diff options
| author | Quentin Monnet <quentin@isovalent.com> | 2021-07-29 19:20:27 +0300 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2021-07-30 03:23:59 +0300 |
| commit | 61fc51b1d3e5915e356f2c0b67cd3bb13b640413 (patch) | |
| tree | cb7fd1759686f6cdb295a30b0cda13f402f2fe3b /tools/lib | |
| parent | 86f4b7f2578f69284fa782be54e700c42c757897 (diff) | |
| download | linux-61fc51b1d3e5915e356f2c0b67cd3bb13b640413.tar.xz | |
libbpf: Add split BTF support for btf__load_from_kernel_by_id()
Add a new API function btf__load_from_kernel_by_id_split(), which takes
a pointer to a base BTF object in order to support split BTF objects
when retrieving BTF information from the kernel.
Reference: https://github.com/libbpf/libbpf/issues/314
Signed-off-by: Quentin Monnet <quentin@isovalent.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20210729162028.29512-8-quentin@isovalent.com
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/bpf/btf.c | 9 | ||||
| -rw-r--r-- | tools/lib/bpf/btf.h | 1 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.map | 1 |
3 files changed, 9 insertions, 2 deletions
diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c index 948c29fee447..cafa4f6bd9b1 100644 --- a/tools/lib/bpf/btf.c +++ b/tools/lib/bpf/btf.c @@ -1383,7 +1383,7 @@ exit_free: return btf; } -struct btf *btf__load_from_kernel_by_id(__u32 id) +struct btf *btf__load_from_kernel_by_id_split(__u32 id, struct btf *base_btf) { struct btf *btf; int btf_fd; @@ -1392,12 +1392,17 @@ struct btf *btf__load_from_kernel_by_id(__u32 id) if (btf_fd < 0) return libbpf_err_ptr(-errno); - btf = btf_get_from_fd(btf_fd, NULL); + btf = btf_get_from_fd(btf_fd, base_btf); close(btf_fd); return libbpf_ptr(btf); } +struct btf *btf__load_from_kernel_by_id(__u32 id) +{ + return btf__load_from_kernel_by_id_split(id, NULL); +} + int btf__get_from_id(__u32 id, struct btf **btf) { struct btf *res; diff --git a/tools/lib/bpf/btf.h b/tools/lib/bpf/btf.h index 5d955329a1f4..596a42c8f4f5 100644 --- a/tools/lib/bpf/btf.h +++ b/tools/lib/bpf/btf.h @@ -45,6 +45,7 @@ LIBBPF_API struct btf *btf__parse_raw(const char *path); LIBBPF_API struct btf *btf__parse_raw_split(const char *path, struct btf *base_btf); LIBBPF_API struct btf *btf__load_from_kernel_by_id(__u32 id); +LIBBPF_API struct btf *btf__load_from_kernel_by_id_split(__u32 id, struct btf *base_btf); LIBBPF_API int btf__get_from_id(__u32 id, struct btf **btf); LIBBPF_API int btf__finalize_data(struct bpf_object *obj, struct btf *btf); diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 3a9c6939301e..5aca3686ca5e 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -376,6 +376,7 @@ LIBBPF_0.5.0 { bpf_program__attach_kprobe_opts; bpf_object__gen_loader; btf__load_from_kernel_by_id; + btf__load_from_kernel_by_id_split; btf__load_into_kernel; btf_dump__dump_type_data; libbpf_set_strict_mode; |