samples/bpf: Get rid of deprecated libbpf API uses

Replace deprecated APIs with new ones. Also mute source code using deprecated AF_XDP (xsk.h). Figuring out what to do with all the AF_XDP stuff is a separate problem that should be solved with its own set of changes. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
josf · Dec 2, 2021 · c58f981 · c58f981
1 parent 527024f
commit c58f981
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Showing 15 changed files with 108 additions and 57 deletions.
diff --git a/samples/bpf/cookie_uid_helper_example.c b/samples/bpf/cookie_uid_helper_example.c
@@ -67,8 +67,8 @@ static bool test_finish;
 
 static void maps_create(void)
 {
-	map_fd = bpf_create_map(BPF_MAP_TYPE_HASH, sizeof(uint32_t),
-				sizeof(struct stats), 100, 0);
+	map_fd = bpf_map_create(BPF_MAP_TYPE_HASH, NULL, sizeof(uint32_t),
+				sizeof(struct stats), 100, NULL);
 	if (map_fd < 0)
 		error(1, errno, "map create failed!\n");
 }
@@ -157,9 +157,13 @@ static void prog_load(void)
 				offsetof(struct __sk_buff, len)),
 		BPF_EXIT_INSN(),
 	};
-	prog_fd = bpf_load_program(BPF_PROG_TYPE_SOCKET_FILTER, prog,
-					ARRAY_SIZE(prog), "GPL", 0,
-					log_buf, sizeof(log_buf));
+	LIBBPF_OPTS(bpf_prog_load_opts, opts,
+		.log_buf = log_buf,
+		.log_size = sizeof(log_buf),
+	);
+
+	prog_fd = bpf_prog_load(BPF_PROG_TYPE_SOCKET_FILTER, NULL, "GPL",
+				prog, ARRAY_SIZE(prog), &opts);
 	if (prog_fd < 0)
 		error(1, errno, "failed to load prog\n%s\n", log_buf);
 }

diff --git a/samples/bpf/fds_example.c b/samples/bpf/fds_example.c
@@ -54,16 +54,22 @@ static int bpf_prog_create(const char *object)
 	};
 	size_t insns_cnt = sizeof(insns) / sizeof(struct bpf_insn);
 	struct bpf_object *obj;
-	int prog_fd;
+	int err;
 
 	if (object) {
-		assert(!bpf_prog_load(object, BPF_PROG_TYPE_UNSPEC,
-				      &obj, &prog_fd));
-		return prog_fd;
+		obj = bpf_object__open_file(object, NULL);
+		assert(!libbpf_get_error(obj));
+		err = bpf_object__load(obj);
+		assert(!err);
+		return bpf_program__fd(bpf_object__next_program(obj, NULL));
 	} else {
-		return bpf_load_program(BPF_PROG_TYPE_SOCKET_FILTER,
-					insns, insns_cnt, "GPL", 0,
-					bpf_log_buf, BPF_LOG_BUF_SIZE);
+		LIBBPF_OPTS(bpf_prog_load_opts, opts,
+			.log_buf = bpf_log_buf,
+			.log_size = BPF_LOG_BUF_SIZE,
+		);
+
+		return bpf_prog_load(BPF_PROG_TYPE_SOCKET_FILTER, NULL, "GPL",
+				     insns, insns_cnt, &opts);
 	}
 }
 
@@ -73,8 +79,8 @@ static int bpf_do_map(const char *file, uint32_t flags, uint32_t key,
 	int fd, ret;
 
 	if (flags & BPF_F_PIN) {
-		fd = bpf_create_map(BPF_MAP_TYPE_ARRAY, sizeof(uint32_t),
-				    sizeof(uint32_t), 1024, 0);
+		fd = bpf_map_create(BPF_MAP_TYPE_ARRAY, NULL, sizeof(uint32_t),
+				    sizeof(uint32_t), 1024, NULL);
 		printf("bpf: map fd:%d (%s)\n", fd, strerror(errno));
 		assert(fd > 0);
 

diff --git a/samples/bpf/map_perf_test_user.c b/samples/bpf/map_perf_test_user.c
@@ -134,19 +134,22 @@ static void do_test_lru(enum test_type test, int cpu)
 		 */
 		int outer_fd = map_fd[array_of_lru_hashs_idx];
 		unsigned int mycpu, mynode;
+		LIBBPF_OPTS(bpf_map_create_opts, opts,
+			.map_flags = BPF_F_NUMA_NODE,
+		);
 
 		assert(cpu < MAX_NR_CPUS);
 
 		ret = syscall(__NR_getcpu, &mycpu, &mynode, NULL);
 		assert(!ret);
 
