From 2faef64aa6b3c94c940c3a62ed22f3af4980223a Mon Sep 17 00:00:00 2001 From: Michal Rostecki Date: Wed, 8 Jan 2020 17:23:53 +0100 Subject: bpftool: Add misc section and probe for large INSN limit Introduce a new probe section (misc) for probes not related to concrete map types, program types, functions or kernel configuration. Introduce a probe for large INSN limit as the first one in that section. Example outputs: # bpftool feature probe [...] Scanning miscellaneous eBPF features... Large program size limit is available # bpftool feature probe macros [...] /*** eBPF misc features ***/ #define HAVE_HAVE_LARGE_INSN_LIMIT # bpftool feature probe -j | jq '.["misc"]' { "have_large_insn_limit": true } Signed-off-by: Michal Rostecki Signed-off-by: Daniel Borkmann Reviewed-by: Quentin Monnet Link: https://lore.kernel.org/bpf/20200108162428.25014-3-mrostecki@opensuse.org --- tools/bpf/bpftool/feature.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/tools/bpf/bpftool/feature.c b/tools/bpf/bpftool/feature.c index 03bdc5b3ac49..94735d968c34 100644 --- a/tools/bpf/bpftool/feature.c +++ b/tools/bpf/bpftool/feature.c @@ -572,6 +572,18 @@ probe_helpers_for_progtype(enum bpf_prog_type prog_type, bool supported_type, printf("\n"); } +static void +probe_large_insn_limit(const char *define_prefix, __u32 ifindex) +{ + bool res; + + res = bpf_probe_large_insn_limit(ifindex); + print_bool_feature("have_large_insn_limit", + "Large program size limit", + "HAVE_LARGE_INSN_LIMIT", + res, define_prefix); +} + static int do_probe(int argc, char **argv) { enum probe_component target = COMPONENT_UNSPEC; @@ -724,6 +736,12 @@ static int do_probe(int argc, char **argv) probe_helpers_for_progtype(i, supported_types[i], define_prefix, ifindex); + print_end_then_start_section("misc", + "Scanning miscellaneous eBPF features...", + "/*** eBPF misc features ***/", + define_prefix); + probe_large_insn_limit(define_prefix, ifindex); + exit_close_json: if (json_output) { /* End current "section" of probes */ -- cgit v1.2.3-59-g8ed1b