Commit 310ad797 authored by Andrii Nakryiko's avatar Andrii Nakryiko Committed by Daniel Borkmann
Browse files

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: aa8d3a71 ("bpf, xdp: Add bpf_link-based XDP attachment API")
Reported-by: default avatarRandy Dunlap <rdunlap@infradead.org>
Signed-off-by: default avatarAndrii Nakryiko <andriin@fb.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Acked-by: default avatarSong Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20200728190527.110830-1-andriin@fb.com
parent ca5cd355

kernel/bpf/syscall.c

+2 −0
Original line number Diff line number Diff line
@@ -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;

	}