+		opts.numa_node = mynode;
 		inner_lru_map_fds[cpu] =
-			bpf_create_map_node(BPF_MAP_TYPE_LRU_HASH,
-					    test_map_names[INNER_LRU_HASH_PREALLOC],
-					    sizeof(uint32_t),
-					    sizeof(long),
-					    inner_lru_hash_size, 0,
-					    mynode);
+			bpf_map_create(BPF_MAP_TYPE_LRU_HASH,
+				       test_map_names[INNER_LRU_HASH_PREALLOC],
+				       sizeof(uint32_t),
+				       sizeof(long),
+				       inner_lru_hash_size, &opts);
 		if (inner_lru_map_fds[cpu] == -1) {
 			printf("cannot create BPF_MAP_TYPE_LRU_HASH %s(%d)\n",
 			       strerror(errno), errno);

diff --git a/samples/bpf/sock_example.c b/samples/bpf/sock_example.c
@@ -37,8 +37,8 @@ static int test_sock(void)
 	int sock = -1, map_fd, prog_fd, i, key;
 	long long value = 0, tcp_cnt, udp_cnt, icmp_cnt;
 
-	map_fd = bpf_create_map(BPF_MAP_TYPE_ARRAY, sizeof(key), sizeof(value),
-				256, 0);
+	map_fd = bpf_map_create(BPF_MAP_TYPE_ARRAY, NULL, sizeof(key), sizeof(value),
+				256, NULL);
 	if (map_fd < 0) {
 		printf("failed to create map '%s'\n", strerror(errno));
 		goto cleanup;
@@ -59,9 +59,13 @@ static int test_sock(void)
 		BPF_EXIT_INSN(),
 	};
 	size_t insns_cnt = sizeof(prog) / sizeof(struct bpf_insn);
+	LIBBPF_OPTS(bpf_prog_load_opts, opts,
+		.log_buf = bpf_log_buf,
+		.log_size = BPF_LOG_BUF_SIZE,
+	);
 
-	prog_fd = bpf_load_program(BPF_PROG_TYPE_SOCKET_FILTER, prog, insns_cnt,
-				   "GPL", 0, bpf_log_buf, BPF_LOG_BUF_SIZE);
+	prog_fd = bpf_prog_load(BPF_PROG_TYPE_SOCKET_FILTER, NULL, "GPL",
+				prog, insns_cnt, &opts);
 	if (prog_fd < 0) {
 		printf("failed to load prog '%s'\n", strerror(errno));
 		goto cleanup;

diff --git a/samples/bpf/sockex1_user.c b/samples/bpf/sockex1_user.c
@@ -11,17 +11,26 @@
 int main(int ac, char **argv)
 {
 	struct bpf_object *obj;
+	struct bpf_program *prog;
 	int map_fd, prog_fd;
 	char filename[256];
-	int i, sock;
+	int i, sock, err;
 	FILE *f;
 
 	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
 
-	if (bpf_prog_load(filename, BPF_PROG_TYPE_SOCKET_FILTER,
-			  &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_SOCKET_FILTER);
+
+	err = bpf_object__load(obj);
+	if (err)
+		return 1;
+
+	prog_fd = bpf_program__fd(prog);
 	map_fd = bpf_object__find_map_fd_by_name(obj, "my_map");
 
 	sock = open_raw_sock("lo");

diff --git a/samples/bpf/sockex2_user.c b/samples/bpf/sockex2_user.c
@@ -16,18 +16,26 @@ struct pair {
 
 int main(int ac, char **argv)
 {
+	struct bpf_program *prog;
 	struct bpf_object *obj;
 	int map_fd, prog_fd;
 	char filename[256];
-	int i, sock;
+	int i, sock, err;
 	FILE *f;
 
 	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
+	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_SOCKET_FILTER);
 
