[PATCH v2 bpf-next 8/9] libbpf: add btf__str_by_offset() as a more generic variant of name_by_offset
From: Andrii Nakryiko <hidden>
Date: 2020-09-26 01:14:58
Also in:
netdev
Subsystem:
bpf [general] (safe dynamic programs and tools), bpf [library] (libbpf), the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Linus Torvalds
BTF strings are used not just for names, they can be arbitrary strings used for CO-RE relocations, line/func infos, etc. Thus "name_by_offset" terminology is too specific and might be misleading. Instead, introduce btf__str_by_offset() API which uses generic string terminology. Acked-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Andrii Nakryiko <redacted> --- tools/lib/bpf/btf.c | 7 ++++++- tools/lib/bpf/btf.h | 1 + tools/lib/bpf/libbpf.map | 1 + 3 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c
index 7533088b2524..2d0b1e12f50e 100644
--- a/tools/lib/bpf/btf.c
+++ b/tools/lib/bpf/btf.c@@ -1025,7 +1025,7 @@ const void *btf__get_raw_data(const struct btf *btf_ro, __u32 *size) return btf->raw_data; } -const char *btf__name_by_offset(const struct btf *btf, __u32 offset) +const char *btf__str_by_offset(const struct btf *btf, __u32 offset) { if (offset < btf->hdr->str_len) return btf->strs_data + offset;
@@ -1033,6 +1033,11 @@ const char *btf__name_by_offset(const struct btf *btf, __u32 offset) return NULL; } +const char *btf__name_by_offset(const struct btf *btf, __u32 offset) +{ + return btf__str_by_offset(btf, offset); +} + int btf__get_from_id(__u32 id, struct btf **btf) { struct bpf_btf_info btf_info = { 0 };
diff --git a/tools/lib/bpf/btf.h b/tools/lib/bpf/btf.h
index d6629a2e8ebf..f7dec0144c3c 100644
--- a/tools/lib/bpf/btf.h
+++ b/tools/lib/bpf/btf.h@@ -49,6 +49,7 @@ LIBBPF_API int btf__fd(const struct btf *btf); LIBBPF_API void btf__set_fd(struct btf *btf, int fd); LIBBPF_API const void *btf__get_raw_data(const struct btf *btf, __u32 *size); LIBBPF_API const char *btf__name_by_offset(const struct btf *btf, __u32 offset); +LIBBPF_API const char *btf__str_by_offset(const struct btf *btf, __u32 offset); LIBBPF_API int btf__get_from_id(__u32 id, struct btf **btf); LIBBPF_API int btf__get_map_kv_tids(const struct btf *btf, const char *map_name, __u32 expected_key_size,
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map
index 1cb98d01e4f2..560907ba5aac 100644
--- a/tools/lib/bpf/libbpf.map
+++ b/tools/lib/bpf/libbpf.map@@ -326,6 +326,7 @@ LIBBPF_0.2.0 { btf__add_volatile; btf__find_str; btf__new_empty; + btf__str_by_offset; perf_buffer__buffer_cnt; perf_buffer__buffer_fd; perf_buffer__epoll_fd;
--
2.24.1