Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Andrii Nakryiko says:

====================
bpf-next 2021-12-10 v2

We've added 115 non-merge commits during the last 26 day(s) which contain
a total of 182 files changed, 5747 insertions(+), 2564 deletions(-).

The main changes are:

1) Various samples fixes, from Alexander Lobakin.

2) BPF CO-RE support in kernel and light skeleton, from Alexei Starovoitov.

3) A batch of new unified APIs for libbpf, logging improvements, version
   querying, etc. Also a batch of old deprecations for old APIs and various
   bug fixes, in preparation for libbpf 1.0, from Andrii Nakryiko.

4) BPF documentation reorganization and improvements, from Christoph Hellwig
   and Dave Tucker.

5) Support for declarative initialization of BPF_MAP_TYPE_PROG_ARRAY in
   libbpf, from Hengqi Chen.

6) Verifier log fixes, from Hou Tao.

7) Runtime-bounded loops support with bpf_loop() helper, from Joanne Koong.

8) Extend branch record capturing to all platforms that support it,
   from Kajol Jain.

9) Light skeleton codegen improvements, from Kumar Kartikeya Dwivedi.

10) bpftool doc-generating script improvements, from Quentin Monnet.

11) Two libbpf v0.6 bug fixes, from Shuyi Cheng and Vincent Minet.

12) Deprecation warning fix for perf/bpf_counter, from Song Liu.

13) MAX_TAIL_CALL_CNT unification and MIPS build fix for libbpf,
    from Tiezhu Yang.

14) BTF_KING_TYPE_TAG follow-up fixes, from Yonghong Song.

15) Selftests fixes and improvements, from Ilya Leoshkevich, Jean-Philippe
    Brucker, Jiri Olsa, Maxim Mikityanskiy, Tirthendu Sarkar, Yucong Sun,
    and others.

* https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (115 commits)
  libbpf: Add "bool skipped" to struct bpf_map
  libbpf: Fix typo in btf__dedup@LIBBPF_0.0.2 definition
  bpftool: Switch bpf_object__load_xattr() to bpf_object__load()
  selftests/bpf: Remove the only use of deprecated bpf_object__load_xattr()
  selftests/bpf: Add test for libbpf's custom log_buf behavior
  selftests/bpf: Replace all uses of bpf_load_btf() with bpf_btf_load()
  libbpf: Deprecate bpf_object__load_xattr()
  libbpf: Add per-program log buffer setter and getter
  libbpf: Preserve kernel error code and remove kprobe prog type guessing
  libbpf: Improve logging around BPF program loading
  libbpf: Allow passing user log setting through bpf_object_open_opts
  libbpf: Allow passing preallocated log_buf when loading BTF into kernel
  libbpf: Add OPTS-based bpf_btf_load() API
  libbpf: Fix bpf_prog_load() log_buf logic for log_level 0
  samples/bpf: Remove unneeded variable
  bpf: Remove redundant assignment to pointer t
  selftests/bpf: Fix a compilation warning
  perf/bpf_counter: Use bpf_map_create instead of bpf_create_map
  samples: bpf: Fix 'unknown warning group' build warning on Clang
  samples: bpf: Fix xdp_sample_user.o linking with Clang
  ...
====================

Link: https://lore.kernel.org/r/20211210234746.2100561-1-andrii@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

20 files changed, 128 insertions, 84 deletions

diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index a886dff1ba89..38638845db9d 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -215,6 +215,11 @@ TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib
 endif
 
 TPROGS_LDLIBS			+= $(LIBBPF) -lelf -lz
+TPROGLDLIBS_xdp_monitor		+= -lm
+TPROGLDLIBS_xdp_redirect	+= -lm
+TPROGLDLIBS_xdp_redirect_cpu	+= -lm
+TPROGLDLIBS_xdp_redirect_map	+= -lm
+TPROGLDLIBS_xdp_redirect_map_multi += -lm
 TPROGLDLIBS_tracex4		+= -lrt
 TPROGLDLIBS_trace_output	+= -lrt
 TPROGLDLIBS_map_perf_test	+= -lrt
@@ -328,7 +333,7 @@ $(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF)
 $(src)/*.c: verify_target_bpf $(LIBBPF)
 
 libbpf_hdrs: $(LIBBPF)
-$(obj)/$(TRACE_HELPERS): | libbpf_hdrs
+$(obj)/$(TRACE_HELPERS) $(obj)/$(CGROUP_HELPERS) $(obj)/$(XDP_SAMPLE): | libbpf_hdrs
 
 .PHONY: libbpf_hdrs
 
@@ -343,6 +348,17 @@ $(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
 $(obj)/hbm.o: $(src)/hbm.h
 $(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
 
+# Override includes for xdp_sample_user.o because $(srctree)/usr/include in
+# TPROGS_CFLAGS causes conflicts
+XDP_SAMPLE_CFLAGS += -Wall -O2 \
+		     -I$(src)/../../tools/include \
+		     -I$(src)/../../tools/include/uapi \
+		     -I$(LIBBPF_INCLUDE) \
+		     -I$(src)/../../tools/testing/selftests/bpf
+
+$(obj)/$(XDP_SAMPLE): TPROGS_CFLAGS = $(XDP_SAMPLE_CFLAGS)
+$(obj)/$(XDP_SAMPLE): $(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h
+
 -include $(BPF_SAMPLES_PATH)/Makefile.target
 
