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authorAndrii Nakryiko <andriin@fb.com>2019-12-13 17:43:36 -0800
committerAlexei Starovoitov <ast@kernel.org>2019-12-15 15:58:05 -0800
commitd66562fba1ce66975bd61b0786fb8b1810f33caa (patch)
tree1c5a88f4a60ce1d654c48e764de023be0ba678d1 /tools/lib/bpf/libbpf.h
parentlibbpf: Reduce log level of supported section names dump (diff)
downloadlinux-dev-d66562fba1ce66975bd61b0786fb8b1810f33caa.tar.xz
linux-dev-d66562fba1ce66975bd61b0786fb8b1810f33caa.zip
libbpf: Add BPF object skeleton support
Add new set of APIs, allowing to open/load/attach BPF object through BPF object skeleton, generated by bpftool for a specific BPF object file. All the xxx_skeleton() APIs wrap up corresponding bpf_object_xxx() APIs, but additionally also automate map/program lookups by name, global data initialization and mmap()-ing, etc. All this greatly improves and simplifies userspace usability of working with BPF programs. See follow up patches for examples. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20191214014341.3442258-13-andriin@fb.com
Diffstat (limited to '')
-rw-r--r--tools/lib/bpf/libbpf.h38
1 files changed, 38 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index f37bd4a3e14b..623191e71415 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -631,6 +631,44 @@ BPF_EMBED_OBJ_DECLARE(NAME)
#define BPF_EMBED_OBJ(NAME, PATH) __BPF_EMBED_OBJ(NAME, PATH, 16, ".quad")
#endif
+struct bpf_map_skeleton {
+ const char *name;
+ struct bpf_map **map;
+ void **mmaped;
+};
+
+struct bpf_prog_skeleton {
+ const char *name;
+ struct bpf_program **prog;
+ struct bpf_link **link;
+};
+
+struct bpf_object_skeleton {
+ size_t sz; /* size of this struct, for forward/backward compatibility */
+
+ const char *name;
+ void *data;
+ size_t data_sz;
+
+ struct bpf_object **obj;
+
+ int map_cnt;
+ int map_skel_sz; /* sizeof(struct bpf_skeleton_map) */
+ struct bpf_map_skeleton *maps;
+
+ int prog_cnt;
+ int prog_skel_sz; /* sizeof(struct bpf_skeleton_prog) */
+ struct bpf_prog_skeleton *progs;
+};
+
+LIBBPF_API int
+bpf_object__open_skeleton(struct bpf_object_skeleton *s,
+ const struct bpf_object_open_opts *opts);
+LIBBPF_API int bpf_object__load_skeleton(struct bpf_object_skeleton *s);
+LIBBPF_API int bpf_object__attach_skeleton(struct bpf_object_skeleton *s);
+LIBBPF_API void bpf_object__detach_skeleton(struct bpf_object_skeleton *s);
+LIBBPF_API void bpf_object__destroy_skeleton(struct bpf_object_skeleton *s);
+
#ifdef __cplusplus
} /* extern "C" */
#endif