tjh.dev / kernel
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bpf: xdp: Register generic_kfunc_set with XDP programs

Registering generic_kfunc_set with XDP programs enables some of the
newer BPF features inside XDP -- namely tree based data structures and
BPF exceptions.

The current motivation for this commit is to enable assertions inside
XDP bpf progs. Assertions are a standard and useful tool to encode
intent.

Signed-off-by: Daniel Xu <dxu@dxuuu.xyz>
Link: https://lore.kernel.org/r/d07d4614b81ca6aada44fcb89bb6b618fb66e4ca.1702594357.git.dxu@dxuuu.xyz
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

authored by

Daniel Xu and committed by
Alexei Starovoitov 7489723c 0f5d5454

+1
+1
kernel/bpf/helpers.c
··· 2630 2630 2631 2631 ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &generic_kfunc_set); 2632 2632 ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_CLS, &generic_kfunc_set); 2633 + ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_XDP, &generic_kfunc_set); 2633 2634 ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS, &generic_kfunc_set); 2634 2635 ret = ret ?: register_btf_id_dtor_kfuncs(generic_dtors, 2635 2636 ARRAY_SIZE(generic_dtors),