From 310ad7970a0dec847563dc6dba9e7e587d545622 Mon Sep 17 00:00:00 2001 From: Andrii Nakryiko Date: Tue, 28 Jul 2020 12:05:27 -0700 Subject: [PATCH] bpf: Fix build without CONFIG_NET when using BPF XDP link Entire net/core subsystem is not built without CONFIG_NET. linux/netdevice.h just assumes that it's always there, so the easiest way to fix this is to conditionally compile out bpf_xdp_link_attach() use in bpf/syscall.c. Fixes: aa8d3a716b59 ("bpf, xdp: Add bpf_link-based XDP attachment API") Reported-by: Randy Dunlap Signed-off-by: Andrii Nakryiko Signed-off-by: Daniel Borkmann Acked-by: Randy Dunlap # build-tested Acked-by: Song Liu Link: https://lore.kernel.org/bpf/20200728190527.110830-1-andriin@fb.com --- kernel/bpf/syscall.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 0e8c88db7e7a..cd3d599e9e90 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -3923,9 +3923,11 @@ static int link_create(union bpf_attr *attr) case BPF_PROG_TYPE_SK_LOOKUP: ret = netns_bpf_link_create(attr, prog); break; +#ifdef CONFIG_NET case BPF_PROG_TYPE_XDP: ret = bpf_xdp_link_attach(attr, prog); break; +#endif default: ret = -EINVAL; }