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1d30d1f4a8
The code prior to this change, was allowing clients to register for nexthop tracking. Then zebra would look up the rnh and send to that particular client any known data. Additionally zebra was blindly re-evaluating the rnh for every registration. This leads to interesting behavior in that all people registered for that nexthop will get callbacks even if nothing changes. Modify the code to know if we have evaluated the rnh or not and if so limit the re-evaluation to when absolutely necessary This is of particular importance to do because of nht callbacks for protocols cause those protocols to do not insignificant work and as more protocols are registering for nht callbacks we will cause more work than is necessary. Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
88 lines
2.7 KiB
C
88 lines
2.7 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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/* 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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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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typedef enum { RNH_NEXTHOP_TYPE, RNH_IMPORT_CHECK_TYPE } rnh_type_t;
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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_delete_rnh(struct rnh *rnh, rnh_type_t type);
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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(vrf_id_t vrfid, int family, 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, int family, 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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#endif /*_ZEBRA_RNH_H */
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