/*-
* 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.
*/
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 */
FLM_BATCH, /* Operation cannot be completed, algorithm asks to batch changes */
};
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;
};
};
struct fib_change_entry {
union {
struct in_addr addr4;
struct in6_addr addr6;
};
uint32_t scopeid;
uint8_t plen;
struct nhop_object *nh_old;
struct nhop_object *nh_new;
};
struct fib_change_queue {
uint32_t count;
uint32_t size;
struct fib_change_entry *entries;
};
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 enum flm_op_result flm_change_batch_t(struct rib_head *rnh,
struct fib_change_queue *q, void *data);
typedef uint8_t flm_get_pref_t(const struct rib_rtable_info *rinfo);
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 */
uint8_t flm_index; /* internal algo index */
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 */
flm_change_batch_t *flm_change_rib_items_cb;/* routing table change hook */
void *spare[8]; /* Spare callbacks */
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)
#define FIB_PRINTF(_l, _fd, _fmt, ...) fib_printf(_l, _fd, __func__, _fmt, ##__VA_ARGS__)
void fib_printf(int level, struct fib_data *fd, const char *func, char *fmt, ...);
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);
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);
bool fib_set_datapath_ptr(struct fib_data *fd, struct fib_dp *dp);
void fib_set_algo_ptr(struct fib_data *fd, void *algo_data);
void fib_epoch_call(epoch_callback_t callback, epoch_context_t ctx);
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