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Ed Warnickecb9cada2015-12-08 15:45:58 -07001/*
2 * l2_input.h : layer 2 input packet processing
3 *
4 * Copyright (c) 2013 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18#ifndef included_vnet_l2_input_h
19#define included_vnet_l2_input_h
20
21#include <vlib/vlib.h>
22#include <vnet/vnet.h>
23#include <vnet/l2/l2_bd.h>
24#include <vnet/ethernet/packet.h>
25#include <vnet/ip/ip.h>
26
Dave Barach97d8dc22016-08-15 15:31:15 -040027/* Per-subinterface L2 feature configuration */
Ed Warnickecb9cada2015-12-08 15:45:58 -070028
Dave Barach97d8dc22016-08-15 15:31:15 -040029typedef struct
30{
Ed Warnickecb9cada2015-12-08 15:45:58 -070031
Dave Barach97d8dc22016-08-15 15:31:15 -040032 union
33 {
34 u16 bd_index; /* bridge domain id */
35 u32 output_sw_if_index; /* for xconnect */
Ed Warnickecb9cada2015-12-08 15:45:58 -070036 };
37
Eyal Bari78cfeb42018-08-22 17:02:46 +030038 /* config for which input features are configured on this interface */
39 u32 feature_bitmap;
40
41 /* split horizon group */
42 u8 shg;
43
Dave Barach97d8dc22016-08-15 15:31:15 -040044 /* Interface mode. If both are 0, this interface is in L3 mode */
45 u8 xconnect;
46 u8 bridge;
Ed Warnickecb9cada2015-12-08 15:45:58 -070047
Dave Barach97d8dc22016-08-15 15:31:15 -040048 /* this is the bvi interface for the bridge-domain */
49 u8 bvi;
Ed Warnickecb9cada2015-12-08 15:45:58 -070050
Ed Warnickecb9cada2015-12-08 15:45:58 -070051} l2_input_config_t;
52
53
Dave Barach97d8dc22016-08-15 15:31:15 -040054typedef struct
55{
Ed Warnickecb9cada2015-12-08 15:45:58 -070056
Dave Barach97d8dc22016-08-15 15:31:15 -040057 /* Next nodes for the feature bitmap */
Ed Warnickecb9cada2015-12-08 15:45:58 -070058 u32 feat_next_node_index[32];
59
60 /* config vector indexed by sw_if_index */
61 l2_input_config_t *configs;
62
Florin Coras1a1adc72016-07-22 01:45:30 +020063 /* bridge domain config vector indexed by bd_index */
Ed Warnickecb9cada2015-12-08 15:45:58 -070064 l2_bridge_domain_t *bd_configs;
65
66 /* convenience variables */
Dave Barach97d8dc22016-08-15 15:31:15 -040067 vlib_main_t *vlib_main;
68 vnet_main_t *vnet_main;
Ed Warnickecb9cada2015-12-08 15:45:58 -070069} l2input_main_t;
70
71extern l2input_main_t l2input_main;
72
John Lo405e41b2016-04-23 15:14:12 -040073extern vlib_node_registration_t l2input_node;
74
Dave Barach97d8dc22016-08-15 15:31:15 -040075static_always_inline l2_bridge_domain_t *
Ed Warnickecb9cada2015-12-08 15:45:58 -070076l2input_bd_config_from_index (l2input_main_t * l2im, u32 bd_index)
77{
Dave Barach97d8dc22016-08-15 15:31:15 -040078 l2_bridge_domain_t *bd_config;
Ed Warnickecb9cada2015-12-08 15:45:58 -070079
Dave Barach97d8dc22016-08-15 15:31:15 -040080 bd_config = vec_elt_at_index (l2im->bd_configs, bd_index);
81 return bd_is_valid (bd_config) ? bd_config : NULL;
Ed Warnickecb9cada2015-12-08 15:45:58 -070082}
83
Eyal Bariafc47aa2017-04-20 14:45:17 +030084static_always_inline l2_bridge_domain_t *
85l2input_bd_config (u32 bd_index)
86{
87 l2input_main_t *mp = &l2input_main;
88 l2_bridge_domain_t *bd_config;
89
90 vec_validate (mp->bd_configs, bd_index);
91 bd_config = vec_elt_at_index (mp->bd_configs, bd_index);
92 return bd_config;
93}
94
John Lo20e55512016-09-22 18:24:13 -040095/* L2 input indication packet is from BVI, using -2 */
96#define L2INPUT_BVI ((u32) (~0-1))
97
Dave Barach97d8dc22016-08-15 15:31:15 -040098/* L2 input features */
Ed Warnickecb9cada2015-12-08 15:45:58 -070099
Eyal Bari001fd402017-07-16 09:34:53 +0300100/* Mappings from feature ID to graph node name in reverse order */
Dave Barach97d8dc22016-08-15 15:31:15 -0400101#define foreach_l2input_feat \
