diff options
| author | Björn Töpel <bjorn@kernel.org> | 2022-04-13 17:30:02 +0200 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2022-04-15 21:09:44 +0200 |
| commit | c6c1f11b691e619802474f886355cb3bc9034021 (patch) | |
| tree | a4dacd18f9c67f58ed9e77e57118cfc13001c1b2 /kernel/cred.c | |
| parent | 241d50ec5d79b94694adf13853c1f55d0f0b85e6 (diff) | |
xsk: Improve xdp_do_redirect() error codes
The error codes returned by xdp_do_redirect() when redirecting a frame
to an AF_XDP socket has not been very useful. A driver could not
distinguish between different errors. Prior this change the following
codes where used:
Socket not bound or incorrect queue/netdev: EINVAL
XDP frame/AF_XDP buffer size mismatch: ENOSPC
Could not allocate buffer (copy mode): ENOSPC
AF_XDP Rx buffer full: ENOSPC
After this change:
Socket not bound or incorrect queue/netdev: EINVAL
XDP frame/AF_XDP buffer size mismatch: ENOSPC
Could not allocate buffer (copy mode): ENOMEM
AF_XDP Rx buffer full: ENOBUFS
An AF_XDP zero-copy driver can now potentially determine if the
failure was due to a full Rx buffer, and if so stop processing more
frames, yielding to the userland AF_XDP application.
Signed-off-by: Björn Töpel <bjorn@kernel.org>
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Link: https://lore.kernel.org/bpf/20220413153015.453864-2-maciej.fijalkowski@intel.com
Diffstat (limited to 'kernel/cred.c')
0 files changed, 0 insertions, 0 deletions