[mirror_ubuntu-jammy-kernel.git] / include / net / xdp_sock.h

/* 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/mm.h>
#include <net/sock.h>

struct net_device;
struct xsk_queue;

struct xdp_umem_props {
	u64 chunk_mask;
	u64 size;
};

struct xdp_umem_page {
	void *addr;
};

struct xdp_umem {
	struct xsk_queue *fq;
	struct xsk_queue *cq;
	struct xdp_umem_page *pages;
	struct xdp_umem_props props;
	u32 headroom;
	u32 chunk_size_nohr;
	struct user_struct *user;
	struct pid *pid;
	unsigned long address;
	refcount_t users;
	struct work_struct work;
	struct page **pgs;
	u32 npgs;
};

struct xdp_sock {
	/* struct sock must be the first member of struct xdp_sock */
	struct sock sk;
	struct xsk_queue *rx;
	struct net_device *dev;
	struct xdp_umem *umem;
	struct list_head flush_node;
	u16 queue_id;
	struct xsk_queue *tx ____cacheline_aligned_in_smp;
	/* Protects multiple processes in the control path */
	struct mutex mutex;
	u64 rx_dropped;
};

struct xdp_buff;
#ifdef CONFIG_XDP_SOCKETS
int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp);
int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp);
void xsk_flush(struct xdp_sock *xs);
bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs);
#else
static inline int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
{
	return -ENOTSUPP;
}

static inline int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
{
	return -ENOTSUPP;
}

static inline void xsk_flush(struct xdp_sock *xs)
{
}

static inline bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs)
{
	return false;
}
#endif /* CONFIG_XDP_SOCKETS */

#endif /* _LINUX_XDP_SOCK_H */
Commit	Line	Data
dac09149 BT	1	/* SPDX-License-Identifier: GPL-2.0 */
dac09149 BT	2	/* AF_XDP internal functions
c0c77d8f	3	* Copyright(c) 2018 Intel Corporation.
c0c77d8f BT	4	*/
	5
	6	#ifndef _LINUX_XDP_SOCK_H
	7	#define _LINUX_XDP_SOCK_H
	8
e61e62b9 BT	9	#include <linux/workqueue.h>
e61e62b9 BT	10	#include <linux/if_xdp.h>
c0c77d8f	11	#include <linux/mutex.h>
e61e62b9	12	#include <linux/mm.h>
c0c77d8f BT	13	#include <net/sock.h>
c0c77d8f BT	14
b9b6b68e BT	15	struct net_device;
b9b6b68e BT	16	struct xsk_queue;
e61e62b9 BT	17
	18	struct xdp_umem_props {
	19	u64 chunk_mask;
	20	u64 size;
	21	};
	22
8aef7340 BT	23	struct xdp_umem_page {
	24	void *addr;
	25	};
	26
e61e62b9 BT	27	struct xdp_umem {
	28	struct xsk_queue *fq;
	29	struct xsk_queue *cq;
8aef7340	30	struct xdp_umem_page *pages;
e61e62b9 BT	31	struct xdp_umem_props props;
	32	u32 headroom;
	33	u32 chunk_size_nohr;
	34	struct user_struct *user;
	35	struct pid *pid;
	36	unsigned long address;
	37	refcount_t users;
	38	struct work_struct work;
8aef7340	39	struct page **pgs;
e61e62b9 BT	40	u32 npgs;
e61e62b9 BT	41	};
c0c77d8f BT	42
	43	struct xdp_sock {
	44	/* struct sock must be the first member of struct xdp_sock */
	45	struct sock sk;
b9b6b68e BT	46	struct xsk_queue *rx;
b9b6b68e BT	47	struct net_device *dev;
c0c77d8f	48	struct xdp_umem *umem;
fbfc504a	49	struct list_head flush_node;
965a9909	50	u16 queue_id;
f6145903	51	struct xsk_queue *tx ____cacheline_aligned_in_smp;
c0c77d8f BT	52	/* Protects multiple processes in the control path */
c0c77d8f BT	53	struct mutex mutex;
c497176c	54	u64 rx_dropped;
c0c77d8f BT	55	};
c0c77d8f BT	56
c497176c BT	57	struct xdp_buff;
	58	#ifdef CONFIG_XDP_SOCKETS
	59	int xsk_generic_rcv(struct xdp_sock xs, struct xdp_buff xdp);
	60	int xsk_rcv(struct xdp_sock xs, struct xdp_buff xdp);
	61	void xsk_flush(struct xdp_sock *xs);
fbfc504a	62	bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs);
c497176c BT	63	#else
	64	static inline int xsk_generic_rcv(struct xdp_sock xs, struct xdp_buff xdp)
	65	{
	66	return -ENOTSUPP;
	67	}
	68
	69	static inline int xsk_rcv(struct xdp_sock xs, struct xdp_buff xdp)
	70	{
	71	return -ENOTSUPP;
	72	}
	73
	74	static inline void xsk_flush(struct xdp_sock *xs)
	75	{
	76	}
fbfc504a BT	77
	78	static inline bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs)
	79	{
	80	return false;
	81	}
c497176c BT	82	#endif /* CONFIG_XDP_SOCKETS */
c497176c BT	83
c0c77d8f	84	#endif /* _LINUX_XDP_SOCK_H */