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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/include/uapi/linux/if_xdp.h
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@@ -16,6 +16,18 @@
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 #define XDP_SHARED_UMEM	(1 << 0)
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 #define XDP_COPY	(1 << 1) /* Force copy-mode */
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 #define XDP_ZEROCOPY	(1 << 2) /* Force zero-copy mode */
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+/* If this option is set, the driver might go sleep and in that case
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+ * the XDP_RING_NEED_WAKEUP flag in the fill and/or Tx rings will be
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+ * set. If it is set, the application need to explicitly wake up the
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+ * driver with a poll() (Rx and Tx) or sendto() (Tx only). If you are
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+ * running the driver and the application on the same core, you should
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+ * use this option so that the kernel will yield to the user space
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+ * application.
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+ */
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+#define XDP_USE_NEED_WAKEUP (1 << 3)
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+
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+/* Flags for xsk_umem_config flags */
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+#define XDP_UMEM_UNALIGNED_CHUNK_FLAG (1 << 0)
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 struct sockaddr_xdp {
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 	__u16 sxdp_family;
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@@ -25,10 +37,14 @@
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 	__u32 sxdp_shared_umem_fd;
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 };
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+/* XDP_RING flags */
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+#define XDP_RING_NEED_WAKEUP (1 << 0)
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+
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 struct xdp_ring_offset {
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 	__u64 producer;
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 	__u64 consumer;
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 	__u64 desc;
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+	__u64 flags;
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 };
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 struct xdp_mmap_offsets {
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@@ -46,19 +62,31 @@
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 #define XDP_UMEM_FILL_RING		5
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 #define XDP_UMEM_COMPLETION_RING	6
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 #define XDP_STATISTICS			7
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+#define XDP_OPTIONS			8
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66
 
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 struct xdp_umem_reg {
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 	__u64 addr; /* Start of packet data area */
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 	__u64 len; /* Length of packet data area */
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 	__u32 chunk_size;
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 	__u32 headroom;
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+	__u32 flags;
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 };
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 struct xdp_statistics {
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-	__u64 rx_dropped; /* Dropped for reasons other than invalid desc */
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+	__u64 rx_dropped; /* Dropped for other reasons */
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 	__u64 rx_invalid_descs; /* Dropped due to invalid descriptor */
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 	__u64 tx_invalid_descs; /* Dropped due to invalid descriptor */
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+	__u64 rx_ring_full; /* Dropped due to rx ring being full */
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+	__u64 rx_fill_ring_empty_descs; /* Failed to retrieve item from fill ring */
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+	__u64 tx_ring_empty_descs; /* Failed to retrieve item from tx ring */
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 };
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+
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+struct xdp_options {
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+	__u32 flags;
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+};
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+
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+/* Flags for the flags field of struct xdp_options */
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+#define XDP_OPTIONS_ZEROCOPY (1 << 0)
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90
 
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 /* Pgoff for mmaping the rings */
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 #define XDP_PGOFF_RX_RING			  0
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@@ -66,6 +94,11 @@
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 #define XDP_UMEM_PGOFF_FILL_RING	0x100000000ULL
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 #define XDP_UMEM_PGOFF_COMPLETION_RING	0x180000000ULL
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+/* Masks for unaligned chunks mode */
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+#define XSK_UNALIGNED_BUF_OFFSET_SHIFT 48
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+#define XSK_UNALIGNED_BUF_ADDR_MASK \
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+	((1ULL << XSK_UNALIGNED_BUF_OFFSET_SHIFT) - 1)
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+
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 /* Rx/Tx descriptor */
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 struct xdp_desc {
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 	__u64 addr;