File 0010-drbd-do-not-send-P_CURRENT_UUID-to-DRBD-8-... of Package drbd

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File 0010-drbd-do-not-send-P_CURRENT_UUID-to-DRBD-8-peer-when-.patch of Package drbd (Revision 9b15dc401a5ac4b247d86cd8bd6be1ab)

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From 1b94c10250c7d37423ba894457c40d9799025a93 Mon Sep 17 00:00:00 2001
From: Joel Colledge <joel.colledge@linbit.com>
Date: Mon, 11 Sep 2023 09:20:24 +0200
Subject: [PATCH 10/20] drbd: do not send P_CURRENT_UUID to DRBD 8 peer when
 our disk fails

DRBD 8 does not understand P_CURRENT_UUID. Skip the peer in
diskfull_peers_need_new_cur_uuid() to avoid sending such a packet.

This is valid because the DRBD 8 peer generates a new UUID itself when
our disk fails.

This prevents failures of the form:

drbd res: Unexpected data packet Unknown (0x0044)
drbd res: peer( Primary -> Unknown ) conn( Connected -> ProtocolError ) pdsk( Failed -> DUnknown )
---
 drbd/drbd_main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drbd/drbd_main.c b/drbd/drbd_main.c
index ccf0f72829db..e6ed1185c710 100644
--- a/drbd/drbd_main.c
+++ b/drbd/drbd_main.c
@@ -4614,6 +4614,9 @@ static bool diskfull_peers_need_new_cur_uuid(struct drbd_device *device)
 
 	rcu_read_lock();
 	for_each_peer_device_rcu(peer_device, device) {
+		if (peer_device->connection->agreed_pro_version < 110)
+			continue;
+
 		/* Only an up-to-date peer persists a new current uuid! */
 		if (peer_device->disk_state[NOW] < D_UP_TO_DATE)
 			continue;
-- 
2.35.3

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File 0010-drbd-do-not-send-P_CURRENT_UUID-to-DRBD-8-peer-when-.patch of Package drbd (Revision 9b15dc401a5ac4b247d86cd8bd6be1ab)

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