Apply patch to run binaries on Debian 10

2026-03-16 22:39:06 +08:00 · 2024-01-24 12:45:57 +00:00
45 changed files with 83966 additions and 86172 deletions
--- a/.github/actions/build-selftests/prepare_selftests-4.9.0.sh
+++ b/.github/actions/build-selftests/prepare_selftests-4.9.0.sh
@@ -1,5 +1,3 @@
 #!/bin/bash

 printf "all:\n\ttouch bpf_testmod.ko\n\nclean:\n" > bpf_testmod/Makefile
-printf "all:\n\ttouch bpf_test_no_cfi.ko\n\nclean:\n" > bpf_test_no_cfi/Makefile
-
--- a/.github/actions/build-selftests/prepare_selftests-5.5.0.sh
+++ b/.github/actions/build-selftests/prepare_selftests-5.5.0.sh
@@ -1,5 +1,3 @@
 #!/bin/bash

 printf "all:\n\ttouch bpf_testmod.ko\n\nclean:\n" > bpf_testmod/Makefile
-printf "all:\n\ttouch bpf_test_no_cfi.ko\n\nclean:\n" > bpf_test_no_cfi/Makefile
-
--- a/.github/actions/build-selftests/vmlinux.h
+++ b/.github/actions/build-selftests/vmlinux.h
--- a/.github/actions/vmtest/action.yml
+++ b/.github/actions/vmtest/action.yml
@@ -37,7 +37,6 @@ runs:
      uses: libbpf/ci/setup-build-env@main
      with:
        pahole: ${{ inputs.pahole }}
-        arch: ${{ inputs.arch }}
    # 1. download CHECKPOINT kernel source
    - name: Get checkpoint commit
      shell: bash
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -42,7 +42,7 @@ jobs:
          - name: gcc-12
            target: RUN_GCC12
    steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v3
        name: Checkout
      - uses: ./.github/actions/setup
        name: Setup
@@ -63,14 +63,14 @@ jobs:
          - arch: s390x
          - arch: x86
    steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v3
        name: Checkout
      - uses: ./.github/actions/setup
        name: Pre-Setup
      - run: source /tmp/ci_setup && sudo -E $CI_ROOT/managers/ubuntu.sh
        if: matrix.arch == 'x86'
        name: Setup
-      - uses: uraimo/run-on-arch-action@v2.7.1
+      - uses: uraimo/run-on-arch-action@v2.0.5
        name: Build in docker
        if: matrix.arch != 'x86'
        with:
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -32,7 +32,7 @@ jobs:

    steps:
      - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3

      - name: Initialize CodeQL
        uses: github/codeql-action/init@v2
--- a/.github/workflows/coverity.yml
+++ b/.github/workflows/coverity.yml
@@ -11,7 +11,7 @@ jobs:
    if: github.repository == 'libbpf/libbpf'
    name: Coverity
    steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v3
      - uses: ./.github/actions/setup
      - name: Run coverity
        run: |
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -12,7 +12,7 @@ jobs:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
      - name: Run ShellCheck
        uses: ludeeus/action-shellcheck@master
        env:
--- a/.github/workflows/ondemand.yml
+++ b/.github/workflows/ondemand.yml
@@ -25,7 +25,7 @@ jobs:
    runs-on: ubuntu-latest
    name: vmtest with customized pahole/Kernel
    steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v3
      - uses: ./.github/actions/setup
      - uses: ./.github/actions/vmtest
        with:
--- a/.github/workflows/pahole.yml
+++ b/.github/workflows/pahole.yml
@@ -12,7 +12,7 @@ jobs:
    env:
      STAGING: tmp.master
    steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v3
      - uses: ./.github/actions/setup
      - uses: ./.github/actions/vmtest
        with:
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -31,7 +31,7 @@ jobs:
            runs_on: s390x
            arch: 's390x'
    steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v3
        name: Checkout
      - uses: ./.github/actions/setup
        name: Setup
--- a/2
+++ b/2
@@ -1 +1 @@
-443574b033876c85a35de4c65c14f7fe092222b2
+7c5e046bdcb2513f9decb3765d8bf92d604279cf
--- a/2
+++ b/2
@@ -1 +1 @@
-14bb1e8c8d4ad5d9d2febb7d19c70a3cf536e1e5
+98e20e5e13d2811898921f999288be7151a11954
--- a/README.md
+++ b/README.md
@@ -146,7 +146,7 @@ Distributions packaging libbpf from this mirror:
  - [Gentoo](https://packages.gentoo.org/packages/dev-libs/libbpf)
  - [Debian](https://packages.debian.org/source/sid/libbpf)
  - [Arch](https://archlinux.org/packages/core/x86_64/libbpf/)
-  - [Ubuntu](https://packages.ubuntu.com/source/jammy/libbpf)
+  - [Ubuntu](https://packages.ubuntu.com/source/impish/libbpf)
  - [Alpine](https://pkgs.alpinelinux.org/packages?name=libbpf)

 Benefits of packaging from the mirror over packaging from kernel sources:
--- a/ci/diffs/0001-bpf-patch-out-BPF_F_TEST_REG_INVARIANTS-for-old-kern.patch
+++ b/ci/diffs/0001-bpf-patch-out-BPF_F_TEST_REG_INVARIANTS-for-old-kern.patch
@@ -0,0 +1,29 @@
+From 61e8893a1e32ab57d15974427f41b75de608dbda Mon Sep 17 00:00:00 2001
+From: Andrii Nakryiko <andrii@kernel.org>
+Date: Mon, 4 Dec 2023 21:21:23 -0800
+Subject: [PATCH] bpf: patch out BPF_F_TEST_REG_INVARIANTS for old kernels
+
+CI-only patch to avoid setting BPF_F_TEST_REG_INVARIANTS flag for old
+kernels that don't support it.
+
+Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
+---
+ tools/include/uapi/linux/bpf.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
+index e88746ba7d21..8344c9ce60e0 100644
+--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
+@@ -1201,7 +1201,7 @@ enum bpf_perf_event_type {
+ #define BPF_F_XDP_DEV_BOUND_ONLY	(1U << 6)
+ 
+ /* The verifier internal test flag. Behavior is undefined */
+-#define BPF_F_TEST_REG_INVARIANTS	(1U << 7)
+#define BPF_F_TEST_REG_INVARIANTS	(0)
+ 
+ /* link_create.kprobe_multi.flags used in LINK_CREATE command for
+  * BPF_TRACE_KPROBE_MULTI attach type to create return probe.
+-- 
+2.34.1
+
--- a/ci/diffs/0001-selftests-bpf-xskxceiver-ksft_print_msg-fix-format-t.patch
+++ b/ci/diffs/0001-selftests-bpf-xskxceiver-ksft_print_msg-fix-format-t.patch
@@ -0,0 +1,89 @@
+From fe69a1b1b6ed9ffc2c578c63f526026a8ab74f0c Mon Sep 17 00:00:00 2001
+From: Anders Roxell <anders.roxell@linaro.org>
+Date: Thu, 9 Nov 2023 18:43:28 +0100
+Subject: [PATCH] selftests: bpf: xskxceiver: ksft_print_msg: fix format type
+ error
+
+Crossbuilding selftests/bpf for architecture arm64, format specifies
+type error show up like.
+
+xskxceiver.c:912:34: error: format specifies type 'int' but the argument
+has type '__u64' (aka 'unsigned long long') [-Werror,-Wformat]
+ ksft_print_msg("[%s] expected meta_count [%d], got meta_count [%d]\n",
+                                                                ~~
+                                                                %llu
+                __func__, pkt->pkt_nb, meta->count);
+                                       ^~~~~~~~~~~
+xskxceiver.c:929:55: error: format specifies type 'unsigned long long' but
+ the argument has type 'u64' (aka 'unsigned long') [-Werror,-Wformat]
+ ksft_print_msg("Frag invalid addr: %llx len: %u\n", addr, len);
+                                    ~~~~             ^~~~
+
+Fixing the issues by casting to (unsigned long long) and changing the
+specifiers to be %llu from %d and %u, since with u64s it might be %llx
+or %lx, depending on architecture.
+
+Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
+Link: https://lore.kernel.org/r/20231109174328.1774571-1-anders.roxell@linaro.org
+Signed-off-by: Alexei Starovoitov <ast@kernel.org>
+---
+ tools/testing/selftests/bpf/xskxceiver.c | 19 ++++++++++++-------
+ 1 file changed, 12 insertions(+), 7 deletions(-)
+
+diff --git a/tools/testing/selftests/bpf/xskxceiver.c b/tools/testing/selftests/bpf/xskxceiver.c
+index 591ca9637b23..b604c570309a 100644
+--- a/tools/testing/selftests/bpf/xskxceiver.c
+++ b/tools/testing/selftests/bpf/xskxceiver.c
+@@ -908,8 +908,9 @@ static bool is_metadata_correct(struct pkt *pkt, void *buffer, u64 addr)
+ 	struct xdp_info *meta = data - sizeof(struct xdp_info);
+ 
+ 	if (meta->count != pkt->pkt_nb) {
+-		ksft_print_msg("[%s] expected meta_count [%d], got meta_count [%d]\n",
+-			       __func__, pkt->pkt_nb, meta->count);
+		ksft_print_msg("[%s] expected meta_count [%d], got meta_count [%llu]\n",
+			       __func__, pkt->pkt_nb,
+			       (unsigned long long)meta->count);
+ 		return false;
+ 	}
+ 
+@@ -926,11 +927,13 @@ static bool is_frag_valid(struct xsk_umem_info *umem, u64 addr, u32 len, u32 exp
+ 
+ 	if (addr >= umem->num_frames * umem->frame_size ||
+ 	    addr + len > umem->num_frames * umem->frame_size) {
+-		ksft_print_msg("Frag invalid addr: %llx len: %u\n", addr, len);
+		ksft_print_msg("Frag invalid addr: %llx len: %u\n",
+			       (unsigned long long)addr, len);
+ 		return false;
+ 	}
+ 	if (!umem->unaligned_mode && addr % umem->frame_size + len > umem->frame_size) {
+-		ksft_print_msg("Frag crosses frame boundary addr: %llx len: %u\n", addr, len);
+		ksft_print_msg("Frag crosses frame boundary addr: %llx len: %u\n",
+			       (unsigned long long)addr, len);
+ 		return false;
+ 	}
+ 
+@@ -1029,7 +1032,8 @@ static int complete_pkts(struct xsk_socket_info *xsk, int batch_size)
+ 			u64 addr = *xsk_ring_cons__comp_addr(&xsk->umem->cq, idx + rcvd - 1);
+ 
+ 			ksft_print_msg("[%s] Too many packets completed\n", __func__);
+-			ksft_print_msg("Last completion address: %llx\n", addr);
+			ksft_print_msg("Last completion address: %llx\n",
+				       (unsigned long long)addr);
+ 			return TEST_FAILURE;
+ 		}
+ 
+@@ -1513,8 +1517,9 @@ static int validate_tx_invalid_descs(struct ifobject *ifobject)
+ 	}
+ 
+ 	if (stats.tx_invalid_descs != ifobject->xsk->pkt_stream->nb_pkts / 2) {
+-		ksft_print_msg("[%s] tx_invalid_descs incorrect. Got [%u] expected [%u]\n",
+-			       __func__, stats.tx_invalid_descs,
+		ksft_print_msg("[%s] tx_invalid_descs incorrect. Got [%llu] expected [%u]\n",
+			       __func__,
+			       (unsigned long long)stats.tx_invalid_descs,
+ 			       ifobject->xsk->pkt_stream->nb_pkts);
+ 		return TEST_FAILURE;
+ 	}
+-- 
+2.34.1
+
--- a/ci/diffs/0002-xdp-bonding-Fix-feature-flags-when-there-are-no-slav.patch
+++ b/ci/diffs/0002-xdp-bonding-Fix-feature-flags-when-there-are-no-slav.patch
@@ -1,56 +0,0 @@
-From f267f262815033452195f46c43b572159262f533 Mon Sep 17 00:00:00 2001
-From: Daniel Borkmann <daniel@iogearbox.net>
-Date: Tue, 5 Mar 2024 10:08:28 +0100
-Subject: [PATCH 2/2] xdp, bonding: Fix feature flags when there are no slave
- devs anymore
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-Commit 9b0ed890ac2a ("bonding: do not report NETDEV_XDP_ACT_XSK_ZEROCOPY")
-changed the driver from reporting everything as supported before a device
-was bonded into having the driver report that no XDP feature is supported
-until a real device is bonded as it seems to be more truthful given
-eventually real underlying devices decide what XDP features are supported.
-
-The change however did not take into account when all slave devices get
-removed from the bond device. In this case after 9b0ed890ac2a, the driver
-keeps reporting a feature mask of 0x77, that is, NETDEV_XDP_ACT_MASK &
-~NETDEV_XDP_ACT_XSK_ZEROCOPY whereas it should have reported a feature
-mask of 0.
-
-Fix it by resetting XDP feature flags in the same way as if no XDP program
-is attached to the bond device. This was uncovered by the XDP bond selftest
-which let BPF CI fail. After adjusting the starting masks on the latter
-to 0 instead of NETDEV_XDP_ACT_MASK the test passes again together with
-this fix.
