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macsec: inherit lower device's TSO limits when offloading

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If macsec is offloaded, we need to follow the lower device's
capabilities, like VLAN devices do.

Leave the limits unchanged when the offload is disabled.

Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/8240c0181e851f169d815f59658a01fb9dfc5073.1730929545.git.sd@queasysnail.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Sabrina Dubroca 2024-11-07 00:13:31 +01:00 committed by Jakub Kicinski
parent f29d24a210
commit de187a3908
1 changed files with 22 additions and 0 deletions
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22
drivers/net/macsec.c
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@ -2621,6 +2621,17 @@ static void macsec_set_head_tail_room(struct net_device *dev)
dev->needed_tailroom = real_dev->needed_tailroom + needed_tailroom;
}
static void macsec_inherit_tso_max(struct net_device *dev)
{
struct macsec_dev *macsec = macsec_priv(dev);
/* if macsec is offloaded, we need to follow the lower
* device's capabilities. otherwise, we can ignore them.
*/
if (macsec_is_offloaded(macsec))
netif_inherit_tso_max(dev, macsec->real_dev);
}
static int macsec_update_offload(struct net_device *dev, enum macsec_offload offload)
{
enum macsec_offload prev_offload;
@ -2666,6 +2677,8 @@ static int macsec_update_offload(struct net_device *dev, enum macsec_offload off
macsec_set_head_tail_room(dev);
macsec->insert_tx_tag = macsec_needs_tx_tag(macsec, ops);
macsec_inherit_tso_max(dev);
netdev_update_features(dev);
return ret;
@ -3537,6 +3550,8 @@ static int macsec_dev_init(struct net_device *dev)
if (err)
return err;
macsec_inherit_tso_max(dev);
dev->hw_features = real_dev->hw_features & MACSEC_OFFLOAD_FEATURES;
dev->hw_features |= NETIF_F_GSO_SOFTWARE;
@ -4479,6 +4494,13 @@ static int macsec_notify(struct notifier_block *this, unsigned long event,
if (dev->mtu > mtu)
dev_set_mtu(dev, mtu);
}
break;
case NETDEV_FEAT_CHANGE:
list_for_each_entry(m, &rxd->secys, secys) {
macsec_inherit_tso_max(m->secy.netdev);
netdev_update_features(m->secy.netdev);
}
break;
}
return NOTIFY_OK;