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| author | Michał Mirosław <mirq-linux@rere.qmqm.pl> | 2011-02-22 16:52:29 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-02-23 14:23:32 -0800 |
| commit | 39fc0ce5710c53bad14aaba1a789eec810c556f9 (patch) | |
| tree | dc5ee565d2fe030dab7cdc1757c822ecc793cc4f /net | |
| parent | 4e4db200541d49404ff39ac482efee072dd72144 (diff) | |
| download | linux-39fc0ce5710c53bad14aaba1a789eec810c556f9.tar.gz | |
net: Implement SFEATURES compatibility for not updated drivers
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>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/ethtool.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/net/core/ethtool.c b/net/core/ethtool.c index 69a3edc182f9..c1a71bb738da 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -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; |