-
-Fixes: 9b0ed890ac2a ("bonding: do not report NETDEV_XDP_ACT_XSK_ZEROCOPY")
-Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
-Cc: Magnus Karlsson <magnus.karlsson@intel.com>
-Cc: Prashant Batra <prbatra.mail@gmail.com>
-Cc: Toke Høiland-Jørgensen <toke@redhat.com>
-Cc: Jakub Kicinski <kuba@kernel.org>
-Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
-Message-ID: <20240305090829.17131-1-daniel@iogearbox.net>
-Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---
- drivers/net/bonding/bond_main.c | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
-index a11748b8d69b..cd0683bcca03 100644
--- a/drivers/net/bonding/bond_main.c
-+++ b/drivers/net/bonding/bond_main.c
-@@ -1811,7 +1811,7 @@ void bond_xdp_set_features(struct net_device *bond_dev)
- 
- 	ASSERT_RTNL();
- 
-	if (!bond_xdp_check(bond)) {
-+	if (!bond_xdp_check(bond) || !bond_has_slaves(bond)) {
- 		xdp_clear_features_flag(bond_dev);
- 		return;
- 	}
-- 
-2.43.0
-
--- a/ci/vmtest/configs/ALLOWLIST-5.5.0
+++ b/ci/vmtest/configs/ALLOWLIST-5.5.0
@@ -42,7 +42,6 @@ task_fd_query_tp
 tc_bpf
 tcp_estats
 tcp_rtt
-test_global_funcs/arg_tag_ctx*
 tp_attach_query
 usdt/urand_pid_attach
 xdp
--- a/ci/vmtest/configs/DENYLIST
+++ b/ci/vmtest/configs/DENYLIST
@@ -1,14 +0,0 @@
-# TEMPORARY
-btf_dump/btf_dump: syntax
-kprobe_multi_bench_attach
-core_reloc/enum64val
-core_reloc/size___diff_sz
-core_reloc/type_based___diff_sz
-test_ima	# All of CI is broken on it following 6.3-rc1 merge
-
-lwt_reroute      # crashes kernel after netnext merge from 2ab1efad60ad "net/sched: cls_api: complement tcf_tfilter_dump_policy"
-tc_links_ingress # started failing after net-next merge from 2ab1efad60ad "net/sched: cls_api: complement tcf_tfilter_dump_policy"
-xdp_bonding/xdp_bonding_features     # started failing after net merge from 359e54a93ab4 "l2tp: pass correct message length to ip6_append_data"
-tc_redirect/tc_redirect_dtime # uapi breakage after net-next commit 885c36e59f46 ("net: Re-use and set mono_delivery_time bit for userspace tstamp packets")
-migrate_reuseport/IPv4 TCP_NEW_SYN_RECV reqsk_timer_handler # flaky, under investigation
-migrate_reuseport/IPv6 TCP_NEW_SYN_RECV reqsk_timer_handler # flaky, under investigation
--- a/ci/vmtest/configs/DENYLIST-latest
+++ b/ci/vmtest/configs/DENYLIST-latest
@@ -10,4 +10,3 @@ send_signal/send_signal_nmi_thread

 lwt_reroute # crashes kernel, fix pending upstream
 tc_links_ingress # fails, same fix is pending upstream
-tc_redirect		  # enough is enough, banned for life for flakiness
--- a/ci/vmtest/configs/DENYLIST-latest.s390x
+++ b/ci/vmtest/configs/DENYLIST-latest.s390x
@@ -2,16 +2,3 @@
 sockmap_listen/sockhash VSOCK test_vsock_redir
 usdt/basic                               # failing verifier due to bounds check after LLVM update
 usdt/multispec                           # same as above
-
-deny_namespace                           # not yet in bpf denylist
-tc_redirect/tc_redirect_dtime            # very flaky
-lru_bug                                  # not yet in bpf-next denylist
-
-# Disabled temporarily for a crash.
-# https://lore.kernel.org/bpf/c9923c1d-971d-4022-8dc8-1364e929d34c@gmail.com/
-dummy_st_ops/dummy_init_ptr_arg
-fexit_bpf2bpf
-tailcalls
-trace_ext
-xdp_bpf2bpf
-xdp_metadata
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -37,14 +37,6 @@
 		.off   = 0,					\
 		.imm   = IMM })

-#define BPF_CALL_REL(DST)					\
-	((struct bpf_insn) {					\
-		.code = BPF_JMP | BPF_CALL,			\
-		.dst_reg = 0,					\
-		.src_reg = BPF_PSEUDO_CALL,			\
-		.off = 0,					\
-		.imm = DST })
-
 #define BPF_EXIT_INSN()						\
 	((struct bpf_insn) {					\
 		.code  = BPF_JMP | BPF_EXIT,			\
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -3,8 +3,6 @@
 #ifndef __LINUX_KERNEL_H
 #define __LINUX_KERNEL_H

-#include <linux/compiler.h>
-
 #ifndef offsetof
 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
 #endif
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -42,7 +42,6 @@
 #define BPF_JSGE	0x70	/* SGE is signed '>=', GE in x86 */
 #define BPF_JSLT	0xc0	/* SLT is signed, '<' */
 #define BPF_JSLE	0xd0	/* SLE is signed, '<=' */
-#define BPF_JCOND	0xe0	/* conditional pseudo jumps: may_goto, goto_or_nop */
 #define BPF_CALL	0x80	/* function call */
 #define BPF_EXIT	0x90	/* function return */

@@ -51,10 +50,6 @@
 #define BPF_XCHG	(0xe0 | BPF_FETCH)	/* atomic exchange */
 #define BPF_CMPXCHG	(0xf0 | BPF_FETCH)	/* atomic compare-and-write */

-enum bpf_cond_pseudo_jmp {
-	BPF_MAY_GOTO = 0,
-};
-
 /* Register numbers */
 enum {
 	BPF_REG_0 = 0,
@@ -82,29 +77,12 @@ struct bpf_insn {
 	__s32	imm;		/* signed immediate constant */
 };

-/* Deprecated: use struct bpf_lpm_trie_key_u8 (when the "data" member is needed for
- * byte access) or struct bpf_lpm_trie_key_hdr (when using an alternative type for
- * the trailing flexible array member) instead.
- */
+/* Key of an a BPF_MAP_TYPE_LPM_TRIE entry */
 struct bpf_lpm_trie_key {
 	__u32	prefixlen;	/* up to 32 for AF_INET, 128 for AF_INET6 */
 	__u8	data[0];	/* Arbitrary size */
 };

-/* Header for bpf_lpm_trie_key structs */
-struct bpf_lpm_trie_key_hdr {
-	__u32	prefixlen;
-};
-
-/* Key of an a BPF_MAP_TYPE_LPM_TRIE entry, with trailing byte array. */
-struct bpf_lpm_trie_key_u8 {
-	union {
-		struct bpf_lpm_trie_key_hdr	hdr;
-		__u32				prefixlen;
-	};
-	__u8	data[];		/* Arbitrary size */
-};
-
 struct bpf_cgroup_storage_key {
 	__u64	cgroup_inode_id;	/* cgroup inode id */
 	__u32	attach_type;		/* program attach type (enum bpf_attach_type) */
@@ -639,11 +617,7 @@ union bpf_iter_link_info {
 *		to NULL to begin the batched operation. After each subsequent
 *		**BPF_MAP_LOOKUP_BATCH**, the caller should pass the resultant
 *		*out_batch* as the *in_batch* for the next operation to
- *		continue iteration from the current point. Both *in_batch* and
- *		*out_batch* must point to memory large enough to hold a key,
- *		except for maps of type **BPF_MAP_TYPE_{HASH, PERCPU_HASH,
- *		LRU_HASH, LRU_PERCPU_HASH}**, for which batch parameters
- *		must be at least 4 bytes wide regardless of key size.
+ *		continue iteration from the current point.
 *
 *		The *keys* and *values* are output parameters which must point
 *		to memory large enough to hold *count* items based on the key
@@ -873,36 +847,6 @@ union bpf_iter_link_info {
 *		Returns zero on success. On error, -1 is returned and *errno*
 *		is set appropriately.
 *
- * BPF_TOKEN_CREATE
- *	Description
- *		Create BPF token with embedded information about what
- *		BPF-related functionality it allows:
- *		- a set of allowed bpf() syscall commands;
- *		- a set of allowed BPF map types to be created with
- *		BPF_MAP_CREATE command, if BPF_MAP_CREATE itself is allowed;
- *		- a set of allowed BPF program types and BPF program attach
- *		types to be loaded with BPF_PROG_LOAD command, if
- *		BPF_PROG_LOAD itself is allowed.
- *
- *		BPF token is created (derived) from an instance of BPF FS,
- *		assuming it has necessary delegation mount options specified.
- *		This BPF token can be passed as an extra parameter to various
- *		bpf() syscall commands to grant BPF subsystem functionality to
- *		unprivileged processes.
- *
- *		When created, BPF token is "associated" with the owning
- *		user namespace of BPF FS instance (super block) that it was
- *		derived from, and subsequent BPF operations performed with
- *		BPF token would be performing capabilities checks (i.e.,
- *		CAP_BPF, CAP_PERFMON, CAP_NET_ADMIN, CAP_SYS_ADMIN) within
- *		that user namespace. Without BPF token, such capabilities
- *		have to be granted in init user namespace, making bpf()
- *		syscall incompatible with user namespace, for the most part.
- *
- *	Return
- *		A new file descriptor (a nonnegative integer), or -1 if an
- *		error occurred (in which case, *errno* is set appropriately).
- *
 * NOTES
 *	eBPF objects (maps and programs) can be shared between processes.
 *
@@ -957,8 +901,6 @@ enum bpf_cmd {
 	BPF_ITER_CREATE,
 	BPF_LINK_DETACH,
 	BPF_PROG_BIND_MAP,
-	BPF_TOKEN_CREATE,
-	__MAX_BPF_CMD,
 };

 enum bpf_map_type {
@@ -1009,8 +951,6 @@ enum bpf_map_type {
 	BPF_MAP_TYPE_BLOOM_FILTER,
 	BPF_MAP_TYPE_USER_RINGBUF,
 	BPF_MAP_TYPE_CGRP_STORAGE,
-	BPF_MAP_TYPE_ARENA,
-	__MAX_BPF_MAP_TYPE
 };

 /* Note that tracing related programs such as
@@ -1055,7 +995,6 @@ enum bpf_prog_type {
 	BPF_PROG_TYPE_SK_LOOKUP,
 	BPF_PROG_TYPE_SYSCALL, /* a program that can execute syscalls */
 	BPF_PROG_TYPE_NETFILTER,
-	__MAX_BPF_PROG_TYPE
 };

 enum bpf_attach_type {
@@ -1339,10 +1278,6 @@ enum {
 */
 #define BPF_PSEUDO_KFUNC_CALL	2

-enum bpf_addr_space_cast {
-	BPF_ADDR_SPACE_CAST = 1,
-};
-
 /* flags for BPF_MAP_UPDATE_ELEM command */
 enum {
 	BPF_ANY		= 0, /* create new element or update existing */
@@ -1395,18 +1330,6 @@ enum {

 /* Get path from provided FD in BPF_OBJ_PIN/BPF_OBJ_GET commands */
 	BPF_F_PATH_FD		= (1U << 14),
-
-/* Flag for value_type_btf_obj_fd, the fd is available */
-	BPF_F_VTYPE_BTF_OBJ_FD	= (1U << 15),
-
-/* BPF token FD is passed in a corresponding command's token_fd field */
-	BPF_F_TOKEN_FD          = (1U << 16),
-
-/* When user space page faults in bpf_arena send SIGSEGV instead of inserting new page */
-	BPF_F_SEGV_ON_FAULT	= (1U << 17),
-
-/* Do not translate kernel bpf_arena pointers to user pointers */
-	BPF_F_NO_USER_CONV	= (1U << 18),
 };

 /* Flags for BPF_PROG_QUERY. */
@@ -1478,20 +1401,8 @@ union bpf_attr {
 		 * BPF_MAP_TYPE_BLOOM_FILTER - the lowest 4 bits indicate the
 		 * number of hash functions (if 0, the bloom filter will default
 		 * to using 5 hash functions).
-		 *
-		 * BPF_MAP_TYPE_ARENA - contains the address where user space
-		 * is going to mmap() the arena. It has to be page aligned.
 		 */
 		__u64	map_extra;
-
-		__s32   value_type_btf_obj_fd;	/* fd pointing to a BTF
-						 * type data for
-						 * btf_vmlinux_value_type_id.
-						 */
-		/* BPF token FD to use with BPF_MAP_CREATE operation.
-		 * If provided, map_flags should have BPF_F_TOKEN_FD flag set.
-		 */
-		__s32	map_token_fd;
 	};

 	struct { /* anonymous struct used by BPF_MAP_*_ELEM commands */
@@ -1561,10 +1472,6 @@ union bpf_attr {
 		 * truncated), or smaller (if log buffer wasn't filled completely).
 		 */
 		__u32		log_true_size;
-		/* BPF token FD to use with BPF_PROG_LOAD operation.
-		 * If provided, prog_flags should have BPF_F_TOKEN_FD flag set.
-		 */
-		__s32		prog_token_fd;
 	};

 	struct { /* anonymous struct used by BPF_OBJ_* commands */
@@ -1662,10 +1569,8 @@ union bpf_attr {
 	} query;

 	struct { /* anonymous struct used by BPF_RAW_TRACEPOINT_OPEN command */
-		__u64		name;
-		__u32		prog_fd;
-		__u32		:32;
-		__aligned_u64	cookie;
+		__u64 name;
+		__u32 prog_fd;
 	} raw_tracepoint;

 	struct { /* anonymous struct for BPF_BTF_LOAD */
@@ -1679,11 +1584,6 @@ union bpf_attr {
 		 * truncated), or smaller (if log buffer wasn't filled completely).
 		 */
 		__u32		btf_log_true_size;
-		__u32		btf_flags;
-		/* BPF token FD to use with BPF_BTF_LOAD operation.
-		 * If provided, btf_flags should have BPF_F_TOKEN_FD flag set.
-		 */
-		__s32		btf_token_fd;
 	};

 	struct {
@@ -1814,11 +1714,6 @@ union bpf_attr {
 		__u32		flags;		/* extra flags */
 	} prog_bind_map;

-	struct { /* struct used by BPF_TOKEN_CREATE command */
-		__u32		flags;
-		__u32		bpffs_fd;
-	} token_create;
-
 } __attribute__((aligned(8)));

 /* The description below is an attempt at providing documentation to eBPF
@@ -4944,9 +4839,9 @@ union bpf_attr {
 * 		going through the CPU's backlog queue.
 *
 * 		The *flags* argument is reserved and must be 0. The helper is
- * 		currently only supported for tc BPF program types at the
- * 		ingress hook and for veth and netkit target device types. The
- * 		peer device must reside in a different network namespace.
+ * 		currently only supported for tc BPF program types at the ingress
+ * 		hook and for veth device types. The peer device must reside in a
+ * 		different network namespace.
 * 	Return
 * 		The helper returns **TC_ACT_REDIRECT** on success or
 * 		**TC_ACT_SHOT** on error.
@@ -6592,7 +6487,7 @@ struct bpf_map_info {
 	__u32 btf_id;
 	__u32 btf_key_type_id;
 	__u32 btf_value_type_id;
-	__u32 btf_vmlinux_id;
+	__u32 :32;	/* alignment pad */
 	__u64 map_extra;
 } __attribute__((aligned(8)));

@@ -6668,7 +6563,6 @@ struct bpf_link_info {
 			__u32 count; /* in/out: kprobe_multi function count */
 			__u32 flags;
 			__u64 missed;
-			__aligned_u64 cookies;
 		} kprobe_multi;
 		struct {
 			__aligned_u64 path;
@@ -6688,7 +6582,6 @@ struct bpf_link_info {
 					__aligned_u64 file_name; /* in/out */
 					__u32 name_len;
 					__u32 offset; /* offset from file_name */
-					__u64 cookie;
 				} uprobe; /* BPF_PERF_EVENT_UPROBE, BPF_PERF_EVENT_URETPROBE */
 				struct {
 					__aligned_u64 func_name; /* in/out */
@@ -6696,19 +6589,14 @@ struct bpf_link_info {
 					__u32 offset; /* offset from func_name */
 					__u64 addr;
 					__u64 missed;
-					__u64 cookie;
 				} kprobe; /* BPF_PERF_EVENT_KPROBE, BPF_PERF_EVENT_KRETPROBE */
 				struct {
 					__aligned_u64 tp_name;   /* in/out */
 					__u32 name_len;
-					__u32 :32;
-					__u64 cookie;
 				} tracepoint; /* BPF_PERF_EVENT_TRACEPOINT */
 				struct {
 					__u64 config;
 					__u32 type;
-					__u32 :32;
-					__u64 cookie;
 				} event; /* BPF_PERF_EVENT_EVENT */
 			};
 		} perf_event;
@@ -7016,7 +6904,6 @@ enum {
 	BPF_TCP_LISTEN,
 	BPF_TCP_CLOSING,	/* Now a valid state */
 	BPF_TCP_NEW_SYN_RECV,
-	BPF_TCP_BOUND_INACTIVE,

 	BPF_TCP_MAX_STATES	/* Leave at the end! */
 };
--- a/include/uapi/linux/fcntl.h
+++ b/include/uapi/linux/fcntl.h
@@ -116,8 +116,5 @@
 #define AT_HANDLE_FID		AT_REMOVEDIR	/* file handle is needed to
 					compare object identity and may not
 					be usable to open_by_handle_at(2) */
-#if defined(__KERNEL__)
-#define AT_GETATTR_NOSEC	0x80000000
-#endif

 #endif /* _UAPI_LINUX_FCNTL_H */
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -974,7 +974,6 @@ enum {
 	IFLA_BOND_AD_LACP_ACTIVE,
 	IFLA_BOND_MISSED_MAX,
 	IFLA_BOND_NS_IP6_TARGET,
-	IFLA_BOND_COUPLED_CONTROL,
 	__IFLA_BOND_MAX,
 };

--- a/include/uapi/linux/netdev.h
+++ b/include/uapi/linux/netdev.h
@@ -63,6 +63,9 @@ enum netdev_xdp_rx_metadata {
 enum netdev_xsk_flags {
 	NETDEV_XSK_FLAGS_TX_TIMESTAMP = 1,
 	NETDEV_XSK_FLAGS_TX_CHECKSUM = 2,
+
+	/* private: */
+	NETDEV_XSK_FLAGS_MASK = 3,
 };

 enum netdev_queue_type {
@@ -70,10 +73,6 @@ enum netdev_queue_type {
 	NETDEV_QUEUE_TYPE_TX,
 };

-enum netdev_qstats_scope {
-	NETDEV_QSTATS_SCOPE_QUEUE = 1,
-};
-
 enum {
 	NETDEV_A_DEV_IFINDEX = 1,
 	NETDEV_A_DEV_PAD,
@@ -136,21 +135,6 @@ enum {
 	NETDEV_A_QUEUE_MAX = (__NETDEV_A_QUEUE_MAX - 1)
 };

-enum {
-	NETDEV_A_QSTATS_IFINDEX = 1,
-	NETDEV_A_QSTATS_QUEUE_TYPE,
-	NETDEV_A_QSTATS_QUEUE_ID,
-	NETDEV_A_QSTATS_SCOPE,
-	NETDEV_A_QSTATS_RX_PACKETS = 8,
-	NETDEV_A_QSTATS_RX_BYTES,
-	NETDEV_A_QSTATS_TX_PACKETS,
-	NETDEV_A_QSTATS_TX_BYTES,
-	NETDEV_A_QSTATS_RX_ALLOC_FAIL,
-
-	__NETDEV_A_QSTATS_MAX,
-	NETDEV_A_QSTATS_MAX = (__NETDEV_A_QSTATS_MAX - 1)
-};
-
 enum {
 	NETDEV_CMD_DEV_GET = 1,
 	NETDEV_CMD_DEV_ADD_NTF,
@@ -163,7 +147,6 @@ enum {
 	NETDEV_CMD_PAGE_POOL_STATS_GET,
 	NETDEV_CMD_QUEUE_GET,
 	NETDEV_CMD_NAPI_GET,
-	NETDEV_CMD_QSTATS_GET,

 	__NETDEV_CMD_MAX,
 	NETDEV_CMD_MAX = (__NETDEV_CMD_MAX - 1)
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -204,8 +204,6 @@ enum perf_branch_sample_type_shift {

 	PERF_SAMPLE_BRANCH_PRIV_SAVE_SHIFT	= 18, /* save privilege mode */

-	PERF_SAMPLE_BRANCH_COUNTERS_SHIFT	= 19, /* save occurrences of events on a branch */
-
 	PERF_SAMPLE_BRANCH_MAX_SHIFT		/* non-ABI */
 };

@@ -237,8 +235,6 @@ enum perf_branch_sample_type {

 	PERF_SAMPLE_BRANCH_PRIV_SAVE	= 1U << PERF_SAMPLE_BRANCH_PRIV_SAVE_SHIFT,

-	PERF_SAMPLE_BRANCH_COUNTERS	= 1U << PERF_SAMPLE_BRANCH_COUNTERS_SHIFT,
-
 	PERF_SAMPLE_BRANCH_MAX		= 1U << PERF_SAMPLE_BRANCH_MAX_SHIFT,
 };

@@ -986,12 +982,6 @@ enum perf_event_type {
 	 *	{ u64                   nr;
 	 *	  { u64	hw_idx; } && PERF_SAMPLE_BRANCH_HW_INDEX
 	 *        { u64 from, to, flags } lbr[nr];
-	 *        #
-	 *        # The format of the counters is decided by the
-	 *        # "branch_counter_nr" and "branch_counter_width",
-	 *        # which are defined in the ABI.
-	 *        #
-	 *        { u64 counters; } cntr[nr] && PERF_SAMPLE_BRANCH_COUNTERS
 	 *      } && PERF_SAMPLE_BRANCH_STACK
 	 *
 	 * 	{ u64			abi; # enum perf_sample_regs_abi
@@ -1437,9 +1427,6 @@ struct perf_branch_entry {
 		reserved:31;
 };

-/* Size of used info bits in struct perf_branch_entry */
-#define PERF_BRANCH_ENTRY_INFO_BITS_MAX		33
-
 union perf_sample_weight {
 	__u64		full;
 #if defined(__LITTLE_ENDIAN_BITFIELD)
--- a/src/Makefile
+++ b/src/Makefile
@@ -55,7 +55,7 @@ STATIC_OBJDIR := $(OBJDIR)/staticobjs
 OBJS := bpf.o btf.o libbpf.o libbpf_errno.o netlink.o \
 	nlattr.o str_error.o libbpf_probes.o bpf_prog_linfo.o \
 	btf_dump.o hashmap.o ringbuf.o strset.o linker.o gen_loader.o \
-	relo_core.o usdt.o zip.o elf.o features.o
+	relo_core.o usdt.o zip.o elf.o
 SHARED_OBJS := $(addprefix $(SHARED_OBJDIR)/,$(OBJS))
 STATIC_OBJS := $(addprefix $(STATIC_OBJDIR)/,$(OBJS))

--- a/src/bpf.c
+++ b/src/bpf.c
@@ -103,7 +103,7 @@ int sys_bpf_prog_load(union bpf_attr *attr, unsigned int size, int attempts)
 *   [0] https://lore.kernel.org/bpf/20201201215900.3569844-1-guro@fb.com/
 *   [1] d05512618056 ("bpf: Add bpf_ktime_get_coarse_ns helper")
 */
-int probe_memcg_account(int token_fd)
+int probe_memcg_account(void)
 {
 	const size_t attr_sz = offsetofend(union bpf_attr, attach_btf_obj_fd);
 	struct bpf_insn insns[] = {
@@ -120,9 +120,6 @@ int probe_memcg_account(int token_fd)
 	attr.insns = ptr_to_u64(insns);
 	attr.insn_cnt = insn_cnt;
 	attr.license = ptr_to_u64("GPL");
-	attr.prog_token_fd = token_fd;
-	if (token_fd)
-		attr.prog_flags |= BPF_F_TOKEN_FD;

 	prog_fd = sys_bpf_fd(BPF_PROG_LOAD, &attr, attr_sz);
 	if (prog_fd >= 0) {
@@ -149,7 +146,7 @@ int bump_rlimit_memlock(void)
 	struct rlimit rlim;

 	/* if kernel supports memcg-based accounting, skip bumping RLIMIT_MEMLOCK */
-	if (memlock_bumped || feat_supported(NULL, FEAT_MEMCG_ACCOUNT))
+	if (memlock_bumped || kernel_supports(NULL, FEAT_MEMCG_ACCOUNT))
 		return 0;

 	memlock_bumped = true;
@@ -172,7 +169,7 @@ int bpf_map_create(enum bpf_map_type map_type,
 		   __u32 max_entries,
 		   const struct bpf_map_create_opts *opts)
 {
-	const size_t attr_sz = offsetofend(union bpf_attr, map_token_fd);
+	const size_t attr_sz = offsetofend(union bpf_attr, map_extra);
 	union bpf_attr attr;
 	int fd;

@@ -184,7 +181,7 @@ int bpf_map_create(enum bpf_map_type map_type,
 		return libbpf_err(-EINVAL);

 	attr.map_type = map_type;
-	if (map_name && feat_supported(NULL, FEAT_PROG_NAME))
+	if (map_name && kernel_supports(NULL, FEAT_PROG_NAME))
 		libbpf_strlcpy(attr.map_name, map_name, sizeof(attr.map_name));
 	attr.key_size = key_size;
 	attr.value_size = value_size;
@@ -194,7 +191,6 @@ int bpf_map_create(enum bpf_map_type map_type,
 	attr.btf_key_type_id = OPTS_GET(opts, btf_key_type_id, 0);
 	attr.btf_value_type_id = OPTS_GET(opts, btf_value_type_id, 0);
 	attr.btf_vmlinux_value_type_id = OPTS_GET(opts, btf_vmlinux_value_type_id, 0);
-	attr.value_type_btf_obj_fd = OPTS_GET(opts, value_type_btf_obj_fd, 0);

 	attr.inner_map_fd = OPTS_GET(opts, inner_map_fd, 0);
 	attr.map_flags = OPTS_GET(opts, map_flags, 0);
@@ -202,8 +198,6 @@ int bpf_map_create(enum bpf_map_type map_type,
 	attr.numa_node = OPTS_GET(opts, numa_node, 0);
 	attr.map_ifindex = OPTS_GET(opts, map_ifindex, 0);

-	attr.map_token_fd = OPTS_GET(opts, token_fd, 0);
-
 	fd = sys_bpf_fd(BPF_MAP_CREATE, &attr, attr_sz);
 	return libbpf_err_errno(fd);
 }
@@ -238,7 +232,7 @@ int bpf_prog_load(enum bpf_prog_type prog_type,
 		  const struct bpf_insn *insns, size_t insn_cnt,
 		  struct bpf_prog_load_opts *opts)
 {
-	const size_t attr_sz = offsetofend(union bpf_attr, prog_token_fd);
