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net: ethtool: break association of ETH_FLAG_* with NETIF_F_* 

This is the only place left where dev->features are directly
exposed to userspace.

I know checkpatch.pl complains about __ethtool_{get,set}_flags(), but
the code is easier to read this way.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Acked-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michał Mirosław 2011-11-15 15:29:55 +00:00 committed by David S. Miller
parent bc5787c612
commit 02b3a5524f
1 changed files with 23 additions and 10 deletions
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33
net/core/ethtool.c
View File

@ -240,32 +240,45 @@ static int ethtool_set_one_feature(struct net_device *dev,
return 0;
}
/* the following list of flags are the same as their associated
* NETIF_F_xxx values in include/linux/netdevice.h
*/
static const u32 flags_dup_features =
(ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | ETH_FLAG_NTUPLE |
ETH_FLAG_RXHASH);
#define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_RX | \
NETIF_F_HW_VLAN_TX | NETIF_F_NTUPLE | NETIF_F_RXHASH)
static u32 __ethtool_get_flags(struct net_device *dev)
{
return dev->features & flags_dup_features;
u32 flags = 0;
if (dev->features & NETIF_F_LRO) flags |= ETH_FLAG_LRO;
if (dev->features & NETIF_F_HW_VLAN_RX) flags |= ETH_FLAG_RXVLAN;
if (dev->features & NETIF_F_HW_VLAN_TX) flags |= ETH_FLAG_TXVLAN;
if (dev->features & NETIF_F_NTUPLE) flags |= ETH_FLAG_NTUPLE;
if (dev->features & NETIF_F_RXHASH) flags |= ETH_FLAG_RXHASH;
return flags;
}
static int __ethtool_set_flags(struct net_device *dev, u32 data)
{
u32 features = 0;
u32 changed;
if (data & ~flags_dup_features)
if (data & ~ETH_ALL_FLAGS)
return -EINVAL;
if (data & ETH_FLAG_LRO) features |= NETIF_F_LRO;
if (data & ETH_FLAG_RXVLAN) features |= NETIF_F_HW_VLAN_RX;
if (data & ETH_FLAG_TXVLAN) features |= NETIF_F_HW_VLAN_TX;
if (data & ETH_FLAG_NTUPLE) features |= NETIF_F_NTUPLE;
if (data & ETH_FLAG_RXHASH) features |= NETIF_F_RXHASH;
/* allow changing only bits set in hw_features */
changed = (data ^ dev->features) & flags_dup_features;
changed = (features ^ dev->features) & ETH_ALL_FEATURES;
if (changed & ~dev->hw_features)
return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
dev->wanted_features =
(dev->wanted_features & ~changed) | (data & dev->hw_features);
(dev->wanted_features & ~changed) | (features & changed);
__netdev_update_features(dev);