mirror of
https://git.openwrt.org/openwrt/openwrt.git
synced 2024-11-28 07:44:32 +00:00
2a1daeaabd
Fix conditions for handling offloaded packets Fixes: #13430 Signed-off-by: Leon M. Busch-George <leon@georgemail.eu> Signed-off-by: Felix Fietkau <nbd@nbd.name>
39 lines
1.6 KiB
Diff
39 lines
1.6 KiB
Diff
From: "Leon M. Busch-George" <leon@georgemail.eu>
|
|
Date: Sun, 20 Oct 2024 18:20:14 +0200
|
|
Subject: [PATCH] net: bridge: switchdev: Don't drop packets between ports with
|
|
no hwdom
|
|
|
|
nbp_switchdev_allowed_egress uses hwdom to determine whether or not a
|
|
packet has already been forwarded to a hardware domain. For
|
|
net_bridge_ports that aren't set up to use forward offloading, hwdom is
|
|
set to 0. When both ingress and egress port have no hwdom,
|
|
'cb->src_hwdom != p->hwdom' indicates that the packet is already known in
|
|
the target domain - which it isn't - and the packet is wrongly dropped.
|
|
|
|
The error was found on a bridge containing a wifi device and a VLAN
|
|
tagging device (e.g. eth0.12). With VLAN filtering, this shouldn't happen.
|
|
|
|
This patch adds a check for p->hwdom != 0 before comparing hardware
|
|
domains to restore forwarding between ports with hwdom = 0.
|
|
|
|
fwd_hwdoms are only set for ports with offloading enabled, which also
|
|
implies a valid hwdom, so the check '!test_bit(p->hwdom, &cb->fwd_hwdoms)'
|
|
doesn't fail in this way (yet - fingers crossed..) and it is left in place.
|
|
|
|
Co-developed-by: Felix Fietkau <nbd@nbd.name>
|
|
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
Signed-off-by: Leon M. Busch-George <leon@georgemail.eu>
|
|
---
|
|
|
|
--- a/net/bridge/br_switchdev.c
|
|
+++ b/net/bridge/br_switchdev.c
|
|
@@ -67,7 +67,7 @@ bool nbp_switchdev_allowed_egress(const
|
|
struct br_input_skb_cb *cb = BR_INPUT_SKB_CB(skb);
|
|
|
|
return !test_bit(p->hwdom, &cb->fwd_hwdoms) &&
|
|
- (!skb->offload_fwd_mark || cb->src_hwdom != p->hwdom);
|
|
+ (!skb->offload_fwd_mark || !p->hwdom || cb->src_hwdom != p->hwdom);
|
|
}
|
|
|
|
/* Flags that can be offloaded to hardware */
|