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