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pimd: Remove possibility of trying to send Register when no RPF

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On shutdown processing we may have gotten a interface down event
which might clear the rpf interface and we might trigger a
work queue item on the vxlan_sg to send a NULL register.

Ensure that we cannot attempt to do the impossible.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
This commit is contained in:
Donald Sharp 2020-02-26 09:47:28 -05:00
parent 3c582f627a
commit 7a11dc746f
1 changed files with 10 additions and 2 deletions
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8
pimd/pim_vxlan.c
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@ -85,9 +85,17 @@ static void pim_vxlan_do_reg_work(void)
if (PIM_DEBUG_VXLAN) if (PIM_DEBUG_VXLAN)
zlog_debug("vxlan SG %s periodic NULL register", zlog_debug("vxlan SG %s periodic NULL register",
vxlan_sg->sg_str); vxlan_sg->sg_str);
/*
* If we are on the work queue *and* the rpf
* has been lost on the vxlan_sg->up let's
* make sure that we don't send it.
*/
if (vxlan_sg->up->rpf.source_nexthop.interface) {
pim_null_register_send(vxlan_sg->up); pim_null_register_send(vxlan_sg->up);
++work_cnt; ++work_cnt;
} }
}
if (work_cnt > vxlan_info.max_work_cnt) { if (work_cnt > vxlan_info.max_work_cnt) {
vxlan_info.next_work = listnode->next; vxlan_info.next_work = listnode->next;