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

Daniel Borkmann says:

====================
pull-request: bpf-next 2021-11-15

We've added 72 non-merge commits during the last 13 day(s) which contain
a total of 171 files changed, 2728 insertions(+), 1143 deletions(-).

The main changes are:

1) Add btf_type_tag attributes to bring kernel annotations like __user/__rcu to
   BTF such that BPF verifier will be able to detect misuse, from Yonghong Song.

2) Big batch of libbpf improvements including various fixes, future proofing APIs,
   and adding a unified, OPTS-based bpf_prog_load() low-level API, from Andrii Nakryiko.

3) Add ingress_ifindex to BPF_SK_LOOKUP program type for selectively applying the
   programmable socket lookup logic to packets from a given netdev, from Mark Pashmfouroush.

4) Remove the 128M upper JIT limit for BPF programs on arm64 and add selftest to
   ensure exception handling still works, from Russell King and Alan Maguire.

5) Add a new bpf_find_vma() helper for tracing to map an address to the backing
   file such as shared library, from Song Liu.

6) Batch of various misc fixes to bpftool, fixing a memory leak in BPF program dump,
   updating documentation and bash-completion among others, from Quentin Monnet.

7) Deprecate libbpf bpf_program__get_prog_info_linear() API and migrate its users as
   the API is heavily tailored around perf and is non-generic, from Dave Marchevsky.

8) Enable libbpf's strict mode by default in bpftool and add a --legacy option as an
   opt-out for more relaxed BPF program requirements, from Stanislav Fomichev.

9) Fix bpftool to use libbpf_get_error() to check for errors, from Hengqi Chen.

* https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (72 commits)
  bpftool: Use libbpf_get_error() to check error
  bpftool: Fix mixed indentation in documentation
  bpftool: Update the lists of names for maps and prog-attach types
  bpftool: Fix indent in option lists in the documentation
  bpftool: Remove inclusion of utilities.mak from Makefiles
  bpftool: Fix memory leak in prog_dump()
  selftests/bpf: Fix a tautological-constant-out-of-range-compare compiler warning
  selftests/bpf: Fix an unused-but-set-variable compiler warning
  bpf: Introduce btf_tracing_ids
  bpf: Extend BTF_ID_LIST_GLOBAL with parameter for number of IDs
  bpftool: Enable libbpf's strict mode by default
  docs/bpf: Update documentation for BTF_KIND_TYPE_TAG support
  selftests/bpf: Clarify llvm dependency with btf_tag selftest
  selftests/bpf: Add a C test for btf_type_tag
  selftests/bpf: Rename progs/tag.c to progs/btf_decl_tag.c
  selftests/bpf: Test BTF_KIND_DECL_TAG for deduplication
  selftests/bpf: Add BTF_KIND_TYPE_TAG unit tests
  selftests/bpf: Test libbpf API function btf__add_type_tag()
  bpftool: Support BTF_KIND_TYPE_TAG
  libbpf: Support BTF_KIND_TYPE_TAG
  ...
====================

Link: https://lore.kernel.org/r/20211115162008.25916-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 224 insertions, 152 deletions

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index a1bea1953df6..de7e09a6b5ec 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -197,6 +197,8 @@ enum kern_feature_id {
 	FEAT_PERF_LINK,
 	/* BTF_KIND_DECL_TAG support */
 	FEAT_BTF_DECL_TAG,
+	/* BTF_KIND_TYPE_TAG support */
+	FEAT_BTF_TYPE_TAG,
 	__FEAT_CNT,
 };
 
@@ -221,7 +223,7 @@ struct reloc_desc {
 struct bpf_sec_def;
 
 typedef int (*init_fn_t)(struct bpf_program *prog, long cookie);
-typedef int (*preload_fn_t)(struct bpf_program *prog, struct bpf_prog_load_params *attr, long cookie);
+typedef int (*preload_fn_t)(struct bpf_program *prog, struct bpf_prog_load_opts *opts, long cookie);
 typedef struct bpf_link *(*attach_fn_t)(const struct bpf_program *prog, long cookie);
 
 /* stored as sec_def->cookie for all libbpf-supported SEC()s */
@@ -2076,6 +2078,7 @@ static const char *__btf_kind_str(__u16 kind)
 	case BTF_KIND_DATASEC: return "datasec";
 	case BTF_KIND_FLOAT: return "float";
 	case BTF_KIND_DECL_TAG: return "decl_tag";
+	case BTF_KIND_TYPE_TAG: return "type_tag";
 	default: return "unknown";
 	}
 }
@@ -2588,8 +2591,10 @@ static bool btf_needs_sanitization(struct bpf_object *obj)
 	bool has_float = kernel_supports(obj, FEAT_BTF_FLOAT);
 	bool has_func = kernel_supports(obj, FEAT_BTF_FUNC);
 	bool has_decl_tag = kernel_supports(obj, FEAT_BTF_DECL_TAG);
+	bool has_type_tag = kernel_supports(obj, FEAT_BTF_TYPE_TAG);
 
