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1250 lines
33 KiB
1250 lines
33 KiB
// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) |
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|
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/* |
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* common eBPF ELF operations. |
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* |
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* Copyright (C) 2013-2015 Alexei Starovoitov <[email protected]> |
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* Copyright (C) 2015 Wang Nan <[email protected]> |
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* Copyright (C) 2015 Huawei Inc. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; |
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* version 2.1 of the License (not later!) |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this program; if not, see <http://www.gnu.org/licenses> |
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*/ |
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|
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#include <stdlib.h> |
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#include <string.h> |
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#include <memory.h> |
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#include <unistd.h> |
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#include <asm/unistd.h> |
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#include <errno.h> |
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#include <linux/bpf.h> |
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#include <linux/filter.h> |
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#include <limits.h> |
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#include <sys/resource.h> |
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#include "bpf.h" |
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#include "libbpf.h" |
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#include "libbpf_internal.h" |
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|
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/* |
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* When building perf, unistd.h is overridden. __NR_bpf is |
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* required to be defined explicitly. |
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*/ |
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#ifndef __NR_bpf |
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# if defined(__i386__) |
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# define __NR_bpf 357 |
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# elif defined(__x86_64__) |
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# define __NR_bpf 321 |
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# elif defined(__aarch64__) |
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# define __NR_bpf 280 |
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# elif defined(__sparc__) |
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# define __NR_bpf 349 |
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# elif defined(__s390__) |
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# define __NR_bpf 351 |
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# elif defined(__arc__) |
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# define __NR_bpf 280 |
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# elif defined(__mips__) && defined(_ABIO32) |
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# define __NR_bpf 4355 |
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# elif defined(__mips__) && defined(_ABIN32) |
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# define __NR_bpf 6319 |
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# elif defined(__mips__) && defined(_ABI64) |
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# define __NR_bpf 5315 |
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# else |
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# error __NR_bpf not defined. libbpf does not support your arch. |
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# endif |
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#endif |
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|
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static inline __u64 ptr_to_u64(const void *ptr) |
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{ |
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return (__u64) (unsigned long) ptr; |
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} |
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|
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static inline int sys_bpf(enum bpf_cmd cmd, union bpf_attr *attr, |
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unsigned int size) |
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{ |
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return syscall(__NR_bpf, cmd, attr, size); |
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} |
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|
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static inline int sys_bpf_fd(enum bpf_cmd cmd, union bpf_attr *attr, |
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unsigned int size) |
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{ |
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int fd; |
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|
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fd = sys_bpf(cmd, attr, size); |
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return ensure_good_fd(fd); |
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} |
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|
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#define PROG_LOAD_ATTEMPTS 5 |
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|
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static inline int sys_bpf_prog_load(union bpf_attr *attr, unsigned int size, int attempts) |
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{ |
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int fd; |
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|
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do { |
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fd = sys_bpf_fd(BPF_PROG_LOAD, attr, size); |
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} while (fd < 0 && errno == EAGAIN && --attempts > 0); |
