libbpf-tools: update mountsnoop for libbpf 1.0

Switch to libbpf 1.0 mode and adapt libbpf API usage accordingly.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>

diff --git a/libbpf-tools/mountsnoop.c b/libbpf-tools/mountsnoop.c
index 2df9d7dd2517ca72b5af5d9336053b363c3141e5..6bf7ee57422fd7846845d795d75ef05c6f1d41cb 100644 (file)
--- a/libbpf-tools/mountsnoop.c
+++ b/libbpf-tools/mountsnoop.c
@@ -237,7 +237,6 @@ int main(int argc, char **argv)
                .parser = parse_arg,
                .doc = argp_program_doc,
        };
-       struct perf_buffer_opts pb_opts;
        struct perf_buffer *pb = NULL;
        struct mountsnoop_bpf *obj;
        int err;
@@ -246,11 +245,7 @@ int main(int argc, char **argv)
        if (err)
                return err;
 
-       err = bump_memlock_rlimit();
-       if (err) {
-               warn("failed to increase rlimit: %d\n", err);
-               return 1;
-       }
+       libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
 
        obj = mountsnoop_bpf__open();
        if (!obj) {
@@ -272,11 +267,10 @@ int main(int argc, char **argv)
                goto cleanup;
        }
 
-       pb_opts.sample_cb = handle_event;
-       pb_opts.lost_cb = handle_lost_events;
-       pb = perf_buffer__new(bpf_map__fd(obj->maps.events), PERF_BUFFER_PAGES, &pb_opts);
-       err = libbpf_get_error(pb);
-       if (err) {
+       pb = perf_buffer__new(bpf_map__fd(obj->maps.events), PERF_BUFFER_PAGES,
+                             handle_event, handle_lost_events, NULL, NULL);
+       if (!pb) {
+               err = -errno;
                warn("failed to open perf buffer: %d\n", err);
                goto cleanup;
        }
@@ -295,8 +289,8 @@ int main(int argc, char **argv)
 
        while (!exiting) {
                err = perf_buffer__poll(pb, PERF_POLL_TIMEOUT_MS);
-               if (err < 0 && errno != EINTR) {
-                       fprintf(stderr, "error polling perf buffer: %s\n", strerror(errno));
+               if (err < 0 && err != -EINTR) {
+                       fprintf(stderr, "error polling perf buffer: %s\n", strerror(-err));
                        goto cleanup;
                }
                /* reset err to return 0 if exiting */