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| author | Yonghong Song <yhs@fb.com> | 2018-12-18 22:43:58 +0100 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-12-19 00:47:56 +0100 |
| commit | 76c43ae84e3f455e0b460ed0c43799e018d09ee9 (patch) | |
| tree | 893d0b9605592704106fbe95e9f5c1688c899efc /kernel/bpf/btf.c | |
| parent | Merge branch 'bpf-sk-msg-size-member' (diff) | |
| download | linux-76c43ae84e3f455e0b460ed0c43799e018d09ee9.tar.xz linux-76c43ae84e3f455e0b460ed0c43799e018d09ee9.zip | |
bpf: log struct/union attribute for forward type
Current btf internal verbose logger logs fwd type as
[2] FWD A type_id=0
where A is the type name.
Commit 9d5f9f701b18 ("bpf: btf: fix struct/union/fwd types
with kind_flag") introduced kind_flag which can be used
to distinguish whether a forward type is a struct or
union.
Also, "type_id=0" does not carry any meaningful
information for fwd type as btf_type.type = 0 is simply
enforced during btf verification and is not used
anywhere else.
This commit changed the log to
[2] FWD A struct
if kind_flag = 0, or
[2] FWD A union
if kind_flag = 1.
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'kernel/bpf/btf.c')
| -rw-r--r-- | kernel/bpf/btf.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c index e804b26a0506..715f9fcf4712 100644 --- a/kernel/bpf/btf.c +++ b/kernel/bpf/btf.c @@ -1595,12 +1595,18 @@ static s32 btf_fwd_check_meta(struct btf_verifier_env *env, return 0; } +static void btf_fwd_type_log(struct btf_verifier_env *env, + const struct btf_type *t) +{ + btf_verifier_log(env, "%s", btf_type_kflag(t) ? "union" : "struct"); +} + static struct btf_kind_operations fwd_ops = { .check_meta = btf_fwd_check_meta, .resolve = btf_df_resolve, .check_member = btf_df_check_member, .check_kflag_member = btf_df_check_kflag_member, - .log_details = btf_ref_type_log, + .log_details = btf_fwd_type_log, .seq_show = btf_df_seq_show, }; |