[PATCH 6.18 445/752] team: use common function to compute the features

Sasha Levin
2026-02-28T17:54:21Z

From: Hangbin Liu <liuhangbin@gmail.com>

[ Upstream commit 745cd46c2a47144dd656185b9be0a1e5e9b02d2d ]

Use the new helper netdev_compute_master_upper_features() to compute the
team device features. This helper performs both the feature computation
and the netdev_change_features() call.

Note that such change replace the lower layer traversing currently done
using team->port_list with netdev_for_each_lower_dev(). Such change is
safe as `port_list` contains exactly the same elements as
`team->dev->adj_list.lower` and the helper is always invoked under the
RTNL lock.

With this change, the explicit netdev_change_features() in team_add_slave()
can be safely removed, as team_port_add() already takes care of the
notification via netdev_compute_master_upper_features(), and same thing for
team_del_slave()

This also fixes missing computations for MPLS, XFRM, and TSO/GSO partial
features.

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/20251017034155.61990-4-liuhangbin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: bb4c698633c0 ("team: avoid NETDEV_CHANGEMTU event when unregistering slave")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/team/team_core.c | 83 +++---------------------------------
1 file changed, 6 insertions(+), 77 deletions(-)

diff --git a/drivers/net/team/team_core.c b/drivers/net/team/team_core.c
index 2fd3469d10464..d5da2f0774637 100644
--- a/drivers/net/team/team_core.c
+++ b/drivers/net/team/team_core.c
@@ -982,63 +982,6 @@ static void team_port_disable(struct team *team,
team_lower_state_changed(port);
}

-#define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
- NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | \
- NETIF_F_HIGHDMA | NETIF_F_LRO | \
- NETIF_F_GSO_ENCAP_ALL)
-
-#define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
- NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE)
-
-static void __team_compute_features(struct team *team)
-{
- struct team_port *port;
- netdev_features_t vlan_features = TEAM_VLAN_FEATURES;
- netdev_features_t enc_features = TEAM_ENC_FEATURES;
- unsigned short max_hard_header_len = ETH_HLEN;
- unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
- IFF_XMIT_DST_RELEASE_PERM;
-
- rcu_read_lock();
- if (list_empty(&team->port_list))
- goto done;
-
- vlan_features = netdev_base_features(vlan_features);
- enc_features = netdev_base_features(enc_features);
-
- list_for_each_entry_rcu(port, &team->port_list, list) {
- vlan_features = netdev_increment_features(vlan_features,
- port->dev->vlan_features,
- TEAM_VLAN_FEATURES);
- enc_features =
- netdev_increment_features(enc_features,
- port->dev->hw_enc_features,
- TEAM_ENC_FEATURES);
-
- dst_release_flag &= port->dev->priv_flags;
- if (port->dev->hard_header_len > max_hard_header_len)
- max_hard_header_len = port->dev->hard_header_len;
- }
-done:
- rcu_read_unlock();
-
- team->dev->vlan_features = vlan_features;
- team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
- NETIF_F_HW_VLAN_CTAG_TX |
- NETIF_F_HW_VLAN_STAG_TX;
- team->dev->hard_header_len = max_hard_header_len;
-
- team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
- if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
- team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
-}
-
-static void team_compute_features(struct team *team)
-{
- __team_compute_features(team);
- netdev_change_features(team->dev);
-}
-
static int team_port_enter(struct team *team, struct team_port *port)
{
int err = 0;
@@ -1306,7 +1249,7 @@ static int team_port_add(struct team *team, struct net_device *port_dev,
port->index = -1;
list_add_tail_rcu(&port->list, &team->port_list);
team_port_enable(team, port);
- __team_compute_features(team);
+ netdev_compute_master_upper_features(team->dev, true);
__team_port_change_port_added(port, !!netif_oper_up(port_dev));
__team_options_change_check(team);

@@ -1389,7 +1332,7 @@ static int team_port_del(struct team *team, struct net_device *port_dev)
dev_set_mtu(port_dev, port->orig.mtu);
kfree_rcu(port, rcu);
netdev_info(dev, "Port device %s removed\n", portname);
- __team_compute_features(team);
+ netdev_compute_master_upper_features(team->dev, true);

return 0;
}
@@ -1977,33 +1920,19 @@ static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
struct netlink_ext_ack *extack)
{
struct team *team = netdev_priv(dev);
- int err;

ASSERT_RTNL();

- err = team_port_add(team, port_dev, extack);
-
- if (!err)
- netdev_change_features(dev);
-
- return err;
+ return team_port_add(team, port_dev, extack);
}

static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
{
struct team *team = netdev_priv(dev);
- int err;

ASSERT_RTNL();

- err = team_port_del(team, port_dev);
-
- if (err)
- return err;
-
- netdev_change_features(dev);
-
- return err;
+ return team_port_del(team, port_dev);
}

static netdev_features_t team_fix_features(struct net_device *dev,
@@ -2197,7 +2126,7 @@ static void team_setup(struct net_device *dev)

dev->features |= NETIF_F_GRO;

- dev->hw_features = TEAM_VLAN_FEATURES |
+ 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 |
@@ -3001,7 +2930,7 @@ static int team_device_event(struct notifier_block *unused,
case NETDEV_FEAT_CHANGE:
if (!port->team->notifier_ctx) {
port->team->notifier_ctx = true;
- team_compute_features(port->team);
+ netdev_compute_master_upper_features(port->team->dev, true);
port->team->notifier_ctx = false;
}
break;
--
2.51.0