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authorBen Hutchings <bhutchings@solarflare.com>2012-01-03 13:04:51 +0100
committerDavid S. Miller <davem@davemloft.net>2012-01-04 20:09:10 +0100
commit55664f324c2a1a6386dc88492c5c94aa3d336b93 (patch)
treea1859e049a47b3bb207882e4b9db126987f2ead9 /net/core/ethtool.c
parentgianfar: Reject out-of-range RX NFC locations (diff)
downloadlinux-55664f324c2a1a6386dc88492c5c94aa3d336b93.tar.xz
linux-55664f324c2a1a6386dc88492c5c94aa3d336b93.zip
ethtool: Allow drivers to select RX NFC rule locations
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>
Diffstat (limited to 'net/core/ethtool.c')
-rw-r--r--net/core/ethtool.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 597732c989ca..e88b80d41f73 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -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,