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zebra: Re-evaluate the nexthop tracking if flags changed

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Routing protocols are allowed ( and even encouraged ) to modify
the flags that influence the nexthop tracking.  As such when
we modify the tracking of a nexthop to go from, say, connected force
or not we must re-evaluate the nexthop and send the results
up to the interested parties.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
This commit is contained in:
Donald Sharp 2019-02-21 16:10:56 -05:00
parent 9cb8322ed9
commit 906b54ddba
1 changed files with 7 additions and 1 deletions
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8
zebra/zapi_msg.c
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@ -1036,6 +1036,8 @@ static void zread_rnh_register(ZAPI_HANDLER_ARGS)
uint8_t flags = 0; uint8_t flags = 0;
uint16_t type = cmd2type[hdr->command]; uint16_t type = cmd2type[hdr->command];
bool exist; bool exist;
bool flag_changed = false;
uint8_t orig_flags;
if (IS_ZEBRA_DEBUG_NHT) if (IS_ZEBRA_DEBUG_NHT)
zlog_debug( zlog_debug(
@ -1084,6 +1086,7 @@ static void zread_rnh_register(ZAPI_HANDLER_ARGS)
if (!rnh) if (!rnh)
return; return;
orig_flags = rnh->flags;
if (type == RNH_NEXTHOP_TYPE) { if (type == RNH_NEXTHOP_TYPE) {
if (flags if (flags
&& !CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED)) && !CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED))
@ -1101,9 +1104,12 @@ static void zread_rnh_register(ZAPI_HANDLER_ARGS)
UNSET_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH); UNSET_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH);
} }
if (orig_flags != rnh->flags)
flag_changed = true;
zebra_add_rnh_client(rnh, client, type, zvrf_id(zvrf)); zebra_add_rnh_client(rnh, client, type, zvrf_id(zvrf));
/* Anything not AF_INET/INET6 has been filtered out above */ /* Anything not AF_INET/INET6 has been filtered out above */
if (!exist) if (!exist || flag_changed)
zebra_evaluate_rnh(zvrf, family2afi(p.family), 1, type, zebra_evaluate_rnh(zvrf, family2afi(p.family), 1, type,
&p); &p);
} }