From de187a390838c0b3dfd00ae5399aa406d0a79f13 Mon Sep 17 00:00:00 2001 From: Sabrina Dubroca Date: Thu, 7 Nov 2024 00:13:31 +0100 Subject: [PATCH] macsec: inherit lower device's TSO limits when offloading 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 Reviewed-by: Simon Horman Link: https://patch.msgid.link/8240c0181e851f169d815f59658a01fb9dfc5073.1730929545.git.sd@queasysnail.net Signed-off-by: Jakub Kicinski --- drivers/net/macsec.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c index 351154dd92a6..1bc1e5993f56 100644 --- a/drivers/net/macsec.c +++ b/drivers/net/macsec.c @@ -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;