[PATCH net] Bonding: Fix support for gso_partial_features

Hangbin Liu
2025-01-21T08:55:39Z

The fixed commit adds NETIF_F_GSO_ESP bit for bonding gso_partial_features.
However, if we don't set the dev NETIF_F_GSO_PARTIAL bit, the later
netdev_change_features() -> netdev_fix_features() will remove the
NETIF_F_GSO_ESP bit from the dev features. This causes ethtool to show
that the bond does not support tx-esp-segmentation. For example

# ethtool -k bond0 | grep esp
tx-esp-segmentation: off [requested on]
esp-hw-offload: on
esp-tx-csum-hw-offload: on

Add the NETIF_F_GSO_PARTIAL bit to bond dev features when set
gso_partial_features to fix this issue.

Fixes: 4861333b4217 ("bonding: add ESP offload features when slaves support")
Reported-by: Liang Li <liali@redhat.com>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
---
drivers/net/bonding/bond_main.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 7b78c2bada81..e1c054416d5e 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1598,10 +1598,12 @@ static void bond_compute_features(struct bonding *bond)
}
bond_dev->hard_header_len = max_hard_header_len;

- if (gso_partial_features & NETIF_F_GSO_ESP)
+ if (gso_partial_features & NETIF_F_GSO_ESP) {
bond_dev->gso_partial_features |= NETIF_F_GSO_ESP;
- else
+ bond_dev->features |= NETIF_F_GSO_PARTIAL;
+ } else {
bond_dev->gso_partial_features &= ~NETIF_F_GSO_ESP;
+ }

done:
bond_dev->vlan_features = vlan_features;
--
2.39.5 (Apple Git-154)