samples/bpf: Get rid of bpf_prog_load_xattr() use

Remove all the remaining uses of deprecated bpf_prog_load_xattr() API.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/bpf/20220202225916.3313522-7-andrii@kernel.org

samples/bpf/xdp1_user.c

@@ -79,13 +79,11 @@ static void usage(const char *prog)
 
 int main(int argc, char **argv)
 {
-	struct bpf_prog_load_attr prog_load_attr = {
-		.prog_type	= BPF_PROG_TYPE_XDP,
-	};
 	struct bpf_prog_info info = {};
 	__u32 info_len = sizeof(info);
 	const char *optstr = "FSN";
 	int prog_fd, map_fd, opt;
+	struct bpf_program *prog;
 	struct bpf_object *obj;
 	struct bpf_map *map;
 	char filename[256];
@@ -123,11 +121,19 @@ int main(int argc, char **argv)
 	}
 
 	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
-	prog_load_attr.file = filename;
+	obj = bpf_object__open_file(filename, NULL);
+	if (libbpf_get_error(obj))
+		return 1;
+
+	prog = bpf_object__next_program(obj, NULL);
+	bpf_program__set_type(prog, BPF_PROG_TYPE_XDP);
 
-	if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd))
+	err = bpf_object__load(obj);
+	if (err)
 		return 1;
 
+	prog_fd = bpf_program__fd(prog);
+
 	map = bpf_object__next_map(obj, NULL);
 	if (!map) {
 		printf("finding a map in obj file failed\n");

samples/bpf/xdp_adjust_tail_user.c

@@ -82,15 +82,13 @@ static void usage(const char *cmd)
 
 int main(int argc, char **argv)
 {
-	struct bpf_prog_load_attr prog_load_attr = {
-		.prog_type	= BPF_PROG_TYPE_XDP,
-	};
 	unsigned char opt_flags[256] = {};
 	const char *optstr = "i:T:P:SNFh";
 	struct bpf_prog_info info = {};
 	__u32 info_len = sizeof(info);
 	unsigned int kill_after_s = 0;
 	int i, prog_fd, map_fd, opt;
+	struct bpf_program *prog;
 	struct bpf_object *obj;
 	__u32 max_pckt_size = 0;
 	__u32 key = 0;
@@ -148,11 +146,20 @@ int main(int argc, char **argv)
 	}
 
 	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
-	prog_load_attr.file = filename;
 
-	if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd))
+	obj = bpf_object__open_file(filename, NULL);
+	if (libbpf_get_error(obj))
 		return 1;
 
+	prog = bpf_object__next_program(obj, NULL);
+	bpf_program__set_type(prog, BPF_PROG_TYPE_XDP);
+
+	err = bpf_object__load(obj);
+	if (err)
+		return 1;
+
+	prog_fd = bpf_program__fd(prog);
+
 	/* static global var 'max_pcktsz' is accessible from .data section */
 	if (max_pckt_size) {
 		map_fd = bpf_object__find_map_fd_by_name(obj, "xdp_adju.data");

samples/bpf/xdp_fwd_user.c

@@ -75,14 +75,11 @@ static void usage(const char *prog)
 
 int main(int argc, char **argv)
 {
-	struct bpf_prog_load_attr prog_load_attr = {
-		.prog_type	= BPF_PROG_TYPE_XDP,
-	};
 	const char *prog_name = "xdp_fwd";
 	struct bpf_program *prog = NULL;
 	struct bpf_program *pos;
 	const char *sec_name;
-	int prog_fd, map_fd = -1;
+	int prog_fd = -1, map_fd = -1;
 	char filename[PATH_MAX];
 	struct bpf_object *obj;
 	int opt, i, idx, err;
@@ -119,7 +116,6 @@ int main(int argc, char **argv)
 
 	if (attach) {
 		snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
-		prog_load_attr.file = filename;
 
 		if (access(filename, O_RDONLY) < 0) {
 			printf("error accessing file %s: %s\n",
@@ -127,7 +123,14 @@ int main(int argc, char **argv)
 			return 1;
 		}
 
-		err = bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd);
+		obj = bpf_object__open_file(filename, NULL);
+		if (libbpf_get_error(obj))
+			return 1;
+
+		prog = bpf_object__next_program(obj, NULL);
+		bpf_program__set_type(prog, BPF_PROG_TYPE_XDP);
+
+		err = bpf_object__load(obj);
 		if (err) {
 			printf("Does kernel support devmap lookup?\n");
 			/* If not, the error message will be:

samples/bpf/xdp_router_ipv4_user.c

@@ -640,12 +640,10 @@ static void usage(const char *prog)
 
 int main(int ac, char **argv)
 {
-	struct bpf_prog_load_attr prog_load_attr = {
-		.prog_type	= BPF_PROG_TYPE_XDP,
-	};
 	struct bpf_prog_info info = {};
 	__u32 info_len = sizeof(info);
 	const char *optstr = "SF";
+	struct bpf_program *prog;
 	struct bpf_object *obj;
 	char filename[256];
 	char **ifname_list;
@@ -653,7 +651,6 @@ int main(int ac, char **argv)
 	int err, i = 1;
 