-	return !has_func || !has_datasec || !has_func_global || !has_float || !has_decl_tag;
+	return !has_func || !has_datasec || !has_func_global || !has_float ||
+	       !has_decl_tag || !has_type_tag;
 }
 
 static void bpf_object__sanitize_btf(struct bpf_object *obj, struct btf *btf)
@@ -2599,6 +2604,7 @@ static void bpf_object__sanitize_btf(struct bpf_object *obj, struct btf *btf)
 	bool has_float = kernel_supports(obj, FEAT_BTF_FLOAT);
 	bool has_func = kernel_supports(obj, FEAT_BTF_FUNC);
 	bool has_decl_tag = kernel_supports(obj, FEAT_BTF_DECL_TAG);
+	bool has_type_tag = kernel_supports(obj, FEAT_BTF_TYPE_TAG);
 	struct btf_type *t;
 	int i, j, vlen;
 
@@ -2657,6 +2663,10 @@ static void bpf_object__sanitize_btf(struct bpf_object *obj, struct btf *btf)
 			 */
 			t->name_off = 0;
 			t->info = BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 0);
+		} else if (!has_type_tag && btf_is_type_tag(t)) {
+			/* replace TYPE_TAG with a CONST */
+			t->name_off = 0;
+			t->info = BTF_INFO_ENC(BTF_KIND_CONST, 0, 0);
 		}
 	}
 }
@@ -2752,13 +2762,12 @@ static int btf_fixup_datasec(struct bpf_object *obj, struct btf *btf,
 
 	for (i = 0, vsi = btf_var_secinfos(t); i < vars; i++, vsi++) {
 		t_var = btf__type_by_id(btf, vsi->type);
-		var = btf_var(t_var);
-
-		if (!btf_is_var(t_var)) {
+		if (!t_var || !btf_is_var(t_var)) {
 			pr_debug("Non-VAR type seen in section %s\n", name);
 			return -EINVAL;
 		}
 
+		var = btf_var(t_var);
 		if (var->linkage == BTF_VAR_STATIC)
 			continue;
 
@@ -3191,11 +3200,11 @@ static int bpf_object__elf_collect(struct bpf_object *obj)
 	Elf_Scn *scn;
 	Elf64_Shdr *sh;
 
-	/* ELF section indices are 1-based, so allocate +1 element to keep
-	 * indexing simple. Also include 0th invalid section into sec_cnt for
-	 * simpler and more traditional iteration logic.
+	/* ELF section indices are 0-based, but sec #0 is special "invalid"
+	 * section. e_shnum does include sec #0, so e_shnum is the necessary
+	 * size of an array to keep all the sections.
 	 */
-	obj->efile.sec_cnt = 1 + obj->efile.ehdr->e_shnum;
+	obj->efile.sec_cnt = obj->efile.ehdr->e_shnum;
 	obj->efile.secs = calloc(obj->efile.sec_cnt, sizeof(*obj->efile.secs));
 	if (!obj->efile.secs)
 		return -ENOMEM;
@@ -3271,8 +3280,12 @@ static int bpf_object__elf_collect(struct bpf_object *obj)
 		} else if (strcmp(name, MAPS_ELF_SEC) == 0) {
 			obj->efile.btf_maps_shndx = idx;
 		} else if (strcmp(name, BTF_ELF_SEC) == 0) {
+			if (sh->sh_type != SHT_PROGBITS)
+				return -LIBBPF_ERRNO__FORMAT;
 			btf_data = data;
 		} else if (strcmp(name, BTF_EXT_ELF_SEC) == 0) {
+			if (sh->sh_type != SHT_PROGBITS)
+				return -LIBBPF_ERRNO__FORMAT;
 			btf_ext_data = data;
 		} else if (sh->sh_type == SHT_SYMTAB) {
 			/* already processed during the first pass above */
@@ -3303,6 +3316,10 @@ static int bpf_object__elf_collect(struct bpf_object *obj)
 		} else if (sh->sh_type == SHT_REL) {
 			int targ_sec_idx = sh->sh_info; /* points to other section */
 
+			if (sh->sh_entsize != sizeof(Elf64_Rel) ||
+			    targ_sec_idx >= obj->efile.sec_cnt)
+				return -LIBBPF_ERRNO__FORMAT;
+
 			/* Only do relo for section with exec instructions */
 			if (!section_have_execinstr(obj, targ_sec_idx) &&
 			    strcmp(name, ".rel" STRUCT_OPS_SEC) &&
@@ -3555,7 +3572,7 @@ static int bpf_object__collect_externs(struct bpf_object *obj)
 
 	scn = elf_sec_by_idx(obj, obj->efile.symbols_shndx);
 	sh = elf_sec_hdr(obj, scn);
-	if (!sh)
+	if (!sh || sh->sh_entsize != sizeof(Elf64_Sym))
 		return -LIBBPF_ERRNO__FORMAT;
 
 	dummy_var_btf_id = add_dummy_ksym_var(obj->btf);
@@ -4022,7 +4039,7 @@ static int
 bpf_object__collect_prog_relos(struct bpf_object *obj, Elf64_Shdr *shdr, Elf_Data *data)
 {
 	const char *relo_sec_name, *sec_name;
-	size_t sec_idx = shdr->sh_info;
+	size_t sec_idx = shdr->sh_info, sym_idx;
 	struct bpf_program *prog;
 	struct reloc_desc *relos;
 	int err, i, nrels;
@@ -4033,6 +4050,9 @@ bpf_object__collect_prog_relos(struct bpf_object *obj, Elf64_Shdr *shdr, Elf_Dat
 	Elf64_Sym *sym;
 	Elf64_Rel *rel;
 
