From 7cd468a3d7dee7d6c92f69a0bb7061ae208ec727 Mon Sep 17 00:00:00 2001 From: Damjan Marion Date: Mon, 19 Dec 2016 23:05:39 +0100 Subject: Reorganize source tree to use single autotools instance Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion --- src/vnet/adj/adj_glean.c | 285 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 285 insertions(+) create mode 100644 src/vnet/adj/adj_glean.c (limited to 'src/vnet/adj/adj_glean.c') diff --git a/src/vnet/adj/adj_glean.c b/src/vnet/adj/adj_glean.c new file mode 100644 index 00000000..8d86e2a9 --- /dev/null +++ b/src/vnet/adj/adj_glean.c @@ -0,0 +1,285 @@ +/* + * 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 +#include +#include + +/* + * The 'DB' of all glean adjs. + * There is only one glean per-interface per-protocol, so this is a per-interface + * vector + */ +static adj_index_t *adj_gleans[FIB_PROTOCOL_MAX]; + +static inline vlib_node_registration_t* +adj_get_glean_node (fib_protocol_t proto) +{ + switch (proto) { + case FIB_PROTOCOL_IP4: + return (&ip4_glean_node); + case FIB_PROTOCOL_IP6: + return (&ip6_glean_node); + case FIB_PROTOCOL_MPLS: + break; + } + ASSERT(0); + return (NULL); +} + +/* + * adj_glean_add_or_lock + * + * The next_hop address here is used for source address selection in the DP. + * The glean adj is added to an interface's connected prefix, the next-hop + * passed here is the local prefix on the same interface. + */ +adj_index_t +adj_glean_add_or_lock (fib_protocol_t proto, + u32 sw_if_index, + const ip46_address_t *nh_addr) +{ + ip_adjacency_t * adj; + + vec_validate_init_empty(adj_gleans[proto], sw_if_index, ADJ_INDEX_INVALID); + + if (ADJ_INDEX_INVALID == adj_gleans[proto][sw_if_index]) + { + adj = adj_alloc(proto); + + adj->lookup_next_index = IP_LOOKUP_NEXT_GLEAN; + adj->ia_nh_proto = proto; + adj_gleans[proto][sw_if_index] = adj_get_index(adj); + + if (NULL != nh_addr) + { + adj->sub_type.glean.receive_addr = *nh_addr; + } + + adj->rewrite_header.data_bytes = 0; + + vnet_rewrite_for_sw_interface(vnet_get_main(), + adj_fib_proto_2_nd(proto), + sw_if_index, + adj_get_glean_node(proto)->index, + VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST, + &adj->rewrite_header, + sizeof (adj->rewrite_data)); + } + else + { + adj = adj_get(adj_gleans[proto][sw_if_index]); + } + + adj_lock(adj_get_index(adj)); + + return (adj_get_index(adj)); +} + +void +adj_glean_remove (fib_protocol_t proto, + u32 sw_if_index) +{ + ASSERT(sw_if_index < vec_len(adj_gleans[proto])); + + adj_gleans[proto][sw_if_index] = ADJ_INDEX_INVALID; +} + +static clib_error_t * +adj_glean_interface_state_change (vnet_main_t * vnm, + u32 sw_if_index, + u32 flags) +{ + /* + * for each glean on the interface trigger a walk back to the children + */ + fib_protocol_t proto; + ip_adjacency_t *adj; + + + for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) + { + if (sw_if_index >= vec_len(adj_gleans[proto]) || + ADJ_INDEX_INVALID == adj_gleans[proto][sw_if_index]) + continue; + + adj = adj_get(adj_gleans[proto][sw_if_index]); + + fib_node_back_walk_ctx_t bw_ctx = { + .fnbw_reason = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP ? + FIB_NODE_BW_REASON_FLAG_INTERFACE_UP : + FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN), + }; + + fib_walk_sync(FIB_NODE_TYPE_ADJ, adj_get_index(adj), &bw_ctx); + } + + return (NULL); +} + +VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION(adj_glean_interface_state_change); + +/** + * @brief Invoked on each SW interface of a HW interface when the + * HW interface state changes + */ +static void +adj_nbr_hw_sw_interface_state_change (vnet_main_t * vnm, + u32 sw_if_index, + void *arg) +{ + adj_glean_interface_state_change(vnm, sw_if_index, (uword) arg); +} + +/** + * @brief Registered callback for HW interface state changes + */ +static clib_error_t * +adj_glean_hw_interface_state_change (vnet_main_t * vnm, + u32 hw_if_index, + u32 flags) +{ + /* + * walk SW interfaces on the HW + */ + uword sw_flags; + + sw_flags = ((flags & VNET_HW_INTERFACE_FLAG_LINK_UP) ? + VNET_SW_INTERFACE_FLAG_ADMIN_UP : + 0); + + vnet_hw_interface_walk_sw(vnm, hw_if_index, + adj_nbr_hw_sw_interface_state_change, + (void*) sw_flags); + + return (NULL); +} + +VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION( + adj_glean_hw_interface_state_change); + +static clib_error_t * +adj_glean_interface_delete (vnet_main_t * vnm, + u32 sw_if_index, + u32 is_add) +{ + /* + * for each glean on the interface trigger a walk back to the children + */ + fib_protocol_t proto; + ip_adjacency_t *adj; + + if (is_add) + { + /* + * not interested in interface additions. we will not back walk + * to resolve paths through newly added interfaces. Why? The control + * plane should have the brains to add interfaces first, then routes. + * So the case where there are paths with a interface that matches + * one just created is the case where the path resolved through an + * interface that was deleted, and still has not been removed. The + * new interface added, is NO GUARANTEE that the interface being + * added now, even though it may have the same sw_if_index, is the + * same interface that the path needs. So tough! + * If the control plane wants these routes to resolve it needs to + * remove and add them again. + */ + return (NULL); + } + + for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) + { + if (sw_if_index >= vec_len(adj_gleans[proto]) || + ADJ_INDEX_INVALID == adj_gleans[proto][sw_if_index]) + continue; + + adj = adj_get(adj_gleans[proto][sw_if_index]); + + fib_node_back_walk_ctx_t bw_ctx = { + .fnbw_reason = FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE, + }; + + fib_walk_sync(FIB_NODE_TYPE_ADJ, adj_get_index(adj), &bw_ctx); + } + + return (NULL); +} + +VNET_SW_INTERFACE_ADD_DEL_FUNCTION(adj_glean_interface_delete); + +u8* +format_adj_glean (u8* s, va_list *ap) +{ + index_t index = va_arg(*ap, index_t); + CLIB_UNUSED(u32 indent) = va_arg(*ap, u32); + vnet_main_t * vnm = vnet_get_main(); + ip_adjacency_t * adj = adj_get(index); + + return (format(s, "%U-glean: %U", + format_fib_protocol, adj->ia_nh_proto, + format_vnet_sw_interface_name, + vnm, + vnet_get_sw_interface(vnm, + adj->rewrite_header.sw_if_index))); +} + + +static void +adj_dpo_lock (dpo_id_t *dpo) +{ + adj_lock(dpo->dpoi_index); +} +static void +adj_dpo_unlock (dpo_id_t *dpo) +{ + adj_unlock(dpo->dpoi_index); +} + +const static dpo_vft_t adj_glean_dpo_vft = { + .dv_lock = adj_dpo_lock, + .dv_unlock = adj_dpo_unlock, + .dv_format = format_adj_glean, +}; + +/** + * @brief The per-protocol VLIB graph nodes that are assigned to a glean + * object. + * + * this means that these graph nodes are ones from which a glean is the + * parent object in the DPO-graph. + */ +const static char* const glean_ip4_nodes[] = +{ + "ip4-glean", + NULL, +}; +const static char* const glean_ip6_nodes[] = +{ + "ip6-glean", + NULL, +}; + +const static char* const * const glean_nodes[DPO_PROTO_NUM] = +{ + [DPO_PROTO_IP4] = glean_ip4_nodes, + [DPO_PROTO_IP6] = glean_ip6_nodes, + [DPO_PROTO_MPLS] = NULL, +}; + +void +adj_glean_module_init (void) +{ + dpo_register(DPO_ADJACENCY_GLEAN, &adj_glean_dpo_vft, glean_nodes); +} -- cgit 1.2.3-korg