/* SPDX-License-Identifier: GPL-2.0 */ #ifndef IOU_NAPI_H#define IOU_NAPI_H #include <linux/kernel.h>#include <linux/io_uring.h>#include <net/busy_poll.h> #ifdef CONFIG_NET_RX_BUSY_POLL void io_napi_init(struct io_ring_ctx *ctx);void io_napi_free(struct io_ring_ctx *ctx); int io_register_napi(struct io_ring_ctx *ctx, void __user *arg);int io_unregister_napi(struct io_ring_ctx *ctx, void __user *arg); int __io_napi_add_id(struct io_ring_ctx *ctx, unsigned int napi_id,		     unsigned int mode); void __io_napi_busy_loop(struct io_ring_ctx *ctx, struct io_wait_queue *iowq);int io_napi_sqpoll_busy_poll(struct io_ring_ctx *ctx); static inline bool io_napi(struct io_ring_ctx *ctx){	return !list_empty(&ctx->napi_list);} static inline void io_napi_busy_loop(struct io_ring_ctx *ctx,				     struct io_wait_queue *iowq){	if (!io_napi(ctx))		return;	__io_napi_busy_loop(ctx, iowq);} /* * io_napi_add() - Add napi id to the busy poll list * @req: pointer to io_kiocb request * * Add the napi id of the socket to the napi busy poll list and hash table. */static inline void io_napi_add(struct io_kiocb *req){	struct io_ring_ctx *ctx = req->ctx;	struct socket *sock;	unsigned int mode = IO_URING_NAPI_TRACKING_DYNAMIC; 	if (READ_ONCE(ctx->napi_track_mode) != mode)		return; 	sock = sock_from_file(req->file);	if (sock && sock->sk)		__io_napi_add_id(ctx, READ_ONCE(sock->sk->sk_napi_id), mode);} #else static inline void io_napi_init(struct io_ring_ctx *ctx){}static inline void io_napi_free(struct io_ring_ctx *ctx){}static inline int io_register_napi(struct io_ring_ctx *ctx, void __user *arg){	return -EOPNOTSUPP;}static inline int io_unregister_napi(struct io_ring_ctx *ctx, void __user *arg){	return -EOPNOTSUPP;}static inline bool io_napi(struct io_ring_ctx *ctx){	return false;}static inline void io_napi_add(struct io_kiocb *req){}static inline void io_napi_busy_loop(struct io_ring_ctx *ctx,				     struct io_wait_queue *iowq){}static inline int io_napi_sqpoll_busy_poll(struct io_ring_ctx *ctx){	return 0;}#endif /* CONFIG_NET_RX_BUSY_POLL */ #endif