Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) #define _GNU_SOURCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <bpf/libbpf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) int main(int argc, char **argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 	struct bpf_link *link = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 	struct bpf_program *prog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 	struct bpf_object *obj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	char filename[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	char command[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	FILE *f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	if (!argv[1]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 		fprintf(stderr, "ERROR: Run with the btrfs device argument!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	obj = bpf_object__open_file(filename, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	if (libbpf_get_error(obj)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		fprintf(stderr, "ERROR: opening BPF object file failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	prog = bpf_object__find_program_by_name(obj, "bpf_prog1");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	if (!prog) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		fprintf(stderr, "ERROR: finding a prog in obj file failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	/* load BPF program */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	if (bpf_object__load(obj)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		fprintf(stderr, "ERROR: loading BPF object file failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 		goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	link = bpf_program__attach(prog);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	if (libbpf_get_error(link)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 		fprintf(stderr, "ERROR: bpf_program__attach failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		link = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	snprintf(command, 256, "mount %s tmpmnt/", argv[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	f = popen(command, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	ret = pclose(f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) cleanup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	bpf_link__destroy(link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	bpf_object__close(obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	return ret ? 0 : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }