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i40e, xsk: Diversify return values from xsk_wakeup call paths

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Currently, when debugging AF_XDP workloads, one can correlate the -ENXIO
return code as the case that XSK is not in the bound state. Returning
same code from ndo_xsk_wakeup can be misleading and simply makes it
harder to follow what is going on.

Change ENXIOs in i40e's ndo_xsk_wakeup() implementation to EINVALs, so
that when probing it is clear that something is wrong on the driver
side, not the xsk_{recv,send}msg.

There is a -ENETDOWN that can happen from both kernel/driver sides
though, but I don't have a correct replacement for this on one of the
sides, so let's keep it that way.

Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220413153015.453864-10-maciej.fijalkowski@intel.com
This commit is contained in:
Maciej Fijalkowski 2022-04-13 17:30:10 +02:00 committed by Daniel Borkmann
parent ed8a6bc60f
commit ed7ae2d622
1 changed files with 3 additions and 3 deletions
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6
drivers/net/ethernet/intel/i40e/i40e_xsk.c
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@ -606,13 +606,13 @@ int i40e_xsk_wakeup(struct net_device *dev, u32 queue_id, u32 flags)
return -ENETDOWN;
if (!i40e_enabled_xdp_vsi(vsi))
return -ENXIO;
return -EINVAL;
if (queue_id >= vsi->num_queue_pairs)
return -ENXIO;
return -EINVAL;
if (!vsi->xdp_rings[queue_id]->xsk_pool)
return -ENXIO;
return -EINVAL;
ring = vsi->xdp_rings[queue_id];