Explicitly check if NETFILTER_BPF_LINK is enabled, else configs
that have NETFILTER=y but CONFIG_INET=n fail to link:
> kernel/bpf/syscall.o: undefined reference to `netfilter_prog_ops'
> kernel/bpf/verifier.o: undefined reference to `netfilter_verifier_ops'
Fixes: fd9c663b9ad6 ("bpf: minimal support for programs hooked into netfilter framework")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Link: https://lore.kernel.org/oe-kbuild-all/202304220903.fRZTJtxe-lkp@xxxxxxxxx/
Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
---
checked that my 'goodconfig' still yields a kernel that accepts bpf-nf progs.
include/linux/bpf_types.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/bpf_types.h b/include/linux/bpf_types.h
index 39a999abb0ce..fc0d6f32c687 100644
--- a/include/linux/bpf_types.h
+++ b/include/linux/bpf_types.h
@@ -79,7 +79,7 @@ BPF_PROG_TYPE(BPF_PROG_TYPE_LSM, lsm,
#endif
BPF_PROG_TYPE(BPF_PROG_TYPE_SYSCALL, bpf_syscall,
void *, void *)
-#ifdef CONFIG_NETFILTER
+#ifdef CONFIG_NETFILTER_BPF_LINK
BPF_PROG_TYPE(BPF_PROG_TYPE_NETFILTER, netfilter,
struct bpf_nf_ctx, struct bpf_nf_ctx)
#endif
--
2.39.2
