summaryrefslogtreecommitdiffstats
path: root/VNFs/DPPD-PROX/handle_classify.c
blob: f4f96aaf9d368af3c719ac14722027c79963f7e6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
/*
// 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);
}