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net: Add a netdev software feature set that defaults to off.

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The previous patch added the NETIF_F_GRO_FRAGLIST feature.
This is a software feature that should default to off.
Current software features default to on, so add a new
feature set that defaults to off.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Steffen Klassert 2020-01-25 11:26:43 +01:00 committed by David S. Miller
parent 3b33583265
commit 1a3c998f3a
2 changed files with 4 additions and 1 deletions
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3
include/linux/netdev_features.h
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@ -230,6 +230,9 @@ static inline int find_next_netdev_feature(u64 feature, unsigned long start)
/* changeable features with no special hardware requirements */
#define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO)
/* Changeable features with no special hardware requirements that defaults to off. */
#define NETIF_F_SOFT_FEATURES_OFF NETIF_F_GRO_FRAGLIST
#define NETIF_F_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_FILTER | \
NETIF_F_HW_VLAN_CTAG_RX | \
NETIF_F_HW_VLAN_CTAG_TX | \

2
net/core/dev.c
View File

@ -9283,7 +9283,7 @@ int register_netdevice(struct net_device *dev)
/* Transfer changeable features to wanted_features and enable
* software offloads (GSO and GRO).
*/
dev->hw_features |= NETIF_F_SOFT_FEATURES;
dev->hw_features |= (NETIF_F_SOFT_FEATURES | NETIF_F_SOFT_FEATURES_OFF);
dev->features |= NETIF_F_SOFT_FEATURES;
if (dev->netdev_ops->ndo_udp_tunnel_add) {