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authorQuentin Monnet <quentin.monnet@netronome.com>2019-08-20 10:31:53 +0100
committerAlexei Starovoitov <ast@kernel.org>2019-08-20 09:51:06 -0700
commit09d7c2e32b6e06d58fe7a5aa38847f4719ab4cc7 (patch)
tree468ec4aa0449a0e88497e2ab306f567dda65f0bf /tools/lib
parenta6e130c4203bcc73450a00f647d99bd75ded95cb (diff)
libbpf: add bpf_btf_get_next_id() to cycle through BTF objects
Add an API function taking a BTF object id and providing the id of the next BTF object in the kernel. This can be used to list all BTF objects loaded on the system. v2: - Rebase on top of Andrii's changes regarding libbpf versioning. Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/lib')
-rw-r--r--tools/lib/bpf/bpf.c5
-rw-r--r--tools/lib/bpf/bpf.h1
-rw-r--r--tools/lib/bpf/libbpf.map2
3 files changed, 8 insertions, 0 deletions
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 1439e99c9be5..cbb933532981 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -593,6 +593,11 @@ int bpf_map_get_next_id(__u32 start_id, __u32 *next_id)
return bpf_obj_get_next_id(start_id, next_id, BPF_MAP_GET_NEXT_ID);
}
+int bpf_btf_get_next_id(__u32 start_id, __u32 *next_id)
+{
+ return bpf_obj_get_next_id(start_id, next_id, BPF_BTF_GET_NEXT_ID);
+}
+
int bpf_prog_get_fd_by_id(__u32 id)
{
union bpf_attr attr;
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index ff42ca043dc8..0db01334740f 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -156,6 +156,7 @@ LIBBPF_API int bpf_prog_test_run(int prog_fd, int repeat, void *data,
__u32 *retval, __u32 *duration);
LIBBPF_API int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id);
LIBBPF_API int bpf_map_get_next_id(__u32 start_id, __u32 *next_id);
+LIBBPF_API int bpf_btf_get_next_id(__u32 start_id, __u32 *next_id);
LIBBPF_API int bpf_prog_get_fd_by_id(__u32 id);
LIBBPF_API int bpf_map_get_fd_by_id(__u32 id);
LIBBPF_API int bpf_btf_get_fd_by_id(__u32 id);
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map
index 4e72df8e98ba..664ce8e7a60e 100644
--- a/tools/lib/bpf/libbpf.map
+++ b/tools/lib/bpf/libbpf.map
@@ -186,4 +186,6 @@ LIBBPF_0.0.4 {
} LIBBPF_0.0.3;
LIBBPF_0.0.5 {
+ global:
+ bpf_btf_get_next_id;
} LIBBPF_0.0.4;