Ed Warnickecb9cada2015-12-08 15:45:58 -0700102 _(DROP, "feature-bitmap-drop") \
Ed Warnickecb9cada2015-12-08 15:45:58 -0700103 _(XCONNECT, "l2-output") \
Ed Warnickecb9cada2015-12-08 15:45:58 -0700104 _(FLOOD, "l2-flood") \
105 _(ARP_TERM, "arp-term-l2bd") \
106 _(UU_FLOOD, "l2-flood") \
Neale Rannsb4743802018-09-05 09:13:57 -0700107 _(UU_FWD, "l2-uu-fwd") \
Neale Ranns25b04942018-04-04 09:34:50 -0700108 _(GBP_FWD, "gbp-fwd") \
Ed Warnickecb9cada2015-12-08 15:45:58 -0700109 _(FWD, "l2-fwd") \
Pierre Pfisterd6f5b962016-03-21 16:17:52 +0000110 _(RW, "l2-rw") \
Ed Warnickecb9cada2015-12-08 15:45:58 -0700111 _(LEARN, "l2-learn") \
Neale Ranns55d03782017-10-21 06:34:22 -0700112 _(L2_EMULATION, "l2-emulation") \
Neale Ranns25b04942018-04-04 09:34:50 -0700113 _(GBP_NULL_CLASSIFY, "gbp-null-classify") \
114 _(GBP_SRC_CLASSIFY, "gbp-src-classify") \
Ed Warnickecb9cada2015-12-08 15:45:58 -0700115 _(VTR, "l2-input-vtr") \
Igor Mikhailov (imichail)d66e3d42018-04-19 15:06:27 -0700116 _(L2_IP_QOS_RECORD, "l2-ip-qos-record") \
Ed Warnickecb9cada2015-12-08 15:45:58 -0700117 _(VPATH, "vpath-input-l2") \
Ed Warnickecb9cada2015-12-08 15:45:58 -0700118 _(ACL, "l2-input-acl") \
Dave Barachb84a3e52016-08-30 17:01:52 -0400119 _(POLICER_CLAS, "l2-policer-classify") \
Andrew Yourtchenkoa23cade2018-10-06 09:18:00 +0200120 _(INPUT_FEAT_ARC, "l2-input-feat-arc") \
Eyal Bari001fd402017-07-16 09:34:53 +0300121 _(INPUT_CLASSIFY, "l2-input-classify") \
122 _(SPAN, "span-l2-input")
Ed Warnickecb9cada2015-12-08 15:45:58 -0700123
Dave Barach97d8dc22016-08-15 15:31:15 -0400124/* Feature bitmap positions */
125typedef enum
126{
Ed Warnickecb9cada2015-12-08 15:45:58 -0700127#define _(sym,str) L2INPUT_FEAT_##sym##_BIT,
128 foreach_l2input_feat
129#undef _
Eyal Bari8af1b2f2017-07-11 14:24:37 +0300130 L2INPUT_N_FEAT
Ed Warnickecb9cada2015-12-08 15:45:58 -0700131} l2input_feat_t;
132
Eyal Bari8af1b2f2017-07-11 14:24:37 +0300133STATIC_ASSERT (L2INPUT_N_FEAT <= 32, "too many l2 input features");
134
Dave Barach97d8dc22016-08-15 15:31:15 -0400135/* Feature bit masks */
136typedef enum
137{
Ed Warnickecb9cada2015-12-08 15:45:58 -0700138#define _(sym,str) L2INPUT_FEAT_##sym = (1<<L2INPUT_FEAT_##sym##_BIT),
139 foreach_l2input_feat
140#undef _
Eyal Bari8af1b2f2017-07-11 14:24:37 +0300141 L2INPUT_VALID_MASK =
142#define _(sym,str) L2INPUT_FEAT_##sym |
143 foreach_l2input_feat
144#undef _
145 0
Ed Warnickecb9cada2015-12-08 15:45:58 -0700146} l2input_feat_masks_t;
Dave Barach97d8dc22016-08-15 15:31:15 -0400147
Eyal Bari8af1b2f2017-07-11 14:24:37 +0300148STATIC_ASSERT ((u64) L2INPUT_VALID_MASK == (1ull << L2INPUT_N_FEAT) - 1, "");
149
Dave Barach97d8dc22016-08-15 15:31:15 -0400150/** Return an array of strings containing graph node names of each feature */
151char **l2input_get_feat_names (void);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700152
Eyal Bari942402b2017-07-26 11:57:04 +0300153/* arg0 - u32 feature_bitmap */
154u8 *format_l2_input_features (u8 * s, va_list * args);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700155
Dave Barach97d8dc22016-08-15 15:31:15 -0400156static_always_inline u8
157bd_feature_flood (l2_bridge_domain_t * bd_config)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700158{
Dave Barach97d8dc22016-08-15 15:31:15 -0400159 return ((bd_config->feature_bitmap & L2INPUT_FEAT_FLOOD) ==
160 L2INPUT_FEAT_FLOOD);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700161}
162
Dave Barach97d8dc22016-08-15 15:31:15 -0400163static_always_inline u8
164bd_feature_uu_flood (l2_bridge_domain_t * bd_config)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700165{
Dave Barach97d8dc22016-08-15 15:31:15 -0400166 return ((bd_config->feature_bitmap & L2INPUT_FEAT_UU_FLOOD) ==