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|
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return fd; |
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} |
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|
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/* Probe whether kernel switched from memlock-based (RLIMIT_MEMLOCK) to |
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* memcg-based memory accounting for BPF maps and progs. This was done in [0]. |
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* We use the support for bpf_ktime_get_coarse_ns() helper, which was added in |
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* the same 5.11 Linux release ([1]), to detect memcg-based accounting for BPF. |
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* |
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* [0] https://lore.kernel.org/bpf/[email protected]/ |
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* [1] d05512618056 ("bpf: Add bpf_ktime_get_coarse_ns helper") |
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*/ |
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int probe_memcg_account(void) |
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{ |
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const size_t prog_load_attr_sz = offsetofend(union bpf_attr, attach_btf_obj_fd); |
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struct bpf_insn insns[] = { |
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BPF_EMIT_CALL(BPF_FUNC_ktime_get_coarse_ns), |
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BPF_EXIT_INSN(), |
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}; |
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size_t insn_cnt = sizeof(insns) / sizeof(insns[0]); |
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union bpf_attr attr; |
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int prog_fd; |
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|
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/* attempt loading freplace trying to use custom BTF */ |
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memset(&attr, 0, prog_load_attr_sz); |
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attr.prog_type = BPF_PROG_TYPE_SOCKET_FILTER; |
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attr.insns = ptr_to_u64(insns); |
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attr.insn_cnt = insn_cnt; |
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attr.license = ptr_to_u64("GPL"); |
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|
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prog_fd = sys_bpf_fd(BPF_PROG_LOAD, &attr, prog_load_attr_sz); |
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if (prog_fd >= 0) { |
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close(prog_fd); |
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return 1; |
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} |
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return 0; |
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} |
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|
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static bool memlock_bumped; |
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static rlim_t memlock_rlim = RLIM_INFINITY; |
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|
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int libbpf_set_memlock_rlim(size_t memlock_bytes) |
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{ |
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if (memlock_bumped) |
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return libbpf_err(-EBUSY); |
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|
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memlock_rlim = memlock_bytes; |
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return 0; |
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} |
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|
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int bump_rlimit_memlock(void) |
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{ |
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struct rlimit rlim; |
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|
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/* this the default in libbpf 1.0, but for now user has to opt-in explicitly */ |
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if (!(libbpf_mode & LIBBPF_STRICT_AUTO_RLIMIT_MEMLOCK)) |
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return 0; |
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|
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/* if kernel supports memcg-based accounting, skip bumping RLIMIT_MEMLOCK */ |
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if (memlock_bumped || kernel_supports(NULL, FEAT_MEMCG_ACCOUNT)) |
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return 0; |
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|
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memlock_bumped = true; |
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|
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/* zero memlock_rlim_max disables auto-bumping RLIMIT_MEMLOCK */ |
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if (memlock_rlim == 0) |
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return 0; |
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|
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rlim.rlim_cur = rlim.rlim_max = memlock_rlim; |
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if (setrlimit(RLIMIT_MEMLOCK, &rlim)) |
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return -errno; |
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|
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return 0; |
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} |
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|
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int bpf_map_create(enum bpf_map_type map_type, |
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const char *map_name, |
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__u32 key_size, |
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__u32 value_size, |
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__u32 max_entries, |
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const struct bpf_map_create_opts *opts) |
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{ |
