bpf: fix kabi for struct bpf_prog_aux and struct bpf_raw_event_map

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I3U9MR
CVE: NA

-------------------------------------------------

commit 9df1c28b ("bpf: add writable context for raw tracepoints")
add new member into struct bpf_prog_aux and struct bpf_raw_event_map,
which will break KABI. This patch try to fix it.
Signed-off-by: NYufen Yu <yuyufen@huawei.com>
Reviewed-by: NHou Tao <houtao1@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

include/linux/bpf.h

@@ -213,6 +213,7 @@ enum bpf_reg_type {
 	PTR_TO_PACKET_META,	 /* skb->data - meta_len */
 	PTR_TO_PACKET,		 /* reg points to skb->data */
 	PTR_TO_PACKET_END,	 /* skb->data + headlen */
+#ifndef __GENKSYMS__
 	PTR_TO_FLOW_KEYS,	 /* reg points to bpf_flow_keys */
 	PTR_TO_SOCKET,		 /* reg points to struct bpf_sock */
 	PTR_TO_SOCKET_OR_NULL,	 /* reg points to struct bpf_sock or NULL */
@@ -221,6 +222,7 @@ enum bpf_reg_type {
 	PTR_TO_TCP_SOCK,	 /* reg points to struct tcp_sock */
 	PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
 	PTR_TO_TP_BUFFER,	 /* reg points to a writable raw tp's buffer */
+#endif
 };
 
 /* The information passed from prog-specific *_is_valid_access
@@ -284,7 +286,10 @@ struct bpf_prog_aux {
 	atomic_t refcnt;
 	u32 used_map_cnt;
 	u32 max_ctx_offset;
+	/* not protected by KABI, safe to extend in the middle */
+#ifndef __GENKSYMS__
 	u32 max_tp_access;
+#endif
 	u32 stack_depth;
 	u32 id;
 	u32 func_cnt;

include/linux/tracepoint-defs.h

@@ -45,7 +45,9 @@ struct bpf_raw_event_map {
 	struct tracepoint	*tp;
 	void			*bpf_func;
 	u32			num_args;
+#ifndef __GENKSYMS__
 	u32			writable_size;
+#endif
 } __aligned(32);
 
 #endif

include/uapi/linux/bpf.h

@@ -153,9 +153,11 @@ enum bpf_prog_type {
 	BPF_PROG_TYPE_LWT_SEG6LOCAL,
 	BPF_PROG_TYPE_LIRC_MODE2,
 	BPF_PROG_TYPE_SK_REUSEPORT,
+#ifndef __GENKSYMS__
 	BPF_PROG_TYPE_FLOW_DISSECTOR,
 	BPF_PROG_TYPE_CGROUP_SYSCTL,
 	BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE,
+#endif
 };
 
 enum bpf_attach_type {