+	if (sec_idx >= obj->efile.sec_cnt)
+		return -EINVAL;
+
 	scn = elf_sec_by_idx(obj, sec_idx);
 	scn_data = elf_sec_data(obj, scn);
 
@@ -4052,16 +4072,23 @@ bpf_object__collect_prog_relos(struct bpf_object *obj, Elf64_Shdr *shdr, Elf_Dat
 			return -LIBBPF_ERRNO__FORMAT;
 		}
 
-		sym = elf_sym_by_idx(obj, ELF64_R_SYM(rel->r_info));
+		sym_idx = ELF64_R_SYM(rel->r_info);
+		sym = elf_sym_by_idx(obj, sym_idx);
 		if (!sym) {
-			pr_warn("sec '%s': symbol 0x%zx not found for relo #%d\n",
-				relo_sec_name, (size_t)ELF64_R_SYM(rel->r_info), i);
+			pr_warn("sec '%s': symbol #%zu not found for relo #%d\n",
+				relo_sec_name, sym_idx, i);
+			return -LIBBPF_ERRNO__FORMAT;
+		}
+
+		if (sym->st_shndx >= obj->efile.sec_cnt) {
+			pr_warn("sec '%s': corrupted symbol #%zu pointing to invalid section #%zu for relo #%d\n",
+				relo_sec_name, sym_idx, (size_t)sym->st_shndx, i);
 			return -LIBBPF_ERRNO__FORMAT;
 		}
 
 		if (rel->r_offset % BPF_INSN_SZ || rel->r_offset >= scn_data->d_size) {
 			pr_warn("sec '%s': invalid offset 0x%zx for relo #%d\n",
-				relo_sec_name, (size_t)ELF64_R_SYM(rel->r_info), i);
+				relo_sec_name, (size_t)rel->r_offset, i);
 			return -LIBBPF_ERRNO__FORMAT;
 		}
 
@@ -4265,30 +4292,20 @@ int bpf_map__resize(struct bpf_map *map, __u32 max_entries)
 static int
 bpf_object__probe_loading(struct bpf_object *obj)
 {
-	struct bpf_load_program_attr attr;
 	char *cp, errmsg[STRERR_BUFSIZE];
 	struct bpf_insn insns[] = {
 		BPF_MOV64_IMM(BPF_REG_0, 0),
 		BPF_EXIT_INSN(),
 	};
-	int ret;
+	int ret, insn_cnt = ARRAY_SIZE(insns);
 
 	if (obj->gen_loader)
 		return 0;
 
 	/* make sure basic loading works */
-
-	memset(&attr, 0, sizeof(attr));
-	attr.prog_type = BPF_PROG_TYPE_SOCKET_FILTER;
-	attr.insns = insns;
-	attr.insns_cnt = ARRAY_SIZE(insns);
-	attr.license = "GPL";
-
-	ret = bpf_load_program_xattr(&attr, NULL, 0);
-	if (ret < 0) {
-		attr.prog_type = BPF_PROG_TYPE_TRACEPOINT;
-		ret = bpf_load_program_xattr(&attr, NULL, 0);
-	}
+	ret = bpf_prog_load(BPF_PROG_TYPE_SOCKET_FILTER, NULL, "GPL", insns, insn_cnt, NULL);
+	if (ret < 0)
+		ret = bpf_prog_load(BPF_PROG_TYPE_TRACEPOINT, NULL, "GPL", insns, insn_cnt, NULL);
 	if (ret < 0) {
 		ret = errno;
 		cp = libbpf_strerror_r(ret, errmsg, sizeof(errmsg));
@@ -4312,28 +4329,19 @@ static int probe_fd(int fd)
 
 static int probe_kern_prog_name(void)
 {
-	struct bpf_load_program_attr attr;
 	struct bpf_insn insns[] = {
 		BPF_MOV64_IMM(BPF_REG_0, 0),
 		BPF_EXIT_INSN(),
 	};
-	int ret;
+	int ret, insn_cnt = ARRAY_SIZE(insns);
 
 	/* make sure loading with name works */
-
-	memset(&attr, 0, sizeof(attr));
-	attr.prog_type = BPF_PROG_TYPE_SOCKET_FILTER;
-	attr.insns = insns;
-	attr.insns_cnt = ARRAY_SIZE(insns);
-	attr.license = "GPL";
-	attr.name = "test";
-	ret = bpf_load_program_xattr(&attr, NULL, 0);
+	ret = bpf_prog_load(BPF_PROG_TYPE_SOCKET_FILTER, "test", "GPL", insns, insn_cnt, NULL);
 	return probe_fd(ret);
 }
 
 static int probe_kern_global_data(void)
 {
-	struct bpf_load_program_attr prg_attr;
 	struct bpf_create_map_attr map_attr;
 	char *cp, errmsg[STRERR_BUFSIZE];
 	struct bpf_insn insns[] = {
@@ -4342,7 +4350,7 @@ static int probe_kern_global_data(void)
 		BPF_MOV64_IMM(BPF_REG_0, 0),
 		BPF_EXIT_INSN(),
 	};
-	int ret, map;
+	int ret, map, insn_cnt = ARRAY_SIZE(insns);
 
 	memset(&map_attr, 0, sizeof(map_attr));
 	map_attr.map_type = BPF_MAP_TYPE_ARRAY;
@@ -4361,13 +4369,7 @@ static int probe_kern_global_data(void)
 
 	insns[0].imm = map;
 
