frr/0006-graceful-restart.patch

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From 12f9f8472d0f8cfc026352906b8e5342df2846cc Mon Sep 17 00:00:00 2001
From: Donatas Abraitis <donatas@opensourcerouting.org>
Date: Tue, 27 Sep 2022 17:30:16 +0300
Subject: [PATCH] bgpd: Do not send Deconfig/Shutdown message when restarting
We might disable sending unconfig/shutdown notifications when
Graceful-Restart is enabled and negotiated.
Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
---
bgpd/bgpd.c | 35 ++++++++++++++++++++++++++---------
1 file changed, 26 insertions(+), 9 deletions(-)
diff --git a/bgpd/bgpd.c b/bgpd/bgpd.c
index 749e46ebe9d..ae1308db423 100644
--- a/bgpd/bgpd.c
+++ b/bgpd/bgpd.c
@@ -2755,11 +2755,34 @@ int peer_group_remote_as(struct bgp *bgp, const char *group_name, as_t *as,
void peer_notify_unconfig(struct peer *peer)
{
+ if (BGP_PEER_GRACEFUL_RESTART_CAPABLE(peer)) {
+ if (bgp_debug_neighbor_events(peer))
+ zlog_debug(
+ "%pBP configured Graceful-Restart, skipping unconfig notification",
+ peer);
+ return;
+ }
+
if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
bgp_notify_send(peer, BGP_NOTIFY_CEASE,
BGP_NOTIFY_CEASE_PEER_UNCONFIG);
}
+static void peer_notify_shutdown(struct peer *peer)
+{
+ if (BGP_PEER_GRACEFUL_RESTART_CAPABLE(peer)) {
+ if (bgp_debug_neighbor_events(peer))
+ zlog_debug(
+ "%pBP configured Graceful-Restart, skipping shutdown notification",
+ peer);
+ return;
+ }
+
+ if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
+ bgp_notify_send(peer, BGP_NOTIFY_CEASE,
+ BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN);
+}
+
void peer_group_notify_unconfig(struct peer_group *group)
{
struct peer *peer, *other;
@@ -3676,11 +3699,8 @@ int bgp_delete(struct bgp *bgp)
}
/* Inform peers we're going down. */
- for (ALL_LIST_ELEMENTS(bgp->peer, node, next, peer)) {
- if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
- bgp_notify_send(peer, BGP_NOTIFY_CEASE,
- BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN);
- }
+ for (ALL_LIST_ELEMENTS(bgp->peer, node, next, peer))
+ peer_notify_shutdown(peer);
/* Delete static routes (networks). */
bgp_static_delete(bgp);
@@ -8252,10 +8272,7 @@ void bgp_terminate(void)
for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp))
for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer))
- if (peer_established(peer) || peer->status == OpenSent
- || peer->status == OpenConfirm)
- bgp_notify_send(peer, BGP_NOTIFY_CEASE,
- BGP_NOTIFY_CEASE_PEER_UNCONFIG);
+ peer_notify_unconfig(peer);
BGP_TIMER_OFF(bm->t_rmap_update);