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zebra: multipath number checks with NHG proto

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Get the multipath number checks working with proto-based NHG
message decoding in zapi_msg.c

Modify the function that checks this for routes to work without
being passed a prefix as is the case with NHG creates.

Signed-off-by: Stephen Worley <sworley@cumulusnetworks.com>
This commit is contained in:
Stephen Worley 2020-07-22 14:02:11 -04:00
parent 8155e8c592
commit e270f004ae
1 changed files with 9 additions and 10 deletions
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19
zebra/zapi_msg.c
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@ -1445,11 +1445,14 @@ bool zserv_nexthop_num_warn(const char *caller, const struct prefix *p,
if (nexthop_num > zrouter.multipath_num) {
char buff[PREFIX2STR_BUFFER];
prefix2str(p, buff, sizeof(buff));
if (p)
prefix2str(p, buff, sizeof(buff));
flog_warn(
EC_ZEBRA_MORE_NH_THAN_MULTIPATH,
"%s: Prefix %s has %d nexthops, but we can only use the first %d",
caller, buff, nexthop_num, zrouter.multipath_num);
caller, (p ? buff : "(NULL)"), nexthop_num,
zrouter.multipath_num);
return true;
}
@ -1767,21 +1770,17 @@ static void zread_nhg_reader(ZAPI_HANDLER_ARGS)
size_t nhops, i;
struct zapi_nexthop zapi_nexthops[MULTIPATH_NUM];
struct nexthop_group *nhg = NULL;
struct prefix p;
uint16_t proto;
struct nhg_hash_entry *nhe;
memset(&p, 0, sizeof(p));
s = msg;
STREAM_GETW(s, proto);
STREAM_GETL(s, id);
STREAM_GETW(s, nhops);
// TODO: Can't use this without a prefix.
// if (zserv_nexthop_num_warn(__func__, &p, nhops))
// return;
if (zserv_nexthop_num_warn(__func__, NULL, nhops))
return;
if (nhops <= 0) {
flog_warn(EC_ZEBRA_NEXTHOP_CREATION_FAILED,
@ -1800,8 +1799,8 @@ static void zread_nhg_reader(ZAPI_HANDLER_ARGS)
}
}
if (!zapi_read_nexthops(client, &p, zapi_nexthops, 0, 0, nhops, 0, &nhg,
NULL)) {
if (!zapi_read_nexthops(client, NULL, zapi_nexthops, 0, 0, nhops, 0,
&nhg, NULL)) {
flog_warn(EC_ZEBRA_NEXTHOP_CREATION_FAILED,
"%s: Nexthop Group Creation failed",
__func__);