From: Milan Landaverde <milan@mdaverde.com>
To: bpf@vger.kernel.org
Cc: milan@mdaverde.com, ast@kernel.org, daniel@iogearbox.net,
andrii@kernel.org, kafai@fb.com, songliubraving@fb.com,
yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org,
quentin@isovalent.com, davemarchevsky@fb.com, sdf@google.com,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH bpf-next 3/3] bpf/bpftool: handle libbpf_probe_prog_type errors
Date: Thu, 31 Mar 2022 11:45:55 -0400 [thread overview]
Message-ID: <20220331154555.422506-4-milan@mdaverde.com> (raw)
In-Reply-To: <20220331154555.422506-1-milan@mdaverde.com>
Previously [1], we were using bpf_probe_prog_type which returned a
bool, but the new libbpf_probe_bpf_prog_type can return a negative
error code on failure. This change decides for bpftool to declare
a program type is not available on probe failure.
[1] https://lore.kernel.org/bpf/20220202225916.3313522-3-andrii@kernel.org/
Signed-off-by: Milan Landaverde <milan@mdaverde.com>
---
tools/bpf/bpftool/feature.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/bpf/bpftool/feature.c b/tools/bpf/bpftool/feature.c
index c2f43a5d38e0..b2fbaa7a6b15 100644
--- a/tools/bpf/bpftool/feature.c
+++ b/tools/bpf/bpftool/feature.c
@@ -564,7 +564,7 @@ probe_prog_type(enum bpf_prog_type prog_type, bool *supported_types,
res = probe_prog_type_ifindex(prog_type, ifindex);
} else {
- res = libbpf_probe_bpf_prog_type(prog_type, NULL);
+ res = libbpf_probe_bpf_prog_type(prog_type, NULL) > 0;
}
#ifdef USE_LIBCAP
--
2.32.0
next prev parent reply other threads:[~2022-03-31 15:47 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-31 15:45 [PATCH bpf-next 0/3] bpf/bpftool: add program & link type names Milan Landaverde
2022-03-31 15:45 ` [PATCH bpf-next 1/3] bpf/bpftool: add syscall prog type Milan Landaverde
2022-04-01 16:04 ` Quentin Monnet
2022-04-01 18:40 ` Andrii Nakryiko
2022-04-01 21:20 ` Quentin Monnet
2022-03-31 15:45 ` [PATCH bpf-next 2/3] bpf/bpftool: add missing link types Milan Landaverde
2022-04-01 16:05 ` Quentin Monnet
2022-04-04 21:55 ` Andrii Nakryiko
2022-03-31 15:45 ` Milan Landaverde [this message]
2022-04-01 16:05 ` [PATCH bpf-next 3/3] bpf/bpftool: handle libbpf_probe_prog_type errors Quentin Monnet
2022-04-01 18:42 ` Andrii Nakryiko
2022-04-01 21:33 ` Quentin Monnet
2022-04-03 23:51 ` Andrii Nakryiko
2022-04-04 22:00 ` [PATCH bpf-next 0/3] bpf/bpftool: add program & link type names patchwork-bot+netdevbpf
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