[PATCH 6.18 060/333] bonding: use common function to compute the features

Greg Kroah-Hartman
2026-03-17T17:08:33Z

From: Hangbin Liu <liuhangbin@gmail.com>

[ Upstream commit d4fde269a970666a30dd3abd0413273a06dd972d ]

Use the new functon netdev_compute_master_upper_features() to compute the bonding
features.

Note that bond_compute_features() currently uses bond_for_each_slave()
to traverse the lower devices list, and that is just a macro wrapper of
netdev_for_each_lower_private(). We use similar helper
netdev_for_each_lower_dev() in netdev_compute_master_upper_features() to
iterate the slave device, as there is not need to get the private data.

No functional change intended.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://patch.msgid.link/20251017034155.61990-3-liuhangbin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 950803f72547 ("bonding: fix type confusion in bond_setup_by_slave()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/bonding/bond_main.c | 99 ++-------------------------------
1 file changed, 4 insertions(+), 95 deletions(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 322f910b06fc8..8be99ae67b77f 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1476,97 +1476,6 @@ static netdev_features_t bond_fix_features(struct net_device *dev,
return features;
}

-#define BOND_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
- NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | \
- NETIF_F_GSO_ENCAP_ALL | \
- NETIF_F_HIGHDMA | NETIF_F_LRO)
-
-#define BOND_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
- NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE | \
- NETIF_F_GSO_PARTIAL)
-
-#define BOND_MPLS_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
- NETIF_F_GSO_SOFTWARE)
-
-#define BOND_GSO_PARTIAL_FEATURES (NETIF_F_GSO_ESP)
-
-
-static void bond_compute_features(struct bonding *bond)
-{
- netdev_features_t gso_partial_features = BOND_GSO_PARTIAL_FEATURES;
- unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
- IFF_XMIT_DST_RELEASE_PERM;
- netdev_features_t vlan_features = BOND_VLAN_FEATURES;
- netdev_features_t enc_features = BOND_ENC_FEATURES;
-#ifdef CONFIG_XFRM_OFFLOAD
- netdev_features_t xfrm_features = BOND_XFRM_FEATURES;
-#endif /* CONFIG_XFRM_OFFLOAD */
- netdev_features_t mpls_features = BOND_MPLS_FEATURES;
- struct net_device *bond_dev = bond->dev;
- struct list_head *iter;
- struct slave *slave;
- unsigned short max_hard_header_len = ETH_HLEN;
- unsigned int tso_max_size = TSO_MAX_SIZE;
- u16 tso_max_segs = TSO_MAX_SEGS;
-
- if (!bond_has_slaves(bond))
- goto done;
-
- vlan_features = netdev_base_features(vlan_features);
- mpls_features = netdev_base_features(mpls_features);
-
- bond_for_each_slave(bond, slave, iter) {
- vlan_features = netdev_increment_features(vlan_features,
- slave->dev->vlan_features, BOND_VLAN_FEATURES);
-
- enc_features = netdev_increment_features(enc_features,
- slave->dev->hw_enc_features,
- BOND_ENC_FEATURES);
-
-#ifdef CONFIG_XFRM_OFFLOAD
- xfrm_features = netdev_increment_features(xfrm_features,
- slave->dev->hw_enc_features,
- BOND_XFRM_FEATURES);
-#endif /* CONFIG_XFRM_OFFLOAD */
-
- gso_partial_features = netdev_increment_features(gso_partial_features,
- slave->dev->gso_partial_features,
- BOND_GSO_PARTIAL_FEATURES);
-
- mpls_features = netdev_increment_features(mpls_features,
- slave->dev->mpls_features,
- BOND_MPLS_FEATURES);
-
- dst_release_flag &= slave->dev->priv_flags;
- if (slave->dev->hard_header_len > max_hard_header_len)
- max_hard_header_len = slave->dev->hard_header_len;
-
- tso_max_size = min(tso_max_size, slave->dev->tso_max_size);
- tso_max_segs = min(tso_max_segs, slave->dev->tso_max_segs);
- }
- bond_dev->hard_header_len = max_hard_header_len;
-
-done:
- bond_dev->gso_partial_features = gso_partial_features;
- bond_dev->vlan_features = vlan_features;
- bond_dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
- NETIF_F_HW_VLAN_CTAG_TX |
- NETIF_F_HW_VLAN_STAG_TX;
-#ifdef CONFIG_XFRM_OFFLOAD
- bond_dev->hw_enc_features |= xfrm_features;
-#endif /* CONFIG_XFRM_OFFLOAD */
- bond_dev->mpls_features = mpls_features;
- netif_set_tso_max_segs(bond_dev, tso_max_segs);
- netif_set_tso_max_size(bond_dev, tso_max_size);
-
- bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
- if ((bond_dev->priv_flags & IFF_XMIT_DST_RELEASE_PERM) &&
- dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
- bond_dev->priv_flags |= IFF_XMIT_DST_RELEASE;
-
- netdev_change_features(bond_dev);
-}
-
static void bond_setup_by_slave(struct net_device *bond_dev,
struct net_device *slave_dev)
{
@@ -2287,7 +2196,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
}

bond->slave_cnt++;
- bond_compute_features(bond);
+ netdev_compute_master_upper_features(bond->dev, true);
bond_set_carrier(bond);

/* Needs to be called before bond_select_active_slave(), which will
@@ -2542,7 +2451,7 @@ static int __bond_release_one(struct net_device *bond_dev,
call_netdevice_notifiers(NETDEV_RELEASE, bond->dev);
}

- bond_compute_features(bond);
+ netdev_compute_master_upper_features(bond->dev, true);
if (!(bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
(old_features & NETIF_F_VLAN_CHALLENGED))
slave_info(bond_dev, slave_dev, "last VLAN challenged slave left bond - VLAN blocking is removed\n");
@@ -4050,7 +3959,7 @@ static int bond_slave_netdev_event(unsigned long event,
case NETDEV_FEAT_CHANGE:
if (!bond->notifier_ctx) {
bond->notifier_ctx = true;
- bond_compute_features(bond);
+ netdev_compute_master_upper_features(bond->dev, true);
bond->notifier_ctx = false;
}
break;
@@ -6043,7 +5952,7 @@ void bond_setup(struct net_device *bond_dev)
* capable
*/

- bond_dev->hw_features = BOND_VLAN_FEATURES |
+ bond_dev->hw_features = MASTER_UPPER_DEV_VLAN_FEATURES |
NETIF_F_HW_VLAN_CTAG_RX |
NETIF_F_HW_VLAN_CTAG_FILTER |
NETIF_F_HW_VLAN_STAG_RX |
--
2.51.0