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From 5c940644dfc632f1270f39ee909e1abb877ff081 Mon Sep 17 00:00:00 2001
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From: Andrea Claudi <aclaudi@redhat.com>
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Date: Thu, 13 Jun 2019 14:37:57 +0200
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Subject: [PATCH] bpf: add btf func and func_proto kind support
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1716361
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Upstream Status: iproute2.git commit 3da6d055d93fe
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commit 3da6d055d93fefe40bf88a9bc37b4ce3433696ee
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Author: Yonghong Song <yhs@fb.com>
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Date: Thu Jan 24 16:41:07 2019 -0800
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bpf: add btf func and func_proto kind support
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The issue is discovered for bpf selftest test_skb_cgroup.sh.
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Currently we have,
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$ ./test_skb_cgroup_id.sh
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Wait for testing link-local IP to become available ... OK
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Object has unknown BTF type: 13!
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[PASS]
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In the above the BTF type 13 refers to BTF kind
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BTF_KIND_FUNC_PROTO.
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This patch added support of BTF_KIND_FUNC_PROTO and
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BTF_KIND_FUNC during type parsing.
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With this patch, I got
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$ ./test_skb_cgroup_id.sh
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Wait for testing link-local IP to become available ... OK
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[PASS]
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Signed-off-by: Yonghong Song <yhs@fb.com>
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Acked-by: Daniel Borkmann <daniel@iogearbox.net>
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Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
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---
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lib/bpf.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/lib/bpf.c b/lib/bpf.c
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index 5e85cfc0bdd5b..762f8857453ff 100644
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--- a/lib/bpf.c
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+++ b/lib/bpf.c
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@@ -2193,12 +2193,16 @@ static int bpf_btf_prep_type_data(struct bpf_elf_ctx *ctx)
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case BTF_KIND_ENUM:
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type_cur += var_len * sizeof(struct btf_enum);
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break;
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+ case BTF_KIND_FUNC_PROTO:
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+ type_cur += var_len * sizeof(struct btf_param);
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+ break;
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case BTF_KIND_TYPEDEF:
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case BTF_KIND_PTR:
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case BTF_KIND_FWD:
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case BTF_KIND_VOLATILE:
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case BTF_KIND_CONST:
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case BTF_KIND_RESTRICT:
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+ case BTF_KIND_FUNC:
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break;
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default:
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fprintf(stderr, "Object has unknown BTF type: %u!\n", kind);
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--
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2.20.1
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