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authorAlexei Starovoitov <ast@fb.com>2017-10-02 22:50:27 -0700
committerDavid S. Miller <davem@davemloft.net>2017-10-04 16:05:05 -0700
commit5d0cbf9b6c11964bf2f4041a5b0b6f81cb169736 (patch)
tree88888ccb66f2d05cba46fc8a7d2ce18aa18a722d /tools/lib
parentdefd9c476fa6b01b4eb5450452bfd202138decb7 (diff)
downloadop-kernel-dev-5d0cbf9b6c11964bf2f4041a5b0b6f81cb169736.zip
op-kernel-dev-5d0cbf9b6c11964bf2f4041a5b0b6f81cb169736.tar.gz
libbpf: add support for BPF_PROG_QUERY
add support for BPF_PROG_QUERY command to libbpf Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/lib')
-rw-r--r--tools/lib/bpf/bpf.c20
-rw-r--r--tools/lib/bpf/bpf.h3
2 files changed, 22 insertions, 1 deletions
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index d4b6ba8..5128677 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -303,6 +303,26 @@ int bpf_prog_detach2(int prog_fd, int target_fd, enum bpf_attach_type type)
return sys_bpf(BPF_PROG_DETACH, &attr, sizeof(attr));
}
+int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags,
+ __u32 *attach_flags, __u32 *prog_ids, __u32 *prog_cnt)
+{
+ union bpf_attr attr;
+ int ret;
+
+ bzero(&attr, sizeof(attr));
+ attr.query.target_fd = target_fd;
+ attr.query.attach_type = type;
+ attr.query.query_flags = query_flags;
+ attr.query.prog_cnt = *prog_cnt;
+ attr.query.prog_ids = ptr_to_u64(prog_ids);
+
+ ret = sys_bpf(BPF_PROG_QUERY, &attr, sizeof(attr));
+ if (attach_flags)
+ *attach_flags = attr.query.attach_flags;
+ *prog_cnt = attr.query.prog_cnt;
+ return ret;
+}
+
int bpf_prog_test_run(int prog_fd, int repeat, void *data, __u32 size,
void *data_out, __u32 *size_out, __u32 *retval,
__u32 *duration)
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index afd6472..6534889 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -75,5 +75,6 @@ int bpf_map_get_next_id(__u32 start_id, __u32 *next_id);
int bpf_prog_get_fd_by_id(__u32 id);
int bpf_map_get_fd_by_id(__u32 id);
int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len);
-
+int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags,
+ __u32 *attach_flags, __u32 *prog_ids, __u32 *prog_cnt);
#endif
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