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ixgbe: Do not allow LRO or MTU change with XDP

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XDP does not support jumbo frames or LRO.  These checks are being made
outside the driver when an XDP program is loaded, however, there is
nothing preventing these from changing after an XDP program is loaded.
Add the checks so that while an XDP program is loaded, do not allow MTU
to be changed or LRO to be enabled.

Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Tony Nguyen 2018-05-30 16:14:23 -07:00 committed by Jeff Kirsher
parent dc66fe43b7
commit 38b7e7f8ae
1 changed files with 10 additions and 0 deletions
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10
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
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@ -6469,6 +6469,11 @@ static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
{ {
struct ixgbe_adapter *adapter = netdev_priv(netdev); struct ixgbe_adapter *adapter = netdev_priv(netdev);
if (adapter->xdp_prog) {
e_warn(probe, "MTU cannot be changed while XDP program is loaded\n");
return -EPERM;
}
/* /*
* For 82599EB we cannot allow legacy VFs to enable their receive * For 82599EB we cannot allow legacy VFs to enable their receive
* paths when MTU greater than 1500 is configured. So display a * paths when MTU greater than 1500 is configured. So display a
@ -9407,6 +9412,11 @@ static netdev_features_t ixgbe_fix_features(struct net_device *netdev,
if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)) if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE))
features &= ~NETIF_F_LRO; features &= ~NETIF_F_LRO;
if (adapter->xdp_prog && (features & NETIF_F_LRO)) {
e_dev_err("LRO is not supported with XDP\n");
features &= ~NETIF_F_LRO;
}
return features; return features;
} }