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const size_t attr_sz = offsetofend(union bpf_attr, map_extra); |
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union bpf_attr attr; |
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int fd; |
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|
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bump_rlimit_memlock(); |
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|
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memset(&attr, 0, attr_sz); |
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|
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if (!OPTS_VALID(opts, bpf_map_create_opts)) |
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return libbpf_err(-EINVAL); |
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|
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attr.map_type = map_type; |
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if (map_name) |
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libbpf_strlcpy(attr.map_name, map_name, sizeof(attr.map_name)); |
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attr.key_size = key_size; |
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attr.value_size = value_size; |
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attr.max_entries = max_entries; |
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|
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attr.btf_fd = OPTS_GET(opts, btf_fd, 0); |
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attr.btf_key_type_id = OPTS_GET(opts, btf_key_type_id, 0); |
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attr.btf_value_type_id = OPTS_GET(opts, btf_value_type_id, 0); |
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attr.btf_vmlinux_value_type_id = OPTS_GET(opts, btf_vmlinux_value_type_id, 0); |
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|
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attr.inner_map_fd = OPTS_GET(opts, inner_map_fd, 0); |
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attr.map_flags = OPTS_GET(opts, map_flags, 0); |
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attr.map_extra = OPTS_GET(opts, map_extra, 0); |
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attr.numa_node = OPTS_GET(opts, numa_node, 0); |
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attr.map_ifindex = OPTS_GET(opts, map_ifindex, 0); |
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|
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fd = sys_bpf_fd(BPF_MAP_CREATE, &attr, attr_sz); |
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return libbpf_err_errno(fd); |
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} |
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|
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int bpf_create_map_xattr(const struct bpf_create_map_attr *create_attr) |
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{ |
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LIBBPF_OPTS(bpf_map_create_opts, p); |
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|
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p.map_flags = create_attr->map_flags; |
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p.numa_node = create_attr->numa_node; |
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p.btf_fd = create_attr->btf_fd; |
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p.btf_key_type_id = create_attr->btf_key_type_id; |
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p.btf_value_type_id = create_attr->btf_value_type_id; |
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p.map_ifindex = create_attr->map_ifindex; |
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if (create_attr->map_type == BPF_MAP_TYPE_STRUCT_OPS) |
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p.btf_vmlinux_value_type_id = create_attr->btf_vmlinux_value_type_id; |
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else |
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p.inner_map_fd = create_attr->inner_map_fd; |
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|
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return bpf_map_create(create_attr->map_type, create_attr->name, |
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create_attr->key_size, create_attr->value_size, |
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create_attr->max_entries, &p); |
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} |
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|
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int bpf_create_map_node(enum bpf_map_type map_type, const char *name, |
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int key_size, int value_size, int max_entries, |
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__u32 map_flags, int node) |
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{ |
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LIBBPF_OPTS(bpf_map_create_opts, opts); |
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|
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opts.map_flags = map_flags; |
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if (node >= 0) { |
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opts.numa_node = node; |
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opts.map_flags |= BPF_F_NUMA_NODE; |
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} |
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return bpf_map_create(map_type, name, key_size, value_size, max_entries, &opts); |
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} |
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|
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int bpf_create_map(enum bpf_map_type map_type, int key_size, |
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int value_size, int max_entries, __u32 map_flags) |
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{ |
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LIBBPF_OPTS(bpf_map_create_opts, opts, .map_flags = map_flags); |
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|
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return bpf_map_create(map_type, NULL, key_size, value_size, max_entries, &opts); |
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} |
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|
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int bpf_create_map_name(enum bpf_map_type map_type, const char *name, |
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int key_size, int value_size, int max_entries, |