167 L2INPUT_FEAT_UU_FLOOD);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700168}
169
Dave Barach97d8dc22016-08-15 15:31:15 -0400170static_always_inline u8
171bd_feature_forward (l2_bridge_domain_t * bd_config)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700172{
Dave Barach97d8dc22016-08-15 15:31:15 -0400173 return ((bd_config->feature_bitmap & L2INPUT_FEAT_FWD) == L2INPUT_FEAT_FWD);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700174}
175
Dave Barach97d8dc22016-08-15 15:31:15 -0400176static_always_inline u8
177bd_feature_learn (l2_bridge_domain_t * bd_config)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700178{
Dave Barach97d8dc22016-08-15 15:31:15 -0400179 return ((bd_config->feature_bitmap & L2INPUT_FEAT_LEARN) ==
180 L2INPUT_FEAT_LEARN);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700181}
182
Dave Barach97d8dc22016-08-15 15:31:15 -0400183static_always_inline u8
184bd_feature_arp_term (l2_bridge_domain_t * bd_config)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700185{
Dave Barach97d8dc22016-08-15 15:31:15 -0400186 return ((bd_config->feature_bitmap & L2INPUT_FEAT_ARP_TERM) ==
187 L2INPUT_FEAT_ARP_TERM);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700188}
189
Dave Barach97d8dc22016-08-15 15:31:15 -0400190/** Masks for eliminating features that do not apply to a packet */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700191
Dave Barach97d8dc22016-08-15 15:31:15 -0400192/** Get a pointer to the config for the given interface */
193l2_input_config_t *l2input_intf_config (u32 sw_if_index);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700194
Dave Barach97d8dc22016-08-15 15:31:15 -0400195/* Enable (or disable) the feature in the bitmap for the given interface */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700196u32 l2input_intf_bitmap_enable (u32 sw_if_index,
Dave Barach97d8dc22016-08-15 15:31:15 -0400197 u32 feature_bitmap, u32 enable);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700198
Dave Barach97d8dc22016-08-15 15:31:15 -0400199/* Sets modifies flags from a bridge domain */
200u32 l2input_set_bridge_features (u32 bd_index, u32 feat_mask, u32 feat_value);
Pierre Pfisterd6f5b962016-03-21 16:17:52 +0000201
Neale Ranns3b81a1e2018-09-06 09:50:26 -0700202void l2input_interface_mac_change (u32 sw_if_index,
203 const u8 * old_address,
204 const u8 * new_address);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700205
206#define MODE_L3 0
207#define MODE_L2_BRIDGE 1
208#define MODE_L2_XC 2
209#define MODE_L2_CLASSIFY 3
210
211#define MODE_ERROR_ETH 1
212#define MODE_ERROR_BVI_DEF 2
213
214u32 set_int_l2_mode (vlib_main_t * vm,
Dave Barach97d8dc22016-08-15 15:31:15 -0400215 vnet_main_t * vnet_main,
216 u32 mode,
217 u32 sw_if_index,
Neale Rannsb4743802018-09-05 09:13:57 -0700218 u32 bd_index, l2_bd_port_type_t port_type,
219 u32 shg, u32 xc_sw_if_index);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700220
221static inline void
222vnet_update_l2_len (vlib_buffer_t * b)
223{
Dave Barach97d8dc22016-08-15 15:31:15 -0400224 ethernet_header_t *eth;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700225 u16 ethertype;
Chris Luke194ebc52016-04-25 14:26:55 -0400226 u8 vlan_count = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700227
Paul Vinciguerrabdc0e6b2018-09-22 05:32:50 -0700228 /* point at current l2 hdr */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700229 eth = vlib_buffer_get_current (b);
230
Dave Barach97d8dc22016-08-15 15:31:15 -0400231 /*
Ed Warnickecb9cada2015-12-08 15:45:58 -0700232 * l2-output pays no attention to this
233 * but the tag push/pop code on an l2 subif needs it.
