diff options
| author | Michal Rostecki <mrostecki@opensuse.org> | 2020-01-08 19:23:53 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-01-08 21:34:45 +0300 |
| commit | 2faef64aa6b3c94c940c3a62ed22f3af4980223a (patch) | |
| tree | 3591ae414b4de4232dcba6941d8a2464e4b6a184 /tools/bpf | |
| parent | 5ff051200308ab6f4c64c0fe52187bf4a1234dac (diff) | |
| download | linux-2faef64aa6b3c94c940c3a62ed22f3af4980223a.tar.xz | |
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 <mrostecki@opensuse.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Link: https://lore.kernel.org/bpf/20200108162428.25014-3-mrostecki@opensuse.org
Diffstat (limited to 'tools/bpf')
| -rw-r--r-- | tools/bpf/bpftool/feature.c | 18 |
1 files changed, 18 insertions, 0 deletions
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 */ |