xdp: move struct xdp_buff from filter.h to xdp.h

[linux-2.6-block.git] / include / net / xdp.h

diff --git a/include/net/xdp.h b/include/net/xdp.h
index e4207699c4103b8320857b8e6dffc05e19e60fd0..15f8ade008b5f58e9d84601120a8de319099bf1d 100644 (file)
--- a/include/net/xdp.h
+++ b/include/net/xdp.h
@@ -50,6 +50,13 @@ struct xdp_rxq_info {
        struct xdp_mem_info mem;
 } ____cacheline_aligned; /* perf critical, avoid false-sharing */
 
+struct xdp_buff {
+       void *data;
+       void *data_end;
+       void *data_meta;
+       void *data_hard_start;
+       struct xdp_rxq_info *rxq;
+};
 
 static inline
 void xdp_return_frame(void *data, struct xdp_mem_info *mem)
@@ -72,4 +79,19 @@ bool xdp_rxq_info_is_reg(struct xdp_rxq_info *xdp_rxq);
 int xdp_rxq_info_reg_mem_model(struct xdp_rxq_info *xdp_rxq,
                               enum xdp_mem_type type, void *allocator);
 
+/* Drivers not supporting XDP metadata can use this helper, which
+ * rejects any room expansion for metadata as a result.
+ */
+static __always_inline void
+xdp_set_data_meta_invalid(struct xdp_buff *xdp)
+{
+       xdp->data_meta = xdp->data + 1;
+}
+
+static __always_inline bool
+xdp_data_meta_unsupported(const struct xdp_buff *xdp)
+{
+       return unlikely(xdp->data_meta > xdp->data);
+}
+
 #endif /* __LINUX_NET_XDP_H__ */