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authorBrenden Blanco <bblanco@plumgrid.com>2016-07-19 12:16:50 -0700
committerDavid S. Miller <davem@davemloft.net>2016-07-19 21:46:32 -0700
commit47a38e155037f417c5740e24ccae6482aedf4b68 (patch)
treec615b0df2ff096b528d723dc2aa029172fc31ac3 /samples/bpf/bpf_load.c
parentd1fdd9138682e0f272beee0cb08b6328c5478b26 (diff)
downloadlinux-stericsson-47a38e155037f417c5740e24ccae6482aedf4b68.tar.gz
net/mlx4_en: add support for fast rx drop bpf program
Add support for the BPF_PROG_TYPE_XDP hook in mlx4 driver. In tc/socket bpf programs, helpers linearize skb fragments as needed when the program touches the packet data. However, in the pursuit of speed, XDP programs will not be allowed to use these slower functions, especially if it involves allocating an skb. Therefore, disallow MTU settings that would produce a multi-fragment packet that XDP programs would fail to access. Future enhancements could be done to increase the allowable MTU. The xdp program is present as a per-ring data structure, but as of yet it is not possible to set at that granularity through any ndo. Signed-off-by: Brenden Blanco <bblanco@plumgrid.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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