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 4/9] bpftool: add support for BTF_KIND_TAG
Date: Tue, 7 Sep 2021 16:01:11 -0700 [thread overview]
Message-ID: <20210907230111.1959279-1-yhs@fb.com> (raw)
In-Reply-To: <20210907230050.1957493-1-yhs@fb.com>
added bpftool support to dump BTF_KIND_TAG information.
The new bpftool will be used in later patches to dump
btf in the test bpf program object file.
Signed-off-by: Yonghong Song <yhs@fb.com>
---
tools/bpf/bpftool/btf.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/tools/bpf/bpftool/btf.c b/tools/bpf/bpftool/btf.c
index f7e5ff3586c9..89c17ea62d8e 100644
--- a/tools/bpf/bpftool/btf.c
+++ b/tools/bpf/bpftool/btf.c
@@ -37,6 +37,7 @@ static const char * const btf_kind_str[NR_BTF_KINDS] = {
[BTF_KIND_VAR] = "VAR",
[BTF_KIND_DATASEC] = "DATASEC",
[BTF_KIND_FLOAT] = "FLOAT",
+ [BTF_KIND_TAG] = "TAG",
};
struct btf_attach_table {
@@ -347,6 +348,23 @@ static int dump_btf_type(const struct btf *btf, __u32 id,
printf(" size=%u", t->size);
break;
}
+ case BTF_KIND_TAG: {
+ const struct btf_tag *tag = (const void *)(t + 1);
+
+
+ if (json_output) {
+ jsonw_uint_field(w, "type_id", t->type);
+ if (btf_kflag(t))
+ jsonw_int_field(w, "comp_id", -1);
+ else
+ jsonw_uint_field(w, "comp_id", tag->comp_id);
+ } else if (btf_kflag(t)) {
+ printf(" type_id=%u, comp_id=-1", t->type);
+ } else {
+ printf(" type_id=%u, comp_id=%u", t->type, tag->comp_id);
+ }
+ break;
+ }
default:
break;
}
--
2.30.2
next prev parent reply other threads:[~2021-09-07 23:01 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-07 23:00 [PATCH bpf-next 0/9] bpf: add support for new btf kind BTF_KIND_TAG Yonghong Song
2021-09-07 23:00 ` [PATCH bpf-next 1/9] bpf: " Yonghong Song
2021-09-09 5:09 ` Andrii Nakryiko
2021-09-10 15:55 ` Yonghong Song
2021-09-07 23:01 ` [PATCH bpf-next 2/9] libbpf: rename btf_{hash,equal}_int to btf_{hash,equal}_int_tag Yonghong Song
2021-09-09 5:10 ` Andrii Nakryiko
2021-09-07 23:01 ` [PATCH bpf-next 3/9] libbpf: add support for BTF_KIND_TAG Yonghong Song
2021-09-09 5:26 ` Andrii Nakryiko
2021-09-10 16:04 ` Yonghong Song
2021-09-07 23:01 ` Yonghong Song [this message]
2021-09-09 5:28 ` [PATCH bpf-next 4/9] bpftool: " Andrii Nakryiko
2021-09-09 5:33 ` Andrii Nakryiko
2021-09-10 16:38 ` Yonghong Song
2021-09-10 18:05 ` Andrii Nakryiko
2021-09-10 16:04 ` Yonghong Song
2021-09-07 23:01 ` [PATCH bpf-next 5/9] selftests/bpf: test libbpf API function btf__add_tag() Yonghong Song
2021-09-09 5:35 ` Andrii Nakryiko
2021-09-10 16:39 ` Yonghong Song
2021-09-07 23:01 ` [PATCH bpf-next 6/9] selftests/bpf: add BTF_KIND_TAG unit tests Yonghong Song
2021-09-07 23:01 ` [PATCH bpf-next 7/9] selftests/bpf: test BTF_KIND_TAG for deduplication Yonghong Song
2021-09-07 23:01 ` [PATCH bpf-next 8/9] selftests/bpf: add a test with a bpf program with btf_tag attributes Yonghong Song
2021-09-09 5:39 ` Andrii Nakryiko
2021-09-07 23:01 ` [PATCH bpf-next 9/9] docs/bpf: add documentation for BTF_KIND_TAG Yonghong Song
2021-09-09 5:42 ` Andrii Nakryiko
2021-09-10 16:40 ` Yonghong Song
2021-09-10 18:05 ` Andrii Nakryiko
2021-09-09 22:45 ` [PATCH bpf-next 0/9] bpf: add support for new btf kind BTF_KIND_TAG Jose E. Marchesi
2021-09-09 23:30 ` Yonghong Song
2021-09-10 2:19 ` Jose E. Marchesi
2021-09-10 7:04 ` Yonghong Song
2021-09-10 8:31 ` Jose E. Marchesi
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