diff options
Diffstat (limited to 'src/vnet/fib/fib_entry_src_interface.c')
| -rw-r--r-- | src/vnet/fib/fib_entry_src_interface.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/src/vnet/fib/fib_entry_src_interface.c b/src/vnet/fib/fib_entry_src_interface.c new file mode 100644 index 00000000..6c087f34 --- /dev/null +++ b/src/vnet/fib/fib_entry_src_interface.c @@ -0,0 +1,216 @@ +/* + * 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. + */ + +#include "fib_entry.h" +#include "fib_entry_src.h" +#include "fib_path_list.h" +#include "fib_internal.h" +#include "fib_table.h" +#include "fib_entry_cover.h" +#include "fib_attached_export.h" + +/** + * Source initialisation Function + */ +static void +fib_entry_src_interface_init (fib_entry_src_t *src) +{ + src->interface.fesi_cover = FIB_NODE_INDEX_INVALID; + src->interface.fesi_sibling = FIB_NODE_INDEX_INVALID; +} + +static void +fib_entry_src_interface_add (fib_entry_src_t *src, + const fib_entry_t *entry, + fib_entry_flag_t flags, + dpo_proto_t proto, + const dpo_id_t *dpo) +{ + src->fes_pl = fib_path_list_create_special( + proto, + fib_entry_src_flags_2_path_list_flags(flags), + dpo); +} + +static void +fib_entry_src_interface_remove (fib_entry_src_t *src) +{ + src->fes_pl = FIB_NODE_INDEX_INVALID; +} + +static void +fib_entry_src_interface_path_swap (fib_entry_src_t *src, + const fib_entry_t *entry, + fib_path_list_flags_t pl_flags, + const fib_route_path_t *paths) +{ + ip_adjacency_t *adj; + + src->fes_pl = fib_path_list_create(pl_flags, paths); + + /* + * this is a hack to get the entry's prefix into the glean adjacnecy + * so that it is available for fast retreival in the switch path. + */ + if (!(FIB_ENTRY_FLAG_LOCAL & src->fes_entry_flags)) + { + adj = adj_get(fib_path_list_get_adj( + src->fes_pl, + fib_entry_get_default_chain_type(entry))); + + if (IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index) + { + /* + * the connected prefix will link to a glean on a non-p2p + * interface. + */ + adj->sub_type.glean.receive_addr = entry->fe_prefix.fp_addr; + } + } +} + +/* + * Source activate. + * Called when the source is teh new longer best source on the entry + */ +static int +fib_entry_src_interface_activate (fib_entry_src_t *src, + const fib_entry_t *fib_entry) +{ + fib_entry_t *cover; + + if (FIB_ENTRY_FLAG_LOCAL & src->fes_entry_flags) + { + /* + * Track the covering attached/connected cover. This is so that + * during an attached export of the cover, this local prefix is + * also exported + */ + src->interface.fesi_cover = + fib_table_get_less_specific(fib_entry->fe_fib_index, + &fib_entry->fe_prefix); + + ASSERT(FIB_NODE_INDEX_INVALID != src->interface.fesi_cover); + + cover = fib_entry_get(src->interface.fesi_cover); + + src->interface.fesi_sibling = + fib_entry_cover_track(cover, fib_entry_get_index(fib_entry)); + } + + return (!0); +} + + +/* + * Source Deactivate. + * Called when the source is no longer best source on the entry + */ +static void +fib_entry_src_interface_deactivate (fib_entry_src_t *src, + const fib_entry_t *fib_entry) +{ + fib_entry_t *cover; + + /* + * remove the depednecy on the covering entry + */ + if (FIB_NODE_INDEX_INVALID != src->interface.fesi_cover) + { + cover = fib_entry_get(src->interface.fesi_cover); + + fib_entry_cover_untrack(cover, src->interface.fesi_sibling); + + src->interface.fesi_cover = FIB_NODE_INDEX_INVALID; + } +} + +static fib_entry_src_cover_res_t +fib_entry_src_interface_cover_change (fib_entry_src_t *src, + const fib_entry_t *fib_entry) +{ + fib_entry_src_cover_res_t res = { + .install = !0, + .bw_reason = FIB_NODE_BW_REASON_FLAG_NONE, + }; + + if (FIB_NODE_INDEX_INVALID == src->interface.fesi_cover) + { + /* + * not tracking the cover. surprised we got poked? + */ + return (res); + } + + /* + * this function is called when this entry's cover has a more specific + * entry inserted benaeth it. That does not necessarily mean that this + * entry is covered by the new prefix. check that + */ + if (src->rr.fesr_cover != fib_table_get_less_specific(fib_entry->fe_fib_index, + &fib_entry->fe_prefix)) + { + fib_entry_src_interface_deactivate(src, fib_entry); + fib_entry_src_interface_activate(src, fib_entry); + } + return (res); +} + +static void +fib_entry_src_interface_installed (fib_entry_src_t *src, + const fib_entry_t *fib_entry) +{ + /* + * The interface source now rules! poke our cover to get exported + */ + fib_entry_t *cover; + + if (FIB_NODE_INDEX_INVALID != src->interface.fesi_cover) + { + cover = fib_entry_get(src->interface.fesi_cover); + + fib_attached_export_covered_added(cover, + fib_entry_get_index(fib_entry)); + } +} + +static u8* +fib_entry_src_interface_format (fib_entry_src_t *src, + u8* s) +{ + return (format(s, "cover:%d", src->interface.fesi_cover)); +} + +const static fib_entry_src_vft_t interface_src_vft = { + .fesv_init = fib_entry_src_interface_init, + .fesv_add = fib_entry_src_interface_add, + .fesv_remove = fib_entry_src_interface_remove, + .fesv_path_swap = fib_entry_src_interface_path_swap, + .fesv_activate = fib_entry_src_interface_activate, + .fesv_deactivate = fib_entry_src_interface_deactivate, + .fesv_format = fib_entry_src_interface_format, + .fesv_installed = fib_entry_src_interface_installed, + .fesv_cover_change = fib_entry_src_interface_cover_change, + /* + * not concerned about updates to the cover. the cover will + * decide to export or not + */ +}; + +void +fib_entry_src_interface_register (void) +{ + fib_entry_src_register(FIB_SOURCE_INTERFACE, &interface_src_vft); +} |