libbpf: remove deprecated XDP APIs

Get rid of deprecated bpf_set_link*() and bpf_get_link*() APIs.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20220627211527.2245459-4-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

tools/lib/bpf/libbpf.h

@@ -1164,33 +1164,13 @@ LIBBPF_API int bpf_map__get_next_key(const struct bpf_map *map,
  */
 LIBBPF_API long libbpf_get_error(const void *ptr);
 
-/* XDP related API */
-struct xdp_link_info {
-	__u32 prog_id;
-	__u32 drv_prog_id;
-	__u32 hw_prog_id;
-	__u32 skb_prog_id;
-	__u8 attach_mode;
-};
-
 struct bpf_xdp_set_link_opts {
 	size_t sz;
 	int old_fd;
 	size_t :0;
 };
 #define bpf_xdp_set_link_opts__last_field old_fd
 
-LIBBPF_DEPRECATED_SINCE(0, 8, "use bpf_xdp_attach() instead")
-LIBBPF_API int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags);
-LIBBPF_DEPRECATED_SINCE(0, 8, "use bpf_xdp_attach() instead")
-LIBBPF_API int bpf_set_link_xdp_fd_opts(int ifindex, int fd, __u32 flags,
-					const struct bpf_xdp_set_link_opts *opts);
-LIBBPF_DEPRECATED_SINCE(0, 8, "use bpf_xdp_query_id() instead")
-LIBBPF_API int bpf_get_link_xdp_id(int ifindex, __u32 *prog_id, __u32 flags);
-LIBBPF_DEPRECATED_SINCE(0, 8, "use bpf_xdp_query() instead")
-LIBBPF_API int bpf_get_link_xdp_info(int ifindex, struct xdp_link_info *info,
-				     size_t info_size, __u32 flags);
-
 struct bpf_xdp_attach_opts {
 	size_t sz;
 	int old_prog_fd;

tools/lib/bpf/libbpf.map

@@ -91,7 +91,6 @@ LIBBPF_0.0.1 {
 		bpf_prog_linfo__lfind_addr_func;
 		bpf_prog_linfo__lfind;
 		bpf_raw_tracepoint_open;
-		bpf_set_link_xdp_fd;
 		bpf_task_fd_query;
 		btf__fd;
 		btf__find_by_name;
@@ -120,7 +119,6 @@ LIBBPF_0.0.2 {
 		bpf_map_lookup_elem_flags;
 		bpf_object__btf;
 		bpf_object__find_map_fd_by_name;
-		bpf_get_link_xdp_id;
 		btf__dedup;
 		btf__get_map_kv_tids;
 		btf__get_nr_types;
@@ -172,7 +170,6 @@ LIBBPF_0.0.5 {
 
 LIBBPF_0.0.6 {
 	global:
-		bpf_get_link_xdp_info;
 		bpf_map__get_pin_path;
 		bpf_map__is_pinned;
 		bpf_map__set_pin_path;
@@ -231,7 +228,6 @@ LIBBPF_0.0.8 {
 		bpf_program__is_lsm;
 		bpf_program__set_attach_target;
 		bpf_program__set_lsm;
-		bpf_set_link_xdp_fd_opts;
 } LIBBPF_0.0.7;
 
 LIBBPF_0.0.9 {

tools/lib/bpf/netlink.c

@@ -27,6 +27,14 @@ typedef int (*libbpf_dump_nlmsg_t)(void *cookie, void *msg, struct nlattr **tb);
 typedef int (*__dump_nlmsg_t)(struct nlmsghdr *nlmsg, libbpf_dump_nlmsg_t,
 			      void *cookie);
 
+struct xdp_link_info {
+	__u32 prog_id;
+	__u32 drv_prog_id;
+	__u32 hw_prog_id;
+	__u32 skb_prog_id;
+	__u8 attach_mode;
+};
+
 struct xdp_id_md {
 	int ifindex;
 	__u32 flags;
@@ -288,31 +296,6 @@ int bpf_xdp_detach(int ifindex, __u32 flags, const struct bpf_xdp_attach_opts *o
 	return bpf_xdp_attach(ifindex, -1, flags, opts);
 }
 
-int bpf_set_link_xdp_fd_opts(int ifindex, int fd, __u32 flags,
-			     const struct bpf_xdp_set_link_opts *opts)
-{
-	int old_fd = -1, ret;
-
-	if (!OPTS_VALID(opts, bpf_xdp_set_link_opts))
-		return libbpf_err(-EINVAL);
-
-	if (OPTS_HAS(opts, old_fd)) {
-		old_fd = OPTS_GET(opts, old_fd, -1);
-		flags |= XDP_FLAGS_REPLACE;
-	}
-
-	ret = __bpf_set_link_xdp_fd_replace(ifindex, fd, old_fd, flags);
-	return libbpf_err(ret);
-}
-
-int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
-{
-	int ret;
-
-	ret = __bpf_set_link_xdp_fd_replace(ifindex, fd, 0, flags);
-	return libbpf_err(ret);
-}
-
 static int __dump_link_nlmsg(struct nlmsghdr *nlh,
 			     libbpf_dump_nlmsg_t dump_link_nlmsg, void *cookie)
 {
@@ -413,30 +396,6 @@ int bpf_xdp_query(int ifindex, int xdp_flags, struct bpf_xdp_query_opts *opts)
 	return 0;
 }
 
-int bpf_get_link_xdp_info(int ifindex, struct xdp_link_info *info,
-			  size_t info_size, __u32 flags)
-{
-	LIBBPF_OPTS(bpf_xdp_query_opts, opts);
-	size_t sz;
-	int err;
-
-	if (!info_size)
-		return libbpf_err(-EINVAL);
-
-	err = bpf_xdp_query(ifindex, flags, &opts);
-	if (err)
-		return libbpf_err(err);
-
-	/* struct xdp_link_info field layout matches struct bpf_xdp_query_opts
-	 * layout after sz field
-	 */
-	sz = min(info_size, offsetofend(struct xdp_link_info, attach_mode));
-	memcpy(info, &opts.prog_id, sz);
-	memset((void *)info + sz, 0, info_size - sz);
-
-	return 0;
-}
-
 int bpf_xdp_query_id(int ifindex, int flags, __u32 *prog_id)
 {
 	LIBBPF_OPTS(bpf_xdp_query_opts, opts);
@@ -463,11 +422,6 @@ int bpf_xdp_query_id(int ifindex, int flags, __u32 *prog_id)
 }
 
 
-int bpf_get_link_xdp_id(int ifindex, __u32 *prog_id, __u32 flags)
-{
-	return bpf_xdp_query_id(ifindex, flags, prog_id);
-}
-
 typedef int (*qdisc_config_t)(struct libbpf_nla_req *req);
 
 static int clsact_config(struct libbpf_nla_req *req)