-	if (bpf_prog_load(filename, BPF_PROG_TYPE_SOCKET_FILTER,
-			  &obj, &prog_fd))
+	err = bpf_object__load(obj);
+	if (err)
 		return 1;
 
+	prog_fd = bpf_program__fd(prog);
 	map_fd = bpf_object__find_map_fd_by_name(obj, "hash_map");
 
 	sock = open_raw_sock("lo");

diff --git a/samples/bpf/test_cgrp2_array_pin.c b/samples/bpf/test_cgrp2_array_pin.c
@@ -64,9 +64,9 @@ int main(int argc, char **argv)
 	}
 
 	if (create_array) {
-		array_fd = bpf_create_map(BPF_MAP_TYPE_CGROUP_ARRAY,
+		array_fd = bpf_map_create(BPF_MAP_TYPE_CGROUP_ARRAY, NULL,
 					  sizeof(uint32_t), sizeof(uint32_t),
-					  1, 0);
+					  1, NULL);
 		if (array_fd < 0) {
 			fprintf(stderr,
 				"bpf_create_map(BPF_MAP_TYPE_CGROUP_ARRAY,...): %s(%d)\n",

diff --git a/samples/bpf/test_cgrp2_attach.c b/samples/bpf/test_cgrp2_attach.c
@@ -71,10 +71,13 @@ static int prog_load(int map_fd, int verdict)
 		BPF_EXIT_INSN(),
 	};
 	size_t insns_cnt = sizeof(prog) / sizeof(struct bpf_insn);
+	LIBBPF_OPTS(bpf_prog_load_opts, opts,
+		.log_buf = bpf_log_buf,
+		.log_size = BPF_LOG_BUF_SIZE,
+	);
 
-	return bpf_load_program(BPF_PROG_TYPE_CGROUP_SKB,
-				prog, insns_cnt, "GPL", 0,
-				bpf_log_buf, BPF_LOG_BUF_SIZE);
+	return bpf_prog_load(BPF_PROG_TYPE_CGROUP_SKB, NULL, "GPL",
+			     prog, insns_cnt, &opts);
 }
 
 static int usage(const char *argv0)
@@ -90,9 +93,9 @@ static int attach_filter(int cg_fd, int type, int verdict)
 	int prog_fd, map_fd, ret, key;
 	long long pkt_cnt, byte_cnt;
 
-	map_fd = bpf_create_map(BPF_MAP_TYPE_ARRAY,
+	map_fd = bpf_map_create(BPF_MAP_TYPE_ARRAY, NULL,
 				sizeof(key), sizeof(byte_cnt),
-				256, 0);
+				256, NULL);
 	if (map_fd < 0) {
 		printf("Failed to create map: '%s'\n", strerror(errno));
 		return EXIT_FAILURE;

diff --git a/samples/bpf/test_cgrp2_sock.c b/samples/bpf/test_cgrp2_sock.c
@@ -70,6 +70,10 @@ static int prog_load(__u32 idx, __u32 mark, __u32 prio)
 		BPF_MOV64_IMM(BPF_REG_2, offsetof(struct bpf_sock, priority)),
 		BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_3, offsetof(struct bpf_sock, priority)),
 	};
+	LIBBPF_OPTS(bpf_prog_load_opts, opts,
+		.log_buf = bpf_log_buf,
+		.log_size = BPF_LOG_BUF_SIZE,
+	);
 
 	struct bpf_insn *prog;
 	size_t insns_cnt;
@@ -115,8 +119,8 @@ static int prog_load(__u32 idx, __u32 mark, __u32 prio)
 
 	insns_cnt /= sizeof(struct bpf_insn);
 
-	ret = bpf_load_program(BPF_PROG_TYPE_CGROUP_SOCK, prog, insns_cnt,
-				"GPL", 0, bpf_log_buf, BPF_LOG_BUF_SIZE);
+	ret = bpf_prog_load(BPF_PROG_TYPE_CGROUP_SOCK, NULL, "GPL",
+			    prog, insns_cnt, &opts);
 
 	free(prog);
 

