libbpf: Rename bpf_prog_attach_xattr() to bpf_prog_attach_opts()

All xattr APIs are being dropped, let's converge to the convention used in
high-level APIs and rename bpf_prog_attach_xattr to bpf_prog_attach_opts.
Signed-off-by: Christy Lee <christylee@fb.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220107184604.3668544-2-christylee@fb.com

tools/lib/bpf/bpf.c

@@ -754,10 +754,10 @@ int bpf_prog_attach(int prog_fd, int target_fd, enum bpf_attach_type type,
 		.flags = flags,
 	);
 
-	return bpf_prog_attach_xattr(prog_fd, target_fd, type, &opts);
+	return bpf_prog_attach_opts(prog_fd, target_fd, type, &opts);
 }
 
-int bpf_prog_attach_xattr(int prog_fd, int target_fd,
+int bpf_prog_attach_opts(int prog_fd, int target_fd,
 			  enum bpf_attach_type type,
 			  const struct bpf_prog_attach_opts *opts)
 {
@@ -778,6 +778,11 @@ int bpf_prog_attach_xattr(int prog_fd, int target_fd,
 	return libbpf_err_errno(ret);
 }
 
+__attribute__((alias("bpf_prog_attach_opts")))
+int bpf_prog_attach_xattr(int prog_fd, int target_fd,
+			  enum bpf_attach_type type,
+			  const struct bpf_prog_attach_opts *opts);
+
 int bpf_prog_detach(int target_fd, enum bpf_attach_type type)
 {
 	union bpf_attr attr;

tools/lib/bpf/bpf.h

@@ -391,6 +391,10 @@ struct bpf_prog_attach_opts {
 
 LIBBPF_API int bpf_prog_attach(int prog_fd, int attachable_fd,
 			       enum bpf_attach_type type, unsigned int flags);
+LIBBPF_API int bpf_prog_attach_opts(int prog_fd, int attachable_fd,
+				     enum bpf_attach_type type,
+				     const struct bpf_prog_attach_opts *opts);
+LIBBPF_DEPRECATED_SINCE(0, 8, "use bpf_prog_attach_opts() instead")
 LIBBPF_API int bpf_prog_attach_xattr(int prog_fd, int attachable_fd,
 				     enum bpf_attach_type type,
 				     const struct bpf_prog_attach_opts *opts);

tools/lib/bpf/libbpf.map

@@ -247,6 +247,7 @@ LIBBPF_0.0.8 {
 		bpf_link_create;
 		bpf_link_update;
 		bpf_map__set_initial_value;
+		bpf_prog_attach_opts;
 		bpf_program__attach_cgroup;
 		bpf_program__attach_lsm;
 		bpf_program__is_lsm;