From: Andrii Nakryiko Date: Tue, 10 May 2022 00:16:05 +0000 (-0700) Subject: Merge branch 'bpftool: fix feature output when helper probes fail' X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=bfa92e0bdc8ee5d444086fa25489de861a17b085;p=linux.git Merge branch 'bpftool: fix feature output when helper probes fail' Milan Landaverde says: ==================== Currently in bpftool's feature probe, we incorrectly tell the user that all of the helper functions are supported for program types where helper probing fails or is explicitly unsupported[1]: $ bpftool feature probe ... eBPF helpers supported for program type tracing: - bpf_map_lookup_elem - bpf_map_update_elem - bpf_map_delete_elem ... - bpf_redirect_neigh - bpf_check_mtu - bpf_sys_bpf - bpf_sys_close This patch adjusts bpftool to relay to the user when helper support can't be determined: $ bpftool feature probe ... eBPF helpers supported for program type lirc_mode2: Program type not supported eBPF helpers supported for program type tracing: Could not determine which helpers are available eBPF helpers supported for program type struct_opts: Could not determine which helpers are available eBPF helpers supported for program type ext: Could not determine which helpers are available Rather than imply that no helpers are available for the program type, we let the user know that helper function probing failed entirely. [1] https://lore.kernel.org/bpf/20211217171202.3352835-2-andrii@kernel.org/ ==================== Signed-off-by: Andrii Nakryiko --- bfa92e0bdc8ee5d444086fa25489de861a17b085