From: Tao Chen <chen.dylane@linux.dev>
To: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org,
yonghong.song@linux.dev, john.fastabend@gmail.com,
kpsingh@kernel.org, sdf@fomichev.me, qmo@kernel.org,
jolsa@kernel.org
Cc: bpf@vger.kernel.org, linux-kernel@vger.kernel.org,
Tao Chen <chen.dylane@linux.dev>
Subject: [PATCH bpf-next 3/5] bpftool: Display cookie for tracing link probe
Date: Sat, 7 Jun 2025 00:58:16 +0800 [thread overview]
Message-ID: <20250606165818.3394397-3-chen.dylane@linux.dev> (raw)
In-Reply-To: <20250606165818.3394397-1-chen.dylane@linux.dev>
Display cookie for tracing link probe, in plain mode:
#bpftool link
5: tracing prog 34
prog_type tracing attach_type trace_fentry
target_obj_id 1 target_btf_id 60355
cookie 4503599627370496
pids test_progs(176)
And in json mode:
#bpftool link -j | jq
{
"id": 5,
"type": "tracing",
"prog_id": 34,
"prog_type": "tracing",
"attach_type": "trace_fentry",
"target_obj_id": 1,
"target_btf_id": 60355,
"cookie": 4503599627370496,
"pids": [
{
"pid": 176,
"comm": "test_progs"
}
]
}
Signed-off-by: Tao Chen <chen.dylane@linux.dev>
---
tools/bpf/bpftool/link.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/bpf/bpftool/link.c b/tools/bpf/bpftool/link.c
index cb67ce4eba2..03513ffffb7 100644
--- a/tools/bpf/bpftool/link.c
+++ b/tools/bpf/bpftool/link.c
@@ -503,6 +503,7 @@ static int show_link_close_json(int fd, struct bpf_link_info *info)
json_wtr);
jsonw_uint_field(json_wtr, "target_obj_id", info->tracing.target_obj_id);
jsonw_uint_field(json_wtr, "target_btf_id", info->tracing.target_btf_id);
+ jsonw_uint_field(json_wtr, "cookie", info->tracing.cookie);
break;
case BPF_LINK_TYPE_CGROUP:
jsonw_lluint_field(json_wtr, "cgroup_id",
@@ -900,6 +901,8 @@ static int show_link_close_plain(int fd, struct bpf_link_info *info)
printf("\n\ttarget_obj_id %u target_btf_id %u ",
info->tracing.target_obj_id,
info->tracing.target_btf_id);
+ if (info->tracing.cookie)
+ printf("\n\tcookie %llu ", info->tracing.cookie);
break;
case BPF_LINK_TYPE_CGROUP:
printf("\n\tcgroup_id %zu ", (size_t)info->cgroup.cgroup_id);
--
2.43.0
next prev parent reply other threads:[~2025-06-06 16:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-06 16:58 [PATCH bpf-next 1/5] bpf: Add cookie to tracing bpf_link_info Tao Chen
2025-06-06 16:58 ` [PATCH bpf-next 2/5] selftests/bpf: Add cookies check for tracing fill_link_info test Tao Chen
2025-06-06 16:58 ` Tao Chen [this message]
2025-06-06 16:58 ` [PATCH bpf-next 4/5] bpf: Add cookie in fdinfo for tracing Tao Chen
2025-06-06 16:58 ` [PATCH bpf-next 5/5] bpf: Add cookie in fdinfo for raw_tp Tao Chen
2025-06-09 23:50 ` [PATCH bpf-next 1/5] bpf: Add cookie to tracing bpf_link_info patchwork-bot+netdevbpf
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