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Vector Packet Processing
l2_rw.h
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1 /*
2  * Copyright (c) 2015 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 /*
17  * l2_rw is based on vnet classifier and provides a way
18  * to modify packets matching a given table.
19  *
20  * Tables must be created using vnet's classify features.
21  * Entries contained within these tables must have their
22  * opaque index set to the rewrite entry created with l2_rw_mod_entry.
23  */
24 
25 #ifndef L2_RW_H_
26 #define L2_RW_H_
27 
28 #include <vnet/l2/l2_input.h>
29 
30 /* *INDENT-OFF* */
31 typedef CLIB_PACKED(struct _l2_rw_entry {
32  u16 skip_n_vectors;
33  u16 rewrite_n_vectors;
34  u64 hit_count;
35  u32x4 *mask;
36  u32x4 *value;
37 }) l2_rw_entry_t;
38 /* *INDENT-ON* */
39 
40 /* l2_rw configuration for one interface */
41 /* *INDENT-OFF* */
42 typedef CLIB_PACKED(struct _l2_rw_config {
43  u32 table_index; /* Which classify table to use */
44  u32 miss_index; /* Rewrite entry to use if table does not match */
45 }) l2_rw_config_t;
46 /* *INDENT-ON* */
47 
48 typedef struct
49 {
50  /* Next feature node indexes */
51  u32 feat_next_node_index[32];
52 
53  /* A pool of entries */
54  l2_rw_entry_t *entries;
55 
56  /* Config vector indexed by sw_if_index */
57  l2_rw_config_t *configs;
59 } l2_rw_main_t;
60 
62 
63 /*
64  * Specifies which classify table and miss_index should be used
65  * with the given interface.
66  * Use special values ~0 in order to un-set table_index
67  * or miss_index.
68  * l2_rw feature is automatically enabled for the interface
69  * when table_index or miss_index is not ~0.
70  * returns 0 on success and something else on error.
71  */
72 int l2_rw_interface_set_table (u32 sw_if_index,
73  u32 table_index, u32 miss_index);
74 
75 /*
76  * Creates, modifies or delete a rewrite entry.
77  * If *index != ~0, modifies an existing entry (or simply
78  * deletes it if is_del is set).
79  * If *index == ~0, creates a new entry and the created
80  * entry index is stored in *index (Does nothing if is_del
81  * is set).
82  * returns 0 on success and something else on error.
83  */
84 int l2_rw_mod_entry (u32 * index,
85  u8 * mask, u8 * value, u32 len, u32 skip, u8 is_del);
86 
87 #endif /* L2_FW_H_ */
88 
89 /*
90  * fd.io coding-style-patch-verification: ON
91  *
92  * Local Variables:
93  * eval: (c-set-style "gnu")
94  * End:
95  */
l2_rw_config_t * configs
Definition: l2_rw.h:57
int l2_rw_mod_entry(u32 *index, u8 *mask, u8 *value, u32 len, u32 skip, u8 is_del)
Definition: l2_rw.c:361
unsigned long long u32x4
Definition: ixge.c:28
l2_rw_main_t l2_rw_main
Definition: l2_rw.c:29
unsigned long u64
Definition: types.h:89
uword * configs_bitmap
Definition: l2_rw.h:58
unsigned int u32
Definition: types.h:88
u64 uword
Definition: types.h:112
unsigned short u16
Definition: types.h:57
unsigned char u8
Definition: types.h:56
typedef CLIB_PACKED(struct _l2_rw_entry{u16 skip_n_vectors;u16 rewrite_n_vectors;u64 hit_count;u32x4 *mask;u32x4 *value;}) l2_rw_entry_t
int l2_rw_interface_set_table(u32 sw_if_index, u32 table_index, u32 miss_index)
Definition: l2_rw.c:467
l2_rw_entry_t * entries
Definition: l2_rw.h:54