+	const size_t attr_sz = offsetofend(union bpf_attr, log_true_size);
 	void *finfo = NULL, *linfo = NULL;
 	const char *func_info, *line_info;
 	__u32 log_size, log_level, attach_prog_fd, attach_btf_obj_fd;
@@ -267,9 +261,8 @@ int bpf_prog_load(enum bpf_prog_type prog_type,
 	attr.prog_flags = OPTS_GET(opts, prog_flags, 0);
 	attr.prog_ifindex = OPTS_GET(opts, prog_ifindex, 0);
 	attr.kern_version = OPTS_GET(opts, kern_version, 0);
-	attr.prog_token_fd = OPTS_GET(opts, token_fd, 0);

-	if (prog_name && feat_supported(NULL, FEAT_PROG_NAME))
+	if (prog_name && kernel_supports(NULL, FEAT_PROG_NAME))
 		libbpf_strlcpy(attr.prog_name, prog_name, sizeof(attr.prog_name));
 	attr.license = ptr_to_u64(license);

@@ -785,7 +778,6 @@ int bpf_link_create(int prog_fd, int target_fd,
 		if (!OPTS_ZEROED(opts, uprobe_multi))
 			return libbpf_err(-EINVAL);
 		break;
-	case BPF_TRACE_RAW_TP:
 	case BPF_TRACE_FENTRY:
 	case BPF_TRACE_FEXIT:
 	case BPF_MODIFY_RETURN:
@@ -1174,34 +1166,23 @@ int bpf_link_get_info_by_fd(int link_fd, struct bpf_link_info *info, __u32 *info
 	return bpf_obj_get_info_by_fd(link_fd, info, info_len);
 }

-int bpf_raw_tracepoint_open_opts(int prog_fd, struct bpf_raw_tp_opts *opts)
+int bpf_raw_tracepoint_open(const char *name, int prog_fd)
 {
 	const size_t attr_sz = offsetofend(union bpf_attr, raw_tracepoint);
 	union bpf_attr attr;
 	int fd;

-	if (!OPTS_VALID(opts, bpf_raw_tp_opts))
-		return libbpf_err(-EINVAL);
-
 	memset(&attr, 0, attr_sz);
+	attr.raw_tracepoint.name = ptr_to_u64(name);
 	attr.raw_tracepoint.prog_fd = prog_fd;
-	attr.raw_tracepoint.name = ptr_to_u64(OPTS_GET(opts, tp_name, NULL));
-	attr.raw_tracepoint.cookie = OPTS_GET(opts, cookie, 0);

 	fd = sys_bpf_fd(BPF_RAW_TRACEPOINT_OPEN, &attr, attr_sz);
 	return libbpf_err_errno(fd);
 }

-int bpf_raw_tracepoint_open(const char *name, int prog_fd)
-{
-	LIBBPF_OPTS(bpf_raw_tp_opts, opts, .tp_name = name);
-
-	return bpf_raw_tracepoint_open_opts(prog_fd, &opts);
-}
-
 int bpf_btf_load(const void *btf_data, size_t btf_size, struct bpf_btf_load_opts *opts)
 {
-	const size_t attr_sz = offsetofend(union bpf_attr, btf_token_fd);
+	const size_t attr_sz = offsetofend(union bpf_attr, btf_log_true_size);
 	union bpf_attr attr;
 	char *log_buf;
 	size_t log_size;
@@ -1226,10 +1207,6 @@ int bpf_btf_load(const void *btf_data, size_t btf_size, struct bpf_btf_load_opts

 	attr.btf = ptr_to_u64(btf_data);
 	attr.btf_size = btf_size;
-
-	attr.btf_flags = OPTS_GET(opts, btf_flags, 0);
-	attr.btf_token_fd = OPTS_GET(opts, token_fd, 0);
-
 	/* log_level == 0 and log_buf != NULL means "try loading without
 	 * log_buf, but retry with log_buf and log_level=1 on error", which is
 	 * consistent across low-level and high-level BTF and program loading
@@ -1310,20 +1287,3 @@ int bpf_prog_bind_map(int prog_fd, int map_fd,
 	ret = sys_bpf(BPF_PROG_BIND_MAP, &attr, attr_sz);
 	return libbpf_err_errno(ret);
 }
-
-int bpf_token_create(int bpffs_fd, struct bpf_token_create_opts *opts)
-{
-	const size_t attr_sz = offsetofend(union bpf_attr, token_create);
-	union bpf_attr attr;
-	int fd;
-
-	if (!OPTS_VALID(opts, bpf_token_create_opts))
-		return libbpf_err(-EINVAL);
-
-	memset(&attr, 0, attr_sz);
-	attr.token_create.bpffs_fd = bpffs_fd;
-	attr.token_create.flags = OPTS_GET(opts, flags, 0);
-
-	fd = sys_bpf_fd(BPF_TOKEN_CREATE, &attr, attr_sz);
-	return libbpf_err_errno(fd);
-}
--- a/src/bpf.h
+++ b/src/bpf.h
@@ -35,7 +35,7 @@
 extern "C" {
 #endif

-LIBBPF_API int libbpf_set_memlock_rlim(size_t memlock_bytes);
+int libbpf_set_memlock_rlim(size_t memlock_bytes);

 struct bpf_map_create_opts {
 	size_t sz; /* size of this struct for forward/backward compatibility */
@@ -51,12 +51,8 @@ struct bpf_map_create_opts {

 	__u32 numa_node;
 	__u32 map_ifindex;
-	__s32 value_type_btf_obj_fd;
-
-	__u32 token_fd;
-	size_t :0;
 };
-#define bpf_map_create_opts__last_field token_fd
+#define bpf_map_create_opts__last_field map_ifindex

 LIBBPF_API int bpf_map_create(enum bpf_map_type map_type,
 			      const char *map_name,
@@ -106,10 +102,9 @@ struct bpf_prog_load_opts {
 	 * If kernel doesn't support this feature, log_size is left unchanged.
 	 */
 	__u32 log_true_size;
-	__u32 token_fd;
 	size_t :0;
 };
-#define bpf_prog_load_opts__last_field token_fd
+#define bpf_prog_load_opts__last_field log_true_size

 LIBBPF_API int bpf_prog_load(enum bpf_prog_type prog_type,
 			     const char *prog_name, const char *license,
@@ -135,12 +130,9 @@ struct bpf_btf_load_opts {
 	 * If kernel doesn't support this feature, log_size is left unchanged.
 	 */
 	__u32 log_true_size;
-
-	__u32 btf_flags;
-	__u32 token_fd;
 	size_t :0;
 };
-#define bpf_btf_load_opts__last_field token_fd
+#define bpf_btf_load_opts__last_field log_true_size

 LIBBPF_API int bpf_btf_load(const void *btf_data, size_t btf_size,
 			    struct bpf_btf_load_opts *opts);
@@ -190,14 +182,10 @@ LIBBPF_API int bpf_map_delete_batch(int fd, const void *keys,
 /**
 * @brief **bpf_map_lookup_batch()** allows for batch lookup of BPF map elements.
 *
- * The parameter *in_batch* is the address of the first element in the batch to
- * read. *out_batch* is an output parameter that should be passed as *in_batch*
- * to subsequent calls to **bpf_map_lookup_batch()**. NULL can be passed for
- * *in_batch* to indicate that the batched lookup starts from the beginning of
- * the map. Both *in_batch* and *out_batch* must point to memory large enough to
- * hold a single key, except for maps of type **BPF_MAP_TYPE_{HASH, PERCPU_HASH,
- * LRU_HASH, LRU_PERCPU_HASH}**, for which the memory size must be at
- * least 4 bytes wide regardless of key size.
+ * The parameter *in_batch* is the address of the first element in the batch to read.
+ * *out_batch* is an output parameter that should be passed as *in_batch* to subsequent
+ * calls to **bpf_map_lookup_batch()**. NULL can be passed for *in_batch* to indicate
+ * that the batched lookup starts from the beginning of the map.
 *
 * The *keys* and *values* are output parameters which must point to memory large enough to
 * hold *count* items based on the key and value size of the map *map_fd*. The *keys*
@@ -230,10 +218,7 @@ LIBBPF_API int bpf_map_lookup_batch(int fd, void *in_batch, void *out_batch,
 *
 * @param fd BPF map file descriptor
 * @param in_batch address of the first element in batch to read, can pass NULL to
- * get address of the first element in *out_batch*. If not NULL, must be large
- * enough to hold a key. For **BPF_MAP_TYPE_{HASH, PERCPU_HASH, LRU_HASH,
- * LRU_PERCPU_HASH}**, the memory size must be at least 4 bytes wide regardless
- * of key size.
+ * get address of the first element in *out_batch*
 * @param out_batch output parameter that should be passed to next call as *in_batch*
 * @param keys pointer to an array of *count* keys
 * @param values pointer to an array large enough for *count* values
@@ -507,10 +492,7 @@ LIBBPF_API int bpf_obj_get_info_by_fd(int bpf_fd, void *info, __u32 *info_len);
 * program corresponding to *prog_fd*.
 *
 * Populates up to *info_len* bytes of *info* and updates *info_len* with the
- * actual number of bytes written to *info*. Note that *info* should be
- * zero-initialized or initialized as expected by the requested *info*
- * type. Failing to (zero-)initialize *info* under certain circumstances can
- * result in this helper returning an error.
+ * actual number of bytes written to *info*.
 *
 * @param prog_fd BPF program file descriptor
 * @param info pointer to **struct bpf_prog_info** that will be populated with
@@ -527,10 +509,7 @@ LIBBPF_API int bpf_prog_get_info_by_fd(int prog_fd, struct bpf_prog_info *info,
 * map corresponding to *map_fd*.
 *
 * Populates up to *info_len* bytes of *info* and updates *info_len* with the
- * actual number of bytes written to *info*. Note that *info* should be
- * zero-initialized or initialized as expected by the requested *info*
- * type. Failing to (zero-)initialize *info* under certain circumstances can
- * result in this helper returning an error.
+ * actual number of bytes written to *info*.
 *
 * @param map_fd BPF map file descriptor
 * @param info pointer to **struct bpf_map_info** that will be populated with
@@ -543,14 +522,11 @@ LIBBPF_API int bpf_prog_get_info_by_fd(int prog_fd, struct bpf_prog_info *info,
 LIBBPF_API int bpf_map_get_info_by_fd(int map_fd, struct bpf_map_info *info, __u32 *info_len);

 /**
- * @brief **bpf_btf_get_info_by_fd()** obtains information about the
+ * @brief **bpf_btf_get_info_by_fd()** obtains information about the 
 * BTF object corresponding to *btf_fd*.
 *
 * Populates up to *info_len* bytes of *info* and updates *info_len* with the
- * actual number of bytes written to *info*. Note that *info* should be
- * zero-initialized or initialized as expected by the requested *info*
- * type. Failing to (zero-)initialize *info* under certain circumstances can
- * result in this helper returning an error.
+ * actual number of bytes written to *info*.
 *
 * @param btf_fd BTF object file descriptor
 * @param info pointer to **struct bpf_btf_info** that will be populated with
@@ -567,10 +543,7 @@ LIBBPF_API int bpf_btf_get_info_by_fd(int btf_fd, struct bpf_btf_info *info, __u
 * link corresponding to *link_fd*.
 *
 * Populates up to *info_len* bytes of *info* and updates *info_len* with the
- * actual number of bytes written to *info*. Note that *info* should be
- * zero-initialized or initialized as expected by the requested *info*
- * type. Failing to (zero-)initialize *info* under certain circumstances can
- * result in this helper returning an error.
+ * actual number of bytes written to *info*.