-	memset(&prg_attr, 0, sizeof(prg_attr));
-	prg_attr.prog_type = BPF_PROG_TYPE_SOCKET_FILTER;
-	prg_attr.insns = insns;
-	prg_attr.insns_cnt = ARRAY_SIZE(insns);
-	prg_attr.license = "GPL";
-
-	ret = bpf_load_program_xattr(&prg_attr, NULL, 0);
+	ret = bpf_prog_load(BPF_PROG_TYPE_SOCKET_FILTER, NULL, "GPL", insns, insn_cnt, NULL);
 	close(map);
 	return probe_fd(ret);
 }
@@ -4468,6 +4470,22 @@ static int probe_kern_btf_decl_tag(void)
 					     strs, sizeof(strs)));
 }
 
+static int probe_kern_btf_type_tag(void)
+{
+	static const char strs[] = "\0tag";
+	__u32 types[] = {
+		/* int */
+		BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),		/* [1] */
+		/* attr */
+		BTF_TYPE_TYPE_TAG_ENC(1, 1),				/* [2] */
+		/* ptr */
+		BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 2),	/* [3] */
+	};
+
+	return probe_fd(libbpf__load_raw_btf((char *)types, sizeof(types),
+					     strs, sizeof(strs)));
+}
+
 static int probe_kern_array_mmap(void)
 {
 	struct bpf_create_map_attr attr = {
@@ -4483,30 +4501,24 @@ static int probe_kern_array_mmap(void)
 
 static int probe_kern_exp_attach_type(void)
 {
-	struct bpf_load_program_attr attr;
+	LIBBPF_OPTS(bpf_prog_load_opts, opts, .expected_attach_type = BPF_CGROUP_INET_SOCK_CREATE);
 	struct bpf_insn insns[] = {
 		BPF_MOV64_IMM(BPF_REG_0, 0),
 		BPF_EXIT_INSN(),
 	};
+	int fd, insn_cnt = ARRAY_SIZE(insns);
 
-	memset(&attr, 0, sizeof(attr));
 	/* use any valid combination of program type and (optional)
 	 * non-zero expected attach type (i.e., not a BPF_CGROUP_INET_INGRESS)
 	 * to see if kernel supports expected_attach_type field for
 	 * BPF_PROG_LOAD command
 	 */
-	attr.prog_type = BPF_PROG_TYPE_CGROUP_SOCK;
-	attr.expected_attach_type = BPF_CGROUP_INET_SOCK_CREATE;
-	attr.insns = insns;
-	attr.insns_cnt = ARRAY_SIZE(insns);
-	attr.license = "GPL";
-
-	return probe_fd(bpf_load_program_xattr(&attr, NULL, 0));
+	fd = bpf_prog_load(BPF_PROG_TYPE_CGROUP_SOCK, NULL, "GPL", insns, insn_cnt, &opts);
+	return probe_fd(fd);
 }
 
 static int probe_kern_probe_read_kernel(void)
 {
-	struct bpf_load_program_attr attr;
 	struct bpf_insn insns[] = {
 		BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),	/* r1 = r10 (fp) */
 		BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),	/* r1 += -8 */
@@ -4515,26 +4527,21 @@ static int probe_kern_probe_read_kernel(void)
 		BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_probe_read_kernel),
 		BPF_EXIT_INSN(),
 	};
+	int fd, insn_cnt = ARRAY_SIZE(insns);
 
-	memset(&attr, 0, sizeof(attr));
-	attr.prog_type = BPF_PROG_TYPE_KPROBE;
-	attr.insns = insns;
-	attr.insns_cnt = ARRAY_SIZE(insns);
-	attr.license = "GPL";
-
-	return probe_fd(bpf_load_program_xattr(&attr, NULL, 0));
+	fd = bpf_prog_load(BPF_PROG_TYPE_KPROBE, NULL, "GPL", insns, insn_cnt, NULL);
+	return probe_fd(fd);
 }
 
 static int probe_prog_bind_map(void)
 {
-	struct bpf_load_program_attr prg_attr;
 	struct bpf_create_map_attr map_attr;
 	char *cp, errmsg[STRERR_BUFSIZE];
 	struct bpf_insn insns[] = {
 		BPF_MOV64_IMM(BPF_REG_0, 0),
 		BPF_EXIT_INSN(),
 	};
-	int ret, map, prog;
+	int ret, map, prog, insn_cnt = ARRAY_SIZE(insns);
 
 	memset(&map_attr, 0, sizeof(map_attr));
 	map_attr.map_type = BPF_MAP_TYPE_ARRAY;
@@ -4551,13 +4558,7 @@ static int probe_prog_bind_map(void)
 		return ret;
 	}
 
