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igb: XDP extack message on error

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Add an extack error message when the RX buffer size is too small
for the frame size.

Fixes: 9cbc948b5a ("igb: add XDP support")
Suggested-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Sven Auhagen <sven.auhagen@voleatech.de>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Sven Auhagen 2020-11-11 18:04:50 +01:00 committed by Tony Nguyen
parent b829ec1a66
commit 2e2bb5594c
1 changed files with 12 additions and 5 deletions
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17
drivers/net/ethernet/intel/igb/igb_main.c
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@ -2824,21 +2824,26 @@ static int igb_setup_tc(struct net_device *dev, enum tc_setup_type type,
}
}
static int igb_xdp_setup(struct net_device *dev, struct bpf_prog *prog)
static int igb_xdp_setup(struct net_device *dev, struct netdev_bpf *bpf)
{
int i, frame_size = dev->mtu + IGB_ETH_PKT_HDR_PAD;
struct igb_adapter *adapter = netdev_priv(dev);
struct bpf_prog *prog = bpf->prog, *old_prog;
bool running = netif_running(dev);
struct bpf_prog *old_prog;
bool need_reset;
/* verify igb ring attributes are sufficient for XDP */
for (i = 0; i < adapter->num_rx_queues; i++) {
struct igb_ring *ring = adapter->rx_ring[i];
if (frame_size > igb_rx_bufsz(ring))
if (frame_size > igb_rx_bufsz(ring)) {
NL_SET_ERR_MSG_MOD(bpf->extack,
"The RX buffer size is too small for the frame size");
netdev_warn(dev, "XDP RX buffer size %d is too small for the frame size %d\n",
igb_rx_bufsz(ring), frame_size);
return -EINVAL;
}
}
old_prog = xchg(&adapter->xdp_prog, prog);
need_reset = (!!prog != !!old_prog);
@ -2869,7 +2874,7 @@ static int igb_xdp(struct net_device *dev, struct netdev_bpf *xdp)
{
switch (xdp->command) {
case XDP_SETUP_PROG:
return igb_xdp_setup(dev, xdp->prog);
return igb_xdp_setup(dev, xdp);
default:
return -EINVAL;
}
@ -6499,7 +6504,9 @@ static int igb_change_mtu(struct net_device *netdev, int new_mtu)
struct igb_ring *ring = adapter->rx_ring[i];
if (max_frame > igb_rx_bufsz(ring)) {
netdev_warn(adapter->netdev, "Requested MTU size is not supported with XDP\n");
netdev_warn(adapter->netdev,
"Requested MTU size is not supported with XDP. Max frame size is %d\n",
max_frame);
return -EINVAL;
}
}