libbpf: introduce bpf_prog_detach2()

introduce bpf_prog_detach2() that takes one more argument prog_fd
vs bpf_prog_detach() that takes only attach_fd and type.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 12 insertions, 0 deletions

diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index daf624e4c720..d4b6ba8292ee 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -291,6 +291,18 @@ int bpf_prog_detach(int target_fd, enum bpf_attach_type type)
         return sys_bpf(BPF_PROG_DETACH, &attr, sizeof(attr));
 }
 
+int bpf_prog_detach2(int prog_fd, int target_fd, enum bpf_attach_type type)
+{
+        union bpf_attr attr;
+
+        bzero(&attr, sizeof(attr));
+        attr.target_fd   = target_fd;
+        attr.attach_bpf_fd = prog_fd;
+        attr.attach_type = type;
+
+        return sys_bpf(BPF_PROG_DETACH, &attr, sizeof(attr));
+}
+
 int bpf_prog_test_run(int prog_fd, int repeat, void *data, __u32 size,
                       void *data_out, __u32 *size_out, __u32 *retval,
                       __u32 *duration)