-	memset(&prg_attr, 0, sizeof(prg_attr));
-	prg_attr.prog_type = BPF_PROG_TYPE_SOCKET_FILTER;
-	prg_attr.insns = insns;
-	prg_attr.insns_cnt = ARRAY_SIZE(insns);
-	prg_attr.license = "GPL";
-
-	prog = bpf_load_program_xattr(&prg_attr, NULL, 0);
+	prog = bpf_prog_load(BPF_PROG_TYPE_SOCKET_FILTER, NULL, "GPL", insns, insn_cnt, NULL);
 	if (prog < 0) {
 		close(map);
 		return 0;
@@ -4602,19 +4603,14 @@ static int probe_module_btf(void)
 
 static int probe_perf_link(void)
 {
-	struct bpf_load_program_attr attr;
 	struct bpf_insn insns[] = {
 		BPF_MOV64_IMM(BPF_REG_0, 0),
 		BPF_EXIT_INSN(),
 	};
 	int prog_fd, link_fd, err;
 
-	memset(&attr, 0, sizeof(attr));
-	attr.prog_type = BPF_PROG_TYPE_TRACEPOINT;
-	attr.insns = insns;
-	attr.insns_cnt = ARRAY_SIZE(insns);
-	attr.license = "GPL";
-	prog_fd = bpf_load_program_xattr(&attr, NULL, 0);
+	prog_fd = bpf_prog_load(BPF_PROG_TYPE_TRACEPOINT, NULL, "GPL",
+				insns, ARRAY_SIZE(insns), NULL);
 	if (prog_fd < 0)
 		return -errno;
 
@@ -4687,6 +4683,9 @@ static struct kern_feature_desc {
 	[FEAT_BTF_DECL_TAG] = {
 		"BTF_KIND_DECL_TAG support", probe_kern_btf_decl_tag,
 	},
+	[FEAT_BTF_TYPE_TAG] = {
+		"BTF_KIND_TYPE_TAG support", probe_kern_btf_type_tag,
+	},
 };
 
 static bool kernel_supports(const struct bpf_object *obj, enum kern_feature_id feat_id)
@@ -6374,16 +6373,16 @@ static int libbpf_find_attach_btf_id(struct bpf_program *prog, const char *attac
 
 /* this is called as prog->sec_def->preload_fn for libbpf-supported sec_defs */
 static int libbpf_preload_prog(struct bpf_program *prog,
-			       struct bpf_prog_load_params *attr, long cookie)
+			       struct bpf_prog_load_opts *opts, long cookie)
 {
 	enum sec_def_flags def = cookie;
 
 	/* old kernels might not support specifying expected_attach_type */
 	if ((def & SEC_EXP_ATTACH_OPT) && !kernel_supports(prog->obj, FEAT_EXP_ATTACH_TYPE))
-		attr->expected_attach_type = 0;
+		opts->expected_attach_type = 0;
 
 	if (def & SEC_SLEEPABLE)
-		attr->prog_flags |= BPF_F_SLEEPABLE;
+		opts->prog_flags |= BPF_F_SLEEPABLE;
 
 	if ((prog->type == BPF_PROG_TYPE_TRACING ||
 	     prog->type == BPF_PROG_TYPE_LSM ||
@@ -6402,21 +6401,22 @@ static int libbpf_preload_prog(struct bpf_program *prog,
 
 		/* but by now libbpf common logic is not utilizing
 		 * prog->atach_btf_obj_fd/prog->attach_btf_id anymore because
-		 * this callback is called after attrs were populated by
-		 * libbpf, so this callback has to update attr explicitly here
+		 * this callback is called after opts were populated by
+		 * libbpf, so this callback has to update opts explicitly here
 		 */
-		attr->attach_btf_obj_fd = btf_obj_fd;
-		attr->attach_btf_id = btf_type_id;
+		opts->attach_btf_obj_fd = btf_obj_fd;
+		opts->attach_btf_id = btf_type_id;
 	}
 	return 0;
 }
 
-static int
-load_program(struct bpf_program *prog, struct bpf_insn *insns, int insns_cnt,
-	     char *license, __u32 kern_version, int *pfd)
+static int bpf_object_load_prog_instance(struct bpf_object *obj, struct bpf_program *prog,
+					 struct bpf_insn *insns, int insns_cnt,
+					 const char *license, __u32 kern_version,
+					 int *prog_fd)
 {
-	struct bpf_prog_load_params load_attr = {};
-	struct bpf_object *obj = prog->obj;
+	LIBBPF_OPTS(bpf_prog_load_opts, load_attr);
+	const char *prog_name = NULL;
 	char *cp, errmsg[STRERR_BUFSIZE];
 	size_t log_buf_size = 0;
 	char *log_buf = NULL;
@@ -6435,13 +6435,9 @@ load_program(struct bpf_program *prog, struct bpf_insn *insns, int insns_cnt,
 	if (!insns || !insns_cnt)
 		return -EINVAL;
 
