1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* AF_XDP internal functions
3 * Copyright(c) 2018 Intel Corporation.
6 #ifndef _LINUX_XDP_SOCK_H
7 #define _LINUX_XDP_SOCK_H
9 #include <linux/workqueue.h>
10 #include <linux/if_xdp.h>
11 #include <linux/mutex.h>
12 #include <linux/spinlock.h>
27 struct user_struct *user;
33 struct list_head xsk_dma_list;
38 spinlock_t lock; /* Synchronize map updates */
39 struct xdp_sock *xsk_map[];
43 /* struct sock must be the first member of struct xdp_sock */
45 struct xsk_queue *rx ____cacheline_aligned_in_smp;
46 struct net_device *dev;
47 struct xdp_umem *umem;
48 struct list_head flush_node;
49 struct xsk_buff_pool *pool;
58 struct xsk_queue *tx ____cacheline_aligned_in_smp;
59 struct list_head tx_list;
60 /* Mutual exclusion of NAPI TX thread and sendmsg error paths
61 * in the SKB destructor callback.
63 spinlock_t tx_completion_lock;
64 /* Protects generic receive. */
71 struct list_head map_list;
72 /* Protects map_list */
73 spinlock_t map_list_lock;
74 /* Protects multiple processes in the control path */
76 struct xsk_queue *fq_tmp; /* Only as tmp storage before bind */
77 struct xsk_queue *cq_tmp; /* Only as tmp storage before bind */
80 #ifdef CONFIG_XDP_SOCKETS
82 int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp);
83 int __xsk_map_redirect(struct xdp_sock *xs, struct xdp_buff *xdp);
84 void __xsk_map_flush(void);
86 static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
89 struct xsk_map *m = container_of(map, struct xsk_map, map);
92 if (key >= map->max_entries)
95 xs = READ_ONCE(m->xsk_map[key]);
101 static inline int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
106 static inline int __xsk_map_redirect(struct xdp_sock *xs, struct xdp_buff *xdp)
111 static inline void __xsk_map_flush(void)
115 static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
121 #endif /* CONFIG_XDP_SOCKETS */
123 #endif /* _LINUX_XDP_SOCK_H */