 *
 * @param link_fd BPF link file descriptor
 * @param info pointer to **struct bpf_link_info** that will be populated with
@@ -617,15 +590,6 @@ LIBBPF_API int bpf_prog_query(int target_fd, enum bpf_attach_type type,
 			      __u32 query_flags, __u32 *attach_flags,
 			      __u32 *prog_ids, __u32 *prog_cnt);

-struct bpf_raw_tp_opts {
-	size_t sz; /* size of this struct for forward/backward compatibility */
-	const char *tp_name;
-	__u64 cookie;
-	size_t :0;
-};
-#define bpf_raw_tp_opts__last_field cookie
-
-LIBBPF_API int bpf_raw_tracepoint_open_opts(int prog_fd, struct bpf_raw_tp_opts *opts);
 LIBBPF_API int bpf_raw_tracepoint_open(const char *name, int prog_fd);
 LIBBPF_API int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf,
 				 __u32 *buf_len, __u32 *prog_id, __u32 *fd_type,
@@ -676,30 +640,6 @@ struct bpf_test_run_opts {
 LIBBPF_API int bpf_prog_test_run_opts(int prog_fd,
 				      struct bpf_test_run_opts *opts);

-struct bpf_token_create_opts {
-	size_t sz; /* size of this struct for forward/backward compatibility */
-	__u32 flags;
-	size_t :0;
-};
-#define bpf_token_create_opts__last_field flags
-
-/**
- * @brief **bpf_token_create()** creates a new instance of BPF token derived
- * from specified BPF FS mount point.
- *
- * BPF token created with this API can be passed to bpf() syscall for
- * commands like BPF_PROG_LOAD, BPF_MAP_CREATE, etc.
- *
- * @param bpffs_fd FD for BPF FS instance from which to derive a BPF token
- * instance.
- * @param opts optional BPF token creation options, can be NULL
- *
- * @return BPF token FD > 0, on success; negative error code, otherwise (errno
- * is also set to the error code)
- */
-LIBBPF_API int bpf_token_create(int bpffs_fd,
-				struct bpf_token_create_opts *opts);
-
 #ifdef __cplusplus
 } /* extern "C" */
 #endif
--- a/src/bpf_core_read.h
+++ b/src/bpf_core_read.h
@@ -2,8 +2,6 @@
 #ifndef __BPF_CORE_READ_H__
 #define __BPF_CORE_READ_H__

-#include <bpf/bpf_helpers.h>
-
 /*
 * enum bpf_field_info_kind is passed as a second argument into
 * __builtin_preserve_field_info() built-in to get a specific aspect of
@@ -46,7 +44,7 @@ enum bpf_enum_value_kind {
 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
 #define __CORE_BITFIELD_PROBE_READ(dst, src, fld)			      \
 	bpf_probe_read_kernel(						      \
-			(void *)dst,					      \
+			(void *)dst,				      \
 			__CORE_RELO(src, fld, BYTE_SIZE),		      \
 			(const void *)src + __CORE_RELO(src, fld, BYTE_OFFSET))
 #else
@@ -145,29 +143,8 @@ enum bpf_enum_value_kind {
 	}								\
 })

-/* Differentiator between compilers builtin implementations. This is a
- * requirement due to the compiler parsing differences where GCC optimizes
- * early in parsing those constructs of type pointers to the builtin specific
- * type, resulting in not being possible to collect the required type
- * information in the builtin expansion.
- */
-#ifdef __clang__
-#define ___bpf_typeof(type) ((typeof(type) *) 0)
-#else
-#define ___bpf_typeof1(type, NR) ({					    \
-	extern typeof(type) *___concat(bpf_type_tmp_, NR);		    \
-	___concat(bpf_type_tmp_, NR);					    \
-})
-#define ___bpf_typeof(type) ___bpf_typeof1(type, __COUNTER__)
-#endif
-
-#ifdef __clang__
 #define ___bpf_field_ref1(field)	(field)
-#define ___bpf_field_ref2(type, field)	(___bpf_typeof(type)->field)
-#else
-#define ___bpf_field_ref1(field)	(&(field))
-#define ___bpf_field_ref2(type, field)	(&(___bpf_typeof(type)->field))
-#endif
+#define ___bpf_field_ref2(type, field)	(((typeof(type) *)0)->field)
 #define ___bpf_field_ref(args...)					    \
 	___bpf_apply(___bpf_field_ref, ___bpf_narg(args))(args)

@@ -217,7 +194,7 @@ enum bpf_enum_value_kind {
 * BTF. Always succeeds.
 */
 #define bpf_core_type_id_local(type)					    \
-	__builtin_btf_type_id(*___bpf_typeof(type), BPF_TYPE_ID_LOCAL)
+	__builtin_btf_type_id(*(typeof(type) *)0, BPF_TYPE_ID_LOCAL)

 /*
 * Convenience macro to get BTF type ID of a target kernel's type that matches
@@ -227,7 +204,7 @@ enum bpf_enum_value_kind {
 *    - 0, if no matching type was found in a target kernel BTF.
 */
 #define bpf_core_type_id_kernel(type)					    \
-	__builtin_btf_type_id(*___bpf_typeof(type), BPF_TYPE_ID_TARGET)
+	__builtin_btf_type_id(*(typeof(type) *)0, BPF_TYPE_ID_TARGET)

 /*
 * Convenience macro to check that provided named type
@@ -237,7 +214,7 @@ enum bpf_enum_value_kind {
 *    0, if no matching type is found.
 */
 #define bpf_core_type_exists(type)					    \
-	__builtin_preserve_type_info(*___bpf_typeof(type), BPF_TYPE_EXISTS)
+	__builtin_preserve_type_info(*(typeof(type) *)0, BPF_TYPE_EXISTS)

 /*
 * Convenience macro to check that provided named type
@@ -247,7 +224,7 @@ enum bpf_enum_value_kind {
 *    0, if the type does not match any in the target kernel
 */
 #define bpf_core_type_matches(type)					    \
-	__builtin_preserve_type_info(*___bpf_typeof(type), BPF_TYPE_MATCHES)
+	__builtin_preserve_type_info(*(typeof(type) *)0, BPF_TYPE_MATCHES)

 /*
 * Convenience macro to get the byte size of a provided named type
@@ -257,7 +234,7 @@ enum bpf_enum_value_kind {
 *    0, if no matching type is found.
 */
 #define bpf_core_type_size(type)					    \
-	__builtin_preserve_type_info(*___bpf_typeof(type), BPF_TYPE_SIZE)
+	__builtin_preserve_type_info(*(typeof(type) *)0, BPF_TYPE_SIZE)

 /*
 * Convenience macro to check that provided enumerator value is defined in
@@ -267,13 +244,8 @@ enum bpf_enum_value_kind {
 *    kernel's BTF;
 *    0, if no matching enum and/or enum value within that enum is found.
 */
-#ifdef __clang__
 #define bpf_core_enum_value_exists(enum_type, enum_value)		    \
 	__builtin_preserve_enum_value(*(typeof(enum_type) *)enum_value, BPF_ENUMVAL_EXISTS)
-#else
-#define bpf_core_enum_value_exists(enum_type, enum_value)		    \
-	__builtin_preserve_enum_value(___bpf_typeof(enum_type), enum_value, BPF_ENUMVAL_EXISTS)
-#endif

 /*
 * Convenience macro to get the integer value of an enumerator value in
@@ -283,13 +255,8 @@ enum bpf_enum_value_kind {
 *    present in target kernel's BTF;
 *    0, if no matching enum and/or enum value within that enum is found.
 */
-#ifdef __clang__
 #define bpf_core_enum_value(enum_type, enum_value)			    \
 	__builtin_preserve_enum_value(*(typeof(enum_type) *)enum_value, BPF_ENUMVAL_VALUE)
-#else
-#define bpf_core_enum_value(enum_type, enum_value)			    \
-	__builtin_preserve_enum_value(___bpf_typeof(enum_type), enum_value, BPF_ENUMVAL_VALUE)
-#endif

 /*
 * bpf_core_read() abstracts away bpf_probe_read_kernel() call and captures
@@ -301,7 +268,7 @@ enum bpf_enum_value_kind {
 * a relocation, which records BTF type ID describing root struct/union and an
 * accessor string which describes exact embedded field that was used to take
 * an address. See detailed description of this relocation format and
- * semantics in comments to struct bpf_core_relo in include/uapi/linux/bpf.h.
+ * semantics in comments to struct bpf_field_reloc in libbpf_internal.h.
 *
 * This relocation allows libbpf to adjust BPF instruction to use correct
 * actual field offset, based on target kernel BTF type that matches original
@@ -325,17 +292,6 @@ enum bpf_enum_value_kind {
 #define bpf_core_read_user_str(dst, sz, src)				    \
 	bpf_probe_read_user_str(dst, sz, (const void *)__builtin_preserve_access_index(src))

-extern void *bpf_rdonly_cast(const void *obj, __u32 btf_id) __ksym __weak;
-
-/*
- * Cast provided pointer *ptr* into a pointer to a specified *type* in such
- * a way that BPF verifier will become aware of associated kernel-side BTF
- * type. This allows to access members of kernel types directly without the
- * need to use BPF_CORE_READ() macros.
- */
-#define bpf_core_cast(ptr, type)					    \
-	((typeof(type) *)bpf_rdonly_cast((ptr), bpf_core_type_id_kernel(type)))
-
 #define ___concat(a, b) a ## b
 #define ___apply(fn, n) ___concat(fn, n)
 #define ___nth(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, __11, N, ...) N
--- a/src/bpf_helper_defs.h
+++ b/src/bpf_helper_defs.h
--- a/src/bpf_helpers.h
+++ b/src/bpf_helpers.h
@@ -13,7 +13,6 @@
 #define __uint(name, val) int (*name)[val]
 #define __type(name, val) typeof(val) *name
 #define __array(name, val) typeof(val) *name[]
-#define __ulong(name, val) enum { ___bpf_concat(__unique_value, __COUNTER__) = val } name

 /*
 * Helper macro to place programs, maps, license in
@@ -191,9 +190,6 @@ enum libbpf_tristate {

 #define __arg_ctx __attribute__((btf_decl_tag("arg:ctx")))
 #define __arg_nonnull __attribute((btf_decl_tag("arg:nonnull")))
-#define __arg_nullable __attribute((btf_decl_tag("arg:nullable")))
-#define __arg_trusted __attribute((btf_decl_tag("arg:trusted")))
-#define __arg_arena __attribute((btf_decl_tag("arg:arena")))

 #ifndef ___bpf_concat
 #define ___bpf_concat(a, b) a ## b
--- a/src/btf.c
+++ b/src/btf.c
@@ -1079,11 +1079,6 @@ struct btf *btf__new(const void *data, __u32 size)
 	return libbpf_ptr(btf_new(data, size, NULL));
 }

-struct btf *btf__new_split(const void *data, __u32 size, struct btf *base_btf)
-{
-	return libbpf_ptr(btf_new(data, size, base_btf));
-}
-
 static struct btf *btf_parse_elf(const char *path, struct btf *base_btf,
 				 struct btf_ext **btf_ext)
 {
@@ -1322,9 +1317,7 @@ struct btf *btf__parse_split(const char *path, struct btf *base_btf)

 static void *btf_get_raw_data(const struct btf *btf, __u32 *size, bool swap_endian);

-int btf_load_into_kernel(struct btf *btf,
-			 char *log_buf, size_t log_sz, __u32 log_level,
-			 int token_fd)
+int btf_load_into_kernel(struct btf *btf, char *log_buf, size_t log_sz, __u32 log_level)
 {
 	LIBBPF_OPTS(bpf_btf_load_opts, opts);
 	__u32 buf_sz = 0, raw_size;
@@ -1374,10 +1367,6 @@ retry_load:
 		opts.log_level = log_level;
 	}

-	opts.token_fd = token_fd;
-	if (token_fd)
-		opts.btf_flags |= BPF_F_TOKEN_FD;
-
 	btf->fd = bpf_btf_load(raw_data, raw_size, &opts);
 	if (btf->fd < 0) {
 		/* time to turn on verbose mode and try again */
@@ -1405,7 +1394,7 @@ done:

 int btf__load_into_kernel(struct btf *btf)
 {
-	return btf_load_into_kernel(btf, NULL, 0, 0, 0);
+	return btf_load_into_kernel(btf, NULL, 0, 0);
 }

 int btf__fd(const struct btf *btf)
@@ -3050,16 +3039,12 @@ done:
 	return btf_ext;
 }

-const void *btf_ext__raw_data(const struct btf_ext *btf_ext, __u32 *size)
+const void *btf_ext__get_raw_data(const struct btf_ext *btf_ext, __u32 *size)
 {
 	*size = btf_ext->data_size;
 	return btf_ext->data;
 }

-__attribute__((alias("btf_ext__raw_data")))
-const void *btf_ext__get_raw_data(const struct btf_ext *btf_ext, __u32 *size);
-
-
 struct btf_dedup;

 static struct btf_dedup *btf_dedup_new(struct btf *btf, const struct btf_dedup_opts *opts);
@@ -4941,9 +4926,10 @@ static int btf_dedup_remap_types(struct btf_dedup *d)
 */
 struct btf *btf__load_vmlinux_btf(void)
 {
-	const char *sysfs_btf_path = "/sys/kernel/btf/vmlinux";
-	/* fall back locations, trying to find vmlinux on disk */
 	const char *locations[] = {
+		/* try canonical vmlinux BTF through sysfs first */
+		"/sys/kernel/btf/vmlinux",
+		/* fall back to trying to find vmlinux on disk otherwise */
 		"/boot/vmlinux-%1$s",
 		"/lib/modules/%1$s/vmlinux-%1$s",
 		"/lib/modules/%1$s/build/vmlinux",
@@ -4957,23 +4943,8 @@ struct btf *btf__load_vmlinux_btf(void)
 	struct btf *btf;
 	int i, err;

-	/* is canonical sysfs location accessible? */
-	if (faccessat(AT_FDCWD, sysfs_btf_path, F_OK, AT_EACCESS) < 0) {
-		pr_warn("kernel BTF is missing at '%s', was CONFIG_DEBUG_INFO_BTF enabled?\n",
-			sysfs_btf_path);
-	} else {
-		btf = btf__parse(sysfs_btf_path, NULL);
-		if (!btf) {
-			err = -errno;
-			pr_warn("failed to read kernel BTF from '%s': %d\n", sysfs_btf_path, err);
-			return libbpf_err_ptr(err);
-		}
-		pr_debug("loaded kernel BTF from '%s'\n", sysfs_btf_path);
-		return btf;
-	}
-
-	/* try fallback locations */
 	uname(&buf);
+
 	for (i = 0; i < ARRAY_SIZE(locations); i++) {
 		snprintf(path, PATH_MAX, locations[i], buf.release);

--- a/src/elf.c
+++ b/src/elf.c
@@ -11,6 +11,8 @@
 #include "libbpf_internal.h"
 #include "str_error.h"

+#define STRERR_BUFSIZE  128
+
 /* A SHT_GNU_versym section holds 16-bit words. This bit is set if
 * the symbol is hidden and can only be seen when referenced using an
 * explicit version number. This is a GNU extension.
