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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
|
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(C) 2020 Marvell International Ltd.
*/
#include <rte_debug.h>
#include <rte_ethdev.h>
#include <rte_ether.h>
#include <rte_graph.h>
#include <rte_graph_worker.h>
#include <rte_ip.h>
#include <rte_malloc.h>
#include <rte_mbuf.h>
#include <rte_tcp.h>
#include <rte_udp.h>
#include <rte_vect.h>
#include "rte_node_ip4_api.h"
#include "ip4_rewrite_priv.h"
#include "node_private.h"
static struct ip4_rewrite_node_main *ip4_rewrite_nm;
static uint16_t
ip4_rewrite_node_process(struct rte_graph *graph, struct rte_node *node,
void **objs, uint16_t nb_objs)
{
struct rte_mbuf *mbuf0, *mbuf1, *mbuf2, *mbuf3, **pkts;
struct ip4_rewrite_nh_header *nh = ip4_rewrite_nm->nh;
uint16_t next0, next1, next2, next3, next_index;
struct rte_ipv4_hdr *ip0, *ip1, *ip2, *ip3;
uint16_t n_left_from, held = 0, last_spec = 0;
void *d0, *d1, *d2, *d3;
void **to_next, **from;
rte_xmm_t priv01;
rte_xmm_t priv23;
int i;
/* Speculative next as last next */
next_index = *(uint16_t *)node->ctx;
rte_prefetch0(nh);
pkts = (struct rte_mbuf **)objs;
from = objs;
n_left_from = nb_objs;
for (i = 0; i < 4 && i < n_left_from; i++)
rte_prefetch0(pkts[i]);
/* Get stream for the speculated next node */
to_next = rte_node_next_stream_get(graph, node, next_index, nb_objs);
/* Update Ethernet header of pkts */
while (n_left_from >= 4) {
if (likely(n_left_from > 7)) {
/* Prefetch only next-mbuf struct and priv area.
* Data need not be prefetched as we only write.
*/
rte_prefetch0(pkts[4]);
rte_prefetch0(pkts[5]);
rte_prefetch0(pkts[6]);
rte_prefetch0(pkts[7]);
}
mbuf0 = pkts[0];
mbuf1 = pkts[1];
mbuf2 = pkts[2];
mbuf3 = pkts[3];
pkts += 4;
n_left_from -= 4;
priv01.u64[0] = node_mbuf_priv1(mbuf0)->u;
priv01.u64[1] = node_mbuf_priv1(mbuf1)->u;
priv23.u64[0] = node_mbuf_priv1(mbuf2)->u;
priv23.u64[1] = node_mbuf_priv1(mbuf3)->u;
/* Increment checksum by one. */
priv01.u32[1] += rte_cpu_to_be_16(0x0100);
priv01.u32[3] += rte_cpu_to_be_16(0x0100);
priv23.u32[1] += rte_cpu_to_be_16(0x0100);
priv23.u32[3] += rte_cpu_to_be_16(0x0100);
/* Update ttl,cksum rewrite ethernet hdr on mbuf0 */
d0 = rte_pktmbuf_mtod(mbuf0, void *);
rte_memcpy(d0, nh[priv01.u16[0]].rewrite_data,
nh[priv01.u16[0]].rewrite_len);
next0 = nh[priv01.u16[0]].tx_node;
ip0 = (struct rte_ipv4_hdr *)((uint8_t *)d0 +
sizeof(struct rte_ether_hdr));
ip0->time_to_live = priv01.u16[1] - 1;
ip0->hdr_checksum = priv01.u16[2] + priv01.u16[3];
/* Update ttl,cksum rewrite ethernet hdr on mbuf1 */
d1 = rte_pktmbuf_mtod(mbuf1, void *);
rte_memcpy(d1, nh[priv01.u16[4]].rewrite_data,
nh[priv01.u16[4]].rewrite_len);
next1 = nh[priv01.u16[4]].tx_node;
ip1 = (struct rte_ipv4_hdr *)((uint8_t *)d1 +
sizeof(struct rte_ether_hdr));
ip1->time_to_live = priv01.u16[5] - 1;
ip1->hdr_checksum = priv01.u16[6] + priv01.u16[7];
/* Update ttl,cksum rewrite ethernet hdr on mbuf2 */
d2 = rte_pktmbuf_mtod(mbuf2, void *);
rte_memcpy(d2, nh[priv23.u16[0]].rewrite_data,
nh[priv23.u16[0]].rewrite_len);
next2 = nh[priv23.u16[0]].tx_node;
ip2 = (struct rte_ipv4_hdr *)((uint8_t *)d2 +
sizeof(struct rte_ether_hdr));
ip2->time_to_live = priv23.u16[1] - 1;
ip2->hdr_checksum = priv23.u16[2] + priv23.u16[3];
/* Update ttl,cksum rewrite ethernet hdr on mbuf3 */
d3 = rte_pktmbuf_mtod(mbuf3, void *);
rte_memcpy(d3, nh[priv23.u16[4]].rewrite_data,
nh[priv23.u16[4]].rewrite_len);
next3 = nh[priv23.u16[4]].tx_node;
ip3 = (struct rte_ipv4_hdr *)((uint8_t *)d3 +
sizeof(struct rte_ether_hdr));
ip3->time_to_live = priv23.u16[5] - 1;
ip3->hdr_checksum = priv23.u16[6] + priv23.u16[7];
/* Enqueue four to next node */
rte_edge_t fix_spec =
((next_index == next0) && (next0 == next1) &&
(next1 == next2) && (next2 == next3));
if (unlikely(fix_spec == 0)) {
/* Copy things successfully speculated till now */
