1/*
2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#include <vnet/ip/ip.h>
17#include <vnet/dpo/classify_dpo.h>
18#include <vnet/mpls/mpls.h>
19
20/*
21 * pool of all MPLS Label DPOs
22 */
23classify_dpo_t *classify_dpo_pool;
24
25static classify_dpo_t *
26classify_dpo_alloc (void)
27{
28    classify_dpo_t *cd;
29
30    pool_get_aligned(classify_dpo_pool, cd, CLIB_CACHE_LINE_BYTES);
31    clib_memset(cd, 0, sizeof(*cd));
32
33    return (cd);
34}
35
36static index_t
37classify_dpo_get_index (classify_dpo_t *cd)
38{
39    return (cd - classify_dpo_pool);
40}
41
42index_t
43classify_dpo_create (dpo_proto_t proto,
44                     u32 classify_table_index)
45{
46    classify_dpo_t *cd;
47
48    cd = classify_dpo_alloc();
49    cd->cd_proto = proto;
50    cd->cd_table_index = classify_table_index;
51
52    return (classify_dpo_get_index(cd));
53}
54
55u8*
56format_classify_dpo (u8 *s, va_list *args)
57{
58    index_t index = va_arg (*args, index_t);
59    CLIB_UNUSED(u32 indent) = va_arg (*args, u32);
60    classify_dpo_t *cd;
61
62    cd = classify_dpo_get(index);
63
64    return (format(s, "%U-classify:[%d]:table:%d",
65		   format_dpo_proto, cd->cd_proto,
66		   index, cd->cd_table_index));
67}
68
69static void
70classify_dpo_lock (dpo_id_t *dpo)
71{
72    classify_dpo_t *cd;
73
74    cd = classify_dpo_get(dpo->dpoi_index);
75
76    cd->cd_locks++;
77}
78
79static void
80classify_dpo_unlock (dpo_id_t *dpo)
81{
82    classify_dpo_t *cd;
83
84    cd = classify_dpo_get(dpo->dpoi_index);
85
86    cd->cd_locks--;
87
88    if (0 == cd->cd_locks)
89    {
90	pool_put(classify_dpo_pool, cd);
91    }
92}
93
94static void
95classify_dpo_mem_show (void)
96{
97    fib_show_memory_usage("Classify",
98			  pool_elts(classify_dpo_pool),
99			  pool_len(classify_dpo_pool),
100			  sizeof(classify_dpo_t));
101}
102
103const static dpo_vft_t cd_vft = {
104    .dv_lock = classify_dpo_lock,
105    .dv_unlock = classify_dpo_unlock,
106    .dv_format = format_classify_dpo,
107    .dv_mem_show = classify_dpo_mem_show,
108};
109
110const static char* const classify_ip4_nodes[] =
111{
112    "ip4-classify",
113    NULL,
114};
115const static char* const classify_ip6_nodes[] =
116{
117    "ip6-classify",
118    NULL,
119};
120const static char* const * const classify_nodes[DPO_PROTO_NUM] =
121{
122    [DPO_PROTO_IP4]  = classify_ip4_nodes,
123    [DPO_PROTO_IP6]  = classify_ip6_nodes,
124    [DPO_PROTO_MPLS] = NULL,
125};
126
127void
128classify_dpo_module_init (void)
129{
130    dpo_register(DPO_CLASSIFY, &cd_vft, classify_nodes);
131}
132