89 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2 3#ifndef IOU_NAPI_H4#define IOU_NAPI_H5 6#include <linux/kernel.h>7#include <linux/io_uring.h>8#include <net/busy_poll.h>9 10#ifdef CONFIG_NET_RX_BUSY_POLL11 12void io_napi_init(struct io_ring_ctx *ctx);13void io_napi_free(struct io_ring_ctx *ctx);14 15int io_register_napi(struct io_ring_ctx *ctx, void __user *arg);16int io_unregister_napi(struct io_ring_ctx *ctx, void __user *arg);17 18void __io_napi_add(struct io_ring_ctx *ctx, struct socket *sock);19 20void __io_napi_busy_loop(struct io_ring_ctx *ctx, struct io_wait_queue *iowq);21int io_napi_sqpoll_busy_poll(struct io_ring_ctx *ctx);22 23static inline bool io_napi(struct io_ring_ctx *ctx)24{25 return !list_empty(&ctx->napi_list);26}27 28static inline void io_napi_busy_loop(struct io_ring_ctx *ctx,29 struct io_wait_queue *iowq)30{31 if (!io_napi(ctx))32 return;33 __io_napi_busy_loop(ctx, iowq);34}35 36/*37 * io_napi_add() - Add napi id to the busy poll list38 * @req: pointer to io_kiocb request39 *40 * Add the napi id of the socket to the napi busy poll list and hash table.41 */42static inline void io_napi_add(struct io_kiocb *req)43{44 struct io_ring_ctx *ctx = req->ctx;45 struct socket *sock;46 47 if (!READ_ONCE(ctx->napi_enabled))48 return;49 50 sock = sock_from_file(req->file);51 if (sock)52 __io_napi_add(ctx, sock);53}54 55#else56 57static inline void io_napi_init(struct io_ring_ctx *ctx)58{59}60static inline void io_napi_free(struct io_ring_ctx *ctx)61{62}63static inline int io_register_napi(struct io_ring_ctx *ctx, void __user *arg)64{65 return -EOPNOTSUPP;66}67static inline int io_unregister_napi(struct io_ring_ctx *ctx, void __user *arg)68{69 return -EOPNOTSUPP;70}71static inline bool io_napi(struct io_ring_ctx *ctx)72{73 return false;74}75static inline void io_napi_add(struct io_kiocb *req)76{77}78static inline void io_napi_busy_loop(struct io_ring_ctx *ctx,79 struct io_wait_queue *iowq)80{81}82static inline int io_napi_sqpoll_busy_poll(struct io_ring_ctx *ctx)83{84 return 0;85}86#endif /* CONFIG_NET_RX_BUSY_POLL */87 88#endif89