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ethtool: Allow drivers to select RX NFC rule locations

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Define special location values for RX NFC that request the driver to
select the actual rule location.  This allows for implementation on
devices that use hash-based filter lookup, whereas currently the API is
more suited to devices with TCAM lookup or linear search.

In ethtool_set_rxnfc() and the compat wrapper ethtool_ioctl(), copy
the structure back to user-space after insertion so that the actual
location is returned.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Hutchings 2012-01-03 12:04:51 +00:00 • committed by David S. Miller
parent 3a73e49caa
commit 55664f324c
3 changed files with 35 additions and 4 deletions
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11
net/core/ethtool.c
View file

@ -439,6 +439,7 @@ static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
{
struct ethtool_rxnfc info;
size_t info_size = sizeof(info);
int rc;
if (!dev->ethtool_ops->set_rxnfc)
return -EOPNOTSUPP;
@ -454,7 +455,15 @@ static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
if (copy_from_user(&info, useraddr, info_size))
return -EFAULT;
return dev->ethtool_ops->set_rxnfc(dev, &info);
rc = dev->ethtool_ops->set_rxnfc(dev, &info);
if (rc)
return rc;
if (cmd == ETHTOOL_SRXCLSRLINS &&
copy_to_user(useraddr, &info, info_size))
return -EFAULT;
return 0;
}
static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,