--- a/src/features.c
+++ b/src/features.c
@@ -1,583 +0,0 @@
-// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
-/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */
-#include <linux/kernel.h>
-#include <linux/filter.h>
-#include "bpf.h"
-#include "libbpf.h"
-#include "libbpf_common.h"
-#include "libbpf_internal.h"
-#include "str_error.h"
-
-static inline __u64 ptr_to_u64(const void *ptr)
-{
-	return (__u64)(unsigned long)ptr;
-}
-
-int probe_fd(int fd)
-{
-	if (fd >= 0)
-		close(fd);
-	return fd >= 0;
-}
-
-static int probe_kern_prog_name(int token_fd)
-{
-	const size_t attr_sz = offsetofend(union bpf_attr, prog_name);
-	struct bpf_insn insns[] = {
-		BPF_MOV64_IMM(BPF_REG_0, 0),
-		BPF_EXIT_INSN(),
-	};
-	union bpf_attr attr;
-	int ret;
-
-	memset(&attr, 0, attr_sz);
-	attr.prog_type = BPF_PROG_TYPE_SOCKET_FILTER;
-	attr.license = ptr_to_u64("GPL");
-	attr.insns = ptr_to_u64(insns);
-	attr.insn_cnt = (__u32)ARRAY_SIZE(insns);
-	attr.prog_token_fd = token_fd;
-	if (token_fd)
-		attr.prog_flags |= BPF_F_TOKEN_FD;
-	libbpf_strlcpy(attr.prog_name, "libbpf_nametest", sizeof(attr.prog_name));
-
-	/* make sure loading with name works */
-	ret = sys_bpf_prog_load(&attr, attr_sz, PROG_LOAD_ATTEMPTS);
-	return probe_fd(ret);
-}
-
-static int probe_kern_global_data(int token_fd)
-{
-	char *cp, errmsg[STRERR_BUFSIZE];
-	struct bpf_insn insns[] = {
-		BPF_LD_MAP_VALUE(BPF_REG_1, 0, 16),
-		BPF_ST_MEM(BPF_DW, BPF_REG_1, 0, 42),
-		BPF_MOV64_IMM(BPF_REG_0, 0),
-		BPF_EXIT_INSN(),
-	};
-	LIBBPF_OPTS(bpf_map_create_opts, map_opts,
-		.token_fd = token_fd,
-		.map_flags = token_fd ? BPF_F_TOKEN_FD : 0,
-	);
-	LIBBPF_OPTS(bpf_prog_load_opts, prog_opts,
-		.token_fd = token_fd,
-		.prog_flags = token_fd ? BPF_F_TOKEN_FD : 0,
-	);
-	int ret, map, insn_cnt = ARRAY_SIZE(insns);
-
-	map = bpf_map_create(BPF_MAP_TYPE_ARRAY, "libbpf_global", sizeof(int), 32, 1, &map_opts);
-	if (map < 0) {
-		ret = -errno;
-		cp = libbpf_strerror_r(ret, errmsg, sizeof(errmsg));
-		pr_warn("Error in %s():%s(%d). Couldn't create simple array map.\n",
-			__func__, cp, -ret);
-		return ret;
-	}
-
-	insns[0].imm = map;
-
-	ret = bpf_prog_load(BPF_PROG_TYPE_SOCKET_FILTER, NULL, "GPL", insns, insn_cnt, &prog_opts);
-	close(map);
-	return probe_fd(ret);
-}
-
-static int probe_kern_btf(int token_fd)
-{
-	static const char strs[] = "\0int";
-	__u32 types[] = {
-		/* int */
-		BTF_TYPE_INT_ENC(1, BTF_INT_SIGNED, 0, 32, 4),
-	};
-
-	return probe_fd(libbpf__load_raw_btf((char *)types, sizeof(types),
-					     strs, sizeof(strs), token_fd));
-}
-
-static int probe_kern_btf_func(int token_fd)
-{
-	static const char strs[] = "\0int\0x\0a";
-	/* void x(int a) {} */
-	__u32 types[] = {
-		/* int */
-		BTF_TYPE_INT_ENC(1, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
-		/* FUNC_PROTO */                                /* [2] */
-		BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_FUNC_PROTO, 0, 1), 0),
-		BTF_PARAM_ENC(7, 1),
-		/* FUNC x */                                    /* [3] */
-		BTF_TYPE_ENC(5, BTF_INFO_ENC(BTF_KIND_FUNC, 0, 0), 2),
-	};
-
-	return probe_fd(libbpf__load_raw_btf((char *)types, sizeof(types),
-					     strs, sizeof(strs), token_fd));
-}
-
-static int probe_kern_btf_func_global(int token_fd)
-{
-	static const char strs[] = "\0int\0x\0a";
-	/* static void x(int a) {} */
-	__u32 types[] = {
-		/* int */
-		BTF_TYPE_INT_ENC(1, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
-		/* FUNC_PROTO */                                /* [2] */
-		BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_FUNC_PROTO, 0, 1), 0),
-		BTF_PARAM_ENC(7, 1),
-		/* FUNC x BTF_FUNC_GLOBAL */                    /* [3] */
-		BTF_TYPE_ENC(5, BTF_INFO_ENC(BTF_KIND_FUNC, 0, BTF_FUNC_GLOBAL), 2),
-	};
-
-	return probe_fd(libbpf__load_raw_btf((char *)types, sizeof(types),
-					     strs, sizeof(strs), token_fd));
-}
-
-static int probe_kern_btf_datasec(int token_fd)
-{
-	static const char strs[] = "\0x\0.data";
-	/* static int a; */
-	__u32 types[] = {
-		/* int */
-		BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
-		/* VAR x */                                     /* [2] */
-		BTF_TYPE_ENC(1, BTF_INFO_ENC(BTF_KIND_VAR, 0, 0), 1),
-		BTF_VAR_STATIC,
-		/* DATASEC val */                               /* [3] */
-		BTF_TYPE_ENC(3, BTF_INFO_ENC(BTF_KIND_DATASEC, 0, 1), 4),
-		BTF_VAR_SECINFO_ENC(2, 0, 4),
-	};
-
-	return probe_fd(libbpf__load_raw_btf((char *)types, sizeof(types),
-					     strs, sizeof(strs), token_fd));
-}
-
-static int probe_kern_btf_qmark_datasec(int token_fd)
-{
-	static const char strs[] = "\0x\0?.data";
-	/* static int a; */
-	__u32 types[] = {
-		/* int */
-		BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
-		/* VAR x */                                     /* [2] */
-		BTF_TYPE_ENC(1, BTF_INFO_ENC(BTF_KIND_VAR, 0, 0), 1),
-		BTF_VAR_STATIC,
-		/* DATASEC ?.data */                            /* [3] */
-		BTF_TYPE_ENC(3, BTF_INFO_ENC(BTF_KIND_DATASEC, 0, 1), 4),
-		BTF_VAR_SECINFO_ENC(2, 0, 4),
-	};
-
-	return probe_fd(libbpf__load_raw_btf((char *)types, sizeof(types),
-					     strs, sizeof(strs), token_fd));
-}
-
-static int probe_kern_btf_float(int token_fd)
-{
-	static const char strs[] = "\0float";
-	__u32 types[] = {
-		/* float */
-		BTF_TYPE_FLOAT_ENC(1, 4),
-	};
-
-	return probe_fd(libbpf__load_raw_btf((char *)types, sizeof(types),
-					     strs, sizeof(strs), token_fd));
-}
-
-static int probe_kern_btf_decl_tag(int token_fd)
-{
-	static const char strs[] = "\0tag";
-	__u32 types[] = {
-		/* int */
-		BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
-		/* VAR x */                                     /* [2] */
-		BTF_TYPE_ENC(1, BTF_INFO_ENC(BTF_KIND_VAR, 0, 0), 1),
-		BTF_VAR_STATIC,
-		/* attr */
-		BTF_TYPE_DECL_TAG_ENC(1, 2, -1),
-	};
-
-	return probe_fd(libbpf__load_raw_btf((char *)types, sizeof(types),
-					     strs, sizeof(strs), token_fd));
-}
-
-static int probe_kern_btf_type_tag(int token_fd)
-{
-	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), token_fd));
-}
-
-static int probe_kern_array_mmap(int token_fd)
-{
-	LIBBPF_OPTS(bpf_map_create_opts, opts,
-		.map_flags = BPF_F_MMAPABLE | (token_fd ? BPF_F_TOKEN_FD : 0),
-		.token_fd = token_fd,
-	);
-	int fd;
-
-	fd = bpf_map_create(BPF_MAP_TYPE_ARRAY, "libbpf_mmap", sizeof(int), sizeof(int), 1, &opts);
-	return probe_fd(fd);
-}
-
-static int probe_kern_exp_attach_type(int token_fd)
-{
-	LIBBPF_OPTS(bpf_prog_load_opts, opts,
-		.expected_attach_type = BPF_CGROUP_INET_SOCK_CREATE,
-		.token_fd = token_fd,
-		.prog_flags = token_fd ? BPF_F_TOKEN_FD : 0,
-	);
-	struct bpf_insn insns[] = {
-		BPF_MOV64_IMM(BPF_REG_0, 0),
-		BPF_EXIT_INSN(),
-	};
-	int fd, insn_cnt = ARRAY_SIZE(insns);
-
-	/* 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
-	 */
-	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(int token_fd)
-{
-	LIBBPF_OPTS(bpf_prog_load_opts, opts,
-		.token_fd = token_fd,
-		.prog_flags = token_fd ? BPF_F_TOKEN_FD : 0,
-	);
-	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 */
-		BPF_MOV64_IMM(BPF_REG_2, 8),		/* r2 = 8 */
-		BPF_MOV64_IMM(BPF_REG_3, 0),		/* r3 = 0 */
-		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);
-
-	fd = bpf_prog_load(BPF_PROG_TYPE_TRACEPOINT, NULL, "GPL", insns, insn_cnt, &opts);
-	return probe_fd(fd);
-}
-
-static int probe_prog_bind_map(int token_fd)
-{
-	char *cp, errmsg[STRERR_BUFSIZE];
-	struct bpf_insn insns[] = {
-		BPF_MOV64_IMM(BPF_REG_0, 0),
-		BPF_EXIT_INSN(),
-	};
-	LIBBPF_OPTS(bpf_map_create_opts, map_opts,
-		.token_fd = token_fd,
-		.map_flags = token_fd ? BPF_F_TOKEN_FD : 0,
-	);
-	LIBBPF_OPTS(bpf_prog_load_opts, prog_opts,
-		.token_fd = token_fd,
-		.prog_flags = token_fd ? BPF_F_TOKEN_FD : 0,
-	);
-	int ret, map, prog, insn_cnt = ARRAY_SIZE(insns);
-
-	map = bpf_map_create(BPF_MAP_TYPE_ARRAY, "libbpf_det_bind", sizeof(int), 32, 1, &map_opts);
-	if (map < 0) {
-		ret = -errno;
-		cp = libbpf_strerror_r(ret, errmsg, sizeof(errmsg));
-		pr_warn("Error in %s():%s(%d). Couldn't create simple array map.\n",
-			__func__, cp, -ret);
-		return ret;
-	}
-
-	prog = bpf_prog_load(BPF_PROG_TYPE_SOCKET_FILTER, NULL, "GPL", insns, insn_cnt, &prog_opts);
-	if (prog < 0) {
-		close(map);
-		return 0;
-	}
-
-	ret = bpf_prog_bind_map(prog, map, NULL);
-
-	close(map);
-	close(prog);
-
-	return ret >= 0;
-}
-
-static int probe_module_btf(int token_fd)
-{
-	static const char strs[] = "\0int";
-	__u32 types[] = {
-		/* int */
-		BTF_TYPE_INT_ENC(1, BTF_INT_SIGNED, 0, 32, 4),
-	};
-	struct bpf_btf_info info;
-	__u32 len = sizeof(info);
-	char name[16];
-	int fd, err;
-
-	fd = libbpf__load_raw_btf((char *)types, sizeof(types), strs, sizeof(strs), token_fd);
-	if (fd < 0)
-		return 0; /* BTF not supported at all */
-
-	memset(&info, 0, sizeof(info));
-	info.name = ptr_to_u64(name);
-	info.name_len = sizeof(name);
-
-	/* check that BPF_OBJ_GET_INFO_BY_FD supports specifying name pointer;
-	 * kernel's module BTF support coincides with support for
-	 * name/name_len fields in struct bpf_btf_info.
