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authorHangbin Liu <liuhangbin@gmail.com>2023-08-23 10:19:04 +0300
committerPaolo Abeni <pabeni@redhat.com>2023-08-24 11:07:13 +0300
commite74216b8def3803e98ae536de78733e9d7f3b109 (patch)
tree13b3943f3da4a9030a6ff12b57d2a1cf6eceec3c /drivers/net/bonding
parent30188bd7838c16a98a520db1fe9df01ffc6ed368 (diff)
downloadlinux-e74216b8def3803e98ae536de78733e9d7f3b109.tar.xz
bonding: fix macvlan over alb bond support
The commit 14af9963ba1e ("bonding: Support macvlans on top of tlb/rlb mode bonds") aims to enable the use of macvlans on top of rlb bond mode. However, the current rlb bond mode only handles ARP packets to update remote neighbor entries. This causes an issue when a macvlan is on top of the bond, and remote devices send packets to the macvlan using the bond's MAC address as the destination. After delivering the packets to the macvlan, the macvlan will rejects them as the MAC address is incorrect. Consequently, this commit makes macvlan over bond non-functional. To address this problem, one potential solution is to check for the presence of a macvlan port on the bond device using netif_is_macvlan_port(bond->dev) and return NULL in the rlb_arp_xmit() function. However, this approach doesn't fully resolve the situation when a VLAN exists between the bond and macvlan. So let's just do a partial revert for commit 14af9963ba1e in rlb_arp_xmit(). As the comment said, Don't modify or load balance ARPs that do not originate locally. Fixes: 14af9963ba1e ("bonding: Support macvlans on top of tlb/rlb mode bonds") Reported-by: susan.zheng@veritas.com Closes: https://bugzilla.redhat.com/show_bug.cgi?id=2117816 Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Acked-by: Jay Vosburgh <jay.vosburgh@canonical.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'drivers/net/bonding')
-rw-r--r--drivers/net/bonding/bond_alb.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index b9dbad3a8af8..fc5da5d7744d 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -660,10 +660,10 @@ static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond)
return NULL;
arp = (struct arp_pkt *)skb_network_header(skb);
- /* Don't modify or load balance ARPs that do not originate locally
- * (e.g.,arrive via a bridge).
+ /* Don't modify or load balance ARPs that do not originate
+ * from the bond itself or a VLAN directly above the bond.
*/
- if (!bond_slave_has_mac_rx(bond, arp->mac_src))
+ if (!bond_slave_has_mac_rcu(bond, arp->mac_src))
return NULL;
dev = ip_dev_find(dev_net(bond->dev), arp->ip_src);