From c76e4c228b053eb108e6c3221bef338aa2c98fac Mon Sep 17 00:00:00 2001 From: Taeung Song Date: Mon, 21 Jan 2019 22:06:38 +0900 Subject: libbpf: Show supported ELF section names when failing to guess prog/attach type We need to let users check their wrong ELF section name with proper ELF section names when they fail to get a prog/attach type from it. Because users can't realize libbpf guess prog/attach types from given ELF section names. For example, when a 'cgroup' section name of a BPF program is used, show available ELF section names(types). Before: $ bpftool prog load bpf-prog.o /sys/fs/bpf/prog1 Error: failed to guess program type based on ELF section name cgroup After: libbpf: failed to guess program type based on ELF section name 'cgroup' libbpf: supported section(type) names are: socket kprobe/ kretprobe/ classifier action tracepoint/ raw_tracepoint/ xdp perf_event lwt_in lwt_out lwt_xmit lwt_seg6local cgroup_skb/ingress cgroup_skb/egress cgroup/skb cgroup/sock cgroup/post_bind4 cgroup/post_bind6 cgroup/dev sockops sk_skb/stream_parser sk_skb/stream_verdict sk_skb sk_msg lirc_mode2 flow_dissector cgroup/bind4 cgroup/bind6 cgroup/connect4 cgroup/connect6 cgroup/sendmsg4 cgroup/sendmsg6 Signed-off-by: Taeung Song Cc: Quentin Monnet Cc: Jakub Kicinski Cc: Andrey Ignatov Reviewed-by: Quentin Monnet Acked-by: Jakub Kicinski Signed-off-by: Daniel Borkmann --- tools/bpf/bpftool/prog.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) (limited to 'tools/bpf') diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c index 2d1bb7d6ff51..0640e9bc0ada 100644 --- a/tools/bpf/bpftool/prog.c +++ b/tools/bpf/bpftool/prog.c @@ -930,10 +930,9 @@ static int load_with_options(int argc, char **argv, bool first_prog_only) err = libbpf_prog_type_by_name(type, &attr.prog_type, &expected_attach_type); free(type); - if (err < 0) { - p_err("unknown program type '%s'", *argv); + if (err < 0) goto err_free_reuse_maps; - } + NEXT_ARG(); } else if (is_prefix(*argv, "map")) { void *new_map_replace; @@ -1028,11 +1027,8 @@ static int load_with_options(int argc, char **argv, bool first_prog_only) err = libbpf_prog_type_by_name(sec_name, &prog_type, &expected_attach_type); - if (err < 0) { - p_err("failed to guess program type based on section name %s\n", - sec_name); + if (err < 0) goto err_close_obj; - } } bpf_program__set_ifindex(pos, ifindex); -- cgit v1.2.3-59-g8ed1b