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__u32 map_flags) |
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{ |
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LIBBPF_OPTS(bpf_map_create_opts, opts, .map_flags = map_flags); |
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|
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return bpf_map_create(map_type, name, key_size, value_size, max_entries, &opts); |
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} |
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|
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int bpf_create_map_in_map_node(enum bpf_map_type map_type, const char *name, |
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int key_size, int inner_map_fd, int max_entries, |
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__u32 map_flags, int node) |
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{ |
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LIBBPF_OPTS(bpf_map_create_opts, opts); |
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|
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opts.inner_map_fd = inner_map_fd; |
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opts.map_flags = map_flags; |
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if (node >= 0) { |
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opts.map_flags |= BPF_F_NUMA_NODE; |
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opts.numa_node = node; |
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} |
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|
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return bpf_map_create(map_type, name, key_size, 4, max_entries, &opts); |
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} |
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|
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int bpf_create_map_in_map(enum bpf_map_type map_type, const char *name, |
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int key_size, int inner_map_fd, int max_entries, |
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__u32 map_flags) |
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{ |
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LIBBPF_OPTS(bpf_map_create_opts, opts, |
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.inner_map_fd = inner_map_fd, |
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.map_flags = map_flags, |
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); |
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|
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return bpf_map_create(map_type, name, key_size, 4, max_entries, &opts); |
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} |
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|
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static void * |
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alloc_zero_tailing_info(const void *orecord, __u32 cnt, |
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__u32 actual_rec_size, __u32 expected_rec_size) |
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{ |
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__u64 info_len = (__u64)actual_rec_size * cnt; |
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void *info, *nrecord; |
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int i; |
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|
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info = malloc(info_len); |
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if (!info) |
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return NULL; |
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|
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/* zero out bytes kernel does not understand */ |
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nrecord = info; |
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for (i = 0; i < cnt; i++) { |
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memcpy(nrecord, orecord, expected_rec_size); |
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memset(nrecord + expected_rec_size, 0, |
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actual_rec_size - expected_rec_size); |
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orecord += actual_rec_size; |
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nrecord += actual_rec_size; |
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} |
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|
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return info; |
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} |
|
|
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DEFAULT_VERSION(bpf_prog_load_v0_6_0, bpf_prog_load, LIBBPF_0.6.0) |
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int bpf_prog_load_v0_6_0(enum bpf_prog_type prog_type, |
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const char *prog_name, const char *license, |
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const struct bpf_insn *insns, size_t insn_cnt, |
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const struct bpf_prog_load_opts *opts) |
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{ |
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void *finfo = NULL, *linfo = NULL; |
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const char *func_info, *line_info; |
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__u32 log_size, log_level, attach_prog_fd, attach_btf_obj_fd; |
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__u32 func_info_rec_size, line_info_rec_size; |
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int fd, attempts; |
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union bpf_attr attr; |
|
char *log_buf; |
|
|
|
bump_rlimit_memlock(); |
|
|
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if (!OPTS_VALID(opts, bpf_prog_load_opts)) |
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return libbpf_err(-EINVAL); |
|
|
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attempts = OPTS_GET(opts, attempts, 0); |
|
if (attempts < 0) |
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return libbpf_err(-EINVAL); |
|
if (attempts == 0) |
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attempts = PROG_LOAD_ATTEMPTS; |
|
|
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memset(&attr, 0, sizeof(attr)); |
|
|
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attr.prog_type = prog_type; |
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attr.expected_attach_type = OPTS_GET(opts, expected_attach_type, 0); |
