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-rw-r--r--include/net/xdp_sock.h120
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 */