-	load_attr.prog_type = prog->type;
 	load_attr.expected_attach_type = prog->expected_attach_type;
 	if (kernel_supports(obj, FEAT_PROG_NAME))
-		load_attr.name = prog->name;
-	load_attr.insns = insns;
-	load_attr.insn_cnt = insns_cnt;
-	load_attr.license = license;
+		prog_name = prog->name;
 	load_attr.attach_btf_id = prog->attach_btf_id;
 	load_attr.attach_prog_fd = prog->attach_prog_fd;
 	load_attr.attach_btf_obj_fd = prog->attach_btf_obj_fd;
@@ -6475,9 +6471,10 @@ load_program(struct bpf_program *prog, struct bpf_insn *insns, int insns_cnt,
 	}
 
 	if (obj->gen_loader) {
-		bpf_gen__prog_load(obj->gen_loader, &load_attr,
+		bpf_gen__prog_load(obj->gen_loader, prog->type, prog->name,
+				   license, insns, insns_cnt, &load_attr,
 				   prog - obj->programs);
-		*pfd = -1;
+		*prog_fd = -1;
 		return 0;
 	}
 retry_load:
@@ -6490,8 +6487,8 @@ retry_load:
 	}
 
 	load_attr.log_buf = log_buf;
-	load_attr.log_buf_sz = log_buf_size;
-	ret = libbpf__bpf_prog_load(&load_attr);
+	load_attr.log_size = log_buf_size;
+	ret = bpf_prog_load(prog->type, prog_name, license, insns, insns_cnt, &load_attr);
 
 	if (ret >= 0) {
 		if (log_buf && load_attr.log_level)
@@ -6515,7 +6512,7 @@ retry_load:
 			}
 		}
 
-		*pfd = ret;
+		*prog_fd = ret;
 		ret = 0;
 		goto out;
 	}
@@ -6537,19 +6534,19 @@ retry_load:
 		pr_warn("-- BEGIN DUMP LOG ---\n");
 		pr_warn("\n%s\n", log_buf);
 		pr_warn("-- END LOG --\n");
-	} else if (load_attr.insn_cnt >= BPF_MAXINSNS) {
-		pr_warn("Program too large (%zu insns), at most %d insns\n",
-			load_attr.insn_cnt, BPF_MAXINSNS);
+	} else if (insns_cnt >= BPF_MAXINSNS) {
+		pr_warn("Program too large (%d insns), at most %d insns\n",
+			insns_cnt, BPF_MAXINSNS);
 		ret = -LIBBPF_ERRNO__PROG2BIG;
-	} else if (load_attr.prog_type != BPF_PROG_TYPE_KPROBE) {
+	} else if (prog->type != BPF_PROG_TYPE_KPROBE) {
 		/* Wrong program type? */
 		int fd;
 
-		load_attr.prog_type = BPF_PROG_TYPE_KPROBE;
 		load_attr.expected_attach_type = 0;
 		load_attr.log_buf = NULL;
-		load_attr.log_buf_sz = 0;
-		fd = libbpf__bpf_prog_load(&load_attr);
+		load_attr.log_size = 0;
+		fd = bpf_prog_load(BPF_PROG_TYPE_KPROBE, prog_name, license,
+				   insns, insns_cnt, &load_attr);
 		if (fd >= 0) {
 			close(fd);
 			ret = -LIBBPF_ERRNO__PROGTYPE;
@@ -6591,11 +6588,12 @@ static int bpf_program__record_externs(struct bpf_program *prog)
 	return 0;
 }
 
-int bpf_program__load(struct bpf_program *prog, char *license, __u32 kern_ver)
+static int bpf_object_load_prog(struct bpf_object *obj, struct bpf_program *prog,
+				const char *license, __u32 kern_ver)
 {
 	int err = 0, fd, i;
 
-	if (prog->obj->loaded) {
+	if (obj->loaded) {
 		pr_warn("prog '%s': can't load after object was loaded\n", prog->name);
 		return libbpf_err(-EINVAL);
 	}
@@ -6621,10 +6619,11 @@ int bpf_program__load(struct bpf_program *prog, char *license, __u32 kern_ver)
 			pr_warn("prog '%s': inconsistent nr(%d) != 1\n",
 				prog->name, prog->instances.nr);
 		}
-		if (prog->obj->gen_loader)
+		if (obj->gen_loader)
 			bpf_program__record_externs(prog);
-		err = load_program(prog, prog->insns, prog->insns_cnt,
-				   license, kern_ver, &fd);
+		err = bpf_object_load_prog_instance(obj, prog,
+						    prog->insns, prog->insns_cnt,
+						    license, kern_ver, &fd);
 		if (!err)
 			prog->instances.fds[0] = fd;
 		goto out;
@@ -6652,8 +6651,9 @@ int bpf_program__load(struct bpf_program *prog, char *license, __u32 kern_ver)
 			continue;
 		}
 
-		err = load_program(prog, result.new_insn_ptr,
-				   result.new_insn_cnt, license, kern_ver, &fd);
+		err = bpf_object_load_prog_instance(obj, prog,
+						    result.new_insn_ptr, result.new_insn_cnt,
+						    license, kern_ver, &fd);
 		if (err) {
 			pr_warn("Loading the %dth instance of program '%s' failed\n",
 				i, prog->name);
@@ -6670,6 +6670,11 @@ out:
 	return libbpf_err(err);
 }
 
