56d3e44af8
Various tests specify extra testing prog_flags when loading BPF programs, like BPF_F_TEST_RND_HI32, and more recently also BPF_F_TEST_REG_INVARIANTS. While BPF_F_TEST_RND_HI32 is old enough to not cause much problem on older kernels, BPF_F_TEST_REG_INVARIANTS is very fresh and unconditionally specifying it causes selftests to fail on even slightly outdated kernels. This breaks libbpf CI test against 4.9 and 5.15 kernels, it can break some local development (done outside of VM), etc. To prevent this, and guard against similar problems in the future, do runtime detection of supported "testing flags", and only provide those that host kernel recognizes. Acked-by: Song Liu <song@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/r/20240109231738.575844-1-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
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/* Copyright (C) 2020 Facebook, Inc. */
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#ifndef __TESTING_HELPERS_H
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#define __TESTING_HELPERS_H
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#include <stdbool.h>
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#include <bpf/bpf.h>
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#include <bpf/libbpf.h>
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#include <time.h>
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#define __TO_STR(x) #x
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#define TO_STR(x) __TO_STR(x)
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int parse_num_list(const char *s, bool **set, int *set_len);
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__u32 link_info_prog_id(const struct bpf_link *link, struct bpf_link_info *info);
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int bpf_prog_test_load(const char *file, enum bpf_prog_type type,
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struct bpf_object **pobj, int *prog_fd);
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int bpf_test_load_program(enum bpf_prog_type type, const struct bpf_insn *insns,
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size_t insns_cnt, const char *license,
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__u32 kern_version, char *log_buf,
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size_t log_buf_sz);
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/*
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* below function is exported for testing in prog_test test
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*/
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struct test_filter_set;
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int parse_test_list(const char *s,
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struct test_filter_set *test_set,
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bool is_glob_pattern);
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int parse_test_list_file(const char *path,
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struct test_filter_set *test_set,
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bool is_glob_pattern);
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__u64 read_perf_max_sample_freq(void);
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int load_bpf_testmod(bool verbose);
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int unload_bpf_testmod(bool verbose);
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int kern_sync_rcu(void);
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static inline __u64 get_time_ns(void)
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{
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struct timespec t;
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clock_gettime(CLOCK_MONOTONIC, &t);
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return (u64)t.tv_sec * 1000000000 + t.tv_nsec;
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}
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struct bpf_insn;
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/* Request BPF program instructions after all rewrites are applied,
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* e.g. verifier.c:convert_ctx_access() is done.
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*/
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int get_xlated_program(int fd_prog, struct bpf_insn **buf, __u32 *cnt);
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int testing_prog_flags(void);
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#endif /* __TESTING_HELPERS_H */
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