)
break;
break;
case ETYPE_VLAN:
break;
case ETYPE_IPv4:
ipv4_hdr = (const struct ipv4_hdr *)(peth+1);
if ((priority = detect_l3_priority(LOW_PRIORITY, ipv4_hdr)) == OUT_DISCARD)
break;
if ((priority = detect_l4_priority(priority, ipv4_hdr)) == OUT_DISCARD)
break;
break;
case ETYPE_IPv6:
break;
case ETYPE_ARP:
break;
default:
break;
}
if (priority == OUT_DISCARD) {
task->drop.buffer[task->drop.pkt_nb] = mbuf;
task->drop.pkt_nb++;
return;
}
buffer_packet(task, mbuf, priority);
}
static int handle_aggregator_bulk(struct task_base *tbase, struct rte_mbuf **mbufs, uint16_t n_pkts)
{
struct task_aggregator *task = (struct task_aggregator *)tbase;
uint16_t j;
uint32_t drop_bytes = 0;
#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_aggregator(task, mbufs[j]);
}
#ifdef PROX_PREFETCH_OFFSET
prefetch_nta(rte_pktmbuf_mtod(mbufs[n_pkts - 1], void *));
for (; j < n_pkts; ++j) {
handle_aggregator(task, mbufs[j]);
}
#endif
for (int i = 0 ; i < task->drop.pkt_nb; i++) {
drop_bytes += mbuf_wire_size(task->drop.buffer[i]);
rte_pktmbuf_free(task->drop.buffer[i]);
}
TASK_STATS_ADD_DROP_TX_FAIL(&tbase->aux->stats, task->drop.pkt_nb);
TASK_STATS_ADD_DROP_BYTES(&tbase->aux->stats, drop_bytes);
task->drop.pkt_nb = 0;
for (int priority = 0; priority < MAX_PRIORITIES; priority++) {
struct task_buffer *prio = &task->priority[priority];
if (prio->pkt_nb) {
uint8_t n = 0;
if (prio->pkt_pos > prio->pkt_nb) {
struct rte_mbuf **buf = prio->buffer + prio->pkt_pos - prio->pkt_nb;
n = tbase->aux->tx_pkt_try(&task->base, buf, prio->pkt_nb);
} else {
struct rte_mbuf **buf = prio->buffer + BUFFER_LENGTH + prio->pkt_pos - prio->pkt_nb;
n = tbase->aux->tx_pkt_try(&task->base, buf, prio->pkt_nb - prio->pkt_pos);
if (n == (prio->pkt_nb - prio->pkt_pos))
n += tbase->aux->tx_pkt_try(&task->base, prio->buffer, prio->pkt_pos);
}
prio->pkt_nb -=n;
TASK_STATS_ADD_TX_PRIO(&task->stats, n, priority);
if (prio->pkt_nb)
break;
}
}
return 0;
}
static void init_task_aggregator(struct task_base *tbase, struct task_args *targ)
{
struct task_aggregator *task = (struct task_aggregator *)tbase;
const int socket_id = rte_lcore_to_socket_id(targ->lconf->id);
}
static struct task_init task_init_aggregator = {
.mode_str = "aggreg",
.init = init_task_aggregator,
.handle = handle_aggregator_bulk,
.flag_features = TASK_FEATURE_NEVER_DISCARDS,
.size = sizeof(struct task_aggregator)
};
__attribute__((constructor)) static void reg_task_aggregator(void)
{
reg_task(&task_init_aggregator);
}
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