[linux-block.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/bpf.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 */
	atomic_t count;
	struct xdp_sock __rcu *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);

#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)
{
}

#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
b6459415	9	#include <linux/bpf.h>
e61e62b9 BT	10	#include <linux/workqueue.h>
e61e62b9 BT	11	#include <linux/if_xdp.h>
c0c77d8f	12	#include <linux/mutex.h>
ac98d8aa	13	#include <linux/spinlock.h>
e61e62b9	14	#include <linux/mm.h>
c0c77d8f BT	15	#include <net/sock.h>
c0c77d8f BT	16
b9b6b68e BT	17	struct net_device;
b9b6b68e BT	18	struct xsk_queue;
a71506a4	19	struct xdp_buff;
e61e62b9	20
e61e62b9	21	struct xdp_umem {
7f7ffa4e	22	void *addrs;
93ee30f3	23	u64 size;
e61e62b9	24	u32 headroom;
2b43470a	25	u32 chunk_size;
1c1efc2a	26	u32 chunks;
8ef4e27e	27	u32 npgs;
e61e62b9	28	struct user_struct *user;
e61e62b9	29	refcount_t users;
77cd0d7b	30	u8 flags;
173d3adb	31	bool zc;
8ef4e27e MK	32	struct page **pgs;
8ef4e27e MK	33	int id;
921b6869	34	struct list_head xsk_dma_list;
537cf4e3	35	struct work_struct work;
e61e62b9	36	};
c0c77d8f	37
d817991c BT	38	struct xsk_map {
d817991c BT	39	struct bpf_map map;
d817991c	40	spinlock_t lock; /* Synchronize map updates */
b4fd0d67	41	atomic_t count;
782347b6	42	struct xdp_sock __rcu *xsk_map[];
d817991c BT	43	};
d817991c BT	44
c0c77d8f BT	45	struct xdp_sock {
	46	/* struct sock must be the first member of struct xdp_sock */
	47	struct sock sk;
8ef4e27e	48	struct xsk_queue *rx ____cacheline_aligned_in_smp;
b9b6b68e	49	struct net_device *dev;
c0c77d8f	50	struct xdp_umem *umem;
fbfc504a	51	struct list_head flush_node;
c4655761	52	struct xsk_buff_pool *pool;
965a9909	53	u16 queue_id;
ac98d8aa	54	bool zc;
455302d1 IM	55	enum {
	56	XSK_READY = 0,
	57	XSK_BOUND,
	58	XSK_UNBOUND,
	59	} state;
8ef4e27e	60
fada7fdc	61	struct xsk_queue *tx ____cacheline_aligned_in_smp;
a5aa8e52	62	struct list_head tx_list;
bf0bdd13 IM	63	/* Protects generic receive. */
bf0bdd13 IM	64	spinlock_t rx_lock;
8aa5a335 CL	65
8aa5a335 CL	66	/* Statistics */
c497176c	67	u64 rx_dropped;
8aa5a335 CL	68	u64 rx_queue_full;
8aa5a335 CL	69
0402acd6 BT	70	struct list_head map_list;
	71	/* Protects map_list */
	72	spinlock_t map_list_lock;
8ef4e27e MK	73	/* Protects multiple processes in the control path */
8ef4e27e MK	74	struct mutex mutex;
7361f9c3 MK	75	struct xsk_queue fq_tmp; / Only as tmp storage before bind */
7361f9c3 MK	76	struct xsk_queue cq_tmp; / Only as tmp storage before bind */
c0c77d8f BT	77	};
c0c77d8f BT	78
c497176c	79	#ifdef CONFIG_XDP_SOCKETS
90254034	80
a71506a4	81	int xsk_generic_rcv(struct xdp_sock xs, struct xdp_buff xdp);
e312b9e7 BT	82	int __xsk_map_redirect(struct xdp_sock xs, struct xdp_buff xdp);
e312b9e7 BT	83	void __xsk_map_flush(void);
d817991c	84
c497176c	85	#else
a71506a4	86
c497176c BT	87	static inline int xsk_generic_rcv(struct xdp_sock xs, struct xdp_buff xdp)
	88	{
	89	return -ENOTSUPP;
	90	}
	91
a71506a4	92	static inline int __xsk_map_redirect(struct xdp_sock xs, struct xdp_buff xdp)
f5bd9138	93	{
a71506a4	94	return -EOPNOTSUPP;
f5bd9138 JK	95	}
f5bd9138 JK	96
a71506a4	97	static inline void __xsk_map_flush(void)
f5bd9138 JK	98	{
	99	}
	100
c497176c BT	101	#endif /* CONFIG_XDP_SOCKETS */
c497176c BT	102
c0c77d8f	103	#endif /* _LINUX_XDP_SOCK_H */