diff --git a/samples/bpf/test_lru_dist.c b/samples/bpf/test_lru_dist.c
@@ -105,10 +105,10 @@ struct pfect_lru {
 static void pfect_lru_init(struct pfect_lru *lru, unsigned int lru_size,
 			   unsigned int nr_possible_elems)
 {
-	lru->map_fd = bpf_create_map(BPF_MAP_TYPE_HASH,
+	lru->map_fd = bpf_map_create(BPF_MAP_TYPE_HASH, NULL,
 				     sizeof(unsigned long long),
 				     sizeof(struct pfect_lru_node *),
-				     nr_possible_elems, 0);
+				     nr_possible_elems, NULL);
 	assert(lru->map_fd != -1);
 
 	lru->free_nodes = malloc(lru_size * sizeof(struct pfect_lru_node));
@@ -207,10 +207,13 @@ static unsigned int read_keys(const char *dist_file,
 
 static int create_map(int map_type, int map_flags, unsigned int size)
 {
+	LIBBPF_OPTS(bpf_map_create_opts, opts,
+		.map_flags = map_flags,
+	);
 	int map_fd;
 
-	map_fd = bpf_create_map(map_type, sizeof(unsigned long long),
-				sizeof(unsigned long long), size, map_flags);
+	map_fd = bpf_map_create(map_type, NULL, sizeof(unsigned long long),
+				sizeof(unsigned long long), size, &opts);
 
 	if (map_fd == -1)
 		perror("bpf_create_map");

diff --git a/samples/bpf/trace_output_user.c b/samples/bpf/trace_output_user.c
@@ -43,7 +43,6 @@ static void print_bpf_output(void *ctx, int cpu, void *data, __u32 size)
 
 int main(int argc, char **argv)
 {
-	struct perf_buffer_opts pb_opts = {};
 	struct bpf_link *link = NULL;
 	struct bpf_program *prog;
 	struct perf_buffer *pb;
@@ -84,8 +83,7 @@ int main(int argc, char **argv)
 		goto cleanup;
 	}
 
-	pb_opts.sample_cb = print_bpf_output;
-	pb = perf_buffer__new(map_fd, 8, &pb_opts);
+	pb = perf_buffer__new(map_fd, 8, print_bpf_output, NULL, NULL, NULL);
 	ret = libbpf_get_error(pb);
 	if (ret) {
 		printf("failed to setup perf_buffer: %d\n", ret);

diff --git a/samples/bpf/xdp_sample_pkts_user.c b/samples/bpf/xdp_sample_pkts_user.c
@@ -110,12 +110,9 @@ 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 perf_buffer_opts pb_opts = {};
 	const char *optstr = "FS";
 	int prog_fd, map_fd, opt;
+	struct bpf_program *prog;
 	struct bpf_object *obj;
 	struct bpf_map *map;
 	char filename[256];
@@ -144,15 +141,19 @@ 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)
 		return 1;
-	}
+
+	prog_fd = bpf_program__fd(prog);
 
 	map = bpf_object__next_map(obj, NULL);
 	if (!map) {
@@ -181,8 +182,7 @@ int main(int argc, char **argv)
 		return 1;
 	}
 
-	pb_opts.sample_cb = print_bpf_output;
-	pb = perf_buffer__new(map_fd, 8, &pb_opts);
+	pb = perf_buffer__new(map_fd, 8, print_bpf_output, NULL, NULL, NULL);
 	err = libbpf_get_error(pb);
 	if (err) {
 		perror("perf_buffer setup failed");

diff --git a/samples/bpf/xdpsock_ctrl_proc.c b/samples/bpf/xdpsock_ctrl_proc.c
@@ -15,6 +15,9 @@
 #include <bpf/xsk.h>
 #include "xdpsock.h"
 
+/* libbpf APIs for AF_XDP are deprecated starting from v0.7 */
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+
 static const char *opt_if = "";
 
 static struct option long_options[] = {

diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c
@@ -36,6 +36,9 @@
 #include <bpf/bpf.h>
 #include "xdpsock.h"
 
+/* libbpf APIs for AF_XDP are deprecated starting from v0.7 */
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+
 #ifndef SOL_XDP
 #define SOL_XDP 283
 #endif

diff --git a/samples/bpf/xsk_fwd.c b/samples/bpf/xsk_fwd.c
@@ -27,6 +27,9 @@
 #include <bpf/xsk.h>
 #include <bpf/bpf.h>
 
+/* libbpf APIs for AF_XDP are deprecated starting from v0.7 */
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 
 typedef __u64 u64;