HID: samples: convert the 2 HID-BPF samples into struct_ops

This is mostly mechanical: attach_prog is dropped, and
the SEC are converted into struct_ops.

Link: https://lore.kernel.org/r/20240608-hid_bpf_struct_ops-v3-5-6ac6ade58329@kernel.org
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>

1 files changed, 11 insertions, 28 deletions

diff --git a/samples/hid/hid_mouse.c b/samples/hid/hid_mouse.c
index 018f1185f203..4b80d4e4c154 100644
--- a/samples/hid/hid_mouse.c
+++ b/samples/hid/hid_mouse.c
@@ -29,7 +29,6 @@
 #include <bpf/libbpf.h>
 
 #include "hid_mouse.skel.h"
-#include "hid_bpf_attach.h"
 
 static bool running = true;
 
@@ -76,18 +75,11 @@ static int get_hid_id(const char *path)
 int main(int argc, char **argv)
 {
 	struct hid_mouse *skel;
-	struct bpf_program *prog;
+	struct bpf_link *link;
 	int err;
 	const char *optstr = "";
 	const char *sysfs_path;
-	int opt, hid_id, attach_fd;
-	struct attach_prog_args args = {
-		.retval = -1,
-	};
-	DECLARE_LIBBPF_OPTS(bpf_test_run_opts, tattr,
-			    .ctx_in = &args,
-			    .ctx_size_in = sizeof(args),
-	);
+	int opt, hid_id;
 
 	while ((opt = getopt(argc, argv, optstr)) != -1) {
 		switch (opt) {
@@ -108,7 +100,7 @@ int main(int argc, char **argv)
 		return 1;
 	}
 
-	skel = hid_mouse__open_and_load();
+	skel = hid_mouse__open();
 	if (!skel) {
 		fprintf(stderr, "%s  %s:%d", __func__, __FILE__, __LINE__);
 		return -1;
@@ -120,27 +112,18 @@ int main(int argc, char **argv)
 		fprintf(stderr, "can not open HID device: %m\n");
 		return 1;
 	}
-	args.hid = hid_id;
+	skel->struct_ops.mouse_invert->hid_id = hid_id;
 
-	attach_fd = bpf_program__fd(skel->progs.attach_prog);
-	if (attach_fd < 0) {
-		fprintf(stderr, "can't locate attach prog: %m\n");
+	err = hid_mouse__load(skel);
+	if (err < 0) {
+		fprintf(stderr, "can not load HID-BPF program: %m\n");
 		return 1;
 	}
 
-	bpf_object__for_each_program(prog, *skel->skeleton->obj) {
-		/* ignore syscalls */
-		if (bpf_program__get_type(prog) != BPF_PROG_TYPE_TRACING)
-			continue;
-
-		args.retval = -1;
-		args.prog_fd = bpf_program__fd(prog);
-		err = bpf_prog_test_run_opts(attach_fd, &tattr);
-		if (err) {
-			fprintf(stderr, "can't attach prog to hid device %d: %m (err: %d)\n",
-				hid_id, err);
-			return 1;
-		}
+	link = bpf_map__attach_struct_ops(skel->maps.mouse_invert);
+	if (!link) {
+		fprintf(stderr, "can not attach HID-BPF program: %m\n");
+		return 1;
 	}
 
 	signal(SIGINT, int_exit);