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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#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