Differential D27401 Diff 80119 sys/net/route/route_algo.h

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sys/net/route/route_algo.h

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				/*-
				* Copyright (c) 2020
				* Alexander V. Chernikov <melifaro@FreeBSD.org>
				*
				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				* 1. Redistributions of source code must retain the above copyright
				* notice, this list of conditions and the following disclaimer.
				* 2. Redistributions in binary form must reproduce the above copyright
				* notice, this list of conditions and the following disclaimer in the
				* documentation and/or other materials provided with the distribution.
				* 3. Neither the name of the University nor the names of its contributors
				* may be used to endorse or promote products derived from this software
				* without specific prior written permission.
				*
				* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
				* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
				* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
				* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
				* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
				* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
				* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
				* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
				* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
				* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
				* SUCH DAMAGE.
				*
				* $FreeBSD$
				*/


				struct fib_data;
				struct fib_dp;
				enum flm_op_result {
				FLM_SUCCESS, /* No errors, operation successful */
				FLM_REBUILD, /* Operation cannot be completed, schedule algorithm rebuild */
				FLM_ERROR, /* Operation failed, this algo cannot be used */
				};

				struct rib_rtable_info {
				uint32_t num_prefixes;
				uint32_t num_nhops;
				uint32_t num_nhgrp;
				};

				struct flm_lookup_key {
				union {
				const struct in6_addr *addr6;
				struct in_addr addr4;
				};
				};

				typedef struct nhop_object flm_lookup_t(void algo_data,
				const struct flm_lookup_key key, uint32_t scopeid);
				typedef enum flm_op_result flm_init_t (uint32_t fibnum, struct fib_data *fd,
				void _old_data, void *new_data);
				typedef void flm_destroy_t(void *data);
				typedef enum flm_op_result flm_dump_t(struct rtentry rt, void data);
				typedef enum flm_op_result flm_dump_end_t(void data, struct fib_dp dp);
				typedef enum flm_op_result flm_change_t(struct rib_head *rnh,
				struct rib_cmd_info rc, void data);
				typedef uint8_t flm_get_pref_t(const struct rib_rtable_info *rinfo);

				#define FIB_M_NEED_NHOPS 0x01 /* need nexthop index map allocation */
				#define FIB_M_NO_CALLOUT 0x02 /* does not need callouts */

				struct fib_lookup_module {
				char flm_name; / algo name */
				int flm_family; /* address family this module supports */
				int flm_refcount; /* # of references */
				uint32_t flm_flags; /* flags */
				flm_init_t flm_init_cb; / instance init */
				flm_destroy_t flm_destroy_cb; / destroy instance */
				flm_change_t flm_change_rib_item_cb;/ routing table change hook */
				flm_dump_t flm_dump_rib_item_cb; / routing table dump cb */
				flm_dump_end_t flm_dump_end_cb; / end of dump */
				flm_lookup_t flm_lookup; / lookup function */
				flm_get_pref_t flm_get_pref; / get algo preference */
				TAILQ_ENTRY(fib_lookup_module) entries;
				};

				/* Datapath lookup data */
				struct fib_dp {
				flm_lookup_t *f;
				void *arg;
				};

				VNET_DECLARE(struct fib_dp *, inet_dp);
				#define V_inet_dp VNET(inet_dp)
				VNET_DECLARE(struct fib_dp *, inet6_dp);
				#define V_inet6_dp VNET(inet6_dp)

				int fib_module_init(struct fib_lookup_module *flm, uint32_t fibnum,
				int family);
				int fib_module_clone(const struct fib_lookup_module *flm_orig,
				struct fib_lookup_module *flm, bool waitok);
				int fib_module_dumptree(struct fib_lookup_module *flm,
				enum rib_subscription_type subscription_type);
				int fib_module_register(struct fib_lookup_module *flm);
				int fib_module_unregister(struct fib_lookup_module *flm);

				uint32_t fib_get_nhop_idx(struct fib_data fd, struct nhop_object nh);
				void fib_free_nhop_idx(struct fib_data *fd, uint32_t idx);
				void fib_free_nhop(struct fib_data fd, struct nhop_object nh);
				struct nhop_object *fib_get_nhop_array(struct fib_data fd);
				void fib_get_rtable_info(struct rib_head rh, struct rib_rtable_info rinfo);
				struct rib_head fib_get_rh(struct fib_data fd);