1 files changed, 64 insertions, 0 deletions
diff --git a/net/core/xdp.c b/net/core/xdp.c
index 844c9d99dc0e..a5a7ecf6391c 100644
--- a/net/core/xdp.c
+++ b/net/core/xdp.c
@@ -4,6 +4,7 @@
  * Copyright (c) 2017 Jesper Dangaard Brouer, Red Hat Inc.
  */
 #include <linux/bpf.h>
+#include <linux/btf_ids.h>
 #include <linux/filter.h>
 #include <linux/types.h>
 #include <linux/mm.h>
@@ -709,3 +710,66 @@ struct xdp_frame *xdpf_clone(struct xdp_frame *xdpf)
 
 	return nxdpf;
 }
+
+__diag_push();
+__diag_ignore_all("-Wmissing-prototypes",
+		  "Global functions as their definitions will be in vmlinux BTF");
+
+/**
+ * bpf_xdp_metadata_rx_timestamp - Read XDP frame RX timestamp.
+ * @ctx: XDP context pointer.
+ * @timestamp: Return value pointer.
+ *
+ * Returns 0 on success or ``-errno`` on error.
+ */
+int bpf_xdp_metadata_rx_timestamp(const struct xdp_md *ctx, u64 *timestamp)
+{
+	return -EOPNOTSUPP;
+}
+
+/**
+ * bpf_xdp_metadata_rx_hash - Read XDP frame RX hash.
+ * @ctx: XDP context pointer.
+ * @hash: Return value pointer.
+ *
+ * Returns 0 on success or ``-errno`` on error.
+ */
+int bpf_xdp_metadata_rx_hash(const struct xdp_md *ctx, u32 *hash)
+{
+	return -EOPNOTSUPP;
+}
+
+__diag_pop();
+
+BTF_SET8_START(xdp_metadata_kfunc_ids)
+#define XDP_METADATA_KFUNC(_, name) BTF_ID_FLAGS(func, name, 0)
+XDP_METADATA_KFUNC_xxx
+#undef XDP_METADATA_KFUNC
+BTF_SET8_END(xdp_metadata_kfunc_ids)
+
+static const struct btf_kfunc_id_set xdp_metadata_kfunc_set = {
+	.owner = THIS_MODULE,
+	.set   = &xdp_metadata_kfunc_ids,
+};
+
+BTF_ID_LIST(xdp_metadata_kfunc_ids_unsorted)
+#define XDP_METADATA_KFUNC(name, str) BTF_ID(func, str)
+XDP_METADATA_KFUNC_xxx
+#undef XDP_METADATA_KFUNC
+
+u32 bpf_xdp_metadata_kfunc_id(int id)
+{
+	/* xdp_metadata_kfunc_ids is sorted and can't be used */
+	return xdp_metadata_kfunc_ids_unsorted[id];
+}
+
+bool bpf_dev_bound_kfunc_id(u32 btf_id)
+{
+	return btf_id_set8_contains(&xdp_metadata_kfunc_ids, btf_id);
+}
+
+static int __init xdp_metadata_init(void)
+{
+	return register_btf_kfunc_id_set(BPF_PROG_TYPE_XDP, &xdp_metadata_kfunc_set);
+}
+late_initcall(xdp_metadata_init);