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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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2
net/socket.c
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@@ -2758,10 +2758,10 @@ static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
case ETHTOOL_GRXRINGS:
case ETHTOOL_GRXCLSRLCNT:
case ETHTOOL_GRXCLSRULE:
case ETHTOOL_SRXCLSRLINS:
convert_out = true;
/* fall through */
case ETHTOOL_SRXCLSRLDEL:
case ETHTOOL_SRXCLSRLINS:
buf_size += sizeof(struct ethtool_rxnfc);
convert_in = true;
break;