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

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.

Steffen Klassert committed 6 years ago

Commit 1a3c9981 parent 3b335832 files · +4 −1Browse files

Unified · Split

2 files
  1. include/linux/netdev_features.h +3 −0
  2. net/core/dev.c +1 −1
include/linux/netdev_features.h+3−0
@@ -230,6 +230,9 @@ static inline int find_next_netdev_feature(u64 feature, unsigned long start) · 229 unmodified lines
230230 /* changeable features with no special hardware requirements */
231231 #define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO)
232232
233+/* Changeable features with no special hardware requirements that defaults to off. */
234+#define NETIF_F_SOFT_FEATURES_OFF NETIF_F_GRO_FRAGLIST
235+
233236 #define NETIF_F_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_FILTER | \
234237 NETIF_F_HW_VLAN_CTAG_RX | \
235238 NETIF_F_HW_VLAN_CTAG_TX | \
net/core/dev.c+1−1
@@ -9283,7 +9283,7 @@ int register_netdevice(struct net_device *dev) · 9282 unmodified lines
92839283 /* Transfer changeable features to wanted_features and enable
92849284 * software offloads (GSO and GRO).
92859285 */
9286− dev->hw_features |= NETIF_F_SOFT_FEATURES;
9286+ dev->hw_features |= (NETIF_F_SOFT_FEATURES | NETIF_F_SOFT_FEATURES_OFF);
92879287 dev->features |= NETIF_F_SOFT_FEATURES;
92889288
92899289 if (dev->netdev_ops->ndo_udp_tunnel_add) {