-	 */
-	err = bpf_btf_get_info_by_fd(fd, &info, &len);
-	close(fd);
-	return !err;
-}
-
-static int probe_perf_link(int token_fd)
-{
-	struct bpf_insn insns[] = {
-		BPF_MOV64_IMM(BPF_REG_0, 0),
-		BPF_EXIT_INSN(),
-	};
-	LIBBPF_OPTS(bpf_prog_load_opts, opts,
-		.token_fd = token_fd,
-		.prog_flags = token_fd ? BPF_F_TOKEN_FD : 0,
-	);
-	int prog_fd, link_fd, err;
-
-	prog_fd = bpf_prog_load(BPF_PROG_TYPE_TRACEPOINT, NULL, "GPL",
-				insns, ARRAY_SIZE(insns), &opts);
-	if (prog_fd < 0)
-		return -errno;
-
-	/* use invalid perf_event FD to get EBADF, if link is supported;
-	 * otherwise EINVAL should be returned
-	 */
-	link_fd = bpf_link_create(prog_fd, -1, BPF_PERF_EVENT, NULL);
-	err = -errno; /* close() can clobber errno */
-
-	if (link_fd >= 0)
-		close(link_fd);
-	close(prog_fd);
-
-	return link_fd < 0 && err == -EBADF;
-}
-
-static int probe_uprobe_multi_link(int token_fd)
-{
-	LIBBPF_OPTS(bpf_prog_load_opts, load_opts,
-		.expected_attach_type = BPF_TRACE_UPROBE_MULTI,
-		.token_fd = token_fd,
-		.prog_flags = token_fd ? BPF_F_TOKEN_FD : 0,
-	);
-	LIBBPF_OPTS(bpf_link_create_opts, link_opts);
-	struct bpf_insn insns[] = {
-		BPF_MOV64_IMM(BPF_REG_0, 0),
-		BPF_EXIT_INSN(),
-	};
-	int prog_fd, link_fd, err;
-	unsigned long offset = 0;
-
-	prog_fd = bpf_prog_load(BPF_PROG_TYPE_KPROBE, NULL, "GPL",
-				insns, ARRAY_SIZE(insns), &load_opts);
-	if (prog_fd < 0)
-		return -errno;
-
-	/* Creating uprobe in '/' binary should fail with -EBADF. */
-	link_opts.uprobe_multi.path = "/";
-	link_opts.uprobe_multi.offsets = &offset;
-	link_opts.uprobe_multi.cnt = 1;
-
-	link_fd = bpf_link_create(prog_fd, -1, BPF_TRACE_UPROBE_MULTI, &link_opts);
-	err = -errno; /* close() can clobber errno */
-
-	if (link_fd >= 0)
-		close(link_fd);
-	close(prog_fd);
-
-	return link_fd < 0 && err == -EBADF;
-}
-
-static int probe_kern_bpf_cookie(int token_fd)
-{
-	struct bpf_insn insns[] = {
-		BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_attach_cookie),
-		BPF_EXIT_INSN(),
-	};
-	LIBBPF_OPTS(bpf_prog_load_opts, opts,
-		.token_fd = token_fd,
-		.prog_flags = token_fd ? BPF_F_TOKEN_FD : 0,
-	);
-	int ret, insn_cnt = ARRAY_SIZE(insns);
-
-	ret = bpf_prog_load(BPF_PROG_TYPE_TRACEPOINT, NULL, "GPL", insns, insn_cnt, &opts);
-	return probe_fd(ret);
-}
-
-static int probe_kern_btf_enum64(int token_fd)
-{
-	static const char strs[] = "\0enum64";
-	__u32 types[] = {
-		BTF_TYPE_ENC(1, BTF_INFO_ENC(BTF_KIND_ENUM64, 0, 0), 8),
-	};
-
-	return probe_fd(libbpf__load_raw_btf((char *)types, sizeof(types),
-					     strs, sizeof(strs), token_fd));
-}
-
-static int probe_kern_arg_ctx_tag(int token_fd)
-{
-	static const char strs[] = "\0a\0b\0arg:ctx\0";
-	const __u32 types[] = {
-		/* [1] INT */
-		BTF_TYPE_INT_ENC(1 /* "a" */, BTF_INT_SIGNED, 0, 32, 4),
-		/* [2] PTR -> VOID */
-		BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 0),
-		/* [3] FUNC_PROTO `int(void *a)` */
-		BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_FUNC_PROTO, 0, 1), 1),
-		BTF_PARAM_ENC(1 /* "a" */, 2),
-		/* [4] FUNC 'a' -> FUNC_PROTO (main prog) */
-		BTF_TYPE_ENC(1 /* "a" */, BTF_INFO_ENC(BTF_KIND_FUNC, 0, BTF_FUNC_GLOBAL), 3),
-		/* [5] FUNC_PROTO `int(void *b __arg_ctx)` */
-		BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_FUNC_PROTO, 0, 1), 1),
-		BTF_PARAM_ENC(3 /* "b" */, 2),
-		/* [6] FUNC 'b' -> FUNC_PROTO (subprog) */
-		BTF_TYPE_ENC(3 /* "b" */, BTF_INFO_ENC(BTF_KIND_FUNC, 0, BTF_FUNC_GLOBAL), 5),
-		/* [7] DECL_TAG 'arg:ctx' -> func 'b' arg 'b' */
-		BTF_TYPE_DECL_TAG_ENC(5 /* "arg:ctx" */, 6, 0),
-	};
-	const struct bpf_insn insns[] = {
-		/* main prog */
-		BPF_CALL_REL(+1),
-		BPF_EXIT_INSN(),
-		/* global subprog */
-		BPF_EMIT_CALL(BPF_FUNC_get_func_ip), /* needs PTR_TO_CTX */
-		BPF_EXIT_INSN(),
-	};
-	const struct bpf_func_info_min func_infos[] = {
-		{ 0, 4 }, /* main prog -> FUNC 'a' */
-		{ 2, 6 }, /* subprog -> FUNC 'b' */
-	};
-	LIBBPF_OPTS(bpf_prog_load_opts, opts,
-		.token_fd = token_fd,
-		.prog_flags = token_fd ? BPF_F_TOKEN_FD : 0,
-	);
-	int prog_fd, btf_fd, insn_cnt = ARRAY_SIZE(insns);
-
-	btf_fd = libbpf__load_raw_btf((char *)types, sizeof(types), strs, sizeof(strs), token_fd);
-	if (btf_fd < 0)
-		return 0;
-
-	opts.prog_btf_fd = btf_fd;
-	opts.func_info = &func_infos;
-	opts.func_info_cnt = ARRAY_SIZE(func_infos);
-	opts.func_info_rec_size = sizeof(func_infos[0]);
-
-	prog_fd = bpf_prog_load(BPF_PROG_TYPE_KPROBE, "det_arg_ctx",
-				"GPL", insns, insn_cnt, &opts);
-	close(btf_fd);
-
-	return probe_fd(prog_fd);
-}
-
-typedef int (*feature_probe_fn)(int /* token_fd */);
-
-static struct kern_feature_cache feature_cache;
-
-static struct kern_feature_desc {
-	const char *desc;
-	feature_probe_fn probe;
-} feature_probes[__FEAT_CNT] = {
-	[FEAT_PROG_NAME] = {
-		"BPF program name", probe_kern_prog_name,
-	},
-	[FEAT_GLOBAL_DATA] = {
-		"global variables", probe_kern_global_data,
-	},
-	[FEAT_BTF] = {
-		"minimal BTF", probe_kern_btf,
-	},
-	[FEAT_BTF_FUNC] = {
-		"BTF functions", probe_kern_btf_func,
-	},
-	[FEAT_BTF_GLOBAL_FUNC] = {
-		"BTF global function", probe_kern_btf_func_global,
-	},
-	[FEAT_BTF_DATASEC] = {
-		"BTF data section and variable", probe_kern_btf_datasec,
-	},
-	[FEAT_ARRAY_MMAP] = {
-		"ARRAY map mmap()", probe_kern_array_mmap,
-	},
-	[FEAT_EXP_ATTACH_TYPE] = {
-		"BPF_PROG_LOAD expected_attach_type attribute",
-		probe_kern_exp_attach_type,
-	},
-	[FEAT_PROBE_READ_KERN] = {
-		"bpf_probe_read_kernel() helper", probe_kern_probe_read_kernel,
-	},
-	[FEAT_PROG_BIND_MAP] = {
-		"BPF_PROG_BIND_MAP support", probe_prog_bind_map,
-	},
-	[FEAT_MODULE_BTF] = {
-		"module BTF support", probe_module_btf,
-	},
-	[FEAT_BTF_FLOAT] = {
-		"BTF_KIND_FLOAT support", probe_kern_btf_float,
-	},
-	[FEAT_PERF_LINK] = {
-		"BPF perf link support", probe_perf_link,
-	},
-	[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,
-	},
-	[FEAT_MEMCG_ACCOUNT] = {
-		"memcg-based memory accounting", probe_memcg_account,
-	},
-	[FEAT_BPF_COOKIE] = {
-		"BPF cookie support", probe_kern_bpf_cookie,
-	},
-	[FEAT_BTF_ENUM64] = {
-		"BTF_KIND_ENUM64 support", probe_kern_btf_enum64,
-	},
-	[FEAT_SYSCALL_WRAPPER] = {
-		"Kernel using syscall wrapper", probe_kern_syscall_wrapper,
-	},
-	[FEAT_UPROBE_MULTI_LINK] = {
-		"BPF multi-uprobe link support", probe_uprobe_multi_link,
-	},
-	[FEAT_ARG_CTX_TAG] = {
-		"kernel-side __arg_ctx tag", probe_kern_arg_ctx_tag,
-	},
-	[FEAT_BTF_QMARK_DATASEC] = {
-		"BTF DATASEC names starting from '?'", probe_kern_btf_qmark_datasec,
-	},
-};
-
-bool feat_supported(struct kern_feature_cache *cache, enum kern_feature_id feat_id)
-{
-	struct kern_feature_desc *feat = &feature_probes[feat_id];
-	int ret;
-
-	/* assume global feature cache, unless custom one is provided */
-	if (!cache)
-		cache = &feature_cache;
-
-	if (READ_ONCE(cache->res[feat_id]) == FEAT_UNKNOWN) {
-		ret = feat->probe(cache->token_fd);
-		if (ret > 0) {
-			WRITE_ONCE(cache->res[feat_id], FEAT_SUPPORTED);
-		} else if (ret == 0) {
-			WRITE_ONCE(cache->res[feat_id], FEAT_MISSING);
-		} else {
-			pr_warn("Detection of kernel %s support failed: %d\n", feat->desc, ret);
-			WRITE_ONCE(cache->res[feat_id], FEAT_MISSING);
-		}
-	}
-
-	return READ_ONCE(cache->res[feat_id]) == FEAT_SUPPORTED;
-}
--- a/src/libbpf.c
+++ b/src/libbpf.c
--- a/src/libbpf.h
+++ b/src/libbpf.h
@@ -177,29 +177,10 @@ struct bpf_object_open_opts {
 	 * logs through its print callback.
 	 */
 	__u32 kernel_log_level;
-	/* Path to BPF FS mount point to derive BPF token from.
-	 *
-	 * Created BPF token will be used for all bpf() syscall operations
-	 * that accept BPF token (e.g., map creation, BTF and program loads,
-	 * etc) automatically within instantiated BPF object.
-	 *
-	 * If bpf_token_path is not specified, libbpf will consult
-	 * LIBBPF_BPF_TOKEN_PATH environment variable. If set, it will be
-	 * taken as a value of bpf_token_path option and will force libbpf to
-	 * either create BPF token from provided custom BPF FS path, or will
-	 * disable implicit BPF token creation, if envvar value is an empty
-	 * string. bpf_token_path overrides LIBBPF_BPF_TOKEN_PATH, if both are
-	 * set at the same time.
-	 *
-	 * Setting bpf_token_path option to empty string disables libbpf's
-	 * automatic attempt to create BPF token from default BPF FS mount
-	 * point (/sys/fs/bpf), in case this default behavior is undesirable.
