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bpf: fix link failure with NETFILTER=y INET=n

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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: fd9c663b9a ("bpf: minimal support for programs hooked into netfilter framework")
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/oe-kbuild-all/202304220903.fRZTJtxe-lkp@intel.com/
Signed-off-by: Florian Westphal <fw@strlen.de>
Link: https://lore.kernel.org/r/20230422073544.17634-1-fw@strlen.de
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Florian Westphal
2023-04-22 09:35:44 +02:00
committed by Alexei Starovoitov
parent fbc1449d38
commit 6d26d985ee
1 changed files with 1 additions and 1 deletions
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2
include/linux/bpf_types.h
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@@ -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