|
|
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attr.prog_btf_fd = OPTS_GET(opts, prog_btf_fd, 0); |
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attr.prog_flags = OPTS_GET(opts, prog_flags, 0); |
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attr.prog_ifindex = OPTS_GET(opts, prog_ifindex, 0); |
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attr.kern_version = OPTS_GET(opts, kern_version, 0); |
|
|
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if (prog_name) |
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libbpf_strlcpy(attr.prog_name, prog_name, sizeof(attr.prog_name)); |
|
attr.license = ptr_to_u64(license); |
|
|
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if (insn_cnt > UINT_MAX) |
|
return libbpf_err(-E2BIG); |
|
|
|
attr.insns = ptr_to_u64(insns); |
|
attr.insn_cnt = (__u32)insn_cnt; |
|
|
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attach_prog_fd = OPTS_GET(opts, attach_prog_fd, 0); |
|
attach_btf_obj_fd = OPTS_GET(opts, attach_btf_obj_fd, 0); |
|
|
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if (attach_prog_fd && attach_btf_obj_fd) |
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return libbpf_err(-EINVAL); |
|
|
|
attr.attach_btf_id = OPTS_GET(opts, attach_btf_id, 0); |
|
if (attach_prog_fd) |
|
attr.attach_prog_fd = attach_prog_fd; |
|
else |
|
attr.attach_btf_obj_fd = attach_btf_obj_fd; |
|
|
|
log_buf = OPTS_GET(opts, log_buf, NULL); |
|
log_size = OPTS_GET(opts, log_size, 0); |
|
log_level = OPTS_GET(opts, log_level, 0); |
|
|
|
if (!!log_buf != !!log_size) |
|
return libbpf_err(-EINVAL); |
|
if (log_level > (4 | 2 | 1)) |
|
return libbpf_err(-EINVAL); |
|
if (log_level && !log_buf) |
|
return libbpf_err(-EINVAL); |
|
|
|
func_info_rec_size = OPTS_GET(opts, func_info_rec_size, 0); |
|
func_info = OPTS_GET(opts, func_info, NULL); |
|
attr.func_info_rec_size = func_info_rec_size; |
|
attr.func_info = ptr_to_u64(func_info); |
|
attr.func_info_cnt = OPTS_GET(opts, func_info_cnt, 0); |
|
|
|
line_info_rec_size = OPTS_GET(opts, line_info_rec_size, 0); |
|
line_info = OPTS_GET(opts, line_info, NULL); |
|
attr.line_info_rec_size = line_info_rec_size; |
|
attr.line_info = ptr_to_u64(line_info); |
|
attr.line_info_cnt = OPTS_GET(opts, line_info_cnt, 0); |
|
|
|
attr.fd_array = ptr_to_u64(OPTS_GET(opts, fd_array, NULL)); |
|
|
|
if (log_level) { |
|
attr.log_buf = ptr_to_u64(log_buf); |
|
attr.log_size = log_size; |
|
attr.log_level = log_level; |
|
} |
|
|
|
fd = sys_bpf_prog_load(&attr, sizeof(attr), attempts); |
|
if (fd >= 0) |
|
return fd; |
|
|
|
/* After bpf_prog_load, the kernel may modify certain attributes |
|
* to give user space a hint how to deal with loading failure. |
|
* Check to see whether we can make some changes and load again. |
|
*/ |
|
while (errno == E2BIG && (!finfo || !linfo)) { |
|
if (!finfo && attr.func_info_cnt && |
|
attr.func_info_rec_size < func_info_rec_size) { |
|
/* try with corrected func info records */ |
|
finfo = alloc_zero_tailing_info(func_info, |
|
attr.func_info_cnt, |
|
func_info_rec_size, |
|
attr.func_info_rec_size); |
|
if (!finfo) { |
|
errno = E2BIG; |
|
goto done; |
|
} |
|
|
|
attr.func_info = ptr_to_u64(finfo); |
|
attr.func_info_rec_size = func_info_rec_size; |
|
} else if (!linfo && attr.line_info_cnt && |
|
attr.line_info_rec_size < line_info_rec_size) { |
|
linfo = alloc_zero_tailing_info(line_info, |
|
attr.line_info_cnt, |
|
line_info_rec_size, |
|
attr.line_info_rec_size); |
|
if (!linfo) { |
|
errno = E2BIG; |
|
goto done; |
|
} |
|
|
|
attr.line_info = ptr_to_u64(linfo); |
|
attr.line_info_rec_size = line_info_rec_size; |
|
} else { |
|
break; |
|
} |
|
|
|
fd = sys_bpf_prog_load(&attr, sizeof(attr), attempts); |
|
if (fd >= 0) |
|
goto done; |
|
} |
|
|
|
if (log_level == 0 && log_buf) { |
|
/* log_level == 0 with non-NULL log_buf requires retrying on error |
|
* with log_level == 1 and log_buf/log_buf_size set, to get details of |
|
* failure |
|
*/ |
|
attr.log_buf = ptr_to_u64(log_buf); |
|
attr.log_size = log_size; |
|
attr.log_level = 1; |
|
|
|
fd = sys_bpf_prog_load(&attr, sizeof(attr), attempts); |
|
} |
|
done: |
|
/* free() doesn't affect errno, so we don't need to restore it */ |
|
free(finfo); |
|
free(linfo); |
|
return libbpf_err_errno(fd); |
|
} |
|
|
|
__attribute__((alias("bpf_load_program_xattr2"))) |
|
int bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr, |
|
char *log_buf, size_t log_buf_sz); |
|
|
|
static int bpf_load_program_xattr2(const struct bpf_load_program_attr *load_attr, |
|
char *log_buf, size_t log_buf_sz) |
|
{ |
|
LIBBPF_OPTS(bpf_prog_load_opts, p); |
|
|
|
if (!load_attr || !log_buf != !log_buf_sz) |
|
return libbpf_err(-EINVAL); |
|
|
|
p.expected_attach_type = load_attr->expected_attach_type; |
|
switch (load_attr->prog_type) { |
|
case BPF_PROG_TYPE_STRUCT_OPS: |
|
case BPF_PROG_TYPE_LSM: |
|
p.attach_btf_id = load_attr->attach_btf_id; |
|
break; |
|
case BPF_PROG_TYPE_TRACING: |
|
case BPF_PROG_TYPE_EXT: |
|
p.attach_btf_id = load_attr->attach_btf_id; |
|
p.attach_prog_fd = load_attr->attach_prog_fd; |
|
break; |
|
default: |
|
p.prog_ifindex = load_attr->prog_ifindex; |
|
p.kern_version = load_attr->kern_version; |
|
} |
|
p.log_level = load_attr->log_level; |
|
p.log_buf = log_buf; |
|
p.log_size = log_buf_sz; |
|
p.prog_btf_fd = load_attr->prog_btf_fd; |
|
p.func_info_rec_size = load_attr->func_info_rec_size; |
|
p.func_info_cnt = load_attr->func_info_cnt; |
|
p.func_info = load_attr->func_info; |
|
p.line_info_rec_size = load_attr->line_info_rec_size; |
|
p.line_info_cnt = load_attr->line_info_cnt; |
|
p.line_info = load_attr->line_info; |
|
p.prog_flags = load_attr->prog_flags; |
|
|
|
return bpf_prog_load(load_attr->prog_type, load_attr->name, load_attr->license, |
|
load_attr->insns, load_attr->insns_cnt, &p); |
|
} |
|
|
|
int bpf_load_program(enum bpf_prog_type type, const struct bpf_insn *insns, |
|
size_t insns_cnt, const char *license, |
|
__u32 kern_version, char *log_buf, |
|
size_t log_buf_sz) |
|
{ |
|
struct bpf_load_program_attr load_attr; |
|
|
|
memset(&load_attr, 0, sizeof(struct bpf_load_program_attr)); |
|
load_attr.prog_type = type; |
|
load_attr.expected_attach_type = 0; |
|
load_attr.name = NULL; |
|
load_attr.insns = insns; |
|
load_attr.insns_cnt = insns_cnt; |
|
load_attr.license = license; |
|
load_attr.kern_version = kern_version; |
|
|
|
return bpf_load_program_xattr2(&load_attr, log_buf, log_buf_sz); |
|
} |
|
|
|
int bpf_verify_program(enum bpf_prog_type type, const struct bpf_insn *insns, |
|
