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net: Eliminate NETIF_F_GEN_CSUM and NETIF_F_V[46]_CSUM

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These netif flags are unnecessary convolutions. It is more
straightforward to just use NETIF_F_HW_CSUM, NETIF_F_IP_CSUM,
and NETIF_F_IPV6_CSUM directly.

This patch also:
    - Cleans up can_checksum_protocol
    - Simplifies netdev_intersect_features

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert
2015-12-14 11:19:44 -08:00
committed by David S. Miller
parent a188222b6e
commit c8cd0989bd
13 changed files with 50 additions and 39 deletions
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12
net/core/dev.c
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@@ -6467,9 +6467,9 @@ static netdev_features_t netdev_fix_features(struct net_device *dev,
/* UFO needs SG and checksumming */
if (features & NETIF_F_UFO) {
/* maybe split UFO into V4 and V6? */
if (!((features & NETIF_F_GEN_CSUM) ||
(features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
== (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) {
if (!(features & NETIF_F_HW_CSUM) &&
((features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) !=
(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) {
netdev_dbg(dev,
"Dropping NETIF_F_UFO since no checksum offload features.\n");
features &= ~NETIF_F_UFO;
@@ -7571,7 +7571,7 @@ static int dev_cpu_callback(struct notifier_block *nfb,
netdev_features_t netdev_increment_features(netdev_features_t all,
netdev_features_t one, netdev_features_t mask)
{
if (mask & NETIF_F_GEN_CSUM)
if (mask & NETIF_F_HW_CSUM)
mask |= NETIF_F_CSUM_MASK;
mask |= NETIF_F_VLAN_CHALLENGED;
@@ -7579,8 +7579,8 @@ netdev_features_t netdev_increment_features(netdev_features_t all,
all &= one | ~NETIF_F_ALL_FOR_ALL;
/* If one device supports hw checksumming, set for all. */
if (all & NETIF_F_GEN_CSUM)
all &= ~(NETIF_F_CSUM_MASK & ~NETIF_F_GEN_CSUM);
if (all & NETIF_F_HW_CSUM)
all &= ~(NETIF_F_CSUM_MASK & ~NETIF_F_HW_CSUM);
return all;
}