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zebra: Put NHE ref updating into a function

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When the referenced NHE changes for a route_entry, use this function
to handle it.

Signed-off-by: Stephen Worley <sworley@cumulusnetworks.com>
This commit is contained in:
Stephen Worley 2019-05-14 16:26:20 -07:00
parent 7f1abf7926
commit 144a1b34df
3 changed files with 26 additions and 15 deletions
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33
zebra/zebra_nhg.c
View File

@ -1493,17 +1493,7 @@ int nexthop_active_update(struct route_node *rn, struct route_entry *re)
new_nhe = zebra_nhg_rib_find(0, &new_grp, re->vrf_id, rt_afi);
if (new_nhe && (re->nhe_id != new_nhe->id)) {
struct nhg_hash_entry *old_nhe =
zebra_nhg_lookup_id(re->nhe_id);
re->ng = new_nhe->nhg;
re->nhe_id = new_nhe->id;
zebra_nhg_increment_ref(new_nhe);
if (old_nhe)
zebra_nhg_decrement_ref(old_nhe);
}
zebra_nhg_re_update_ref(re, new_nhe);
}
if (curr_active) {
@ -1532,6 +1522,27 @@ int nexthop_active_update(struct route_node *rn, struct route_entry *re)
return curr_active;
}
int zebra_nhg_re_update_ref(struct route_entry *re, struct nhg_hash_entry *new)
{
struct nhg_hash_entry *old = NULL;
if (!new)
return -1;
if (re->nhe_id != new->id) {
old = zebra_nhg_lookup_id(re->nhe_id);
re->ng = new->nhg;
re->nhe_id = new->id;
zebra_nhg_increment_ref(new);
if (old)
zebra_nhg_decrement_ref(old);
}
return 0;
}
/* Convert a nhe into a group array */
uint8_t zebra_nhg_nhe2grp(struct nh_grp *grp, struct nhg_hash_entry *nhe)
{

3
zebra/zebra_nhg.h
View File

@ -229,6 +229,9 @@ void zebra_nhg_set_if(struct nhg_hash_entry *nhe, struct interface *ifp);
extern int nexthop_active_update(struct route_node *rn, struct route_entry *re);
extern int zebra_nhg_re_update_ref(struct route_entry *re,
struct nhg_hash_entry *nhe);
extern uint8_t zebra_nhg_nhe2grp(struct nh_grp *grp,
struct nhg_hash_entry *nhe);

5
zebra/zebra_rib.c
View File

@ -2772,13 +2772,10 @@ int rib_add_multipath(afi_t afi, safi_t safi, struct prefix *p,
XFREE(MTYPE_RE, re);
return -1;
}
re->nhe_id = nhe->id;
}
/* Attach the re to the nhe's nexthop group */
zebra_nhg_increment_ref(nhe);
re->ng = nhe->nhg;
zebra_nhg_re_update_ref(re, nhe);
/* Make it sure prefixlen is applied to the prefix. */
apply_mask(p);