size_t insns_cnt, __u32 prog_flags, const char *license, |
|
__u32 kern_version, char *log_buf, size_t log_buf_sz, |
|
int log_level) |
|
{ |
|
union bpf_attr attr; |
|
int fd; |
|
|
|
bump_rlimit_memlock(); |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.prog_type = type; |
|
attr.insn_cnt = (__u32)insns_cnt; |
|
attr.insns = ptr_to_u64(insns); |
|
attr.license = ptr_to_u64(license); |
|
attr.log_buf = ptr_to_u64(log_buf); |
|
attr.log_size = log_buf_sz; |
|
attr.log_level = log_level; |
|
log_buf[0] = 0; |
|
attr.kern_version = kern_version; |
|
attr.prog_flags = prog_flags; |
|
|
|
fd = sys_bpf_prog_load(&attr, sizeof(attr), PROG_LOAD_ATTEMPTS); |
|
return libbpf_err_errno(fd); |
|
} |
|
|
|
int bpf_map_update_elem(int fd, const void *key, const void *value, |
|
__u64 flags) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.map_fd = fd; |
|
attr.key = ptr_to_u64(key); |
|
attr.value = ptr_to_u64(value); |
|
attr.flags = flags; |
|
|
|
ret = sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr)); |
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
int bpf_map_lookup_elem(int fd, const void *key, void *value) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.map_fd = fd; |
|
attr.key = ptr_to_u64(key); |
|
attr.value = ptr_to_u64(value); |
|
|
|
ret = sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr)); |
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
int bpf_map_lookup_elem_flags(int fd, const void *key, void *value, __u64 flags) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.map_fd = fd; |
|
attr.key = ptr_to_u64(key); |
|
attr.value = ptr_to_u64(value); |
|
attr.flags = flags; |
|
|
|
ret = sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr)); |
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
int bpf_map_lookup_and_delete_elem(int fd, const void *key, void *value) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.map_fd = fd; |
|
attr.key = ptr_to_u64(key); |
|
attr.value = ptr_to_u64(value); |
|
|
|
ret = sys_bpf(BPF_MAP_LOOKUP_AND_DELETE_ELEM, &attr, sizeof(attr)); |
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
int bpf_map_lookup_and_delete_elem_flags(int fd, const void *key, void *value, __u64 flags) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.map_fd = fd; |
|
attr.key = ptr_to_u64(key); |
|
attr.value = ptr_to_u64(value); |
|
attr.flags = flags; |
|
|
|
ret = sys_bpf(BPF_MAP_LOOKUP_AND_DELETE_ELEM, &attr, sizeof(attr)); |
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
int bpf_map_delete_elem(int fd, const void *key) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.map_fd = fd; |
|
attr.key = ptr_to_u64(key); |
|
|
|
ret = sys_bpf(BPF_MAP_DELETE_ELEM, &attr, sizeof(attr)); |
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
int bpf_map_get_next_key(int fd, const void *key, void *next_key) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.map_fd = fd; |
|
attr.key = ptr_to_u64(key); |
|
attr.next_key = ptr_to_u64(next_key); |
|
|
|
ret = sys_bpf(BPF_MAP_GET_NEXT_KEY, &attr, sizeof(attr)); |
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
int bpf_map_freeze(int fd) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.map_fd = fd; |
|
|
|
ret = sys_bpf(BPF_MAP_FREEZE, &attr, sizeof(attr)); |
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
static int bpf_map_batch_common(int cmd, int fd, void *in_batch, |
|
void *out_batch, void *keys, void *values, |
|
__u32 *count, |
|
const struct bpf_map_batch_opts *opts) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
if (!OPTS_VALID(opts, bpf_map_batch_opts)) |
|
return libbpf_err(-EINVAL); |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.batch.map_fd = fd; |
|
attr.batch.in_batch = ptr_to_u64(in_batch); |
|
attr.batch.out_batch = ptr_to_u64(out_batch); |
|
attr.batch.keys = ptr_to_u64(keys); |
|
attr.batch.values = ptr_to_u64(values); |
|
attr.batch.count = *count; |
|
attr.batch.elem_flags = OPTS_GET(opts, elem_flags, 0); |
|
attr.batch.flags = OPTS_GET(opts, flags, 0); |
|
|
|
ret = sys_bpf(cmd, &attr, sizeof(attr)); |
|
*count = attr.batch.count; |
|
|
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
int bpf_map_delete_batch(int fd, const void *keys, __u32 *count, |
|
const struct bpf_map_batch_opts *opts) |
|
{ |
|
return bpf_map_batch_common(BPF_MAP_DELETE_BATCH, fd, NULL, |
|
NULL, (void *)keys, NULL, count, opts); |
|
} |
|
|
|
int bpf_map_lookup_batch(int fd, void *in_batch, void *out_batch, void *keys, |
|
void *values, __u32 *count, |
|
const struct bpf_map_batch_opts *opts) |
|
{ |
|
return bpf_map_batch_common(BPF_MAP_LOOKUP_BATCH, fd, in_batch, |
|
out_batch, keys, values, count, opts); |
|
} |
|
|
|
int bpf_map_lookup_and_delete_batch(int fd, void *in_batch, void *out_batch, |
|
void *keys, void *values, __u32 *count, |
|
const struct bpf_map_batch_opts *opts) |
|
{ |
|
return bpf_map_batch_common(BPF_MAP_LOOKUP_AND_DELETE_BATCH, |
|
fd, in_batch, out_batch, keys, values, |
|
count, opts); |
|
} |
|
|
|
int bpf_map_update_batch(int fd, const void *keys, const void *values, __u32 *count, |
|
const struct bpf_map_batch_opts *opts) |
|
{ |
|
return bpf_map_batch_common(BPF_MAP_UPDATE_BATCH, fd, NULL, NULL, |
|
(void *)keys, (void *)values, count, opts); |
|
} |
|
|
|
int bpf_obj_pin(int fd, const char *pathname) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.pathname = ptr_to_u64((void *)pathname); |
|
attr.bpf_fd = fd; |
|
|
|
ret = sys_bpf(BPF_OBJ_PIN, &attr, sizeof(attr)); |
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
int bpf_obj_get(const char *pathname) |
|
{ |
|
union bpf_attr attr; |
|
int fd; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.pathname = ptr_to_u64((void *)pathname); |
|
|
|
fd = sys_bpf_fd(BPF_OBJ_GET, &attr, sizeof(attr)); |
|
return libbpf_err_errno(fd); |
|
} |
|
|
|
int bpf_prog_attach(int prog_fd, int target_fd, enum bpf_attach_type type, |
|
unsigned int flags) |
|
{ |
|
DECLARE_LIBBPF_OPTS(bpf_prog_attach_opts, opts, |
|
.flags = flags, |
|
); |
|
|
|
return bpf_prog_attach_xattr(prog_fd, target_fd, type, &opts); |
|
} |
|
|
|
int bpf_prog_attach_xattr(int prog_fd, int target_fd, |
|
enum bpf_attach_type type, |
|
const struct bpf_prog_attach_opts *opts) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
if (!OPTS_VALID(opts, bpf_prog_attach_opts)) |
|
return libbpf_err(-EINVAL); |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.target_fd = target_fd; |
|
attr.attach_bpf_fd = prog_fd; |
|
attr.attach_type = type; |
|
attr.attach_flags = OPTS_GET(opts, flags, 0); |
|
attr.replace_bpf_fd = OPTS_GET(opts, replace_prog_fd, 0); |
|
|
|
