diff mbox series

[bpf-next,1/5] bpf: add BTF_KIND_DECL_TAG typedef support

Message ID 20211021195628.4018847-1-yhs@fb.com (mailing list archive)
State Accepted
Delegated to: BPF
Headers show
Series bpf: add support for BTF_KIND_DECL_TAG typedef | expand

Checks

Context Check Description
netdev/cover_letter success Series has a cover letter
netdev/fixes_present success Fixes tag not required for -next series
netdev/patch_count success Link
netdev/tree_selection success Clearly marked for bpf-next
netdev/subject_prefix success Link
netdev/cc_maintainers warning 8 maintainers not CCed: john.fastabend@gmail.com netdev@vger.kernel.org songliubraving@fb.com ndesaulniers@google.com nathan@kernel.org llvm@lists.linux.dev kafai@fb.com kpsingh@kernel.org
netdev/source_inline success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 9 this patch: 9
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/verify_fixes success No Fixes tag
netdev/checkpatch warning WARNING: line length of 83 exceeds 80 columns
netdev/build_allmodconfig_warn success Errors and warnings before: 9 this patch: 9
netdev/header_inline success No static functions without inline keyword in header files
bpf/vmtest-bpf-next success VM_Test
bpf/vmtest-bpf-next-PR success PR summary

Commit Message

Yonghong Song Oct. 21, 2021, 7:56 p.m. UTC 
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 mbox series

Patch

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;
 		}