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
|
/*
* 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;
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 one cache line-- 64 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->is_appface) /* 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->is_appface))
{
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:
*/
|
