1 files changed, 120 insertions, 0 deletions
diff --git a/include/net/xdp_sock.h b/include/net/xdp_sock.h
new file mode 100644
index 000000000..cc17bc957
--- /dev/null
+++ b/include/net/xdp_sock.h
@@ -0,0 +1,120 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* AF_XDP internal functions
+ * Copyright(c) 2018 Intel Corporation.
+ */
+
+#ifndef _LINUX_XDP_SOCK_H
+#define _LINUX_XDP_SOCK_H
+
+#include <linux/workqueue.h>
+#include <linux/if_xdp.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <net/sock.h>
+
+struct net_device;
+struct xsk_queue;
+struct xdp_buff;
+
+struct xdp_umem {
+	void *addrs;
+	u64 size;
+	u32 headroom;
+	u32 chunk_size;
+	u32 chunks;
+	u32 npgs;
+	struct user_struct *user;
+	refcount_t users;
+	u8 flags;
+	bool zc;
+	struct page **pgs;
+	int id;
+	struct list_head xsk_dma_list;
+	struct work_struct work;
+};
+
+struct xsk_map {
+	struct bpf_map map;
+	spinlock_t lock; /* Synchronize map updates */
+	struct xdp_sock *xsk_map[];
+};
+
+struct xdp_sock {
+	/* struct sock must be the first member of struct xdp_sock */
+	struct sock sk;
+	struct xsk_queue *rx ____cacheline_aligned_in_smp;
+	struct net_device *dev;
+	struct xdp_umem *umem;
+	struct list_head flush_node;
+	struct xsk_buff_pool *pool;
+	u16 queue_id;
+	bool zc;
+	enum {
+		XSK_READY = 0,
+		XSK_BOUND,
+		XSK_UNBOUND,
+	} state;
+
+	struct xsk_queue *tx ____cacheline_aligned_in_smp;
+	struct list_head tx_list;
+	/* Protects generic receive. */
+	spinlock_t rx_lock;
+
+	/* Statistics */
+	u64 rx_dropped;
+	u64 rx_queue_full;
+
+	struct list_head map_list;
+	/* Protects map_list */
+	spinlock_t map_list_lock;
+	/* Protects multiple processes in the control path */
+	struct mutex mutex;
+	struct xsk_queue *fq_tmp; /* Only as tmp storage before bind */
+	struct xsk_queue *cq_tmp; /* Only as tmp storage before bind */
+};
+
+#ifdef CONFIG_XDP_SOCKETS
+
+int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp);
+int __xsk_map_redirect(struct xdp_sock *xs, struct xdp_buff *xdp);
+void __xsk_map_flush(void);
+
+static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
+						     u32 key)
+{
+	struct xsk_map *m = container_of(map, struct xsk_map, map);
+	struct xdp_sock *xs;
+
+	if (key >= map->max_entries)
+		return NULL;
+
+	xs = READ_ONCE(m->xsk_map[key]);
+	return xs;
+}
+
+#else
+
+static inline int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
+{
+	return -ENOTSUPP;
+}
+
+static inline int __xsk_map_redirect(struct xdp_sock *xs, struct xdp_buff *xdp)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline void __xsk_map_flush(void)
+{
+}
+
+static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
+						     u32 key)
+{
+	return NULL;
+}
+
+#endif /* CONFIG_XDP_SOCKETS */
+
+#endif /* _LINUX_XDP_SOCK_H */