@@ -2654,11 +2654,6 @@ static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
if (ret)
goto rollback;
- /* Force features update, since they are different for SW MACSec and
- * HW offloading cases.
- */
- netdev_update_features(dev);
-
rtnl_unlock();
return 0;
@@ -3432,16 +3427,9 @@ static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
return ret;
}
-#define SW_MACSEC_FEATURES \
+#define MACSEC_FEATURES \
(NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
-/* If h/w offloading is enabled, use real device features save for
- * VLAN_FEATURES - they require additional ops
- * HW_MACSEC - no reason to report it
- */
-#define REAL_DEV_FEATURES(dev) \
- ((dev)->features & ~(NETIF_F_VLAN_FEATURES | NETIF_F_HW_MACSEC))
-
static int macsec_dev_init(struct net_device *dev)
{
struct macsec_dev *macsec = macsec_priv(dev);
@@ -3458,12 +3446,8 @@ static int macsec_dev_init(struct net_device *dev)
return err;
}
- if (macsec_is_offloaded(macsec)) {
- dev->features = REAL_DEV_FEATURES(real_dev);
- } else {
- dev->features = real_dev->features & SW_MACSEC_FEATURES;
- dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
- }
+ dev->features = real_dev->features & MACSEC_FEATURES;
+ dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
dev->needed_headroom = real_dev->needed_headroom +
MACSEC_NEEDED_HEADROOM;
@@ -3495,10 +3479,7 @@ static netdev_features_t macsec_fix_features(struct net_device *dev,
struct macsec_dev *macsec = macsec_priv(dev);
struct net_device *real_dev = macsec->real_dev;
- if (macsec_is_offloaded(macsec))
- return REAL_DEV_FEATURES(real_dev);
-
- features &= (real_dev->features & SW_MACSEC_FEATURES) |
+ features &= (real_dev->features & MACSEC_FEATURES) |
NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
features |= NETIF_F_LLTX;
This reverts commit c850240b6c4132574a00f2da439277ab94265b66. Copying the features of the real device doesn't work when it also supports IPsec offload, because then we'll have a device with NETIF_F_HW_ESP but no netdev->xfrmdev_ops. Example perf trace when running ip link add link eni1np1 type macsec port 4 offload mac ip 737 [003] 795.477676: probe:xfrm_dev_event__REGISTER name="macsec0" features=0x1c000080014869 xfrm_dev_event+0x3a notifier_call_chain+0x47 register_netdevice+0x846 macsec_newlink+0x25a ip 737 [003] 795.477687: probe:xfrm_dev_event__return ret=0x8002 (NOTIFY_BAD) notifier_call_chain+0x47 register_netdevice+0x846 macsec_newlink+0x25a dev->features includes NETIF_F_HW_ESP (0x04000000000000), so xfrm_api_check returns NOTIFY_BAD because we don't have dev->xfrmdev_ops on the macsec device. We could probably propagate GSO and a few other features from the lower device, similar to macvlan. This will be done in a future patch. Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> --- drivers/net/macsec.c | 27 ++++----------------------- 1 file changed, 4 insertions(+), 23 deletions(-)