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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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a6c109a6b7
Commit96408c4344("tools/bpf: implement libbpf btf__get_map_kv_tids() API function") added the API function btf__get_map_kv_tids(): btf__get_map_kv_tids(const struct btf *btf, char *map_name, ...) The parameter map_name has type "char *". This is okay inside libbpf library since the map_name is from bpf_map->name which also has type "char *". This will be problematic if the caller for map_name already has attribute "const", e.g., from C++ string.c_str(). It will result in either a warning or an error. /home/yhs/work/bcc/src/cc/btf.cc:166:51: error: invalid conversion from ‘const char*’ to ‘char*’ [-fpermissive] return btf__get_map_kv_tids(btf_, map_name.c_str() This patch added "const" attributes to map_name parameter. Fixes:96408c4344("tools/bpf: implement libbpf btf__get_map_kv_tids() API function") Signed-off-by: Yonghong Song <yhs@fb.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
102 lines
3.3 KiB
C
102 lines
3.3 KiB
C
/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
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/* Copyright (c) 2018 Facebook */
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#ifndef __LIBBPF_BTF_H
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#define __LIBBPF_BTF_H
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#include <linux/types.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef LIBBPF_API
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#define LIBBPF_API __attribute__((visibility("default")))
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#endif
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#define BTF_ELF_SEC ".BTF"
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#define BTF_EXT_ELF_SEC ".BTF.ext"
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struct btf;
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struct btf_ext;
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struct btf_type;
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/*
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* The .BTF.ext ELF section layout defined as
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* struct btf_ext_header
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* func_info subsection
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*
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* The func_info subsection layout:
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* record size for struct bpf_func_info in the func_info subsection
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* struct btf_sec_func_info for section #1
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* a list of bpf_func_info records for section #1
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* where struct bpf_func_info mimics one in include/uapi/linux/bpf.h
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* but may not be identical
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* struct btf_sec_func_info for section #2
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* a list of bpf_func_info records for section #2
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* ......
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*
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* Note that the bpf_func_info record size in .BTF.ext may not
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* be the same as the one defined in include/uapi/linux/bpf.h.
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* The loader should ensure that record_size meets minimum
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* requirement and pass the record as is to the kernel. The
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* kernel will handle the func_info properly based on its contents.
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*/
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struct btf_ext_header {
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__u16 magic;
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__u8 version;
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__u8 flags;
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__u32 hdr_len;
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/* All offsets are in bytes relative to the end of this header */
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__u32 func_info_off;
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__u32 func_info_len;
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__u32 line_info_off;
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__u32 line_info_len;
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};
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LIBBPF_API void btf__free(struct btf *btf);
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LIBBPF_API struct btf *btf__new(__u8 *data, __u32 size);
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LIBBPF_API __s32 btf__find_by_name(const struct btf *btf,
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const char *type_name);
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LIBBPF_API __u32 btf__get_nr_types(const struct btf *btf);
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LIBBPF_API const struct btf_type *btf__type_by_id(const struct btf *btf,
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__u32 id);
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LIBBPF_API __s64 btf__resolve_size(const struct btf *btf, __u32 type_id);
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LIBBPF_API int btf__resolve_type(const struct btf *btf, __u32 type_id);
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LIBBPF_API int btf__fd(const struct btf *btf);
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LIBBPF_API void btf__get_strings(const struct btf *btf, const char **strings,
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__u32 *str_len);
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LIBBPF_API const char *btf__name_by_offset(const struct btf *btf, __u32 offset);
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LIBBPF_API int btf__get_from_id(__u32 id, struct btf **btf);
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LIBBPF_API int btf__get_map_kv_tids(const struct btf *btf, const char *map_name,
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__u32 expected_key_size,
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__u32 expected_value_size,
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__u32 *key_type_id, __u32 *value_type_id);
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LIBBPF_API struct btf_ext *btf_ext__new(__u8 *data, __u32 size);
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LIBBPF_API void btf_ext__free(struct btf_ext *btf_ext);
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LIBBPF_API int btf_ext__reloc_func_info(const struct btf *btf,
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const struct btf_ext *btf_ext,
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const char *sec_name, __u32 insns_cnt,
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void **func_info, __u32 *cnt);
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LIBBPF_API int btf_ext__reloc_line_info(const struct btf *btf,
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const struct btf_ext *btf_ext,
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const char *sec_name, __u32 insns_cnt,
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void **line_info, __u32 *cnt);
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LIBBPF_API __u32 btf_ext__func_info_rec_size(const struct btf_ext *btf_ext);
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LIBBPF_API __u32 btf_ext__line_info_rec_size(const struct btf_ext *btf_ext);
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struct btf_dedup_opts {
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bool dont_resolve_fwds;
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};
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LIBBPF_API int btf__dedup(struct btf *btf, struct btf_ext *btf_ext,
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const struct btf_dedup_opts *opts);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* __LIBBPF_BTF_H */
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