+int bpf_program__load(struct bpf_program *prog, const char *license, __u32 kern_ver)
+{
+	return bpf_object_load_prog(prog->obj, prog, license, kern_ver);
+}
+
 static int
 bpf_object__load_progs(struct bpf_object *obj, int log_level)
 {
@@ -6693,7 +6698,7 @@ bpf_object__load_progs(struct bpf_object *obj, int log_level)
 			continue;
 		}
 		prog->log_level |= log_level;
-		err = bpf_program__load(prog, obj->license, obj->kern_version);
+		err = bpf_object_load_prog(obj, prog, obj->license, obj->kern_version);
 		if (err)
 			return err;
 	}
@@ -7733,7 +7738,7 @@ int bpf_object__pin_maps(struct bpf_object *obj, const char *path)
 	return 0;
 
 err_unpin_maps:
-	while ((map = bpf_map__prev(map, obj))) {
+	while ((map = bpf_object__prev_map(obj, map))) {
 		if (!map->pin_path)
 			continue;
 
@@ -7813,7 +7818,7 @@ int bpf_object__pin_programs(struct bpf_object *obj, const char *path)
 	return 0;
 
 err_unpin_programs:
-	while ((prog = bpf_program__prev(prog, obj))) {
+	while ((prog = bpf_object__prev_program(obj, prog))) {
 		char buf[PATH_MAX];
 		int len;
 
@@ -8154,9 +8159,11 @@ int bpf_program__set_autoload(struct bpf_program *prog, bool autoload)
 	return 0;
 }
 
+static int bpf_program_nth_fd(const struct bpf_program *prog, int n);
+
 int bpf_program__fd(const struct bpf_program *prog)
 {
-	return bpf_program__nth_fd(prog, 0);
+	return bpf_program_nth_fd(prog, 0);
 }
 
 size_t bpf_program__size(const struct bpf_program *prog)
@@ -8202,7 +8209,10 @@ int bpf_program__set_prep(struct bpf_program *prog, int nr_instances,
 	return 0;
 }
 
-int bpf_program__nth_fd(const struct bpf_program *prog, int n)
+__attribute__((alias("bpf_program_nth_fd")))
+int bpf_program__nth_fd(const struct bpf_program *prog, int n);
+
+static int bpf_program_nth_fd(const struct bpf_program *prog, int n)
 {
 	int fd;
 
@@ -8281,6 +8291,20 @@ void bpf_program__set_expected_attach_type(struct bpf_program *prog,
 	prog->expected_attach_type = type;
 }
 
+__u32 bpf_program__flags(const struct bpf_program *prog)
+{
+	return prog->prog_flags;
+}
+
+int bpf_program__set_extra_flags(struct bpf_program *prog, __u32 extra_flags)
+{
+	if (prog->obj->loaded)
+		return libbpf_err(-EBUSY);
+
+	prog->prog_flags |= extra_flags;
+	return 0;
+}
+
 #define SEC_DEF(sec_pfx, ptype, atype, flags, ...) {			    \
 	.sec = sec_pfx,							    \
 	.prog_type = BPF_PROG_TYPE_##ptype,				    \
@@ -9028,7 +9052,10 @@ int bpf_map__set_inner_map_fd(struct bpf_map *map, int fd)
 		pr_warn("error: inner_map_fd already specified\n");
 		return libbpf_err(-EINVAL);
 	}
-	zfree(&map->inner_map);
+	if (map->inner_map) {
+		bpf_map__destroy(map->inner_map);
+		zfree(&map->inner_map);
+	}
 	map->inner_map_fd = fd;
 	return 0;
 }
@@ -9145,21 +9172,12 @@ long libbpf_get_error(const void *ptr)
 	return -errno;
 }
 
-int bpf_prog_load(const char *file, enum bpf_prog_type type,
-		  struct bpf_object **pobj, int *prog_fd)
-{
-	struct bpf_prog_load_attr attr;
-
-	memset(&attr, 0, sizeof(struct bpf_prog_load_attr));
-	attr.file = file;
-	attr.prog_type = type;
-	attr.expected_attach_type = 0;
-
-	return bpf_prog_load_xattr(&attr, pobj, prog_fd);
-}
-
+__attribute__((alias("bpf_prog_load_xattr2")))
 int bpf_prog_load_xattr(const struct bpf_prog_load_attr *attr,
-			struct bpf_object **pobj, int *prog_fd)
+			struct bpf_object **pobj, int *prog_fd);
+
+static int bpf_prog_load_xattr2(const struct bpf_prog_load_attr *attr,
+				struct bpf_object **pobj, int *prog_fd)
 {
 	struct bpf_object_open_attr open_attr = {};
 	struct bpf_program *prog, *first_prog = NULL;
@@ -9230,6 +9248,20 @@ int bpf_prog_load_xattr(const struct bpf_prog_load_attr *attr,
 	return 0;
 }
 
