From 62c71b45e8537b8cb746cc929ea05ba0258e0b5a Mon Sep 17 00:00:00 2001
From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Mon, 20 Nov 2017 15:21:57 -0800
Subject: [PATCH] bpf: offload: ignore namespace moves
We are currently destroying the device offload state when device
moves to another net namespace. This doesn't break with current
NFP code, because offload state is not used on program removal,
but it's not correct behaviour.
Ignore the device unregister notifications on namespace move.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
---
kernel/bpf/offload.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/kernel/bpf/offload.c b/kernel/bpf/offload.c
index a778e5df7e265..d4267c674fec1 100644
--- a/kernel/bpf/offload.c
+++ b/kernel/bpf/offload.c
@@ -174,6 +174,10 @@ static int bpf_offload_notification(struct notifier_block *notifier,
switch (event) {
case NETDEV_UNREGISTER:
+ /* ignore namespace changes */
+ if (netdev->reg_state != NETREG_UNREGISTERING)
+ break;
+
list_for_each_entry_safe(offload, tmp, &bpf_prog_offload_devs,
offloads) {
if (offload->netdev == netdev)
--
2.30.2