 VMLINUX_BTF_PATHS ?= $(abspath $(if $(O),$(O)/vmlinux))				\
diff --git a/samples/bpf/Makefile.target b/samples/bpf/Makefile.target
index 5a368affa038..7621f55e2947 100644
--- a/samples/bpf/Makefile.target
+++ b/samples/bpf/Makefile.target
@@ -73,14 +73,3 @@ quiet_cmd_tprog-cobjs	= CC  $@
       cmd_tprog-cobjs	= $(CC) $(tprogc_flags) -c -o $@ $<
 $(tprog-cobjs): $(obj)/%.o: $(src)/%.c FORCE
 	$(call if_changed_dep,tprog-cobjs)
-
-# Override includes for xdp_sample_user.o because $(srctree)/usr/include in
-# TPROGS_CFLAGS causes conflicts
-XDP_SAMPLE_CFLAGS += -Wall -O2 -lm \
-		     -I./tools/include \
-		     -I./tools/include/uapi \
-		     -I./tools/lib \
-		     -I./tools/testing/selftests/bpf
-$(obj)/xdp_sample_user.o: $(src)/xdp_sample_user.c \
-	$(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h
-	$(CC) $(XDP_SAMPLE_CFLAGS) -c -o $@ $<
diff --git a/samples/bpf/cookie_uid_helper_example.c b/samples/bpf/cookie_uid_helper_example.c
index 54958802c032..f0df3dda4b1f 100644
--- 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
index 59f45fef5110..16dbf49e0f19 100644
--- a/samples/bpf/fds_example.c
+++ b/samples/bpf/fds_example.c
@@ -46,12 +46,6 @@ static void usage(void)
 	printf("       -h          Display this help.\n");
 }
 
-static int bpf_map_create(void)
-{
-	return bpf_create_map(BPF_MAP_TYPE_ARRAY, sizeof(uint32_t),
-			      sizeof(uint32_t), 1024, 0);
-}
-
 static int bpf_prog_create(const char *object)
 {
 	static struct bpf_insn insns[] = {
@@ -60,16 +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);
 	}
 }
 
@@ -79,7 +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_map_create();
+		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/lwt_len_hist_kern.c b/samples/bpf/lwt_len_hist_kern.c
index 9ed63e10e170..1fa14c54963a 100644
--- a/samples/bpf/lwt_len_hist_kern.c
+++ b/samples/bpf/lwt_len_hist_kern.c
@@ -16,13 +16,6 @@
 #include <uapi/linux/in.h>
 #include <bpf/bpf_helpers.h>
 
-# define printk(fmt, ...)						\
-		({							\
-			char ____fmt[] = fmt;				\
-			bpf_trace_printk(____fmt, sizeof(____fmt),	\
-				     ##__VA_ARGS__);			\
-		})
-
 struct bpf_elf_map {
 	__u32 type;
 	__u32 size_key;
diff --git a/samples/bpf/map_perf_test_user.c b/samples/bpf/map_perf_test_user.c
index 9db949290a78..319fd31522f3 100644
--- 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
index 23d1930e1927..a88f69504c08 100644
--- 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
index 3c83722877dc..9e8d39e245c1 100644
--- 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
index bafa567b840c..6a3fd369d3fc 100644
--- 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
index 6d564aa75447..05e88aa63009 100644
--- 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
index 390ff38d2ac6..6d90874b09c3 100644
--- 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
index b0811da5a00f..a0811df888f4 100644
--- 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
index c92c5c06b965..75e877853596 100644
--- 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
index 364b98764d54..371732f9cf8e 100644
--- 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_redirect_cpu.bpf.c b/samples/bpf/xdp_redirect_cpu.bpf.c
index f10fe3cf25f6..25e3a405375f 100644
--- a/samples/bpf/xdp_redirect_cpu.bpf.c
+++ b/samples/bpf/xdp_redirect_cpu.bpf.c
@@ -100,7 +100,6 @@ u16 get_dest_port_ipv4_udp(struct xdp_md *ctx, u64 nh_off)
 	void *data     = (void *)(long)ctx->data;
 	struct iphdr *iph = data + nh_off;
 	struct udphdr *udph;
-	u16 dport;
 
 	if (iph + 1 > data_end)
 		return 0;
@@ -111,8 +110,7 @@ u16 get_dest_port_ipv4_udp(struct xdp_md *ctx, u64 nh_off)
 	if (udph + 1 > data_end)
 		return 0;
 
-	dport = bpf_ntohs(udph->dest);
-	return dport;
+	return bpf_ntohs(udph->dest);
 }
 
 static __always_inline
diff --git a/samples/bpf/xdp_sample_pkts_user.c b/samples/bpf/xdp_sample_pkts_user.c
index f4382ccdcbb1..587eacb49103 100644
--- 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/xdp_sample_user.h b/samples/bpf/xdp_sample_user.h
index d97465ff8c62..5f44b877ecf5 100644
--- a/samples/bpf/xdp_sample_user.h
+++ b/samples/bpf/xdp_sample_user.h
@@ -45,7 +45,9 @@ const char *get_driver_name(int ifindex);
 int get_mac_addr(int ifindex, void *mac_addr);
 
 #pragma GCC diagnostic push
+#ifndef __clang__
 #pragma GCC diagnostic ignored "-Wstringop-truncation"
+#endif
 __attribute__((unused))
 static inline char *safe_strncpy(char *dst, const char *src, size_t size)
 {
diff --git a/samples/bpf/xdpsock_ctrl_proc.c b/samples/bpf/xdpsock_ctrl_proc.c
index 384e62e3c6d6..cc4408797ab7 100644
--- 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
index 49d7a6ad7e39..616d663d55aa 100644
--- 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
index 1cd97c84c337..52e7c4ffd228 100644
--- 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;