+COMPAT_VERSION(bpf_prog_load_deprecated, bpf_prog_load, LIBBPF_0.0.1)
+int bpf_prog_load_deprecated(const char *file, enum bpf_prog_type type,
+			     struct bpf_object **pobj, int *prog_fd)
+{
+	struct bpf_prog_load_attr attr;
+
+	memset(&attr, 0, sizeof(struct bpf_prog_load_attr));
+	attr.file = file;
+	attr.prog_type = type;
+	attr.expected_attach_type = 0;
+
+	return bpf_prog_load_xattr2(&attr, pobj, prog_fd);
+}
+
 struct bpf_link {
 	int (*detach)(struct bpf_link *link);
 	void (*dealloc)(struct bpf_link *link);
@@ -10575,11 +10607,18 @@ error:
 static struct perf_buffer *__perf_buffer__new(int map_fd, size_t page_cnt,
 					      struct perf_buffer_params *p);
 
-struct perf_buffer *perf_buffer__new(int map_fd, size_t page_cnt,
-				     const struct perf_buffer_opts *opts)
+DEFAULT_VERSION(perf_buffer__new_v0_6_0, perf_buffer__new, LIBBPF_0.6.0)
+struct perf_buffer *perf_buffer__new_v0_6_0(int map_fd, size_t page_cnt,
+					    perf_buffer_sample_fn sample_cb,
+					    perf_buffer_lost_fn lost_cb,
+					    void *ctx,
+					    const struct perf_buffer_opts *opts)
 {
 	struct perf_buffer_params p = {};
-	struct perf_event_attr attr = { 0, };
+	struct perf_event_attr attr = {};
+
+	if (!OPTS_VALID(opts, perf_buffer_opts))
+		return libbpf_err_ptr(-EINVAL);
 
 	attr.config = PERF_COUNT_SW_BPF_OUTPUT;
 	attr.type = PERF_TYPE_SOFTWARE;
@@ -10588,29 +10627,62 @@ struct perf_buffer *perf_buffer__new(int map_fd, size_t page_cnt,
 	attr.wakeup_events = 1;
 
 	p.attr = &attr;
-	p.sample_cb = opts ? opts->sample_cb : NULL;
-	p.lost_cb = opts ? opts->lost_cb : NULL;
-	p.ctx = opts ? opts->ctx : NULL;
+	p.sample_cb = sample_cb;
+	p.lost_cb = lost_cb;
+	p.ctx = ctx;
 
 	return libbpf_ptr(__perf_buffer__new(map_fd, page_cnt, &p));
 }
 
-struct perf_buffer *
-perf_buffer__new_raw(int map_fd, size_t page_cnt,
-		     const struct perf_buffer_raw_opts *opts)
+COMPAT_VERSION(perf_buffer__new_deprecated, perf_buffer__new, LIBBPF_0.0.4)
+struct perf_buffer *perf_buffer__new_deprecated(int map_fd, size_t page_cnt,
+						const struct perf_buffer_opts *opts)
+{
+	return perf_buffer__new_v0_6_0(map_fd, page_cnt,
+				       opts ? opts->sample_cb : NULL,
+				       opts ? opts->lost_cb : NULL,
+				       opts ? opts->ctx : NULL,
+				       NULL);
+}
+
+DEFAULT_VERSION(perf_buffer__new_raw_v0_6_0, perf_buffer__new_raw, LIBBPF_0.6.0)
+struct perf_buffer *perf_buffer__new_raw_v0_6_0(int map_fd, size_t page_cnt,
+						struct perf_event_attr *attr,
+						perf_buffer_event_fn event_cb, void *ctx,
+						const struct perf_buffer_raw_opts *opts)
 {
 	struct perf_buffer_params p = {};
 
-	p.attr = opts->attr;
-	p.event_cb = opts->event_cb;
-	p.ctx = opts->ctx;
-	p.cpu_cnt = opts->cpu_cnt;
-	p.cpus = opts->cpus;
-	p.map_keys = opts->map_keys;
+	if (page_cnt == 0 || !attr)
+		return libbpf_err_ptr(-EINVAL);
+
+	if (!OPTS_VALID(opts, perf_buffer_raw_opts))
+		return libbpf_err_ptr(-EINVAL);
+
+	p.attr = attr;
+	p.event_cb = event_cb;
+	p.ctx = ctx;
+	p.cpu_cnt = OPTS_GET(opts, cpu_cnt, 0);
+	p.cpus = OPTS_GET(opts, cpus, NULL);
+	p.map_keys = OPTS_GET(opts, map_keys, NULL);
 
 	return libbpf_ptr(__perf_buffer__new(map_fd, page_cnt, &p));
 }
 
+COMPAT_VERSION(perf_buffer__new_raw_deprecated, perf_buffer__new_raw, LIBBPF_0.0.4)
+struct perf_buffer *perf_buffer__new_raw_deprecated(int map_fd, size_t page_cnt,
+						    const struct perf_buffer_raw_opts *opts)
+{
+	LIBBPF_OPTS(perf_buffer_raw_opts, inner_opts,
+		.cpu_cnt = opts->cpu_cnt,
+		.cpus = opts->cpus,
+		.map_keys = opts->map_keys,
+	);
+
+	return perf_buffer__new_raw_v0_6_0(map_fd, page_cnt, opts->attr,
+					   opts->event_cb, opts->ctx, &inner_opts);
+}
+
 static struct perf_buffer *__perf_buffer__new(int map_fd, size_t page_cnt,
 					      struct perf_buffer_params *p)
 {