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net: Implement SFEATURES compatibility for not updated drivers

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Use discrete setting ops for not updated drivers. This will not make
them conform to full G/SFEATURES semantics, though.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michał Mirosław
2011-02-22 16:52:29 +00:00
committed by David S. Miller
parent 4e4db20054
commit 39fc0ce571
2 changed files with 66 additions and 0 deletions
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61
net/core/ethtool.c
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@ -178,6 +178,64 @@ static void ethtool_get_features_compat(struct net_device *dev,
if (dev->ethtool_ops->get_rx_csum)
if (dev->ethtool_ops->get_rx_csum(dev))
features[0].active |= NETIF_F_RXCSUM;
/* mark legacy-changeable features */
if (dev->ethtool_ops->set_sg)
features[0].available |= NETIF_F_SG;
if (dev->ethtool_ops->set_tx_csum)
features[0].available |= NETIF_F_ALL_CSUM;
if (dev->ethtool_ops->set_tso)
features[0].available |= NETIF_F_ALL_TSO;
if (dev->ethtool_ops->set_rx_csum)
features[0].available |= NETIF_F_RXCSUM;
if (dev->ethtool_ops->set_flags)
features[0].available |= flags_dup_features;
}
static int ethtool_set_feature_compat(struct net_device *dev,
int (*legacy_set)(struct net_device *, u32),
struct ethtool_set_features_block *features, u32 mask)
{
u32 do_set;
if (!legacy_set)
return 0;
if (!(features[0].valid & mask))
return 0;
features[0].valid &= ~mask;
do_set = !!(features[0].requested & mask);
if (legacy_set(dev, do_set) < 0)
netdev_info(dev,
"Legacy feature change (%s) failed for 0x%08x\n",
do_set ? "set" : "clear", mask);
return 1;
}
static int ethtool_set_features_compat(struct net_device *dev,
struct ethtool_set_features_block *features)
{
int compat;
if (!dev->ethtool_ops)
return 0;
compat = ethtool_set_feature_compat(dev, dev->ethtool_ops->set_sg,
features, NETIF_F_SG);
compat |= ethtool_set_feature_compat(dev, dev->ethtool_ops->set_tx_csum,
features, NETIF_F_ALL_CSUM);
compat |= ethtool_set_feature_compat(dev, dev->ethtool_ops->set_tso,
features, NETIF_F_ALL_TSO);
compat |= ethtool_set_feature_compat(dev, dev->ethtool_ops->set_rx_csum,
features, NETIF_F_RXCSUM);
compat |= ethtool_set_feature_compat(dev, dev->ethtool_ops->set_flags,
features, flags_dup_features);
return compat;
}
static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
@ -234,6 +292,9 @@ static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
if (features[0].valid & ~NETIF_F_ETHTOOL_BITS)
return -EINVAL;
if (ethtool_set_features_compat(dev, features))
ret |= ETHTOOL_F_COMPAT;
if (features[0].valid & ~dev->hw_features) {
features[0].valid &= dev->hw_features;
ret |= ETHTOOL_F_UNSUPPORTED;