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Message-Id: <20190410045642.6584-1-bhole_prashant_q7@lab.ntt.co.jp>
Date: Wed, 10 Apr 2019 13:56:42 +0900
From: Prashant Bhole <bhole_prashant_q7@....ntt.co.jp>
To: Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>
Cc: Prashant Bhole <bhole_prashant_q7@....ntt.co.jp>,
Jakub Kicinski <jakub.kicinski@...ronome.com>,
Quentin Monnet <quentin.monnet@...ronome.com>,
Martin KaFai Lau <kafai@...com>,
Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
netdev@...r.kernel.org
Subject: [PATCH bpf-next] tools/bpftool: show btf id in program information
Let's add a way to know whether a program has btf context.
Patch adds 'btf_id' in the output of program listing.
When btf_id is present, it means program has btf context.
Sample output:
user@...t# bpftool prog list
25: xdp name xdp_prog1 tag 539ec6ce11b52f98 gpl
loaded_at 2019-04-10T11:44:20+0900 uid 0
xlated 488B not jited memlock 4096B map_ids 23
btf_id 1
Signed-off-by: Prashant Bhole <bhole_prashant_q7@....ntt.co.jp>
---
tools/bpf/bpftool/prog.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c
index d2be5a06c339..81067803189e 100644
--- a/tools/bpf/bpftool/prog.c
+++ b/tools/bpf/bpftool/prog.c
@@ -249,6 +249,9 @@ static void print_prog_json(struct bpf_prog_info *info, int fd)
if (info->nr_map_ids)
show_prog_maps(fd, info->nr_map_ids);
+ if (info->btf_id)
+ jsonw_int_field(json_wtr, "btf_id", info->btf_id);
+
if (!hash_empty(prog_table.table)) {
struct pinned_obj *obj;
@@ -319,6 +322,9 @@ static void print_prog_plain(struct bpf_prog_info *info, int fd)
}
}
+ if (info->btf_id)
+ printf("\n\tbtf_id %d\n", info->btf_id);
+
printf("\n");
}
--
2.17.2
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