rte_memcpy(to_next, from, last_spec * sizeof(from[0]));
from += last_spec;
to_next += last_spec;
held += last_spec;
last_spec = 0;
/* next0 */
if (next_index == next0) {
to_next[0] = from[0];
to_next++;
held++;
} else {
rte_node_enqueue_x1(graph, node, next0,
from[0]);
}
/* next1 */
if (next_index == next1) {
to_next[0] = from[1];
to_next++;
held++;
} else {
rte_node_enqueue_x1(graph, node, next1,
from[1]);
}
/* next2 */
if (next_index == next2) {
to_next[0] = from[2];
to_next++;
held++;
} else {
rte_node_enqueue_x1(graph, node, next2,
from[2]);
}
/* next3 */
if (next_index == next3) {
to_next[0] = from[3];
to_next++;
held++;
} else {
rte_node_enqueue_x1(graph, node, next3,
from[3]);
}
from += 4;
/* Change speculation if last two are same */
if ((next_index != next3) && (next2 == next3)) {
/* Put the current speculated node */
rte_node_next_stream_put(graph, node,
next_index, held);
held = 0;
/* Get next speculated stream */
next_index = next3;
to_next = rte_node_next_stream_get(
graph, node, next_index, nb_objs);
}
} else {
last_spec += 4;
}
}
while (n_left_from > 0) {
uint16_t chksum;
mbuf0 = pkts[0];
pkts += 1;
n_left_from -= 1;
d0 = rte_pktmbuf_mtod(mbuf0, void *);
rte_memcpy(d0, nh[node_mbuf_priv1(mbuf0)->nh].rewrite_data,
nh[node_mbuf_priv1(mbuf0)->nh].rewrite_len);
next0 = nh[node_mbuf_priv1(mbuf0)->nh].tx_node;
ip0 = (struct rte_ipv4_hdr *)((uint8_t *)d0 +
sizeof(struct rte_ether_hdr));
chksum = node_mbuf_priv1(mbuf0)->cksum +
rte_cpu_to_be_16(0x0100);
chksum += chksum >= 0xffff;
ip0->hdr_checksum = chksum;
ip0->time_to_live = node_mbuf_priv1(mbuf0)->ttl - 1;
if (unlikely(next_index ^ next0)) {
/* Copy things successfully speculated till now */
rte_memcpy(to_next, from, last_spec * sizeof(from[0]));
from += last_spec;
to_next += last_spec;
held += last_spec;
last_spec = 0;
rte_node_enqueue_x1(graph, node, next0, from[0]);
from += 1;
} else {
last_spec += 1;
}
}
/* !!! Home run !!! */
if (likely(last_spec == nb_objs)) {
rte_node_next_stream_move(graph, node, next_index);
return nb_objs;
}
held += last_spec;
rte_memcpy(to_next, from, last_spec * sizeof(from[0]));
rte_node_next_stream_put(graph, node, next_index, held);
/* Save the last next used */
*(uint16_t *)node->ctx = next_index;
return nb_objs;
}
static int
ip4_rewrite_node_init(const struct rte_graph *graph, struct rte_node *node)
{
RTE_SET_USED(graph);
RTE_SET_USED(node);
node_dbg("ip4_rewrite", "Initialized ip4_rewrite node initialized");
return 0;
}
int
ip4_rewrite_set_next(uint16_t port_id, uint16_t next_index)
{
if (ip4_rewrite_nm == NULL) {
ip4_rewrite_nm = rte_zmalloc(
"ip4_rewrite", sizeof(struct ip4_rewrite_node_main),
RTE_CACHE_LINE_SIZE);
if (ip4_rewrite_nm == NULL)
return -ENOMEM;
}
ip4_rewrite_nm->next_index[port_id] = next_index;
return 0;
}
int
rte_node_ip4_rewrite_add(uint16_t next_hop, uint8_t *rewrite_data,
uint8_t rewrite_len, uint16_t dst_port)
{
struct ip4_rewrite_nh_header *nh;
if (next_hop >= RTE_GRAPH_IP4_REWRITE_MAX_NH)
return -EINVAL;
if (rewrite_len > RTE_GRAPH_IP4_REWRITE_MAX_LEN)
return -EINVAL;
if (ip4_rewrite_nm == NULL) {
ip4_rewrite_nm = rte_zmalloc(
"ip4_rewrite", sizeof(struct ip4_rewrite_node_main),
RTE_CACHE_LINE_SIZE);
if (ip4_rewrite_nm == NULL)
return -ENOMEM;
}
/* Check if dst port doesn't exist as edge */
if (!ip4_rewrite_nm->next_index[dst_port])
return -EINVAL;
/* Update next hop */
nh = &ip4_rewrite_nm->nh[next_hop];
memcpy(nh->rewrite_data, rewrite_data, rewrite_len);
nh->tx_node = ip4_rewrite_nm->next_index[dst_port];
nh->rewrite_len = rewrite_len;
nh->enabled = true;
return 0;
}
static struct rte_node_register ip4_rewrite_node = {
.process = ip4_rewrite_node_process,
.name = "ip4_rewrite",
/* Default edge i.e '0' is pkt drop */
.nb_edges = 1,
.next_nodes = {
[0] = "pkt_drop",
},
.init = ip4_rewrite_node_init,
};
struct rte_node_register *
ip4_rewrite_node_get(void)
{
return &ip4_rewrite_node;
}
RTE_NODE_REGISTER(ip4_rewrite_node);
|
