From 32e1c010b0c34fd0984f7fc45fae648a182025c5 Mon Sep 17 00:00:00 2001 From: Neale Ranns Date: Tue, 22 Nov 2016 17:07:28 +0000 Subject: IP Multicast FIB (mfib) - IPv[46] mfib tables with support for (*,G/m), (*,G) and (S,G) exact and longest prefix match - Replication represented via a new replicate DPO. - RPF configuration and data-plane checking - data-plane signals sent to listening control planes. The functions of multicast forwarding entries differ from their unicast conterparts, so we introduce a new mfib_table_t and mfib_entry_t objects. However, we re-use the fib_path_list to resolve and build the entry's output list. the fib_path_list provides the service to construct a replicate DPO for multicast. 'make tests' is added to with two new suites; TEST=mfib, this is invocation of the CLI command 'test mfib' which deals with many path add/remove, flag set/unset scenarios, TEST=ip-mcast, data-plane forwarding tests. Updated applications to use the new MIFB functions; - IPv6 NS/RA. - DHCPv6 unit tests for these are undated accordingly. Change-Id: I49ec37b01f1b170335a5697541c8fd30e6d3a961 Signed-off-by: Neale Ranns --- src/vnet/dpo/replicate_dpo.h | 143 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 143 insertions(+) create mode 100644 src/vnet/dpo/replicate_dpo.h (limited to 'src/vnet/dpo/replicate_dpo.h') diff --git a/src/vnet/dpo/replicate_dpo.h b/src/vnet/dpo/replicate_dpo.h new file mode 100644 index 00000000000..a564739c9f2 --- /dev/null +++ b/src/vnet/dpo/replicate_dpo.h @@ -0,0 +1,143 @@ +/* + * Copyright (c) 2016 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. + */ +/** + * @brief + * + */ + +#ifndef __REPLICATE_DPO_H__ +#define __REPLICATE_DPO_H__ + +#include +#include +#include +#include +#include + +/** + * replicate main + */ +typedef struct replicate_main_t_ +{ + vlib_combined_counter_main_t repm_counters; +} replicate_main_t; + +extern replicate_main_t replicate_main; + +/** + * The number of buckets that a load-balance object can have and still + * fit in one cache-line + */ +#define REP_NUM_INLINE_BUCKETS 4 + +/** + * The FIB DPO provieds; + * - load-balancing over the next DPOs in the chain/graph + * - per-route counters + */ +typedef struct replicate_t_ { + /** + * number of buckets in the load-balance. always a power of 2. + */ + u16 rep_n_buckets; + + /** + * The protocol of packets that traverse this REP. + * need in combination with the flow hash config to determine how to hash. + * u8. + */ + dpo_proto_t rep_proto; + + /** + * The number of locks, which is approximately the number of users, + * of this load-balance. + * Load-balance objects of via-entries are heavily shared by recursives, + * so the lock count is a u32. + */ + u32 rep_locks; + + /** + * Vector of buckets containing the next DPOs, sized as repo_num + */ + dpo_id_t *rep_buckets; + + /** + * The rest of the cache line is used for buckets. In the common case + * where there there are less than 4 buckets, then the buckets are + * on the same cachlie and we save ourselves a pointer dereferance in + * the data-path. + */ + dpo_id_t rep_buckets_inline[REP_NUM_INLINE_BUCKETS]; +} replicate_t; + +STATIC_ASSERT(sizeof(replicate_t) <= CLIB_CACHE_LINE_BYTES, + "A replicate object size exceeds one cachline"); + +/** + * Flags controlling load-balance formatting/display + */ +typedef enum replicate_format_flags_t_ { + REPLICATE_FORMAT_NONE, + REPLICATE_FORMAT_DETAIL = (1 << 0), +} replicate_format_flags_t; + +extern index_t replicate_create(u32 num_buckets, + dpo_proto_t rep_proto); +extern void replicate_multipath_update( + const dpo_id_t *dpo, + load_balance_path_t *next_hops); + +extern void replicate_set_bucket(index_t repi, + u32 bucket, + const dpo_id_t *next); + +extern u8* format_replicate(u8 * s, va_list * args); + +extern const dpo_id_t *replicate_get_bucket(index_t repi, + u32 bucket); +extern int replicate_is_drop(const dpo_id_t *dpo); + +/** + * The encapsulation breakages are for fast DP access + */ +extern replicate_t *replicate_pool; +static inline replicate_t* +replicate_get (index_t repi) +{ + return (pool_elt_at_index(replicate_pool, repi)); +} + +#define REP_HAS_INLINE_BUCKETS(_rep) \ + ((_rep)->rep_n_buckets <= REP_NUM_INLINE_BUCKETS) + +static inline const dpo_id_t * +replicate_get_bucket_i (const replicate_t *rep, + u32 bucket) +{ + ASSERT(bucket < rep->rep_n_buckets); + + if (PREDICT_TRUE(REP_HAS_INLINE_BUCKETS(rep))) + { + return (&rep->rep_buckets_inline[bucket]); + } + else + { + return (&rep->rep_buckets[bucket]); + } +} + +extern void replicate_module_init(void); + +#endif -- cgit 1.2.3-korg