 	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
-	prog_load_attr.file = filename;
 
 	total_ifindex = ac - 1;
 	ifname_list = (argv + 1);
@@ -684,14 +681,20 @@ int main(int ac, char **argv)
 		return 1;
 	}
 
-	if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd))
+	obj = bpf_object__open_file(filename, NULL);
+	if (libbpf_get_error(obj))
 		return 1;
 
+	prog = bpf_object__next_program(obj, NULL);
+	bpf_program__set_type(prog, BPF_PROG_TYPE_XDP);
+
 	printf("\n******************loading bpf file*********************\n");
-	if (!prog_fd) {
-		printf("bpf_prog_load_xattr: %s\n", strerror(errno));
+	err = bpf_object__load(obj);
+	if (err) {
+		printf("bpf_object__load(): %s\n", strerror(errno));
 		return 1;
 	}
+	prog_fd = bpf_program__fd(prog);
 
 	lpm_map_fd = bpf_object__find_map_fd_by_name(obj, "lpm_map");
 	rxcnt_map_fd = bpf_object__find_map_fd_by_name(obj, "rxcnt");

samples/bpf/xdp_rxq_info_user.c

@@ -450,14 +450,12 @@ static void stats_poll(int interval, int action, __u32 cfg_opt)
 int main(int argc, char **argv)
 {
 	__u32 cfg_options= NO_TOUCH ; /* Default: Don't touch packet memory */
-	struct bpf_prog_load_attr prog_load_attr = {
-		.prog_type	= BPF_PROG_TYPE_XDP,
-	};
 	struct bpf_prog_info info = {};
 	__u32 info_len = sizeof(info);
 	int prog_fd, map_fd, opt, err;
 	bool use_separators = true;
 	struct config cfg = { 0 };
+	struct bpf_program *prog;
 	struct bpf_object *obj;
 	struct bpf_map *map;
 	char filename[256];
@@ -471,11 +469,19 @@ int main(int argc, char **argv)
 	char *action_str = NULL;
 
 	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
-	prog_load_attr.file = filename;
 
-	if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd))
+	obj = bpf_object__open_file(filename, NULL);
+	if (libbpf_get_error(obj))
 		return EXIT_FAIL;
 
+	prog = bpf_object__next_program(obj, NULL);
+	bpf_program__set_type(prog, BPF_PROG_TYPE_XDP);
+
+	err = bpf_object__load(obj);
+	if (err)
+		return EXIT_FAIL;
+	prog_fd = bpf_program__fd(prog);
+
 	map =  bpf_object__find_map_by_name(obj, "config_map");
 	stats_global_map = bpf_object__find_map_by_name(obj, "stats_global_map");
 	rx_queue_index_map = bpf_object__find_map_by_name(obj, "rx_queue_index_map");

samples/bpf/xdp_tx_iptunnel_user.c

@@ -152,9 +152,6 @@ static int parse_ports(const char *port_str, int *min_port, int *max_port)
 
 int main(int argc, char **argv)
 {
-	struct bpf_prog_load_attr prog_load_attr = {
-		.prog_type	= BPF_PROG_TYPE_XDP,
-	};
 	int min_port = 0, max_port = 0, vip2tnl_map_fd;
 	const char *optstr = "i:a:p:s:d:m:T:P:FSNh";
 	unsigned char opt_flags[256] = {};
@@ -162,6 +159,7 @@ int main(int argc, char **argv)
 	__u32 info_len = sizeof(info);
 	unsigned int kill_after_s = 0;
 	struct iptnl_info tnl = {};
+	struct bpf_program *prog;
 	struct bpf_object *obj;
 	struct vip vip = {};
 	char filename[256];
@@ -259,15 +257,20 @@ int main(int argc, char **argv)
 	}
 
 	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
-	prog_load_attr.file = filename;
 
-	if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd))
+	obj = bpf_object__open_file(filename, NULL);
+	if (libbpf_get_error(obj))
 		return 1;
 
-	if (!prog_fd) {
-		printf("bpf_prog_load_xattr: %s\n", strerror(errno));
+	prog = bpf_object__next_program(obj, NULL);
+	bpf_program__set_type(prog, BPF_PROG_TYPE_XDP);
+
+	err = bpf_object__load(obj);
+	if (err) {
+		printf("bpf_object__load(): %s\n", strerror(errno));
 		return 1;
 	}
+	prog_fd = bpf_program__fd(prog);
 
 	rxcnt_map_fd = bpf_object__find_map_fd_by_name(obj, "rxcnt");
 	vip2tnl_map_fd = bpf_object__find_map_fd_by_name(obj, "vip2tnl");