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e6a4750ffe
Currently the bpf_redirect_map() implementation dispatches to the correct map-lookup function via a switch-statement. To avoid the dispatching, this change adds bpf_redirect_map() as a map operation. Each map provides its bpf_redirect_map() version, and correct function is automatically selected by the BPF verifier. A nice side-effect of the code movement is that the map lookup functions are now local to the map implementation files, which removes one additional function call. Signed-off-by: Björn Töpel <bjorn.topel@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> Link: https://lore.kernel.org/bpf/20210308112907.559576-2-bjorn.topel@gmail.com
101 lines
2 KiB
C
101 lines
2 KiB
C
/* 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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#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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#endif /* CONFIG_XDP_SOCKETS */
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#endif /* _LINUX_XDP_SOCK_H */
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