* [PATCH bpf-next] bpftool: print function linkage in BTF dump
@ 2020-01-24 5:43 Andrii Nakryiko
2020-01-24 7:01 ` Martin Lau
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Andrii Nakryiko @ 2020-01-24 5:43 UTC (permalink / raw)
To: bpf, netdev, ast, daniel; +Cc: andrii.nakryiko, kernel-team, Andrii Nakryiko
Add printing out BTF_KIND_FUNC's linkage.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
---
tools/bpf/bpftool/btf.c | 27 +++++++++++++++++++++++----
1 file changed, 23 insertions(+), 4 deletions(-)
diff --git a/tools/bpf/bpftool/btf.c b/tools/bpf/bpftool/btf.c
index 4ba90d81b6a1..b3745ed711ba 100644
--- a/tools/bpf/bpftool/btf.c
+++ b/tools/bpf/bpftool/btf.c
@@ -77,6 +77,20 @@ static const char *btf_var_linkage_str(__u32 linkage)
}
}
+static const char *btf_func_linkage_str(const struct btf_type *t)
+{
+ switch (btf_vlen(t)) {
+ case BTF_FUNC_STATIC:
+ return "static";
+ case BTF_FUNC_GLOBAL:
+ return "global";
+ case BTF_FUNC_EXTERN:
+ return "extern";
+ default:
+ return "(unknown)";
+ }
+}
+
static const char *btf_str(const struct btf *btf, __u32 off)
{
if (!off)
@@ -231,12 +245,17 @@ static int dump_btf_type(const struct btf *btf, __u32 id,
printf(" fwd_kind=%s", fwd_kind);
break;
}
- case BTF_KIND_FUNC:
- if (json_output)
+ case BTF_KIND_FUNC: {
+ const char *linkage = btf_func_linkage_str(t);
+
+ if (json_output) {
jsonw_uint_field(w, "type_id", t->type);
- else
- printf(" type_id=%u", t->type);
+ jsonw_string_field(w, "linkage", linkage);
+ } else {
+ printf(" type_id=%u linkage=%s", t->type, linkage);
+ }
break;
+ }
case BTF_KIND_FUNC_PROTO: {
const struct btf_param *p = (const void *)(t + 1);
__u16 vlen = BTF_INFO_VLEN(t->info);
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH bpf-next] bpftool: print function linkage in BTF dump
2020-01-24 5:43 [PATCH bpf-next] bpftool: print function linkage in BTF dump Andrii Nakryiko
@ 2020-01-24 7:01 ` Martin Lau
2020-01-24 9:53 ` Toke Høiland-Jørgensen
2020-01-24 10:12 ` Daniel Borkmann
2 siblings, 0 replies; 4+ messages in thread
From: Martin Lau @ 2020-01-24 7:01 UTC (permalink / raw)
To: Andrii Nakryiko
Cc: bpf, netdev, Alexei Starovoitov, daniel, andrii.nakryiko, Kernel Team
On Thu, Jan 23, 2020 at 09:43:17PM -0800, Andrii Nakryiko wrote:
> Add printing out BTF_KIND_FUNC's linkage.
Acked-by: Martin KaFai Lau <kafai@fb.com>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH bpf-next] bpftool: print function linkage in BTF dump
2020-01-24 5:43 [PATCH bpf-next] bpftool: print function linkage in BTF dump Andrii Nakryiko
2020-01-24 7:01 ` Martin Lau
@ 2020-01-24 9:53 ` Toke Høiland-Jørgensen
2020-01-24 10:12 ` Daniel Borkmann
2 siblings, 0 replies; 4+ messages in thread
From: Toke Høiland-Jørgensen @ 2020-01-24 9:53 UTC (permalink / raw)
To: Andrii Nakryiko, bpf, netdev, ast, daniel
Cc: andrii.nakryiko, kernel-team, Andrii Nakryiko
Andrii Nakryiko <andriin@fb.com> writes:
> Add printing out BTF_KIND_FUNC's linkage.
>
> Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH bpf-next] bpftool: print function linkage in BTF dump
2020-01-24 5:43 [PATCH bpf-next] bpftool: print function linkage in BTF dump Andrii Nakryiko
2020-01-24 7:01 ` Martin Lau
2020-01-24 9:53 ` Toke Høiland-Jørgensen
@ 2020-01-24 10:12 ` Daniel Borkmann
2 siblings, 0 replies; 4+ messages in thread
From: Daniel Borkmann @ 2020-01-24 10:12 UTC (permalink / raw)
To: Andrii Nakryiko, bpf, netdev, ast; +Cc: andrii.nakryiko, kernel-team
On 1/24/20 6:43 AM, Andrii Nakryiko wrote:
> Add printing out BTF_KIND_FUNC's linkage.
>
> Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Applied, thanks!
^ permalink raw reply [flat|nested] 4+ messages in thread
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2020-01-24 5:43 [PATCH bpf-next] bpftool: print function linkage in BTF dump Andrii Nakryiko
2020-01-24 7:01 ` Martin Lau
2020-01-24 9:53 ` Toke Høiland-Jørgensen
2020-01-24 10:12 ` Daniel Borkmann
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