ret = sys_bpf(BPF_PROG_ATTACH, &attr, sizeof(attr)); |
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
int bpf_prog_detach(int target_fd, enum bpf_attach_type type) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.target_fd = target_fd; |
|
attr.attach_type = type; |
|
|
|
ret = sys_bpf(BPF_PROG_DETACH, &attr, sizeof(attr)); |
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
int bpf_prog_detach2(int prog_fd, int target_fd, enum bpf_attach_type type) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.target_fd = target_fd; |
|
attr.attach_bpf_fd = prog_fd; |
|
attr.attach_type = type; |
|
|
|
ret = sys_bpf(BPF_PROG_DETACH, &attr, sizeof(attr)); |
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
int bpf_link_create(int prog_fd, int target_fd, |
|
enum bpf_attach_type attach_type, |
|
const struct bpf_link_create_opts *opts) |
|
{ |
|
__u32 target_btf_id, iter_info_len; |
|
union bpf_attr attr; |
|
int fd; |
|
|
|
if (!OPTS_VALID(opts, bpf_link_create_opts)) |
|
return libbpf_err(-EINVAL); |
|
|
|
iter_info_len = OPTS_GET(opts, iter_info_len, 0); |
|
target_btf_id = OPTS_GET(opts, target_btf_id, 0); |
|
|
|
/* validate we don't have unexpected combinations of non-zero fields */ |
|
if (iter_info_len || target_btf_id) { |
|
if (iter_info_len && target_btf_id) |
|
return libbpf_err(-EINVAL); |
|
if (!OPTS_ZEROED(opts, target_btf_id)) |
|
return libbpf_err(-EINVAL); |
|
} |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.link_create.prog_fd = prog_fd; |
|
attr.link_create.target_fd = target_fd; |
|
attr.link_create.attach_type = attach_type; |
|
attr.link_create.flags = OPTS_GET(opts, flags, 0); |
|
|
|
if (target_btf_id) { |
|
attr.link_create.target_btf_id = target_btf_id; |
|
goto proceed; |
|
} |
|
|
|
switch (attach_type) { |
|
case BPF_TRACE_ITER: |
|
attr.link_create.iter_info = ptr_to_u64(OPTS_GET(opts, iter_info, (void *)0)); |
|
attr.link_create.iter_info_len = iter_info_len; |
|
break; |
|
case BPF_PERF_EVENT: |
|
attr.link_create.perf_event.bpf_cookie = OPTS_GET(opts, perf_event.bpf_cookie, 0); |
|
if (!OPTS_ZEROED(opts, perf_event)) |
|
return libbpf_err(-EINVAL); |
|
break; |
|
default: |
|
if (!OPTS_ZEROED(opts, flags)) |
|
return libbpf_err(-EINVAL); |
|
break; |
|
} |
|
proceed: |
|
fd = sys_bpf_fd(BPF_LINK_CREATE, &attr, sizeof(attr)); |
|
return libbpf_err_errno(fd); |
|
} |
|
|
|
int bpf_link_detach(int link_fd) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.link_detach.link_fd = link_fd; |
|
|
|
ret = sys_bpf(BPF_LINK_DETACH, &attr, sizeof(attr)); |
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
int bpf_link_update(int link_fd, int new_prog_fd, |
|
const struct bpf_link_update_opts *opts) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
if (!OPTS_VALID(opts, bpf_link_update_opts)) |
|
return libbpf_err(-EINVAL); |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.link_update.link_fd = link_fd; |
|
attr.link_update.new_prog_fd = new_prog_fd; |
|
attr.link_update.flags = OPTS_GET(opts, flags, 0); |
|
attr.link_update.old_prog_fd = OPTS_GET(opts, old_prog_fd, 0); |
|
|
|
ret = sys_bpf(BPF_LINK_UPDATE, &attr, sizeof(attr)); |
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
int bpf_iter_create(int link_fd) |
|
{ |
|
union bpf_attr attr; |
|
int fd; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.iter_create.link_fd = link_fd; |
|
|
|
fd = sys_bpf_fd(BPF_ITER_CREATE, &attr, sizeof(attr)); |
|
return libbpf_err_errno(fd); |
|
} |
|
|
|
int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags, |
|
__u32 *attach_flags, __u32 *prog_ids, __u32 *prog_cnt) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.query.target_fd = target_fd; |
|
attr.query.attach_type = type; |
|
attr.query.query_flags = query_flags; |
|
attr.query.prog_cnt = *prog_cnt; |
|
attr.query.prog_ids = ptr_to_u64(prog_ids); |
|
|
|
ret = sys_bpf(BPF_PROG_QUERY, &attr, sizeof(attr)); |
|
|
|
if (attach_flags) |
|
*attach_flags = attr.query.attach_flags; |
|
*prog_cnt = attr.query.prog_cnt; |
|
|
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
int bpf_prog_test_run(int prog_fd, int repeat, void *data, __u32 size, |
|
void *data_out, __u32 *size_out, __u32 *retval, |
|
__u32 *duration) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.test.prog_fd = prog_fd; |
|
attr.test.data_in = ptr_to_u64(data); |
|
attr.test.data_out = ptr_to_u64(data_out); |
|
attr.test.data_size_in = size; |
|
attr.test.repeat = repeat; |
|
|
|
ret = sys_bpf(BPF_PROG_TEST_RUN, &attr, sizeof(attr)); |
|
|
|
if (size_out) |
|
*size_out = attr.test.data_size_out; |
|
if (retval) |
|
*retval = attr.test.retval; |
|
if (duration) |
|
*duration = attr.test.duration; |
|
|
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
if (!test_attr->data_out && test_attr->data_size_out > 0) |
|
return libbpf_err(-EINVAL); |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.test.prog_fd = test_attr->prog_fd; |
|
attr.test.data_in = ptr_to_u64(test_attr->data_in); |
|
attr.test.data_out = ptr_to_u64(test_attr->data_out); |
|
attr.test.data_size_in = test_attr->data_size_in; |
|
attr.test.data_size_out = test_attr->data_size_out; |
|
attr.test.ctx_in = ptr_to_u64(test_attr->ctx_in); |
|
attr.test.ctx_out = ptr_to_u64(test_attr->ctx_out); |
|
attr.test.ctx_size_in = test_attr->ctx_size_in; |
|
attr.test.ctx_size_out = test_attr->ctx_size_out; |
|
attr.test.repeat = test_attr->repeat; |
|
|
|
ret = sys_bpf(BPF_PROG_TEST_RUN, &attr, sizeof(attr)); |
|
|
|
test_attr->data_size_out = attr.test.data_size_out; |
|
test_attr->ctx_size_out = attr.test.ctx_size_out; |
|
test_attr->retval = attr.test.retval; |
|
test_attr->duration = attr.test.duration; |
|
|
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
int bpf_prog_test_run_opts(int prog_fd, struct bpf_test_run_opts *opts) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
if (!OPTS_VALID(opts, bpf_test_run_opts)) |
|
return libbpf_err(-EINVAL); |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.test.prog_fd = prog_fd; |
|
attr.test.cpu = OPTS_GET(opts, cpu, 0); |
|
attr.test.flags = OPTS_GET(opts, flags, 0); |
|
attr.test.repeat = OPTS_GET(opts, repeat, 0); |
|
attr.test.duration = OPTS_GET(opts, duration, 0); |
|
attr.test.ctx_size_in = OPTS_GET(opts, ctx_size_in, 0); |
|
attr.test.ctx_size_out = OPTS_GET(opts, ctx_size_out, 0); |
|
attr.test.data_size_in = OPTS_GET(opts, data_size_in, 0); |
|
attr.test.data_size_out = OPTS_GET(opts, data_size_out, 0); |
|
attr.test.ctx_in = ptr_to_u64(OPTS_GET(opts, ctx_in, NULL)); |
|
attr.test.ctx_out = ptr_to_u64(OPTS_GET(opts, ctx_out, NULL)); |
|
attr.test.data_in = ptr_to_u64(OPTS_GET(opts, data_in, NULL)); |
