From: Yonghong Song <yhs@fb.com>
To: <bpf@vger.kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>, <kernel-team@fb.com>
Subject: [PATCH bpf-next 1/5] bpf: add BTF_KIND_DECL_TAG typedef support
Date: Thu, 21 Oct 2021 12:56:28 -0700 [thread overview]
Message-ID: <20211021195628.4018847-1-yhs@fb.com> (raw)
In-Reply-To: <20211021195622.4018339-1-yhs@fb.com>
The llvm patches ([1], [2]) added support to attach btf_decl_tag
attributes to typedef declarations. This patch added
support in kernel.
[1] https://reviews.llvm.org/D110127
[2] https://reviews.llvm.org/D112259
Signed-off-by: Yonghong Song <yhs@fb.com>
---
kernel/bpf/btf.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index 9059053088b9..dbc3ad07e21b 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -468,7 +468,7 @@ static bool btf_type_is_decl_tag(const struct btf_type *t)
static bool btf_type_is_decl_tag_target(const struct btf_type *t)
{
return btf_type_is_func(t) || btf_type_is_struct(t) ||
- btf_type_is_var(t);
+ btf_type_is_var(t) || btf_type_is_typedef(t);
}
u32 btf_nr_types(const struct btf *btf)
@@ -3885,7 +3885,7 @@ static int btf_decl_tag_resolve(struct btf_verifier_env *env,
component_idx = btf_type_decl_tag(t)->component_idx;
if (component_idx != -1) {
- if (btf_type_is_var(next_type)) {
+ if (btf_type_is_var(next_type) || btf_type_is_typedef(next_type)) {
btf_verifier_log_type(env, v->t, "Invalid component_idx");
return -EINVAL;
}
--
2.30.2
next prev parent reply other threads:[~2021-10-21 19:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-21 19:56 [PATCH bpf-next 0/5] bpf: add support for BTF_KIND_DECL_TAG typedef Yonghong Song
2021-10-21 19:56 ` Yonghong Song [this message]
2021-10-21 19:56 ` [PATCH bpf-next 2/5] selftests/bpf: add BTF_KIND_DECL_TAG typedef unit tests Yonghong Song
2021-10-21 19:56 ` [PATCH bpf-next 3/5] selftests/bpf: test deduplication for BTF_KIND_DECL_TAG typedef Yonghong Song
2021-10-21 19:56 ` [PATCH bpf-next 4/5] selftests/bpf: add BTF_KIND_DECL_TAG typedef example in tag.c Yonghong Song
2021-10-21 19:56 ` [PATCH bpf-next 5/5] docs/bpf: update documentation for BTF_KIND_DECL_TAG typedef support Yonghong Song
2021-10-23 0:05 ` [PATCH bpf-next 0/5] bpf: add support for BTF_KIND_DECL_TAG typedef Alexei Starovoitov
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