veristat: add -d debug mode option to see debug libbpf log

Add -d option to allow requesting libbpf debug logs from veristat.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20230327185202.1929145-3-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

diff --git a/tools/testing/selftests/bpf/veristat.c b/tools/testing/selftests/bpf/veristat.c
index 8323145..263df32 100644 (file)
--- a/tools/testing/selftests/bpf/veristat.c
+++ b/tools/testing/selftests/bpf/veristat.c
@@ -135,6 +135,7 @@ static struct env {
        char **filenames;
        int filename_cnt;
        bool verbose;
+       bool debug;
        bool quiet;
        int log_level;
        enum resfmt out_fmt;
@@ -169,7 +170,7 @@ static int libbpf_print_fn(enum libbpf_print_level level, const char *format, va
 {
        if (!env.verbose)
                return 0;
-       if (level == LIBBPF_DEBUG /* && !env.verbose */)
+       if (level == LIBBPF_DEBUG  && !env.debug)
                return 0;
        return vfprintf(stderr, format, args);
 }
@@ -186,6 +187,7 @@ static const struct argp_option opts[] = {
        { NULL, 'h', NULL, OPTION_HIDDEN, "Show the full help" },
        { "verbose", 'v', NULL, 0, "Verbose mode" },
        { "log-level", 'l', "LEVEL", 0, "Verifier log level (default 0 for normal mode, 1 for verbose mode)" },
+       { "debug", 'd', NULL, 0, "Debug mode (turns on libbpf debug logging)" },
        { "quiet", 'q', NULL, 0, "Quiet mode" },
        { "emit", 'e', "SPEC", 0, "Specify stats to be emitted" },
        { "sort", 's', "SPEC", 0, "Specify sort order" },
@@ -212,6 +214,10 @@ static error_t parse_arg(int key, char *arg, struct argp_state *state)
        case 'v':
                env.verbose = true;
                break;
+       case 'd':
+               env.debug = true;
+               env.verbose = true;
+               break;
        case 'q':
                env.quiet = true;
                break;