diff mbox series

[v2,bpf-next,05/13] bpftool: support displaying raw split BTF using base BTF section as base

Message ID 20240424154806.3417662-6-alan.maguire@oracle.com (mailing list archive)
State Changes Requested
Delegated to: BPF
Headers show
Series bpf: support resilient split BTF | expand

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netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 15 lines checked
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netdev/source_inline success Was 0 now: 0
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Commit Message

Alan Maguire April 24, 2024, 3:47 p.m. UTC 
If no base BTF can be found, fall back to checking for the .BTF.base
section and use it to display split BTF.

Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
---
 tools/bpf/bpftool/btf.c | 9 +++++++++
 1 file changed, 9 insertions(+)

Comments

Andrii Nakryiko April 29, 2024, 11:42 p.m. UTC | #1 
On Wed, Apr 24, 2024 at 8:49 AM Alan Maguire <alan.maguire@oracle.com> wrote:
>
> If no base BTF can be found, fall back to checking for the .BTF.base
> section and use it to display split BTF.
>
> Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
> ---
>  tools/bpf/bpftool/btf.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
> diff --git a/tools/bpf/bpftool/btf.c b/tools/bpf/bpftool/btf.c
> index 91fcb75babe3..2e8bd2c9f0a3 100644
> --- a/tools/bpf/bpftool/btf.c
> +++ b/tools/bpf/bpftool/btf.c
> @@ -631,6 +631,15 @@ static int do_dump(int argc, char **argv)
>                         base = get_vmlinux_btf_from_sysfs();
>
>                 btf = btf__parse_split(*argv, base ?: base_btf);
> +               /* Finally check for presence of base BTF section */
> +               if (!btf && !base && !base_btf) {
> +                       LIBBPF_OPTS(btf_parse_opts, optp);
> +
> +                       optp.btf_sec = BTF_BASE_ELF_SEC;

you can do this declaratively:

LIBBPF_OPTS(btf_parse_opts, optp, .btf_sec = BTF_BASE_ELF_SEC);


> +                       base_btf = btf__parse_opts(*argv, &optp);
> +                       if (base_btf)
> +                               btf = btf__parse_split(*argv, base_btf);
> +               }
>                 if (!btf) {
>                         err = -errno;
>                         p_err("failed to load BTF from %s: %s",
> --
> 2.31.1
>
diff mbox series

Patch

diff --git a/tools/bpf/bpftool/btf.c b/tools/bpf/bpftool/btf.c
index 91fcb75babe3..2e8bd2c9f0a3 100644
--- a/tools/bpf/bpftool/btf.c
+++ b/tools/bpf/bpftool/btf.c
@@ -631,6 +631,15 @@  static int do_dump(int argc, char **argv)
 			base = get_vmlinux_btf_from_sysfs();
 
 		btf = btf__parse_split(*argv, base ?: base_btf);
+		/* Finally check for presence of base BTF section */
+		if (!btf && !base && !base_btf) {
+			LIBBPF_OPTS(btf_parse_opts, optp);
+
+			optp.btf_sec = BTF_BASE_ELF_SEC;
+			base_btf = btf__parse_opts(*argv, &optp);
+			if (base_btf)
+				btf = btf__parse_split(*argv, base_btf);
+		}
 		if (!btf) {
 			err = -errno;
 			p_err("failed to load BTF from %s: %s",