|
attr.test.data_out = ptr_to_u64(OPTS_GET(opts, data_out, NULL)); |
|
|
|
ret = sys_bpf(BPF_PROG_TEST_RUN, &attr, sizeof(attr)); |
|
|
|
OPTS_SET(opts, data_size_out, attr.test.data_size_out); |
|
OPTS_SET(opts, ctx_size_out, attr.test.ctx_size_out); |
|
OPTS_SET(opts, duration, attr.test.duration); |
|
OPTS_SET(opts, retval, attr.test.retval); |
|
|
|
return libbpf_err_errno(ret); |
|
} |
|
|
|
static int bpf_obj_get_next_id(__u32 start_id, __u32 *next_id, int cmd) |
|
{ |
|
union bpf_attr attr; |
|
int err; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.start_id = start_id; |
|
|
|
err = sys_bpf(cmd, &attr, sizeof(attr)); |
|
if (!err) |
|
*next_id = attr.next_id; |
|
|
|
return libbpf_err_errno(err); |
|
} |
|
|
|
int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id) |
|
{ |
|
return bpf_obj_get_next_id(start_id, next_id, BPF_PROG_GET_NEXT_ID); |
|
} |
|
|
|
int bpf_map_get_next_id(__u32 start_id, __u32 *next_id) |
|
{ |
|
return bpf_obj_get_next_id(start_id, next_id, BPF_MAP_GET_NEXT_ID); |
|
} |
|
|
|
int bpf_btf_get_next_id(__u32 start_id, __u32 *next_id) |
|
{ |
|
return bpf_obj_get_next_id(start_id, next_id, BPF_BTF_GET_NEXT_ID); |
|
} |
|
|
|
int bpf_link_get_next_id(__u32 start_id, __u32 *next_id) |
|
{ |
|
return bpf_obj_get_next_id(start_id, next_id, BPF_LINK_GET_NEXT_ID); |
|
} |
|
|
|
int bpf_prog_get_fd_by_id(__u32 id) |
|
{ |
|
union bpf_attr attr; |
|
int fd; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.prog_id = id; |
|
|
|
fd = sys_bpf_fd(BPF_PROG_GET_FD_BY_ID, &attr, sizeof(attr)); |
|
return libbpf_err_errno(fd); |
|
} |
|
|
|
int bpf_map_get_fd_by_id(__u32 id) |
|
{ |
|
union bpf_attr attr; |
|
int fd; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.map_id = id; |
|
|
|
fd = sys_bpf_fd(BPF_MAP_GET_FD_BY_ID, &attr, sizeof(attr)); |
|
return libbpf_err_errno(fd); |
|
} |
|
|
|
int bpf_btf_get_fd_by_id(__u32 id) |
|
{ |
|
union bpf_attr attr; |
|
int fd; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.btf_id = id; |
|
|
|
fd = sys_bpf_fd(BPF_BTF_GET_FD_BY_ID, &attr, sizeof(attr)); |
|
return libbpf_err_errno(fd); |
|
} |
|
|
|
int bpf_link_get_fd_by_id(__u32 id) |
|
{ |
|
union bpf_attr attr; |
|
int fd; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.link_id = id; |
|
|
|
fd = sys_bpf_fd(BPF_LINK_GET_FD_BY_ID, &attr, sizeof(attr)); |
|
return libbpf_err_errno(fd); |
|
} |
|
|
|
int bpf_obj_get_info_by_fd(int bpf_fd, void *info, __u32 *info_len) |
|
{ |
|
union bpf_attr attr; |
|
int err; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.info.bpf_fd = bpf_fd; |
|
attr.info.info_len = *info_len; |
|
attr.info.info = ptr_to_u64(info); |
|
|
|
err = sys_bpf(BPF_OBJ_GET_INFO_BY_FD, &attr, sizeof(attr)); |
|
|
|
if (!err) |
|
*info_len = attr.info.info_len; |
|
|
|
return libbpf_err_errno(err); |
|
} |
|
|
|
int bpf_raw_tracepoint_open(const char *name, int prog_fd) |
|
{ |
|
union bpf_attr attr; |
|
int fd; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.raw_tracepoint.name = ptr_to_u64(name); |
|
attr.raw_tracepoint.prog_fd = prog_fd; |
|
|
|
fd = sys_bpf_fd(BPF_RAW_TRACEPOINT_OPEN, &attr, sizeof(attr)); |
|
return libbpf_err_errno(fd); |
|
} |
|
|
|
int bpf_btf_load(const void *btf_data, size_t btf_size, const struct bpf_btf_load_opts *opts) |
|
{ |
|
const size_t attr_sz = offsetofend(union bpf_attr, btf_log_level); |
|
union bpf_attr attr; |
|
char *log_buf; |
|
size_t log_size; |
|
__u32 log_level; |
|
int fd; |
|
|
|
bump_rlimit_memlock(); |
|
|
|
memset(&attr, 0, attr_sz); |
|
|
|
if (!OPTS_VALID(opts, bpf_btf_load_opts)) |
|
return libbpf_err(-EINVAL); |
|
|
|
log_buf = OPTS_GET(opts, log_buf, NULL); |
|
log_size = OPTS_GET(opts, log_size, 0); |
|
log_level = OPTS_GET(opts, log_level, 0); |
|
|
|
if (log_size > UINT_MAX) |
|
return libbpf_err(-EINVAL); |
|
if (log_size && !log_buf) |
|
return libbpf_err(-EINVAL); |
|
|
|
attr.btf = ptr_to_u64(btf_data); |
|
attr.btf_size = btf_size; |
|
/* 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 |
|
* APIs within libbpf and provides a sensible behavior in practice |
|
*/ |
|
if (log_level) { |
|
attr.btf_log_buf = ptr_to_u64(log_buf); |
|
attr.btf_log_size = (__u32)log_size; |
|
attr.btf_log_level = log_level; |
|
} |
|
|
|
fd = sys_bpf_fd(BPF_BTF_LOAD, &attr, attr_sz); |
|
if (fd < 0 && log_buf && log_level == 0) { |
|
attr.btf_log_buf = ptr_to_u64(log_buf); |
|
attr.btf_log_size = (__u32)log_size; |
|
attr.btf_log_level = 1; |
|
fd = sys_bpf_fd(BPF_BTF_LOAD, &attr, attr_sz); |
|
} |
|
return libbpf_err_errno(fd); |
|
} |
|
|
|
int bpf_load_btf(const void *btf, __u32 btf_size, char *log_buf, __u32 log_buf_size, bool do_log) |
|
{ |
|
LIBBPF_OPTS(bpf_btf_load_opts, opts); |
|
int fd; |
|
|
|
retry: |
|
if (do_log && log_buf && log_buf_size) { |
|
opts.log_buf = log_buf; |
|
opts.log_size = log_buf_size; |
|
opts.log_level = 1; |
|
} |
|
|
|
fd = bpf_btf_load(btf, btf_size, &opts); |
|
if (fd < 0 && !do_log && log_buf && log_buf_size) { |
|
do_log = true; |
|
goto retry; |
|
} |
|
|
|
return libbpf_err_errno(fd); |
|
} |
|
|
|
int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, __u32 *buf_len, |
|
__u32 *prog_id, __u32 *fd_type, __u64 *probe_offset, |
|
__u64 *probe_addr) |
|
{ |
|
union bpf_attr attr = {}; |
|
int err; |
|
|
|
attr.task_fd_query.pid = pid; |
|
attr.task_fd_query.fd = fd; |
|
attr.task_fd_query.flags = flags; |
|
attr.task_fd_query.buf = ptr_to_u64(buf); |
|
attr.task_fd_query.buf_len = *buf_len; |
|
|
|
err = sys_bpf(BPF_TASK_FD_QUERY, &attr, sizeof(attr)); |
|
|
|
*buf_len = attr.task_fd_query.buf_len; |
|
*prog_id = attr.task_fd_query.prog_id; |
|
*fd_type = attr.task_fd_query.fd_type; |
|
*probe_offset = attr.task_fd_query.probe_offset; |
|
*probe_addr = attr.task_fd_query.probe_addr; |
|
|
|
return libbpf_err_errno(err); |
|
} |
|
|
|
int bpf_enable_stats(enum bpf_stats_type type) |
|
{ |
|
union bpf_attr attr; |
|
int fd; |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.enable_stats.type = type; |
|
|
|
fd = sys_bpf_fd(BPF_ENABLE_STATS, &attr, sizeof(attr)); |
|
return libbpf_err_errno(fd); |
|
} |
|
|
|
int bpf_prog_bind_map(int prog_fd, int map_fd, |
|
const struct bpf_prog_bind_opts *opts) |
|
{ |
|
union bpf_attr attr; |
|
int ret; |
|
|
|
if (!OPTS_VALID(opts, bpf_prog_bind_opts)) |
|
return libbpf_err(-EINVAL); |
|
|
|
memset(&attr, 0, sizeof(attr)); |
|
attr.prog_bind_map.prog_fd = prog_fd; |
|
attr.prog_bind_map.map_fd = map_fd; |
|
attr.prog_bind_map.flags = OPTS_GET(opts, flags, 0); |
|
|
|
ret = sys_bpf(BPF_PROG_BIND_MAP, &attr, sizeof(attr)); |
|
return libbpf_err_errno(ret); |
|
}
|
|
|