38d5d3b3d5
This patch introduces BPF_ANNOTATE_KV_PAIR to signal the
bpf loader about the btf key_type and value_type of a bpf map.
Please refer to the changes in test_btf_haskv.c for its usage.
Both iproute2 and libbpf loader will then have the same
convention to find out the map's btf_key_type_id and
btf_value_type_id from a map's name.
Fixes: 8a138aed4a80 ("bpf: btf: Add BTF support to libbpf")
Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
25 lines
643 B
C
25 lines
643 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (c) 2018 Facebook */
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#ifndef __BPF_BTF_H
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#define __BPF_BTF_H
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#include <linux/types.h>
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#define BTF_ELF_SEC ".BTF"
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struct btf;
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struct btf_type;
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typedef int (*btf_print_fn_t)(const char *, ...)
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__attribute__((format(printf, 1, 2)));
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void btf__free(struct btf *btf);
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struct btf *btf__new(__u8 *data, __u32 size, btf_print_fn_t err_log);
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__s32 btf__find_by_name(const struct btf *btf, const char *type_name);
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const struct btf_type *btf__type_by_id(const struct btf *btf, __u32 id);
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__s64 btf__resolve_size(const struct btf *btf, __u32 type_id);
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int btf__fd(const struct btf *btf);
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#endif
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