-	 */
-	const char *bpf_token_path;

 	size_t :0;
 };
-#define bpf_object_open_opts__last_field bpf_token_path
+#define bpf_object_open_opts__last_field kernel_log_level

 /**
 * @brief **bpf_object__open()** creates a bpf_object by opening
@@ -760,20 +741,9 @@ bpf_program__attach_tracepoint_opts(const struct bpf_program *prog,
 				    const char *tp_name,
 				    const struct bpf_tracepoint_opts *opts);

-struct bpf_raw_tracepoint_opts {
-	size_t sz; /* size of this struct for forward/backward compatibility */
-	__u64 cookie;
-	size_t :0;
-};
-#define bpf_raw_tracepoint_opts__last_field cookie
-
 LIBBPF_API struct bpf_link *
 bpf_program__attach_raw_tracepoint(const struct bpf_program *prog,
 				   const char *tp_name);
-LIBBPF_API struct bpf_link *
-bpf_program__attach_raw_tracepoint_opts(const struct bpf_program *prog,
-					const char *tp_name,
-					struct bpf_raw_tracepoint_opts *opts);

 struct bpf_trace_opts {
 	/* size of this struct, for forward/backward compatibility */
@@ -1025,7 +995,7 @@ LIBBPF_API int bpf_map__set_map_extra(struct bpf_map *map, __u64 map_extra);

 LIBBPF_API int bpf_map__set_initial_value(struct bpf_map *map,
 					  const void *data, size_t size);
-LIBBPF_API void *bpf_map__initial_value(const struct bpf_map *map, size_t *psize);
+LIBBPF_API void *bpf_map__initial_value(struct bpf_map *map, size_t *psize);

 /**
 * @brief **bpf_map__is_internal()** tells the caller whether or not the
--- a/src/libbpf.map
+++ b/src/libbpf.map
@@ -245,6 +245,7 @@ LIBBPF_0.3.0 {
 		btf__parse_raw_split;
 		btf__parse_split;
 		btf__new_empty_split;
+		btf__new_split;
 		ring_buffer__epoll_fd;
 } LIBBPF_0.2.0;

@@ -325,6 +326,7 @@ LIBBPF_0.7.0 {
 		bpf_xdp_detach;
 		bpf_xdp_query;
 		bpf_xdp_query_id;
+		btf_ext__raw_data;
 		libbpf_probe_bpf_helper;
 		libbpf_probe_bpf_map_type;
 		libbpf_probe_bpf_prog_type;
@@ -409,10 +411,4 @@ LIBBPF_1.3.0 {
 } LIBBPF_1.2.0;

 LIBBPF_1.4.0 {
-	global:
-		bpf_program__attach_raw_tracepoint_opts;
-		bpf_raw_tracepoint_open_opts;
-		bpf_token_create;
-		btf__new_split;
-		btf_ext__raw_data;
 } LIBBPF_1.3.0;
--- a/src/libbpf_internal.h
+++ b/src/libbpf_internal.h
@@ -15,24 +15,9 @@
 #include <linux/err.h>
 #include <fcntl.h>
 #include <unistd.h>
-#include <sys/syscall.h>
 #include <libelf.h>
 #include "relo_core.h"

-/* Android's libc doesn't support AT_EACCESS in faccessat() implementation
- * ([0]), and just returns -EINVAL even if file exists and is accessible.
- * See [1] for issues caused by this.
- *
- * So just redefine it to 0 on Android.
- *
- * [0] https://android.googlesource.com/platform/bionic/+/refs/heads/android13-release/libc/bionic/faccessat.cpp#50
- * [1] https://github.com/libbpf/libbpf-bootstrap/issues/250#issuecomment-1911324250
- */
-#ifdef __ANDROID__
-#undef AT_EACCESS
-#define AT_EACCESS 0
-#endif
-
 /* make sure libbpf doesn't use kernel-only integer typedefs */
 #pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64

@@ -372,39 +357,18 @@ enum kern_feature_id {
 	FEAT_SYSCALL_WRAPPER,
 	/* BPF multi-uprobe link support */
 	FEAT_UPROBE_MULTI_LINK,
-	/* Kernel supports arg:ctx tag (__arg_ctx) for global subprogs natively */
-	FEAT_ARG_CTX_TAG,
-	/* Kernel supports '?' at the front of datasec names */
-	FEAT_BTF_QMARK_DATASEC,
 	__FEAT_CNT,
 };

-enum kern_feature_result {
-	FEAT_UNKNOWN = 0,
-	FEAT_SUPPORTED = 1,
-	FEAT_MISSING = 2,
-};
-
-struct kern_feature_cache {
-	enum kern_feature_result res[__FEAT_CNT];
-	int token_fd;
-};
-
-bool feat_supported(struct kern_feature_cache *cache, enum kern_feature_id feat_id);
+int probe_memcg_account(void);
 bool kernel_supports(const struct bpf_object *obj, enum kern_feature_id feat_id);
-
-int probe_kern_syscall_wrapper(int token_fd);
-int probe_memcg_account(int token_fd);
 int bump_rlimit_memlock(void);

 int parse_cpu_mask_str(const char *s, bool **mask, int *mask_sz);
 int parse_cpu_mask_file(const char *fcpu, bool **mask, int *mask_sz);
 int libbpf__load_raw_btf(const char *raw_types, size_t types_len,
-			 const char *str_sec, size_t str_len,
-			 int token_fd);
-int btf_load_into_kernel(struct btf *btf,
-			 char *log_buf, size_t log_sz, __u32 log_level,
-			 int token_fd);
+			 const char *str_sec, size_t str_len);
+int btf_load_into_kernel(struct btf *btf, char *log_buf, size_t log_sz, __u32 log_level);

 struct btf *btf_get_from_fd(int btf_fd, struct btf *base_btf);
 void btf_get_kernel_prefix_kind(enum bpf_attach_type attach_type,
@@ -568,17 +532,6 @@ static inline bool is_ldimm64_insn(struct bpf_insn *insn)
 	return insn->code == (BPF_LD | BPF_IMM | BPF_DW);
 }

-/* Unconditionally dup FD, ensuring it doesn't use [0, 2] range.
- * Original FD is not closed or altered in any other way.
- * Preserves original FD value, if it's invalid (negative).
- */
-static inline int dup_good_fd(int fd)
-{
-	if (fd < 0)
-		return fd;
-	return fcntl(fd, F_DUPFD_CLOEXEC, 3);
-}
-
 /* if fd is stdin, stdout, or stderr, dup to a fd greater than 2
 * Takes ownership of the fd passed in, and closes it if calling
 * fcntl(fd, F_DUPFD_CLOEXEC, 3).
@@ -590,7 +543,7 @@ static inline int ensure_good_fd(int fd)
 	if (fd < 0)
 		return fd;
 	if (fd < 3) {
-		fd = dup_good_fd(fd);
+		fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
 		saved_errno = errno;
 		close(old_fd);
 		errno = saved_errno;
@@ -602,15 +555,6 @@ static inline int ensure_good_fd(int fd)
 	return fd;
 }

-static inline int sys_dup2(int oldfd, int newfd)
-{
-#ifdef __NR_dup2
-	return syscall(__NR_dup2, oldfd, newfd);
-#else
-	return syscall(__NR_dup3, oldfd, newfd, 0);
-#endif
-}
-
 /* Point *fixed_fd* to the same file that *tmp_fd* points to.
 * Regardless of success, *tmp_fd* is closed.
 * Whatever *fixed_fd* pointed to is closed silently.
@@ -619,7 +563,7 @@ static inline int reuse_fd(int fixed_fd, int tmp_fd)
 {
 	int err;

-	err = sys_dup2(tmp_fd, fixed_fd);
+	err = dup2(tmp_fd, fixed_fd);
 	err = err < 0 ? -errno : 0;
 	close(tmp_fd); /* clean up temporary FD */
 	return err;
@@ -669,6 +613,4 @@ int elf_resolve_syms_offsets(const char *binary_path, int cnt,
 int elf_resolve_pattern_offsets(const char *binary_path, const char *pattern,
 				 unsigned long **poffsets, size_t *pcnt);

-int probe_fd(int fd);
-
 #endif /* __LIBBPF_LIBBPF_INTERNAL_H */
--- a/src/libbpf_probes.c
+++ b/src/libbpf_probes.c
@@ -74,6 +74,9 @@ static __u32 get_debian_kernel_version(struct utsname *info)
 	if (sscanf(p, "Debian %u.%u.%u", &major, &minor, &patch) != 3)
 		return 0;

+        if (major == 4 && minor == 19 && patch > 255)
+                return KERNEL_VERSION(major, minor, 255);
+
 	return KERNEL_VERSION(major, minor, patch);
 }

@@ -97,9 +100,6 @@ __u32 get_kernel_version(void)
 	if (sscanf(info.release, "%u.%u.%u", &major, &minor, &patch) != 3)
 		return 0;

-	if (major == 4 && minor == 19 && patch > 255)
-		return KERNEL_VERSION(major, minor, 255);
-
 	return KERNEL_VERSION(major, minor, patch);
 }

@@ -222,8 +222,7 @@ int libbpf_probe_bpf_prog_type(enum bpf_prog_type prog_type, const void *opts)
 }

 int libbpf__load_raw_btf(const char *raw_types, size_t types_len,
-			 const char *str_sec, size_t str_len,
-			 int token_fd)
+			 const char *str_sec, size_t str_len)
 {
 	struct btf_header hdr = {
 		.magic = BTF_MAGIC,
@@ -233,10 +232,6 @@ int libbpf__load_raw_btf(const char *raw_types, size_t types_len,
 		.str_off = types_len,
 		.str_len = str_len,
 	};
-	LIBBPF_OPTS(bpf_btf_load_opts, opts,
-		.token_fd = token_fd,
-		.btf_flags = token_fd ? BPF_F_TOKEN_FD : 0,
-	);
 	int btf_fd, btf_len;
 	__u8 *raw_btf;

@@ -249,7 +244,7 @@ int libbpf__load_raw_btf(const char *raw_types, size_t types_len,
 	memcpy(raw_btf + hdr.hdr_len, raw_types, hdr.type_len);
 	memcpy(raw_btf + hdr.hdr_len + hdr.type_len, str_sec, hdr.str_len);

-	btf_fd = bpf_btf_load(raw_btf, btf_len, &opts);
+	btf_fd = bpf_btf_load(raw_btf, btf_len, NULL);

 	free(raw_btf);
 	return btf_fd;
@@ -279,7 +274,7 @@ static int load_local_storage_btf(void)
 	};

 	return libbpf__load_raw_btf((char *)types, sizeof(types),
-				     strs, sizeof(strs), 0);
+				     strs, sizeof(strs));
 }

 static int probe_map_create(enum bpf_map_type map_type)
@@ -334,20 +329,12 @@ static int probe_map_create(enum bpf_map_type map_type)
 	case BPF_MAP_TYPE_STRUCT_OPS:
 		/* we'll get -ENOTSUPP for invalid BTF type ID for struct_ops */
 		opts.btf_vmlinux_value_type_id = 1;
-		opts.value_type_btf_obj_fd = -1;
 		exp_err = -524; /* -ENOTSUPP */
 		break;
 	case BPF_MAP_TYPE_BLOOM_FILTER:
 		key_size = 0;
 		max_entries = 1;
 		break;
-	case BPF_MAP_TYPE_ARENA:
-		key_size	= 0;
-		value_size	= 0;
-		max_entries	= 1; /* one page */
-		opts.map_extra	= 0; /* can mmap() at any address */
-		opts.map_flags	= BPF_F_MMAPABLE;
-		break;
 	case BPF_MAP_TYPE_HASH:
 	case BPF_MAP_TYPE_ARRAY:
 	case BPF_MAP_TYPE_PROG_ARRAY:
--- a/src/linker.c
+++ b/src/linker.c
@@ -2732,7 +2732,7 @@ static int finalize_btf(struct bpf_linker *linker)

 	/* Emit .BTF.ext section */
 	if (linker->btf_ext) {
-		raw_data = btf_ext__raw_data(linker->btf_ext, &raw_sz);
+		raw_data = btf_ext__get_raw_data(linker->btf_ext, &raw_sz);
 		if (!raw_data)
 			return -ENOMEM;

--- a/src/netlink.c
+++ b/src/netlink.c
@@ -496,8 +496,8 @@ int bpf_xdp_query(int ifindex, int xdp_flags, struct bpf_xdp_query_opts *opts)
 	if (err)
 		return libbpf_err(err);

-	OPTS_SET(opts, feature_flags, md.flags);
-	OPTS_SET(opts, xdp_zc_max_segs, md.xdp_zc_max_segs);
+	opts->feature_flags = md.flags;
+	opts->xdp_zc_max_segs = md.xdp_zc_max_segs;

 skip_feature_flags:
 	return 0;
--- a/src/str_error.h
+++ b/src/str_error.h
@@ -2,8 +2,5 @@
 #ifndef __LIBBPF_STR_ERROR_H
 #define __LIBBPF_STR_ERROR_H

-#define STRERR_BUFSIZE  128
-
 char *libbpf_strerror_r(int err, char *dst, int len);
-
 #endif /* __LIBBPF_STR_ERROR_H */