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Lorenzo Bianconi fdc13979f9 bpf, devmap: Move drop error path to devmap for XDP_REDIRECT
We want to change the current ndo_xdp_xmit drop semantics because it will
allow us to implement better queue overflow handling. This is working
towards the larger goal of a XDP TX queue-hook. Move XDP_REDIRECT error
path handling from each XDP ethernet driver to devmap code. According to
the new APIs, the driver running the ndo_xdp_xmit pointer, will break tx
loop whenever the hw reports a tx error and it will just return to devmap
caller the number of successfully transmitted frames. It will be devmap
responsibility to free dropped frames.

Move each XDP ndo_xdp_xmit capable driver to the new APIs:

- veth
- virtio-net
- mvneta
- mvpp2
- socionext
- amazon ena
- bnxt
- freescale (dpaa2, dpaa)
- xen-frontend
- qede
- ice
- igb
- ixgbe
- i40e
- mlx5
- ti (cpsw, cpsw-new)
- tun
- sfc

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Camelia Groza <camelia.groza@nxp.com>
Acked-by: Edward Cree <ecree.xilinx@gmail.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Shay Agroskin <shayagr@amazon.com>
Link: https://lore.kernel.org/bpf/ed670de24f951cfd77590decf0229a0ad7fd12f6.1615201152.git.lorenzo@kernel.org
2021-03-18 16:38:51 +01:00
arch s390/bpf: Implement new atomic ops 2021-03-16 12:18:49 -07:00
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drivers bpf, devmap: Move drop error path to devmap for XDP_REDIRECT 2021-03-18 16:38:51 +01:00
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include bpf: net: Emit anonymous enum with BPF_TCP_CLOSE value explicitly 2021-03-17 18:45:40 -07:00
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net bpf: net: Emit anonymous enum with BPF_TCP_CLOSE value explicitly 2021-03-17 18:45:40 -07:00
samples samples: bpf: Fix a spelling typo in do_hbm_test.sh 2021-03-15 22:17:35 -07:00
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tools selftests/bpf: drop custom NULL #define in skb_pkt_end selftest 2021-03-17 18:48:05 -07:00
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