Dave Barach97d8dc22016-08-15 15:31:15 -0400234 *
235 * Determine l2 header len, check for up to 2 vlans
Ed Warnickecb9cada2015-12-08 15:45:58 -0700236 */
Dave Barach97d8dc22016-08-15 15:31:15 -0400237 vnet_buffer (b)->l2.l2_len = sizeof (ethernet_header_t);
238 ethertype = clib_net_to_host_u16 (eth->type);
Damjan Marionb94bdad2016-09-19 11:32:03 +0200239 if (ethernet_frame_is_tagged (ethertype))
Dave Barach97d8dc22016-08-15 15:31:15 -0400240 {
241 ethernet_vlan_header_t *vlan;
242 vnet_buffer (b)->l2.l2_len += sizeof (*vlan);
243 vlan_count = 1;
244 vlan = (void *) (eth + 1);
245 ethertype = clib_net_to_host_u16 (vlan->type);
246 if (ethertype == ETHERNET_TYPE_VLAN)
247 {
248 vnet_buffer (b)->l2.l2_len += sizeof (*vlan);
249 vlan_count = 2;
250 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700251 }
Dave Barach97d8dc22016-08-15 15:31:15 -0400252 ethernet_buffer_set_vlan_count (b, vlan_count);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700253}
254
255/*
Dave Barach97d8dc22016-08-15 15:31:15 -0400256 * Compute flow hash of an ethernet packet, use 5-tuple hash if L3 packet
257 * is ip4 or ip6. Otherwise hash on smac/dmac/etype.
258 * The vlib buffer current pointer is expected to be at ethernet header
Paul Vinciguerrabdc0e6b2018-09-22 05:32:50 -0700259 * and vnet l2.l2_len is expected to be setup already.
Ed Warnickecb9cada2015-12-08 15:45:58 -0700260 */
Dave Barach97d8dc22016-08-15 15:31:15 -0400261static inline u32
262vnet_l2_compute_flow_hash (vlib_buffer_t * b)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700263{
Dave Barach97d8dc22016-08-15 15:31:15 -0400264 ethernet_header_t *eh = vlib_buffer_get_current (b);
265 u8 *l3h = (u8 *) eh + vnet_buffer (b)->l2.l2_len;
266 u16 ethertype = clib_net_to_host_u16 (*(u16 *) (l3h - 2));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700267
Dave Barach97d8dc22016-08-15 15:31:15 -0400268 if (ethertype == ETHERNET_TYPE_IP4)
269 return ip4_compute_flow_hash ((ip4_header_t *) l3h, IP_FLOW_HASH_DEFAULT);
270 else if (ethertype == ETHERNET_TYPE_IP6)
271 return ip6_compute_flow_hash ((ip6_header_t *) l3h, IP_FLOW_HASH_DEFAULT);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700272 else
273 {
274 u32 a, b, c;
Dave Barach97d8dc22016-08-15 15:31:15 -0400275 u32 *ap = (u32 *) & eh->dst_address[2];
276 u32 *bp = (u32 *) & eh->src_address[2];
277 a = *ap;
278 b = *bp;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700279 c = ethertype;
280 hash_v3_mix32 (a, b, c);
281 hash_v3_finalize32 (a, b, c);
282 return c;
283 }
284}
285
286#endif
287
Dave Barach97d8dc22016-08-15 15:31:15 -0400288
289/*
290 * fd.io coding-style-patch-verification: ON
291 *
292 * Local Variables:
293 * eval: (c-set-style "gnu")
294 * End:
295 */