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699dae230d
Currently nexthop tracking is performed for all nexthops that are being tracked after a group of contexts are passed back from the data plane for post install processing. This is inefficient and leaves us sending nexthop tracking changes at an accelerated pace, when we think we've changed a route. Additionally every route change will cause us to relook at all nexthops we are tracking irrelevant if they are possibly related to the route change or not. Let's modify the code base to track the rnh's off of the rib table's rn, `rib_dest_t`. So after we process a node, install it into the data plane, in rib_process_result we can look at the `rib_dest_t` associated with the rn and see that a nexthop depended on this route node. If so, refigure it. Additionally we will store rnh's that are not resolved on the 0.0.0.0/0 nexthop tracking list. As such when a route node changes we can quickly walk up the rib tree and notice that it needs to be reprocessed as well. Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
/*
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* Zebra next hop tracking header
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* Copyright (C) 2013 Cumulus Networks, Inc.
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*
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* This file is part of GNU Zebra.
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*
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* GNU Zebra is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* GNU Zebra is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; see the file COPYING; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _ZEBRA_RNH_H
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#define _ZEBRA_RNH_H
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#include "prefix.h"
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#include "vty.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef enum { RNH_NEXTHOP_TYPE, RNH_IMPORT_CHECK_TYPE } rnh_type_t;
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/* Nexthop structure. */
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struct rnh {
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uint8_t flags;
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#define ZEBRA_NHT_CONNECTED 0x1
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#define ZEBRA_NHT_DELETED 0x2
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#define ZEBRA_NHT_EXACT_MATCH 0x4
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/* VRF identifier. */
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vrf_id_t vrf_id;
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afi_t afi;
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rnh_type_t type;
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uint32_t seqno;
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struct route_entry *state;
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struct prefix resolved_route;
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struct list *client_list;
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/* pseudowires dependent on this nh */
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struct list *zebra_pseudowire_list;
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struct route_node *node;
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/*
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* if this has been filtered for the client
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*/
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int filtered[ZEBRA_ROUTE_MAX];
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};
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extern int zebra_rnh_ip_default_route;
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extern int zebra_rnh_ipv6_default_route;
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extern void zebra_rnh_init(void);
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static inline int rnh_resolve_via_default(int family)
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{
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if (((family == AF_INET) && zebra_rnh_ip_default_route)
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|| ((family == AF_INET6) && zebra_rnh_ipv6_default_route))
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return 1;
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else
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return 0;
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}
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extern struct rnh *zebra_add_rnh(struct prefix *p, vrf_id_t vrfid,
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rnh_type_t type, bool *exists);
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extern struct rnh *zebra_lookup_rnh(struct prefix *p, vrf_id_t vrfid,
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rnh_type_t type);
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extern void zebra_free_rnh(struct rnh *rnh);
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extern void zebra_add_rnh_client(struct rnh *rnh, struct zserv *client,
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rnh_type_t type, vrf_id_t vrfid);
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extern void zebra_register_rnh_pseudowire(vrf_id_t, struct zebra_pw *);
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extern void zebra_deregister_rnh_pseudowire(vrf_id_t, struct zebra_pw *);
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extern void zebra_remove_rnh_client(struct rnh *rnh, struct zserv *client,
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rnh_type_t type);
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extern void zebra_evaluate_rnh(struct zebra_vrf *zvrf, afi_t afi, int force,
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rnh_type_t type, struct prefix *p);
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extern void zebra_print_rnh_table(vrf_id_t vrfid, afi_t afi, struct vty *vty,
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rnh_type_t);
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extern char *rnh_str(struct rnh *rnh, char *buf, int size);
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#ifdef __cplusplus
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}
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#endif
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#endif /*_ZEBRA_RNH_H */
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